mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2025-11-04 05:17:07 +00:00
6d116bc7ce
Move GetConstantStringInfo to lib/Analysis. Remove string output routine from Constant. Update all callers. Change debug intrinsic api slightly to accomodate move of routine, these now return values instead of strings. This unbreaks llvm-gcc bootstrap. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52884 91177308-0d34-0410-b5e6-96231b3b80d8
4901 lines
175 KiB
C++
4901 lines
175 KiB
C++
//===-- SelectionDAG.cpp - Implement the SelectionDAG data structures -----===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This implements the SelectionDAG class.
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//
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//===----------------------------------------------------------------------===//
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#include "llvm/CodeGen/SelectionDAG.h"
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#include "llvm/Constants.h"
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#include "llvm/GlobalAlias.h"
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#include "llvm/GlobalVariable.h"
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#include "llvm/Intrinsics.h"
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#include "llvm/DerivedTypes.h"
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#include "llvm/Assembly/Writer.h"
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#include "llvm/CallingConv.h"
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#include "llvm/CodeGen/MachineBasicBlock.h"
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#include "llvm/CodeGen/MachineConstantPool.h"
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#include "llvm/CodeGen/MachineFrameInfo.h"
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#include "llvm/CodeGen/MachineModuleInfo.h"
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#include "llvm/CodeGen/PseudoSourceValue.h"
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#include "llvm/Support/MathExtras.h"
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#include "llvm/Target/TargetRegisterInfo.h"
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#include "llvm/Target/TargetData.h"
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#include "llvm/Target/TargetLowering.h"
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#include "llvm/Target/TargetInstrInfo.h"
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#include "llvm/Target/TargetMachine.h"
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#include "llvm/ADT/SetVector.h"
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#include "llvm/ADT/SmallPtrSet.h"
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#include "llvm/ADT/SmallSet.h"
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#include "llvm/ADT/SmallVector.h"
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#include "llvm/ADT/StringExtras.h"
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#include <algorithm>
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#include <cmath>
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using namespace llvm;
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/// makeVTList - Return an instance of the SDVTList struct initialized with the
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/// specified members.
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static SDVTList makeVTList(const MVT *VTs, unsigned NumVTs) {
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SDVTList Res = {VTs, NumVTs};
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return Res;
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}
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static const fltSemantics *MVTToAPFloatSemantics(MVT VT) {
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switch (VT.getSimpleVT()) {
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default: assert(0 && "Unknown FP format");
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case MVT::f32: return &APFloat::IEEEsingle;
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case MVT::f64: return &APFloat::IEEEdouble;
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case MVT::f80: return &APFloat::x87DoubleExtended;
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case MVT::f128: return &APFloat::IEEEquad;
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case MVT::ppcf128: return &APFloat::PPCDoubleDouble;
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}
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}
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SelectionDAG::DAGUpdateListener::~DAGUpdateListener() {}
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//===----------------------------------------------------------------------===//
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// ConstantFPSDNode Class
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//===----------------------------------------------------------------------===//
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/// isExactlyValue - We don't rely on operator== working on double values, as
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/// it returns true for things that are clearly not equal, like -0.0 and 0.0.
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/// As such, this method can be used to do an exact bit-for-bit comparison of
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/// two floating point values.
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bool ConstantFPSDNode::isExactlyValue(const APFloat& V) const {
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return Value.bitwiseIsEqual(V);
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}
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bool ConstantFPSDNode::isValueValidForType(MVT VT,
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const APFloat& Val) {
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assert(VT.isFloatingPoint() && "Can only convert between FP types");
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// PPC long double cannot be converted to any other type.
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if (VT == MVT::ppcf128 ||
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&Val.getSemantics() == &APFloat::PPCDoubleDouble)
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return false;
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// convert modifies in place, so make a copy.
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APFloat Val2 = APFloat(Val);
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return Val2.convert(*MVTToAPFloatSemantics(VT),
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APFloat::rmNearestTiesToEven) == APFloat::opOK;
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}
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//===----------------------------------------------------------------------===//
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// ISD Namespace
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//===----------------------------------------------------------------------===//
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/// isBuildVectorAllOnes - Return true if the specified node is a
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/// BUILD_VECTOR where all of the elements are ~0 or undef.
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bool ISD::isBuildVectorAllOnes(const SDNode *N) {
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// Look through a bit convert.
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if (N->getOpcode() == ISD::BIT_CONVERT)
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N = N->getOperand(0).Val;
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if (N->getOpcode() != ISD::BUILD_VECTOR) return false;
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unsigned i = 0, e = N->getNumOperands();
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// Skip over all of the undef values.
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while (i != e && N->getOperand(i).getOpcode() == ISD::UNDEF)
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++i;
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// Do not accept an all-undef vector.
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if (i == e) return false;
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// Do not accept build_vectors that aren't all constants or which have non-~0
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// elements.
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SDOperand NotZero = N->getOperand(i);
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if (isa<ConstantSDNode>(NotZero)) {
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if (!cast<ConstantSDNode>(NotZero)->isAllOnesValue())
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return false;
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} else if (isa<ConstantFPSDNode>(NotZero)) {
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if (!cast<ConstantFPSDNode>(NotZero)->getValueAPF().
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convertToAPInt().isAllOnesValue())
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return false;
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} else
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return false;
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// Okay, we have at least one ~0 value, check to see if the rest match or are
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// undefs.
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for (++i; i != e; ++i)
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if (N->getOperand(i) != NotZero &&
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N->getOperand(i).getOpcode() != ISD::UNDEF)
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return false;
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return true;
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}
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/// isBuildVectorAllZeros - Return true if the specified node is a
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/// BUILD_VECTOR where all of the elements are 0 or undef.
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bool ISD::isBuildVectorAllZeros(const SDNode *N) {
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// Look through a bit convert.
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if (N->getOpcode() == ISD::BIT_CONVERT)
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N = N->getOperand(0).Val;
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if (N->getOpcode() != ISD::BUILD_VECTOR) return false;
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unsigned i = 0, e = N->getNumOperands();
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// Skip over all of the undef values.
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while (i != e && N->getOperand(i).getOpcode() == ISD::UNDEF)
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++i;
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// Do not accept an all-undef vector.
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if (i == e) return false;
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// Do not accept build_vectors that aren't all constants or which have non-~0
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// elements.
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SDOperand Zero = N->getOperand(i);
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if (isa<ConstantSDNode>(Zero)) {
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if (!cast<ConstantSDNode>(Zero)->isNullValue())
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return false;
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} else if (isa<ConstantFPSDNode>(Zero)) {
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if (!cast<ConstantFPSDNode>(Zero)->getValueAPF().isPosZero())
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return false;
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} else
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return false;
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// Okay, we have at least one ~0 value, check to see if the rest match or are
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// undefs.
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for (++i; i != e; ++i)
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if (N->getOperand(i) != Zero &&
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N->getOperand(i).getOpcode() != ISD::UNDEF)
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return false;
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return true;
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}
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/// isScalarToVector - Return true if the specified node is a
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/// ISD::SCALAR_TO_VECTOR node or a BUILD_VECTOR node where only the low
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/// element is not an undef.
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bool ISD::isScalarToVector(const SDNode *N) {
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if (N->getOpcode() == ISD::SCALAR_TO_VECTOR)
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return true;
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if (N->getOpcode() != ISD::BUILD_VECTOR)
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return false;
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if (N->getOperand(0).getOpcode() == ISD::UNDEF)
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return false;
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unsigned NumElems = N->getNumOperands();
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for (unsigned i = 1; i < NumElems; ++i) {
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SDOperand V = N->getOperand(i);
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if (V.getOpcode() != ISD::UNDEF)
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return false;
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}
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return true;
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}
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/// isDebugLabel - Return true if the specified node represents a debug
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/// label (i.e. ISD::LABEL or TargetInstrInfo::LABEL node and third operand
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/// is 0).
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bool ISD::isDebugLabel(const SDNode *N) {
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SDOperand Zero;
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if (N->getOpcode() == ISD::LABEL)
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Zero = N->getOperand(2);
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else if (N->isTargetOpcode() &&
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N->getTargetOpcode() == TargetInstrInfo::LABEL)
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// Chain moved to last operand.
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Zero = N->getOperand(1);
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else
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return false;
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return isa<ConstantSDNode>(Zero) && cast<ConstantSDNode>(Zero)->isNullValue();
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}
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/// getSetCCSwappedOperands - Return the operation corresponding to (Y op X)
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/// when given the operation for (X op Y).
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ISD::CondCode ISD::getSetCCSwappedOperands(ISD::CondCode Operation) {
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// To perform this operation, we just need to swap the L and G bits of the
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// operation.
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unsigned OldL = (Operation >> 2) & 1;
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unsigned OldG = (Operation >> 1) & 1;
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return ISD::CondCode((Operation & ~6) | // Keep the N, U, E bits
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(OldL << 1) | // New G bit
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(OldG << 2)); // New L bit.
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}
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/// getSetCCInverse - Return the operation corresponding to !(X op Y), where
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/// 'op' is a valid SetCC operation.
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ISD::CondCode ISD::getSetCCInverse(ISD::CondCode Op, bool isInteger) {
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unsigned Operation = Op;
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if (isInteger)
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Operation ^= 7; // Flip L, G, E bits, but not U.
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else
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Operation ^= 15; // Flip all of the condition bits.
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if (Operation > ISD::SETTRUE2)
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Operation &= ~8; // Don't let N and U bits get set.
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return ISD::CondCode(Operation);
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}
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/// isSignedOp - For an integer comparison, return 1 if the comparison is a
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/// signed operation and 2 if the result is an unsigned comparison. Return zero
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/// if the operation does not depend on the sign of the input (setne and seteq).
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static int isSignedOp(ISD::CondCode Opcode) {
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switch (Opcode) {
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default: assert(0 && "Illegal integer setcc operation!");
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case ISD::SETEQ:
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case ISD::SETNE: return 0;
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case ISD::SETLT:
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case ISD::SETLE:
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case ISD::SETGT:
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case ISD::SETGE: return 1;
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case ISD::SETULT:
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case ISD::SETULE:
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case ISD::SETUGT:
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case ISD::SETUGE: return 2;
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}
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}
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/// getSetCCOrOperation - Return the result of a logical OR between different
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/// comparisons of identical values: ((X op1 Y) | (X op2 Y)). This function
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/// returns SETCC_INVALID if it is not possible to represent the resultant
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/// comparison.
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ISD::CondCode ISD::getSetCCOrOperation(ISD::CondCode Op1, ISD::CondCode Op2,
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bool isInteger) {
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if (isInteger && (isSignedOp(Op1) | isSignedOp(Op2)) == 3)
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// Cannot fold a signed integer setcc with an unsigned integer setcc.
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return ISD::SETCC_INVALID;
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unsigned Op = Op1 | Op2; // Combine all of the condition bits.
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// If the N and U bits get set then the resultant comparison DOES suddenly
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// care about orderedness, and is true when ordered.
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if (Op > ISD::SETTRUE2)
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Op &= ~16; // Clear the U bit if the N bit is set.
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// Canonicalize illegal integer setcc's.
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if (isInteger && Op == ISD::SETUNE) // e.g. SETUGT | SETULT
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Op = ISD::SETNE;
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return ISD::CondCode(Op);
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}
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/// getSetCCAndOperation - Return the result of a logical AND between different
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/// comparisons of identical values: ((X op1 Y) & (X op2 Y)). This
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/// function returns zero if it is not possible to represent the resultant
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/// comparison.
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ISD::CondCode ISD::getSetCCAndOperation(ISD::CondCode Op1, ISD::CondCode Op2,
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bool isInteger) {
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if (isInteger && (isSignedOp(Op1) | isSignedOp(Op2)) == 3)
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// Cannot fold a signed setcc with an unsigned setcc.
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return ISD::SETCC_INVALID;
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// Combine all of the condition bits.
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ISD::CondCode Result = ISD::CondCode(Op1 & Op2);
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// Canonicalize illegal integer setcc's.
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if (isInteger) {
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switch (Result) {
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default: break;
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case ISD::SETUO : Result = ISD::SETFALSE; break; // SETUGT & SETULT
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case ISD::SETOEQ: // SETEQ & SETU[LG]E
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case ISD::SETUEQ: Result = ISD::SETEQ ; break; // SETUGE & SETULE
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case ISD::SETOLT: Result = ISD::SETULT ; break; // SETULT & SETNE
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case ISD::SETOGT: Result = ISD::SETUGT ; break; // SETUGT & SETNE
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}
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}
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return Result;
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}
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const TargetMachine &SelectionDAG::getTarget() const {
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return TLI.getTargetMachine();
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}
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//===----------------------------------------------------------------------===//
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// SDNode Profile Support
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//===----------------------------------------------------------------------===//
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/// AddNodeIDOpcode - Add the node opcode to the NodeID data.
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///
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static void AddNodeIDOpcode(FoldingSetNodeID &ID, unsigned OpC) {
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ID.AddInteger(OpC);
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}
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/// AddNodeIDValueTypes - Value type lists are intern'd so we can represent them
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/// solely with their pointer.
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static void AddNodeIDValueTypes(FoldingSetNodeID &ID, SDVTList VTList) {
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ID.AddPointer(VTList.VTs);
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}
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/// AddNodeIDOperands - Various routines for adding operands to the NodeID data.
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///
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static void AddNodeIDOperands(FoldingSetNodeID &ID,
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SDOperandPtr Ops, unsigned NumOps) {
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for (; NumOps; --NumOps, ++Ops) {
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ID.AddPointer(Ops->Val);
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ID.AddInteger(Ops->ResNo);
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}
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}
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static void AddNodeIDNode(FoldingSetNodeID &ID,
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unsigned short OpC, SDVTList VTList,
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SDOperandPtr OpList, unsigned N) {
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AddNodeIDOpcode(ID, OpC);
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AddNodeIDValueTypes(ID, VTList);
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AddNodeIDOperands(ID, OpList, N);
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}
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/// AddNodeIDNode - Generic routine for adding a nodes info to the NodeID
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/// data.
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static void AddNodeIDNode(FoldingSetNodeID &ID, SDNode *N) {
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AddNodeIDOpcode(ID, N->getOpcode());
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// Add the return value info.
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AddNodeIDValueTypes(ID, N->getVTList());
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// Add the operand info.
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AddNodeIDOperands(ID, N->op_begin(), N->getNumOperands());
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// Handle SDNode leafs with special info.
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switch (N->getOpcode()) {
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default: break; // Normal nodes don't need extra info.
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case ISD::ARG_FLAGS:
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ID.AddInteger(cast<ARG_FLAGSSDNode>(N)->getArgFlags().getRawBits());
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break;
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case ISD::TargetConstant:
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case ISD::Constant:
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ID.Add(cast<ConstantSDNode>(N)->getAPIntValue());
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break;
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case ISD::TargetConstantFP:
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case ISD::ConstantFP: {
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ID.Add(cast<ConstantFPSDNode>(N)->getValueAPF());
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break;
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}
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case ISD::TargetGlobalAddress:
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case ISD::GlobalAddress:
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case ISD::TargetGlobalTLSAddress:
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case ISD::GlobalTLSAddress: {
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GlobalAddressSDNode *GA = cast<GlobalAddressSDNode>(N);
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ID.AddPointer(GA->getGlobal());
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ID.AddInteger(GA->getOffset());
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break;
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}
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case ISD::BasicBlock:
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ID.AddPointer(cast<BasicBlockSDNode>(N)->getBasicBlock());
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break;
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case ISD::Register:
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ID.AddInteger(cast<RegisterSDNode>(N)->getReg());
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break;
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case ISD::SRCVALUE:
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ID.AddPointer(cast<SrcValueSDNode>(N)->getValue());
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break;
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case ISD::MEMOPERAND: {
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const MachineMemOperand &MO = cast<MemOperandSDNode>(N)->MO;
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ID.AddPointer(MO.getValue());
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ID.AddInteger(MO.getFlags());
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ID.AddInteger(MO.getOffset());
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ID.AddInteger(MO.getSize());
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ID.AddInteger(MO.getAlignment());
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break;
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}
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case ISD::FrameIndex:
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case ISD::TargetFrameIndex:
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ID.AddInteger(cast<FrameIndexSDNode>(N)->getIndex());
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break;
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case ISD::JumpTable:
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case ISD::TargetJumpTable:
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ID.AddInteger(cast<JumpTableSDNode>(N)->getIndex());
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break;
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case ISD::ConstantPool:
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case ISD::TargetConstantPool: {
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ConstantPoolSDNode *CP = cast<ConstantPoolSDNode>(N);
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ID.AddInteger(CP->getAlignment());
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ID.AddInteger(CP->getOffset());
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if (CP->isMachineConstantPoolEntry())
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CP->getMachineCPVal()->AddSelectionDAGCSEId(ID);
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else
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ID.AddPointer(CP->getConstVal());
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break;
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}
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case ISD::LOAD: {
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LoadSDNode *LD = cast<LoadSDNode>(N);
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ID.AddInteger(LD->getAddressingMode());
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ID.AddInteger(LD->getExtensionType());
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ID.AddInteger(LD->getMemoryVT().getRawBits());
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ID.AddInteger(LD->getAlignment());
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ID.AddInteger(LD->isVolatile());
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break;
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}
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case ISD::STORE: {
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StoreSDNode *ST = cast<StoreSDNode>(N);
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ID.AddInteger(ST->getAddressingMode());
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ID.AddInteger(ST->isTruncatingStore());
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ID.AddInteger(ST->getMemoryVT().getRawBits());
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ID.AddInteger(ST->getAlignment());
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ID.AddInteger(ST->isVolatile());
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break;
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}
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case ISD::ATOMIC_CMP_SWAP:
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case ISD::ATOMIC_LOAD_ADD:
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case ISD::ATOMIC_SWAP:
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case ISD::ATOMIC_LOAD_SUB:
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case ISD::ATOMIC_LOAD_AND:
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case ISD::ATOMIC_LOAD_OR:
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case ISD::ATOMIC_LOAD_XOR:
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case ISD::ATOMIC_LOAD_NAND:
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case ISD::ATOMIC_LOAD_MIN:
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case ISD::ATOMIC_LOAD_MAX:
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case ISD::ATOMIC_LOAD_UMIN:
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case ISD::ATOMIC_LOAD_UMAX: {
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AtomicSDNode *AT = cast<AtomicSDNode>(N);
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ID.AddInteger(AT->getAlignment());
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ID.AddInteger(AT->isVolatile());
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break;
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}
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} // end switch (N->getOpcode())
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}
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//===----------------------------------------------------------------------===//
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// SelectionDAG Class
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//===----------------------------------------------------------------------===//
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/// RemoveDeadNodes - This method deletes all unreachable nodes in the
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/// SelectionDAG.
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void SelectionDAG::RemoveDeadNodes() {
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// Create a dummy node (which is not added to allnodes), that adds a reference
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// to the root node, preventing it from being deleted.
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HandleSDNode Dummy(getRoot());
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SmallVector<SDNode*, 128> DeadNodes;
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|
|
|
// Add all obviously-dead nodes to the DeadNodes worklist.
|
|
for (allnodes_iterator I = allnodes_begin(), E = allnodes_end(); I != E; ++I)
|
|
if (I->use_empty())
|
|
DeadNodes.push_back(I);
|
|
|
|
// Process the worklist, deleting the nodes and adding their uses to the
|
|
// worklist.
|
|
while (!DeadNodes.empty()) {
|
|
SDNode *N = DeadNodes.back();
|
|
DeadNodes.pop_back();
|
|
|
|
// Take the node out of the appropriate CSE map.
|
|
RemoveNodeFromCSEMaps(N);
|
|
|
|
// Next, brutally remove the operand list. This is safe to do, as there are
|
|
// no cycles in the graph.
|
|
for (SDNode::op_iterator I = N->op_begin(), E = N->op_end(); I != E; ++I) {
|
|
SDNode *Operand = I->getVal();
|
|
Operand->removeUser(std::distance(N->op_begin(), I), N);
|
|
|
|
// Now that we removed this operand, see if there are no uses of it left.
|
|
if (Operand->use_empty())
|
|
DeadNodes.push_back(Operand);
|
|
}
|
|
if (N->OperandsNeedDelete) {
|
|
delete[] N->OperandList;
|
|
}
|
|
N->OperandList = 0;
|
|
N->NumOperands = 0;
|
|
|
|
// Finally, remove N itself.
|
|
AllNodes.erase(N);
|
|
}
|
|
|
|
// If the root changed (e.g. it was a dead load, update the root).
|
|
setRoot(Dummy.getValue());
|
|
}
|
|
|
|
void SelectionDAG::RemoveDeadNode(SDNode *N, DAGUpdateListener *UpdateListener){
|
|
SmallVector<SDNode*, 16> DeadNodes;
|
|
DeadNodes.push_back(N);
|
|
|
|
// Process the worklist, deleting the nodes and adding their uses to the
|
|
// worklist.
|
|
while (!DeadNodes.empty()) {
|
|
SDNode *N = DeadNodes.back();
|
|
DeadNodes.pop_back();
|
|
|
|
if (UpdateListener)
|
|
UpdateListener->NodeDeleted(N, 0);
|
|
|
|
// Take the node out of the appropriate CSE map.
|
|
RemoveNodeFromCSEMaps(N);
|
|
|
|
// Next, brutally remove the operand list. This is safe to do, as there are
|
|
// no cycles in the graph.
|
|
for (SDNode::op_iterator I = N->op_begin(), E = N->op_end(); I != E; ++I) {
|
|
SDNode *Operand = I->getVal();
|
|
Operand->removeUser(std::distance(N->op_begin(), I), N);
|
|
|
|
// Now that we removed this operand, see if there are no uses of it left.
|
|
if (Operand->use_empty())
|
|
DeadNodes.push_back(Operand);
|
|
}
|
|
if (N->OperandsNeedDelete) {
|
|
delete[] N->OperandList;
|
|
}
|
|
N->OperandList = 0;
|
|
N->NumOperands = 0;
|
|
|
|
// Finally, remove N itself.
|
|
AllNodes.erase(N);
|
|
}
|
|
}
|
|
|
|
void SelectionDAG::DeleteNode(SDNode *N) {
|
|
assert(N->use_empty() && "Cannot delete a node that is not dead!");
|
|
|
|
// First take this out of the appropriate CSE map.
|
|
RemoveNodeFromCSEMaps(N);
|
|
|
|
// Finally, remove uses due to operands of this node, remove from the
|
|
// AllNodes list, and delete the node.
|
|
DeleteNodeNotInCSEMaps(N);
|
|
}
|
|
|
|
void SelectionDAG::DeleteNodeNotInCSEMaps(SDNode *N) {
|
|
|
|
// Remove it from the AllNodes list.
|
|
AllNodes.remove(N);
|
|
|
|
// Drop all of the operands and decrement used nodes use counts.
|
|
for (SDNode::op_iterator I = N->op_begin(), E = N->op_end(); I != E; ++I)
|
|
I->getVal()->removeUser(std::distance(N->op_begin(), I), N);
|
|
if (N->OperandsNeedDelete) {
|
|
delete[] N->OperandList;
|
|
}
|
|
N->OperandList = 0;
|
|
N->NumOperands = 0;
|
|
|
|
delete N;
|
|
}
|
|
|
|
/// RemoveNodeFromCSEMaps - Take the specified node out of the CSE map that
|
|
/// correspond to it. This is useful when we're about to delete or repurpose
|
|
/// the node. We don't want future request for structurally identical nodes
|
|
/// to return N anymore.
|
|
void SelectionDAG::RemoveNodeFromCSEMaps(SDNode *N) {
|
|
bool Erased = false;
|
|
switch (N->getOpcode()) {
|
|
case ISD::HANDLENODE: return; // noop.
|
|
case ISD::STRING:
|
|
Erased = StringNodes.erase(cast<StringSDNode>(N)->getValue());
|
|
break;
|
|
case ISD::CONDCODE:
|
|
assert(CondCodeNodes[cast<CondCodeSDNode>(N)->get()] &&
|
|
"Cond code doesn't exist!");
|
|
Erased = CondCodeNodes[cast<CondCodeSDNode>(N)->get()] != 0;
|
|
CondCodeNodes[cast<CondCodeSDNode>(N)->get()] = 0;
|
|
break;
|
|
case ISD::ExternalSymbol:
|
|
Erased = ExternalSymbols.erase(cast<ExternalSymbolSDNode>(N)->getSymbol());
|
|
break;
|
|
case ISD::TargetExternalSymbol:
|
|
Erased =
|
|
TargetExternalSymbols.erase(cast<ExternalSymbolSDNode>(N)->getSymbol());
|
|
break;
|
|
case ISD::VALUETYPE: {
|
|
MVT VT = cast<VTSDNode>(N)->getVT();
|
|
if (VT.isExtended()) {
|
|
Erased = ExtendedValueTypeNodes.erase(VT);
|
|
} else {
|
|
Erased = ValueTypeNodes[VT.getSimpleVT()] != 0;
|
|
ValueTypeNodes[VT.getSimpleVT()] = 0;
|
|
}
|
|
break;
|
|
}
|
|
default:
|
|
// Remove it from the CSE Map.
|
|
Erased = CSEMap.RemoveNode(N);
|
|
break;
|
|
}
|
|
#ifndef NDEBUG
|
|
// Verify that the node was actually in one of the CSE maps, unless it has a
|
|
// flag result (which cannot be CSE'd) or is one of the special cases that are
|
|
// not subject to CSE.
|
|
if (!Erased && N->getValueType(N->getNumValues()-1) != MVT::Flag &&
|
|
!N->isTargetOpcode()) {
|
|
N->dump(this);
|
|
cerr << "\n";
|
|
assert(0 && "Node is not in map!");
|
|
}
|
|
#endif
|
|
}
|
|
|
|
/// AddNonLeafNodeToCSEMaps - Add the specified node back to the CSE maps. It
|
|
/// has been taken out and modified in some way. If the specified node already
|
|
/// exists in the CSE maps, do not modify the maps, but return the existing node
|
|
/// instead. If it doesn't exist, add it and return null.
|
|
///
|
|
SDNode *SelectionDAG::AddNonLeafNodeToCSEMaps(SDNode *N) {
|
|
assert(N->getNumOperands() && "This is a leaf node!");
|
|
if (N->getOpcode() == ISD::HANDLENODE || N->getValueType(0) == MVT::Flag)
|
|
return 0; // Never add these nodes.
|
|
|
|
// Check that remaining values produced are not flags.
|
|
for (unsigned i = 1, e = N->getNumValues(); i != e; ++i)
|
|
if (N->getValueType(i) == MVT::Flag)
|
|
return 0; // Never CSE anything that produces a flag.
|
|
|
|
SDNode *New = CSEMap.GetOrInsertNode(N);
|
|
if (New != N) return New; // Node already existed.
|
|
return 0;
|
|
}
|
|
|
|
/// FindModifiedNodeSlot - Find a slot for the specified node if its operands
|
|
/// were replaced with those specified. If this node is never memoized,
|
|
/// return null, otherwise return a pointer to the slot it would take. If a
|
|
/// node already exists with these operands, the slot will be non-null.
|
|
SDNode *SelectionDAG::FindModifiedNodeSlot(SDNode *N, SDOperand Op,
|
|
void *&InsertPos) {
|
|
if (N->getOpcode() == ISD::HANDLENODE || N->getValueType(0) == MVT::Flag)
|
|
return 0; // Never add these nodes.
|
|
|
|
// Check that remaining values produced are not flags.
|
|
for (unsigned i = 1, e = N->getNumValues(); i != e; ++i)
|
|
if (N->getValueType(i) == MVT::Flag)
|
|
return 0; // Never CSE anything that produces a flag.
|
|
|
|
SDOperand Ops[] = { Op };
|
|
FoldingSetNodeID ID;
|
|
AddNodeIDNode(ID, N->getOpcode(), N->getVTList(), Ops, 1);
|
|
return CSEMap.FindNodeOrInsertPos(ID, InsertPos);
|
|
}
|
|
|
|
/// FindModifiedNodeSlot - Find a slot for the specified node if its operands
|
|
/// were replaced with those specified. If this node is never memoized,
|
|
/// return null, otherwise return a pointer to the slot it would take. If a
|
|
/// node already exists with these operands, the slot will be non-null.
|
|
SDNode *SelectionDAG::FindModifiedNodeSlot(SDNode *N,
|
|
SDOperand Op1, SDOperand Op2,
|
|
void *&InsertPos) {
|
|
if (N->getOpcode() == ISD::HANDLENODE || N->getValueType(0) == MVT::Flag)
|
|
return 0; // Never add these nodes.
|
|
|
|
// Check that remaining values produced are not flags.
|
|
for (unsigned i = 1, e = N->getNumValues(); i != e; ++i)
|
|
if (N->getValueType(i) == MVT::Flag)
|
|
return 0; // Never CSE anything that produces a flag.
|
|
|
|
SDOperand Ops[] = { Op1, Op2 };
|
|
FoldingSetNodeID ID;
|
|
AddNodeIDNode(ID, N->getOpcode(), N->getVTList(), Ops, 2);
|
|
return CSEMap.FindNodeOrInsertPos(ID, InsertPos);
|
|
}
|
|
|
|
|
|
/// FindModifiedNodeSlot - Find a slot for the specified node if its operands
|
|
/// were replaced with those specified. If this node is never memoized,
|
|
/// return null, otherwise return a pointer to the slot it would take. If a
|
|
/// node already exists with these operands, the slot will be non-null.
|
|
SDNode *SelectionDAG::FindModifiedNodeSlot(SDNode *N,
|
|
SDOperandPtr Ops,unsigned NumOps,
|
|
void *&InsertPos) {
|
|
if (N->getOpcode() == ISD::HANDLENODE || N->getValueType(0) == MVT::Flag)
|
|
return 0; // Never add these nodes.
|
|
|
|
// Check that remaining values produced are not flags.
|
|
for (unsigned i = 1, e = N->getNumValues(); i != e; ++i)
|
|
if (N->getValueType(i) == MVT::Flag)
|
|
return 0; // Never CSE anything that produces a flag.
|
|
|
|
FoldingSetNodeID ID;
|
|
AddNodeIDNode(ID, N->getOpcode(), N->getVTList(), Ops, NumOps);
|
|
|
|
if (const LoadSDNode *LD = dyn_cast<LoadSDNode>(N)) {
|
|
ID.AddInteger(LD->getAddressingMode());
|
|
ID.AddInteger(LD->getExtensionType());
|
|
ID.AddInteger(LD->getMemoryVT().getRawBits());
|
|
ID.AddInteger(LD->getAlignment());
|
|
ID.AddInteger(LD->isVolatile());
|
|
} else if (const StoreSDNode *ST = dyn_cast<StoreSDNode>(N)) {
|
|
ID.AddInteger(ST->getAddressingMode());
|
|
ID.AddInteger(ST->isTruncatingStore());
|
|
ID.AddInteger(ST->getMemoryVT().getRawBits());
|
|
ID.AddInteger(ST->getAlignment());
|
|
ID.AddInteger(ST->isVolatile());
|
|
}
|
|
|
|
return CSEMap.FindNodeOrInsertPos(ID, InsertPos);
|
|
}
|
|
|
|
|
|
SelectionDAG::~SelectionDAG() {
|
|
while (!AllNodes.empty()) {
|
|
SDNode *N = AllNodes.begin();
|
|
N->SetNextInBucket(0);
|
|
if (N->OperandsNeedDelete) {
|
|
delete [] N->OperandList;
|
|
}
|
|
N->OperandList = 0;
|
|
N->NumOperands = 0;
|
|
AllNodes.pop_front();
|
|
}
|
|
}
|
|
|
|
SDOperand SelectionDAG::getZeroExtendInReg(SDOperand Op, MVT VT) {
|
|
if (Op.getValueType() == VT) return Op;
|
|
APInt Imm = APInt::getLowBitsSet(Op.getValueSizeInBits(),
|
|
VT.getSizeInBits());
|
|
return getNode(ISD::AND, Op.getValueType(), Op,
|
|
getConstant(Imm, Op.getValueType()));
|
|
}
|
|
|
|
SDOperand SelectionDAG::getString(const std::string &Val) {
|
|
StringSDNode *&N = StringNodes[Val];
|
|
if (!N) {
|
|
N = new StringSDNode(Val);
|
|
AllNodes.push_back(N);
|
|
}
|
|
return SDOperand(N, 0);
|
|
}
|
|
|
|
SDOperand SelectionDAG::getConstant(uint64_t Val, MVT VT, bool isT) {
|
|
MVT EltVT =
|
|
VT.isVector() ? VT.getVectorElementType() : VT;
|
|
|
|
return getConstant(APInt(EltVT.getSizeInBits(), Val), VT, isT);
|
|
}
|
|
|
|
SDOperand SelectionDAG::getConstant(const APInt &Val, MVT VT, bool isT) {
|
|
assert(VT.isInteger() && "Cannot create FP integer constant!");
|
|
|
|
MVT EltVT =
|
|
VT.isVector() ? VT.getVectorElementType() : VT;
|
|
|
|
assert(Val.getBitWidth() == EltVT.getSizeInBits() &&
|
|
"APInt size does not match type size!");
|
|
|
|
unsigned Opc = isT ? ISD::TargetConstant : ISD::Constant;
|
|
FoldingSetNodeID ID;
|
|
AddNodeIDNode(ID, Opc, getVTList(EltVT), (SDOperand*)0, 0);
|
|
ID.Add(Val);
|
|
void *IP = 0;
|
|
SDNode *N = NULL;
|
|
if ((N = CSEMap.FindNodeOrInsertPos(ID, IP)))
|
|
if (!VT.isVector())
|
|
return SDOperand(N, 0);
|
|
if (!N) {
|
|
N = new ConstantSDNode(isT, Val, EltVT);
|
|
CSEMap.InsertNode(N, IP);
|
|
AllNodes.push_back(N);
|
|
}
|
|
|
|
SDOperand Result(N, 0);
|
|
if (VT.isVector()) {
|
|
SmallVector<SDOperand, 8> Ops;
|
|
Ops.assign(VT.getVectorNumElements(), Result);
|
|
Result = getNode(ISD::BUILD_VECTOR, VT, &Ops[0], Ops.size());
|
|
}
|
|
return Result;
|
|
}
|
|
|
|
SDOperand SelectionDAG::getIntPtrConstant(uint64_t Val, bool isTarget) {
|
|
return getConstant(Val, TLI.getPointerTy(), isTarget);
|
|
}
|
|
|
|
|
|
SDOperand SelectionDAG::getConstantFP(const APFloat& V, MVT VT, bool isTarget) {
|
|
assert(VT.isFloatingPoint() && "Cannot create integer FP constant!");
|
|
|
|
MVT EltVT =
|
|
VT.isVector() ? VT.getVectorElementType() : VT;
|
|
|
|
// Do the map lookup using the actual bit pattern for the floating point
|
|
// value, so that we don't have problems with 0.0 comparing equal to -0.0, and
|
|
// we don't have issues with SNANs.
|
|
unsigned Opc = isTarget ? ISD::TargetConstantFP : ISD::ConstantFP;
|
|
FoldingSetNodeID ID;
|
|
AddNodeIDNode(ID, Opc, getVTList(EltVT), (SDOperand*)0, 0);
|
|
ID.Add(V);
|
|
void *IP = 0;
|
|
SDNode *N = NULL;
|
|
if ((N = CSEMap.FindNodeOrInsertPos(ID, IP)))
|
|
if (!VT.isVector())
|
|
return SDOperand(N, 0);
|
|
if (!N) {
|
|
N = new ConstantFPSDNode(isTarget, V, EltVT);
|
|
CSEMap.InsertNode(N, IP);
|
|
AllNodes.push_back(N);
|
|
}
|
|
|
|
SDOperand Result(N, 0);
|
|
if (VT.isVector()) {
|
|
SmallVector<SDOperand, 8> Ops;
|
|
Ops.assign(VT.getVectorNumElements(), Result);
|
|
Result = getNode(ISD::BUILD_VECTOR, VT, &Ops[0], Ops.size());
|
|
}
|
|
return Result;
|
|
}
|
|
|
|
SDOperand SelectionDAG::getConstantFP(double Val, MVT VT, bool isTarget) {
|
|
MVT EltVT =
|
|
VT.isVector() ? VT.getVectorElementType() : VT;
|
|
if (EltVT==MVT::f32)
|
|
return getConstantFP(APFloat((float)Val), VT, isTarget);
|
|
else
|
|
return getConstantFP(APFloat(Val), VT, isTarget);
|
|
}
|
|
|
|
SDOperand SelectionDAG::getGlobalAddress(const GlobalValue *GV,
|
|
MVT VT, int Offset,
|
|
bool isTargetGA) {
|
|
unsigned Opc;
|
|
|
|
const GlobalVariable *GVar = dyn_cast<GlobalVariable>(GV);
|
|
if (!GVar) {
|
|
// If GV is an alias then use the aliasee for determining thread-localness.
|
|
if (const GlobalAlias *GA = dyn_cast<GlobalAlias>(GV))
|
|
GVar = dyn_cast_or_null<GlobalVariable>(GA->resolveAliasedGlobal());
|
|
}
|
|
|
|
if (GVar && GVar->isThreadLocal())
|
|
Opc = isTargetGA ? ISD::TargetGlobalTLSAddress : ISD::GlobalTLSAddress;
|
|
else
|
|
Opc = isTargetGA ? ISD::TargetGlobalAddress : ISD::GlobalAddress;
|
|
|
|
FoldingSetNodeID ID;
|
|
AddNodeIDNode(ID, Opc, getVTList(VT), (SDOperand*)0, 0);
|
|
ID.AddPointer(GV);
|
|
ID.AddInteger(Offset);
|
|
void *IP = 0;
|
|
if (SDNode *E = CSEMap.FindNodeOrInsertPos(ID, IP))
|
|
return SDOperand(E, 0);
|
|
SDNode *N = new GlobalAddressSDNode(isTargetGA, GV, VT, Offset);
|
|
CSEMap.InsertNode(N, IP);
|
|
AllNodes.push_back(N);
|
|
return SDOperand(N, 0);
|
|
}
|
|
|
|
SDOperand SelectionDAG::getFrameIndex(int FI, MVT VT, bool isTarget) {
|
|
unsigned Opc = isTarget ? ISD::TargetFrameIndex : ISD::FrameIndex;
|
|
FoldingSetNodeID ID;
|
|
AddNodeIDNode(ID, Opc, getVTList(VT), (SDOperand*)0, 0);
|
|
ID.AddInteger(FI);
|
|
void *IP = 0;
|
|
if (SDNode *E = CSEMap.FindNodeOrInsertPos(ID, IP))
|
|
return SDOperand(E, 0);
|
|
SDNode *N = new FrameIndexSDNode(FI, VT, isTarget);
|
|
CSEMap.InsertNode(N, IP);
|
|
AllNodes.push_back(N);
|
|
return SDOperand(N, 0);
|
|
}
|
|
|
|
SDOperand SelectionDAG::getJumpTable(int JTI, MVT VT, bool isTarget){
|
|
unsigned Opc = isTarget ? ISD::TargetJumpTable : ISD::JumpTable;
|
|
FoldingSetNodeID ID;
|
|
AddNodeIDNode(ID, Opc, getVTList(VT), (SDOperand*)0, 0);
|
|
ID.AddInteger(JTI);
|
|
void *IP = 0;
|
|
if (SDNode *E = CSEMap.FindNodeOrInsertPos(ID, IP))
|
|
return SDOperand(E, 0);
|
|
SDNode *N = new JumpTableSDNode(JTI, VT, isTarget);
|
|
CSEMap.InsertNode(N, IP);
|
|
AllNodes.push_back(N);
|
|
return SDOperand(N, 0);
|
|
}
|
|
|
|
SDOperand SelectionDAG::getConstantPool(Constant *C, MVT VT,
|
|
unsigned Alignment, int Offset,
|
|
bool isTarget) {
|
|
unsigned Opc = isTarget ? ISD::TargetConstantPool : ISD::ConstantPool;
|
|
FoldingSetNodeID ID;
|
|
AddNodeIDNode(ID, Opc, getVTList(VT), (SDOperand*)0, 0);
|
|
ID.AddInteger(Alignment);
|
|
ID.AddInteger(Offset);
|
|
ID.AddPointer(C);
|
|
void *IP = 0;
|
|
if (SDNode *E = CSEMap.FindNodeOrInsertPos(ID, IP))
|
|
return SDOperand(E, 0);
|
|
SDNode *N = new ConstantPoolSDNode(isTarget, C, VT, Offset, Alignment);
|
|
CSEMap.InsertNode(N, IP);
|
|
AllNodes.push_back(N);
|
|
return SDOperand(N, 0);
|
|
}
|
|
|
|
|
|
SDOperand SelectionDAG::getConstantPool(MachineConstantPoolValue *C, MVT VT,
|
|
unsigned Alignment, int Offset,
|
|
bool isTarget) {
|
|
unsigned Opc = isTarget ? ISD::TargetConstantPool : ISD::ConstantPool;
|
|
FoldingSetNodeID ID;
|
|
AddNodeIDNode(ID, Opc, getVTList(VT), (SDOperand*)0, 0);
|
|
ID.AddInteger(Alignment);
|
|
ID.AddInteger(Offset);
|
|
C->AddSelectionDAGCSEId(ID);
|
|
void *IP = 0;
|
|
if (SDNode *E = CSEMap.FindNodeOrInsertPos(ID, IP))
|
|
return SDOperand(E, 0);
|
|
SDNode *N = new ConstantPoolSDNode(isTarget, C, VT, Offset, Alignment);
|
|
CSEMap.InsertNode(N, IP);
|
|
AllNodes.push_back(N);
|
|
return SDOperand(N, 0);
|
|
}
|
|
|
|
|
|
SDOperand SelectionDAG::getBasicBlock(MachineBasicBlock *MBB) {
|
|
FoldingSetNodeID ID;
|
|
AddNodeIDNode(ID, ISD::BasicBlock, getVTList(MVT::Other), (SDOperand*)0, 0);
|
|
ID.AddPointer(MBB);
|
|
void *IP = 0;
|
|
if (SDNode *E = CSEMap.FindNodeOrInsertPos(ID, IP))
|
|
return SDOperand(E, 0);
|
|
SDNode *N = new BasicBlockSDNode(MBB);
|
|
CSEMap.InsertNode(N, IP);
|
|
AllNodes.push_back(N);
|
|
return SDOperand(N, 0);
|
|
}
|
|
|
|
SDOperand SelectionDAG::getArgFlags(ISD::ArgFlagsTy Flags) {
|
|
FoldingSetNodeID ID;
|
|
AddNodeIDNode(ID, ISD::ARG_FLAGS, getVTList(MVT::Other), (SDOperand*)0, 0);
|
|
ID.AddInteger(Flags.getRawBits());
|
|
void *IP = 0;
|
|
if (SDNode *E = CSEMap.FindNodeOrInsertPos(ID, IP))
|
|
return SDOperand(E, 0);
|
|
SDNode *N = new ARG_FLAGSSDNode(Flags);
|
|
CSEMap.InsertNode(N, IP);
|
|
AllNodes.push_back(N);
|
|
return SDOperand(N, 0);
|
|
}
|
|
|
|
SDOperand SelectionDAG::getValueType(MVT VT) {
|
|
if (VT.isSimple() && (unsigned)VT.getSimpleVT() >= ValueTypeNodes.size())
|
|
ValueTypeNodes.resize(VT.getSimpleVT()+1);
|
|
|
|
SDNode *&N = VT.isExtended() ?
|
|
ExtendedValueTypeNodes[VT] : ValueTypeNodes[VT.getSimpleVT()];
|
|
|
|
if (N) return SDOperand(N, 0);
|
|
N = new VTSDNode(VT);
|
|
AllNodes.push_back(N);
|
|
return SDOperand(N, 0);
|
|
}
|
|
|
|
SDOperand SelectionDAG::getExternalSymbol(const char *Sym, MVT VT) {
|
|
SDNode *&N = ExternalSymbols[Sym];
|
|
if (N) return SDOperand(N, 0);
|
|
N = new ExternalSymbolSDNode(false, Sym, VT);
|
|
AllNodes.push_back(N);
|
|
return SDOperand(N, 0);
|
|
}
|
|
|
|
SDOperand SelectionDAG::getTargetExternalSymbol(const char *Sym, MVT VT) {
|
|
SDNode *&N = TargetExternalSymbols[Sym];
|
|
if (N) return SDOperand(N, 0);
|
|
N = new ExternalSymbolSDNode(true, Sym, VT);
|
|
AllNodes.push_back(N);
|
|
return SDOperand(N, 0);
|
|
}
|
|
|
|
SDOperand SelectionDAG::getCondCode(ISD::CondCode Cond) {
|
|
if ((unsigned)Cond >= CondCodeNodes.size())
|
|
CondCodeNodes.resize(Cond+1);
|
|
|
|
if (CondCodeNodes[Cond] == 0) {
|
|
CondCodeNodes[Cond] = new CondCodeSDNode(Cond);
|
|
AllNodes.push_back(CondCodeNodes[Cond]);
|
|
}
|
|
return SDOperand(CondCodeNodes[Cond], 0);
|
|
}
|
|
|
|
SDOperand SelectionDAG::getRegister(unsigned RegNo, MVT VT) {
|
|
FoldingSetNodeID ID;
|
|
AddNodeIDNode(ID, ISD::Register, getVTList(VT), (SDOperand*)0, 0);
|
|
ID.AddInteger(RegNo);
|
|
void *IP = 0;
|
|
if (SDNode *E = CSEMap.FindNodeOrInsertPos(ID, IP))
|
|
return SDOperand(E, 0);
|
|
SDNode *N = new RegisterSDNode(RegNo, VT);
|
|
CSEMap.InsertNode(N, IP);
|
|
AllNodes.push_back(N);
|
|
return SDOperand(N, 0);
|
|
}
|
|
|
|
SDOperand SelectionDAG::getSrcValue(const Value *V) {
|
|
assert((!V || isa<PointerType>(V->getType())) &&
|
|
"SrcValue is not a pointer?");
|
|
|
|
FoldingSetNodeID ID;
|
|
AddNodeIDNode(ID, ISD::SRCVALUE, getVTList(MVT::Other), (SDOperand*)0, 0);
|
|
ID.AddPointer(V);
|
|
|
|
void *IP = 0;
|
|
if (SDNode *E = CSEMap.FindNodeOrInsertPos(ID, IP))
|
|
return SDOperand(E, 0);
|
|
|
|
SDNode *N = new SrcValueSDNode(V);
|
|
CSEMap.InsertNode(N, IP);
|
|
AllNodes.push_back(N);
|
|
return SDOperand(N, 0);
|
|
}
|
|
|
|
SDOperand SelectionDAG::getMemOperand(const MachineMemOperand &MO) {
|
|
const Value *v = MO.getValue();
|
|
assert((!v || isa<PointerType>(v->getType())) &&
|
|
"SrcValue is not a pointer?");
|
|
|
|
FoldingSetNodeID ID;
|
|
AddNodeIDNode(ID, ISD::MEMOPERAND, getVTList(MVT::Other), (SDOperand*)0, 0);
|
|
ID.AddPointer(v);
|
|
ID.AddInteger(MO.getFlags());
|
|
ID.AddInteger(MO.getOffset());
|
|
ID.AddInteger(MO.getSize());
|
|
ID.AddInteger(MO.getAlignment());
|
|
|
|
void *IP = 0;
|
|
if (SDNode *E = CSEMap.FindNodeOrInsertPos(ID, IP))
|
|
return SDOperand(E, 0);
|
|
|
|
SDNode *N = new MemOperandSDNode(MO);
|
|
CSEMap.InsertNode(N, IP);
|
|
AllNodes.push_back(N);
|
|
return SDOperand(N, 0);
|
|
}
|
|
|
|
/// CreateStackTemporary - Create a stack temporary, suitable for holding the
|
|
/// specified value type.
|
|
SDOperand SelectionDAG::CreateStackTemporary(MVT VT) {
|
|
MachineFrameInfo *FrameInfo = getMachineFunction().getFrameInfo();
|
|
unsigned ByteSize = VT.getSizeInBits()/8;
|
|
const Type *Ty = VT.getTypeForMVT();
|
|
unsigned StackAlign = (unsigned)TLI.getTargetData()->getPrefTypeAlignment(Ty);
|
|
int FrameIdx = FrameInfo->CreateStackObject(ByteSize, StackAlign);
|
|
return getFrameIndex(FrameIdx, TLI.getPointerTy());
|
|
}
|
|
|
|
|
|
SDOperand SelectionDAG::FoldSetCC(MVT VT, SDOperand N1,
|
|
SDOperand N2, ISD::CondCode Cond) {
|
|
// These setcc operations always fold.
|
|
switch (Cond) {
|
|
default: break;
|
|
case ISD::SETFALSE:
|
|
case ISD::SETFALSE2: return getConstant(0, VT);
|
|
case ISD::SETTRUE:
|
|
case ISD::SETTRUE2: return getConstant(1, VT);
|
|
|
|
case ISD::SETOEQ:
|
|
case ISD::SETOGT:
|
|
case ISD::SETOGE:
|
|
case ISD::SETOLT:
|
|
case ISD::SETOLE:
|
|
case ISD::SETONE:
|
|
case ISD::SETO:
|
|
case ISD::SETUO:
|
|
case ISD::SETUEQ:
|
|
case ISD::SETUNE:
|
|
assert(!N1.getValueType().isInteger() && "Illegal setcc for integer!");
|
|
break;
|
|
}
|
|
|
|
if (ConstantSDNode *N2C = dyn_cast<ConstantSDNode>(N2.Val)) {
|
|
const APInt &C2 = N2C->getAPIntValue();
|
|
if (ConstantSDNode *N1C = dyn_cast<ConstantSDNode>(N1.Val)) {
|
|
const APInt &C1 = N1C->getAPIntValue();
|
|
|
|
switch (Cond) {
|
|
default: assert(0 && "Unknown integer setcc!");
|
|
case ISD::SETEQ: return getConstant(C1 == C2, VT);
|
|
case ISD::SETNE: return getConstant(C1 != C2, VT);
|
|
case ISD::SETULT: return getConstant(C1.ult(C2), VT);
|
|
case ISD::SETUGT: return getConstant(C1.ugt(C2), VT);
|
|
case ISD::SETULE: return getConstant(C1.ule(C2), VT);
|
|
case ISD::SETUGE: return getConstant(C1.uge(C2), VT);
|
|
case ISD::SETLT: return getConstant(C1.slt(C2), VT);
|
|
case ISD::SETGT: return getConstant(C1.sgt(C2), VT);
|
|
case ISD::SETLE: return getConstant(C1.sle(C2), VT);
|
|
case ISD::SETGE: return getConstant(C1.sge(C2), VT);
|
|
}
|
|
}
|
|
}
|
|
if (ConstantFPSDNode *N1C = dyn_cast<ConstantFPSDNode>(N1.Val)) {
|
|
if (ConstantFPSDNode *N2C = dyn_cast<ConstantFPSDNode>(N2.Val)) {
|
|
// No compile time operations on this type yet.
|
|
if (N1C->getValueType(0) == MVT::ppcf128)
|
|
return SDOperand();
|
|
|
|
APFloat::cmpResult R = N1C->getValueAPF().compare(N2C->getValueAPF());
|
|
switch (Cond) {
|
|
default: break;
|
|
case ISD::SETEQ: if (R==APFloat::cmpUnordered)
|
|
return getNode(ISD::UNDEF, VT);
|
|
// fall through
|
|
case ISD::SETOEQ: return getConstant(R==APFloat::cmpEqual, VT);
|
|
case ISD::SETNE: if (R==APFloat::cmpUnordered)
|
|
return getNode(ISD::UNDEF, VT);
|
|
// fall through
|
|
case ISD::SETONE: return getConstant(R==APFloat::cmpGreaterThan ||
|
|
R==APFloat::cmpLessThan, VT);
|
|
case ISD::SETLT: if (R==APFloat::cmpUnordered)
|
|
return getNode(ISD::UNDEF, VT);
|
|
// fall through
|
|
case ISD::SETOLT: return getConstant(R==APFloat::cmpLessThan, VT);
|
|
case ISD::SETGT: if (R==APFloat::cmpUnordered)
|
|
return getNode(ISD::UNDEF, VT);
|
|
// fall through
|
|
case ISD::SETOGT: return getConstant(R==APFloat::cmpGreaterThan, VT);
|
|
case ISD::SETLE: if (R==APFloat::cmpUnordered)
|
|
return getNode(ISD::UNDEF, VT);
|
|
// fall through
|
|
case ISD::SETOLE: return getConstant(R==APFloat::cmpLessThan ||
|
|
R==APFloat::cmpEqual, VT);
|
|
case ISD::SETGE: if (R==APFloat::cmpUnordered)
|
|
return getNode(ISD::UNDEF, VT);
|
|
// fall through
|
|
case ISD::SETOGE: return getConstant(R==APFloat::cmpGreaterThan ||
|
|
R==APFloat::cmpEqual, VT);
|
|
case ISD::SETO: return getConstant(R!=APFloat::cmpUnordered, VT);
|
|
case ISD::SETUO: return getConstant(R==APFloat::cmpUnordered, VT);
|
|
case ISD::SETUEQ: return getConstant(R==APFloat::cmpUnordered ||
|
|
R==APFloat::cmpEqual, VT);
|
|
case ISD::SETUNE: return getConstant(R!=APFloat::cmpEqual, VT);
|
|
case ISD::SETULT: return getConstant(R==APFloat::cmpUnordered ||
|
|
R==APFloat::cmpLessThan, VT);
|
|
case ISD::SETUGT: return getConstant(R==APFloat::cmpGreaterThan ||
|
|
R==APFloat::cmpUnordered, VT);
|
|
case ISD::SETULE: return getConstant(R!=APFloat::cmpGreaterThan, VT);
|
|
case ISD::SETUGE: return getConstant(R!=APFloat::cmpLessThan, VT);
|
|
}
|
|
} else {
|
|
// Ensure that the constant occurs on the RHS.
|
|
return getSetCC(VT, N2, N1, ISD::getSetCCSwappedOperands(Cond));
|
|
}
|
|
}
|
|
|
|
// Could not fold it.
|
|
return SDOperand();
|
|
}
|
|
|
|
/// SignBitIsZero - Return true if the sign bit of Op is known to be zero. We
|
|
/// use this predicate to simplify operations downstream.
|
|
bool SelectionDAG::SignBitIsZero(SDOperand Op, unsigned Depth) const {
|
|
unsigned BitWidth = Op.getValueSizeInBits();
|
|
return MaskedValueIsZero(Op, APInt::getSignBit(BitWidth), Depth);
|
|
}
|
|
|
|
/// MaskedValueIsZero - Return true if 'V & Mask' is known to be zero. We use
|
|
/// this predicate to simplify operations downstream. Mask is known to be zero
|
|
/// for bits that V cannot have.
|
|
bool SelectionDAG::MaskedValueIsZero(SDOperand Op, const APInt &Mask,
|
|
unsigned Depth) const {
|
|
APInt KnownZero, KnownOne;
|
|
ComputeMaskedBits(Op, Mask, KnownZero, KnownOne, Depth);
|
|
assert((KnownZero & KnownOne) == 0 && "Bits known to be one AND zero?");
|
|
return (KnownZero & Mask) == Mask;
|
|
}
|
|
|
|
/// ComputeMaskedBits - Determine which of the bits specified in Mask are
|
|
/// known to be either zero or one and return them in the KnownZero/KnownOne
|
|
/// bitsets. This code only analyzes bits in Mask, in order to short-circuit
|
|
/// processing.
|
|
void SelectionDAG::ComputeMaskedBits(SDOperand Op, const APInt &Mask,
|
|
APInt &KnownZero, APInt &KnownOne,
|
|
unsigned Depth) const {
|
|
unsigned BitWidth = Mask.getBitWidth();
|
|
assert(BitWidth == Op.getValueType().getSizeInBits() &&
|
|
"Mask size mismatches value type size!");
|
|
|
|
KnownZero = KnownOne = APInt(BitWidth, 0); // Don't know anything.
|
|
if (Depth == 6 || Mask == 0)
|
|
return; // Limit search depth.
|
|
|
|
APInt KnownZero2, KnownOne2;
|
|
|
|
switch (Op.getOpcode()) {
|
|
case ISD::Constant:
|
|
// We know all of the bits for a constant!
|
|
KnownOne = cast<ConstantSDNode>(Op)->getAPIntValue() & Mask;
|
|
KnownZero = ~KnownOne & Mask;
|
|
return;
|
|
case ISD::AND:
|
|
// If either the LHS or the RHS are Zero, the result is zero.
|
|
ComputeMaskedBits(Op.getOperand(1), Mask, KnownZero, KnownOne, Depth+1);
|
|
ComputeMaskedBits(Op.getOperand(0), Mask & ~KnownZero,
|
|
KnownZero2, KnownOne2, Depth+1);
|
|
assert((KnownZero & KnownOne) == 0 && "Bits known to be one AND zero?");
|
|
assert((KnownZero2 & KnownOne2) == 0 && "Bits known to be one AND zero?");
|
|
|
|
// Output known-1 bits are only known if set in both the LHS & RHS.
|
|
KnownOne &= KnownOne2;
|
|
// Output known-0 are known to be clear if zero in either the LHS | RHS.
|
|
KnownZero |= KnownZero2;
|
|
return;
|
|
case ISD::OR:
|
|
ComputeMaskedBits(Op.getOperand(1), Mask, KnownZero, KnownOne, Depth+1);
|
|
ComputeMaskedBits(Op.getOperand(0), Mask & ~KnownOne,
|
|
KnownZero2, KnownOne2, Depth+1);
|
|
assert((KnownZero & KnownOne) == 0 && "Bits known to be one AND zero?");
|
|
assert((KnownZero2 & KnownOne2) == 0 && "Bits known to be one AND zero?");
|
|
|
|
// Output known-0 bits are only known if clear in both the LHS & RHS.
|
|
KnownZero &= KnownZero2;
|
|
// Output known-1 are known to be set if set in either the LHS | RHS.
|
|
KnownOne |= KnownOne2;
|
|
return;
|
|
case ISD::XOR: {
|
|
ComputeMaskedBits(Op.getOperand(1), Mask, KnownZero, KnownOne, Depth+1);
|
|
ComputeMaskedBits(Op.getOperand(0), Mask, KnownZero2, KnownOne2, Depth+1);
|
|
assert((KnownZero & KnownOne) == 0 && "Bits known to be one AND zero?");
|
|
assert((KnownZero2 & KnownOne2) == 0 && "Bits known to be one AND zero?");
|
|
|
|
// Output known-0 bits are known if clear or set in both the LHS & RHS.
|
|
APInt KnownZeroOut = (KnownZero & KnownZero2) | (KnownOne & KnownOne2);
|
|
// Output known-1 are known to be set if set in only one of the LHS, RHS.
|
|
KnownOne = (KnownZero & KnownOne2) | (KnownOne & KnownZero2);
|
|
KnownZero = KnownZeroOut;
|
|
return;
|
|
}
|
|
case ISD::MUL: {
|
|
APInt Mask2 = APInt::getAllOnesValue(BitWidth);
|
|
ComputeMaskedBits(Op.getOperand(1), Mask2, KnownZero, KnownOne, Depth+1);
|
|
ComputeMaskedBits(Op.getOperand(0), Mask2, KnownZero2, KnownOne2, Depth+1);
|
|
assert((KnownZero & KnownOne) == 0 && "Bits known to be one AND zero?");
|
|
assert((KnownZero2 & KnownOne2) == 0 && "Bits known to be one AND zero?");
|
|
|
|
// If low bits are zero in either operand, output low known-0 bits.
|
|
// Also compute a conserative estimate for high known-0 bits.
|
|
// More trickiness is possible, but this is sufficient for the
|
|
// interesting case of alignment computation.
|
|
KnownOne.clear();
|
|
unsigned TrailZ = KnownZero.countTrailingOnes() +
|
|
KnownZero2.countTrailingOnes();
|
|
unsigned LeadZ = std::max(KnownZero.countLeadingOnes() +
|
|
KnownZero2.countLeadingOnes(),
|
|
BitWidth) - BitWidth;
|
|
|
|
TrailZ = std::min(TrailZ, BitWidth);
|
|
LeadZ = std::min(LeadZ, BitWidth);
|
|
KnownZero = APInt::getLowBitsSet(BitWidth, TrailZ) |
|
|
APInt::getHighBitsSet(BitWidth, LeadZ);
|
|
KnownZero &= Mask;
|
|
return;
|
|
}
|
|
case ISD::UDIV: {
|
|
// For the purposes of computing leading zeros we can conservatively
|
|
// treat a udiv as a logical right shift by the power of 2 known to
|
|
// be less than the denominator.
|
|
APInt AllOnes = APInt::getAllOnesValue(BitWidth);
|
|
ComputeMaskedBits(Op.getOperand(0),
|
|
AllOnes, KnownZero2, KnownOne2, Depth+1);
|
|
unsigned LeadZ = KnownZero2.countLeadingOnes();
|
|
|
|
KnownOne2.clear();
|
|
KnownZero2.clear();
|
|
ComputeMaskedBits(Op.getOperand(1),
|
|
AllOnes, KnownZero2, KnownOne2, Depth+1);
|
|
unsigned RHSUnknownLeadingOnes = KnownOne2.countLeadingZeros();
|
|
if (RHSUnknownLeadingOnes != BitWidth)
|
|
LeadZ = std::min(BitWidth,
|
|
LeadZ + BitWidth - RHSUnknownLeadingOnes - 1);
|
|
|
|
KnownZero = APInt::getHighBitsSet(BitWidth, LeadZ) & Mask;
|
|
return;
|
|
}
|
|
case ISD::SELECT:
|
|
ComputeMaskedBits(Op.getOperand(2), Mask, KnownZero, KnownOne, Depth+1);
|
|
ComputeMaskedBits(Op.getOperand(1), Mask, KnownZero2, KnownOne2, Depth+1);
|
|
assert((KnownZero & KnownOne) == 0 && "Bits known to be one AND zero?");
|
|
assert((KnownZero2 & KnownOne2) == 0 && "Bits known to be one AND zero?");
|
|
|
|
// Only known if known in both the LHS and RHS.
|
|
KnownOne &= KnownOne2;
|
|
KnownZero &= KnownZero2;
|
|
return;
|
|
case ISD::SELECT_CC:
|
|
ComputeMaskedBits(Op.getOperand(3), Mask, KnownZero, KnownOne, Depth+1);
|
|
ComputeMaskedBits(Op.getOperand(2), Mask, KnownZero2, KnownOne2, Depth+1);
|
|
assert((KnownZero & KnownOne) == 0 && "Bits known to be one AND zero?");
|
|
assert((KnownZero2 & KnownOne2) == 0 && "Bits known to be one AND zero?");
|
|
|
|
// Only known if known in both the LHS and RHS.
|
|
KnownOne &= KnownOne2;
|
|
KnownZero &= KnownZero2;
|
|
return;
|
|
case ISD::SETCC:
|
|
// If we know the result of a setcc has the top bits zero, use this info.
|
|
if (TLI.getSetCCResultContents() == TargetLowering::ZeroOrOneSetCCResult &&
|
|
BitWidth > 1)
|
|
KnownZero |= APInt::getHighBitsSet(BitWidth, BitWidth - 1);
|
|
return;
|
|
case ISD::SHL:
|
|
// (shl X, C1) & C2 == 0 iff (X & C2 >>u C1) == 0
|
|
if (ConstantSDNode *SA = dyn_cast<ConstantSDNode>(Op.getOperand(1))) {
|
|
unsigned ShAmt = SA->getValue();
|
|
|
|
// If the shift count is an invalid immediate, don't do anything.
|
|
if (ShAmt >= BitWidth)
|
|
return;
|
|
|
|
ComputeMaskedBits(Op.getOperand(0), Mask.lshr(ShAmt),
|
|
KnownZero, KnownOne, Depth+1);
|
|
assert((KnownZero & KnownOne) == 0 && "Bits known to be one AND zero?");
|
|
KnownZero <<= ShAmt;
|
|
KnownOne <<= ShAmt;
|
|
// low bits known zero.
|
|
KnownZero |= APInt::getLowBitsSet(BitWidth, ShAmt);
|
|
}
|
|
return;
|
|
case ISD::SRL:
|
|
// (ushr X, C1) & C2 == 0 iff (-1 >> C1) & C2 == 0
|
|
if (ConstantSDNode *SA = dyn_cast<ConstantSDNode>(Op.getOperand(1))) {
|
|
unsigned ShAmt = SA->getValue();
|
|
|
|
// If the shift count is an invalid immediate, don't do anything.
|
|
if (ShAmt >= BitWidth)
|
|
return;
|
|
|
|
ComputeMaskedBits(Op.getOperand(0), (Mask << ShAmt),
|
|
KnownZero, KnownOne, Depth+1);
|
|
assert((KnownZero & KnownOne) == 0 && "Bits known to be one AND zero?");
|
|
KnownZero = KnownZero.lshr(ShAmt);
|
|
KnownOne = KnownOne.lshr(ShAmt);
|
|
|
|
APInt HighBits = APInt::getHighBitsSet(BitWidth, ShAmt) & Mask;
|
|
KnownZero |= HighBits; // High bits known zero.
|
|
}
|
|
return;
|
|
case ISD::SRA:
|
|
if (ConstantSDNode *SA = dyn_cast<ConstantSDNode>(Op.getOperand(1))) {
|
|
unsigned ShAmt = SA->getValue();
|
|
|
|
// If the shift count is an invalid immediate, don't do anything.
|
|
if (ShAmt >= BitWidth)
|
|
return;
|
|
|
|
APInt InDemandedMask = (Mask << ShAmt);
|
|
// If any of the demanded bits are produced by the sign extension, we also
|
|
// demand the input sign bit.
|
|
APInt HighBits = APInt::getHighBitsSet(BitWidth, ShAmt) & Mask;
|
|
if (HighBits.getBoolValue())
|
|
InDemandedMask |= APInt::getSignBit(BitWidth);
|
|
|
|
ComputeMaskedBits(Op.getOperand(0), InDemandedMask, KnownZero, KnownOne,
|
|
Depth+1);
|
|
assert((KnownZero & KnownOne) == 0 && "Bits known to be one AND zero?");
|
|
KnownZero = KnownZero.lshr(ShAmt);
|
|
KnownOne = KnownOne.lshr(ShAmt);
|
|
|
|
// Handle the sign bits.
|
|
APInt SignBit = APInt::getSignBit(BitWidth);
|
|
SignBit = SignBit.lshr(ShAmt); // Adjust to where it is now in the mask.
|
|
|
|
if (KnownZero.intersects(SignBit)) {
|
|
KnownZero |= HighBits; // New bits are known zero.
|
|
} else if (KnownOne.intersects(SignBit)) {
|
|
KnownOne |= HighBits; // New bits are known one.
|
|
}
|
|
}
|
|
return;
|
|
case ISD::SIGN_EXTEND_INREG: {
|
|
MVT EVT = cast<VTSDNode>(Op.getOperand(1))->getVT();
|
|
unsigned EBits = EVT.getSizeInBits();
|
|
|
|
// Sign extension. Compute the demanded bits in the result that are not
|
|
// present in the input.
|
|
APInt NewBits = APInt::getHighBitsSet(BitWidth, BitWidth - EBits) & Mask;
|
|
|
|
APInt InSignBit = APInt::getSignBit(EBits);
|
|
APInt InputDemandedBits = Mask & APInt::getLowBitsSet(BitWidth, EBits);
|
|
|
|
// If the sign extended bits are demanded, we know that the sign
|
|
// bit is demanded.
|
|
InSignBit.zext(BitWidth);
|
|
if (NewBits.getBoolValue())
|
|
InputDemandedBits |= InSignBit;
|
|
|
|
ComputeMaskedBits(Op.getOperand(0), InputDemandedBits,
|
|
KnownZero, KnownOne, Depth+1);
|
|
assert((KnownZero & KnownOne) == 0 && "Bits known to be one AND zero?");
|
|
|
|
// If the sign bit of the input is known set or clear, then we know the
|
|
// top bits of the result.
|
|
if (KnownZero.intersects(InSignBit)) { // Input sign bit known clear
|
|
KnownZero |= NewBits;
|
|
KnownOne &= ~NewBits;
|
|
} else if (KnownOne.intersects(InSignBit)) { // Input sign bit known set
|
|
KnownOne |= NewBits;
|
|
KnownZero &= ~NewBits;
|
|
} else { // Input sign bit unknown
|
|
KnownZero &= ~NewBits;
|
|
KnownOne &= ~NewBits;
|
|
}
|
|
return;
|
|
}
|
|
case ISD::CTTZ:
|
|
case ISD::CTLZ:
|
|
case ISD::CTPOP: {
|
|
unsigned LowBits = Log2_32(BitWidth)+1;
|
|
KnownZero = APInt::getHighBitsSet(BitWidth, BitWidth - LowBits);
|
|
KnownOne.clear();
|
|
return;
|
|
}
|
|
case ISD::LOAD: {
|
|
if (ISD::isZEXTLoad(Op.Val)) {
|
|
LoadSDNode *LD = cast<LoadSDNode>(Op);
|
|
MVT VT = LD->getMemoryVT();
|
|
unsigned MemBits = VT.getSizeInBits();
|
|
KnownZero |= APInt::getHighBitsSet(BitWidth, BitWidth - MemBits) & Mask;
|
|
}
|
|
return;
|
|
}
|
|
case ISD::ZERO_EXTEND: {
|
|
MVT InVT = Op.getOperand(0).getValueType();
|
|
unsigned InBits = InVT.getSizeInBits();
|
|
APInt NewBits = APInt::getHighBitsSet(BitWidth, BitWidth - InBits) & Mask;
|
|
APInt InMask = Mask;
|
|
InMask.trunc(InBits);
|
|
KnownZero.trunc(InBits);
|
|
KnownOne.trunc(InBits);
|
|
ComputeMaskedBits(Op.getOperand(0), InMask, KnownZero, KnownOne, Depth+1);
|
|
KnownZero.zext(BitWidth);
|
|
KnownOne.zext(BitWidth);
|
|
KnownZero |= NewBits;
|
|
return;
|
|
}
|
|
case ISD::SIGN_EXTEND: {
|
|
MVT InVT = Op.getOperand(0).getValueType();
|
|
unsigned InBits = InVT.getSizeInBits();
|
|
APInt InSignBit = APInt::getSignBit(InBits);
|
|
APInt NewBits = APInt::getHighBitsSet(BitWidth, BitWidth - InBits) & Mask;
|
|
APInt InMask = Mask;
|
|
InMask.trunc(InBits);
|
|
|
|
// If any of the sign extended bits are demanded, we know that the sign
|
|
// bit is demanded. Temporarily set this bit in the mask for our callee.
|
|
if (NewBits.getBoolValue())
|
|
InMask |= InSignBit;
|
|
|
|
KnownZero.trunc(InBits);
|
|
KnownOne.trunc(InBits);
|
|
ComputeMaskedBits(Op.getOperand(0), InMask, KnownZero, KnownOne, Depth+1);
|
|
|
|
// Note if the sign bit is known to be zero or one.
|
|
bool SignBitKnownZero = KnownZero.isNegative();
|
|
bool SignBitKnownOne = KnownOne.isNegative();
|
|
assert(!(SignBitKnownZero && SignBitKnownOne) &&
|
|
"Sign bit can't be known to be both zero and one!");
|
|
|
|
// If the sign bit wasn't actually demanded by our caller, we don't
|
|
// want it set in the KnownZero and KnownOne result values. Reset the
|
|
// mask and reapply it to the result values.
|
|
InMask = Mask;
|
|
InMask.trunc(InBits);
|
|
KnownZero &= InMask;
|
|
KnownOne &= InMask;
|
|
|
|
KnownZero.zext(BitWidth);
|
|
KnownOne.zext(BitWidth);
|
|
|
|
// If the sign bit is known zero or one, the top bits match.
|
|
if (SignBitKnownZero)
|
|
KnownZero |= NewBits;
|
|
else if (SignBitKnownOne)
|
|
KnownOne |= NewBits;
|
|
return;
|
|
}
|
|
case ISD::ANY_EXTEND: {
|
|
MVT InVT = Op.getOperand(0).getValueType();
|
|
unsigned InBits = InVT.getSizeInBits();
|
|
APInt InMask = Mask;
|
|
InMask.trunc(InBits);
|
|
KnownZero.trunc(InBits);
|
|
KnownOne.trunc(InBits);
|
|
ComputeMaskedBits(Op.getOperand(0), InMask, KnownZero, KnownOne, Depth+1);
|
|
KnownZero.zext(BitWidth);
|
|
KnownOne.zext(BitWidth);
|
|
return;
|
|
}
|
|
case ISD::TRUNCATE: {
|
|
MVT InVT = Op.getOperand(0).getValueType();
|
|
unsigned InBits = InVT.getSizeInBits();
|
|
APInt InMask = Mask;
|
|
InMask.zext(InBits);
|
|
KnownZero.zext(InBits);
|
|
KnownOne.zext(InBits);
|
|
ComputeMaskedBits(Op.getOperand(0), InMask, KnownZero, KnownOne, Depth+1);
|
|
assert((KnownZero & KnownOne) == 0 && "Bits known to be one AND zero?");
|
|
KnownZero.trunc(BitWidth);
|
|
KnownOne.trunc(BitWidth);
|
|
break;
|
|
}
|
|
case ISD::AssertZext: {
|
|
MVT VT = cast<VTSDNode>(Op.getOperand(1))->getVT();
|
|
APInt InMask = APInt::getLowBitsSet(BitWidth, VT.getSizeInBits());
|
|
ComputeMaskedBits(Op.getOperand(0), Mask & InMask, KnownZero,
|
|
KnownOne, Depth+1);
|
|
KnownZero |= (~InMask) & Mask;
|
|
return;
|
|
}
|
|
case ISD::FGETSIGN:
|
|
// All bits are zero except the low bit.
|
|
KnownZero = APInt::getHighBitsSet(BitWidth, BitWidth - 1);
|
|
return;
|
|
|
|
case ISD::SUB: {
|
|
if (ConstantSDNode *CLHS = dyn_cast<ConstantSDNode>(Op.getOperand(0))) {
|
|
// We know that the top bits of C-X are clear if X contains less bits
|
|
// than C (i.e. no wrap-around can happen). For example, 20-X is
|
|
// positive if we can prove that X is >= 0 and < 16.
|
|
if (CLHS->getAPIntValue().isNonNegative()) {
|
|
unsigned NLZ = (CLHS->getAPIntValue()+1).countLeadingZeros();
|
|
// NLZ can't be BitWidth with no sign bit
|
|
APInt MaskV = APInt::getHighBitsSet(BitWidth, NLZ+1);
|
|
ComputeMaskedBits(Op.getOperand(1), MaskV, KnownZero2, KnownOne2,
|
|
Depth+1);
|
|
|
|
// If all of the MaskV bits are known to be zero, then we know the
|
|
// output top bits are zero, because we now know that the output is
|
|
// from [0-C].
|
|
if ((KnownZero2 & MaskV) == MaskV) {
|
|
unsigned NLZ2 = CLHS->getAPIntValue().countLeadingZeros();
|
|
// Top bits known zero.
|
|
KnownZero = APInt::getHighBitsSet(BitWidth, NLZ2) & Mask;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
// fall through
|
|
case ISD::ADD: {
|
|
// Output known-0 bits are known if clear or set in both the low clear bits
|
|
// common to both LHS & RHS. For example, 8+(X<<3) is known to have the
|
|
// low 3 bits clear.
|
|
APInt Mask2 = APInt::getLowBitsSet(BitWidth, Mask.countTrailingOnes());
|
|
ComputeMaskedBits(Op.getOperand(0), Mask2, KnownZero2, KnownOne2, Depth+1);
|
|
assert((KnownZero2 & KnownOne2) == 0 && "Bits known to be one AND zero?");
|
|
unsigned KnownZeroOut = KnownZero2.countTrailingOnes();
|
|
|
|
ComputeMaskedBits(Op.getOperand(1), Mask2, KnownZero2, KnownOne2, Depth+1);
|
|
assert((KnownZero2 & KnownOne2) == 0 && "Bits known to be one AND zero?");
|
|
KnownZeroOut = std::min(KnownZeroOut,
|
|
KnownZero2.countTrailingOnes());
|
|
|
|
KnownZero |= APInt::getLowBitsSet(BitWidth, KnownZeroOut);
|
|
return;
|
|
}
|
|
case ISD::SREM:
|
|
if (ConstantSDNode *Rem = dyn_cast<ConstantSDNode>(Op.getOperand(1))) {
|
|
APInt RA = Rem->getAPIntValue();
|
|
if (RA.isPowerOf2() || (-RA).isPowerOf2()) {
|
|
APInt LowBits = RA.isStrictlyPositive() ? (RA - 1) : ~RA;
|
|
APInt Mask2 = LowBits | APInt::getSignBit(BitWidth);
|
|
ComputeMaskedBits(Op.getOperand(0), Mask2,KnownZero2,KnownOne2,Depth+1);
|
|
|
|
// The sign of a remainder is equal to the sign of the first
|
|
// operand (zero being positive).
|
|
if (KnownZero2[BitWidth-1] || ((KnownZero2 & LowBits) == LowBits))
|
|
KnownZero2 |= ~LowBits;
|
|
else if (KnownOne2[BitWidth-1])
|
|
KnownOne2 |= ~LowBits;
|
|
|
|
KnownZero |= KnownZero2 & Mask;
|
|
KnownOne |= KnownOne2 & Mask;
|
|
|
|
assert((KnownZero & KnownOne) == 0&&"Bits known to be one AND zero?");
|
|
}
|
|
}
|
|
return;
|
|
case ISD::UREM: {
|
|
if (ConstantSDNode *Rem = dyn_cast<ConstantSDNode>(Op.getOperand(1))) {
|
|
APInt RA = Rem->getAPIntValue();
|
|
if (RA.isPowerOf2()) {
|
|
APInt LowBits = (RA - 1);
|
|
APInt Mask2 = LowBits & Mask;
|
|
KnownZero |= ~LowBits & Mask;
|
|
ComputeMaskedBits(Op.getOperand(0), Mask2, KnownZero, KnownOne,Depth+1);
|
|
assert((KnownZero & KnownOne) == 0&&"Bits known to be one AND zero?");
|
|
break;
|
|
}
|
|
}
|
|
|
|
// Since the result is less than or equal to either operand, any leading
|
|
// zero bits in either operand must also exist in the result.
|
|
APInt AllOnes = APInt::getAllOnesValue(BitWidth);
|
|
ComputeMaskedBits(Op.getOperand(0), AllOnes, KnownZero, KnownOne,
|
|
Depth+1);
|
|
ComputeMaskedBits(Op.getOperand(1), AllOnes, KnownZero2, KnownOne2,
|
|
Depth+1);
|
|
|
|
uint32_t Leaders = std::max(KnownZero.countLeadingOnes(),
|
|
KnownZero2.countLeadingOnes());
|
|
KnownOne.clear();
|
|
KnownZero = APInt::getHighBitsSet(BitWidth, Leaders) & Mask;
|
|
return;
|
|
}
|
|
default:
|
|
// Allow the target to implement this method for its nodes.
|
|
if (Op.getOpcode() >= ISD::BUILTIN_OP_END) {
|
|
case ISD::INTRINSIC_WO_CHAIN:
|
|
case ISD::INTRINSIC_W_CHAIN:
|
|
case ISD::INTRINSIC_VOID:
|
|
TLI.computeMaskedBitsForTargetNode(Op, Mask, KnownZero, KnownOne, *this);
|
|
}
|
|
return;
|
|
}
|
|
}
|
|
|
|
/// ComputeNumSignBits - Return the number of times the sign bit of the
|
|
/// register is replicated into the other bits. We know that at least 1 bit
|
|
/// is always equal to the sign bit (itself), but other cases can give us
|
|
/// information. For example, immediately after an "SRA X, 2", we know that
|
|
/// the top 3 bits are all equal to each other, so we return 3.
|
|
unsigned SelectionDAG::ComputeNumSignBits(SDOperand Op, unsigned Depth) const{
|
|
MVT VT = Op.getValueType();
|
|
assert(VT.isInteger() && "Invalid VT!");
|
|
unsigned VTBits = VT.getSizeInBits();
|
|
unsigned Tmp, Tmp2;
|
|
unsigned FirstAnswer = 1;
|
|
|
|
if (Depth == 6)
|
|
return 1; // Limit search depth.
|
|
|
|
switch (Op.getOpcode()) {
|
|
default: break;
|
|
case ISD::AssertSext:
|
|
Tmp = cast<VTSDNode>(Op.getOperand(1))->getVT().getSizeInBits();
|
|
return VTBits-Tmp+1;
|
|
case ISD::AssertZext:
|
|
Tmp = cast<VTSDNode>(Op.getOperand(1))->getVT().getSizeInBits();
|
|
return VTBits-Tmp;
|
|
|
|
case ISD::Constant: {
|
|
const APInt &Val = cast<ConstantSDNode>(Op)->getAPIntValue();
|
|
// If negative, return # leading ones.
|
|
if (Val.isNegative())
|
|
return Val.countLeadingOnes();
|
|
|
|
// Return # leading zeros.
|
|
return Val.countLeadingZeros();
|
|
}
|
|
|
|
case ISD::SIGN_EXTEND:
|
|
Tmp = VTBits-Op.getOperand(0).getValueType().getSizeInBits();
|
|
return ComputeNumSignBits(Op.getOperand(0), Depth+1) + Tmp;
|
|
|
|
case ISD::SIGN_EXTEND_INREG:
|
|
// Max of the input and what this extends.
|
|
Tmp = cast<VTSDNode>(Op.getOperand(1))->getVT().getSizeInBits();
|
|
Tmp = VTBits-Tmp+1;
|
|
|
|
Tmp2 = ComputeNumSignBits(Op.getOperand(0), Depth+1);
|
|
return std::max(Tmp, Tmp2);
|
|
|
|
case ISD::SRA:
|
|
Tmp = ComputeNumSignBits(Op.getOperand(0), Depth+1);
|
|
// SRA X, C -> adds C sign bits.
|
|
if (ConstantSDNode *C = dyn_cast<ConstantSDNode>(Op.getOperand(1))) {
|
|
Tmp += C->getValue();
|
|
if (Tmp > VTBits) Tmp = VTBits;
|
|
}
|
|
return Tmp;
|
|
case ISD::SHL:
|
|
if (ConstantSDNode *C = dyn_cast<ConstantSDNode>(Op.getOperand(1))) {
|
|
// shl destroys sign bits.
|
|
Tmp = ComputeNumSignBits(Op.getOperand(0), Depth+1);
|
|
if (C->getValue() >= VTBits || // Bad shift.
|
|
C->getValue() >= Tmp) break; // Shifted all sign bits out.
|
|
return Tmp - C->getValue();
|
|
}
|
|
break;
|
|
case ISD::AND:
|
|
case ISD::OR:
|
|
case ISD::XOR: // NOT is handled here.
|
|
// Logical binary ops preserve the number of sign bits at the worst.
|
|
Tmp = ComputeNumSignBits(Op.getOperand(0), Depth+1);
|
|
if (Tmp != 1) {
|
|
Tmp2 = ComputeNumSignBits(Op.getOperand(1), Depth+1);
|
|
FirstAnswer = std::min(Tmp, Tmp2);
|
|
// We computed what we know about the sign bits as our first
|
|
// answer. Now proceed to the generic code that uses
|
|
// ComputeMaskedBits, and pick whichever answer is better.
|
|
}
|
|
break;
|
|
|
|
case ISD::SELECT:
|
|
Tmp = ComputeNumSignBits(Op.getOperand(1), Depth+1);
|
|
if (Tmp == 1) return 1; // Early out.
|
|
Tmp2 = ComputeNumSignBits(Op.getOperand(2), Depth+1);
|
|
return std::min(Tmp, Tmp2);
|
|
|
|
case ISD::SETCC:
|
|
// If setcc returns 0/-1, all bits are sign bits.
|
|
if (TLI.getSetCCResultContents() ==
|
|
TargetLowering::ZeroOrNegativeOneSetCCResult)
|
|
return VTBits;
|
|
break;
|
|
case ISD::ROTL:
|
|
case ISD::ROTR:
|
|
if (ConstantSDNode *C = dyn_cast<ConstantSDNode>(Op.getOperand(1))) {
|
|
unsigned RotAmt = C->getValue() & (VTBits-1);
|
|
|
|
// Handle rotate right by N like a rotate left by 32-N.
|
|
if (Op.getOpcode() == ISD::ROTR)
|
|
RotAmt = (VTBits-RotAmt) & (VTBits-1);
|
|
|
|
// If we aren't rotating out all of the known-in sign bits, return the
|
|
// number that are left. This handles rotl(sext(x), 1) for example.
|
|
Tmp = ComputeNumSignBits(Op.getOperand(0), Depth+1);
|
|
if (Tmp > RotAmt+1) return Tmp-RotAmt;
|
|
}
|
|
break;
|
|
case ISD::ADD:
|
|
// Add can have at most one carry bit. Thus we know that the output
|
|
// is, at worst, one more bit than the inputs.
|
|
Tmp = ComputeNumSignBits(Op.getOperand(0), Depth+1);
|
|
if (Tmp == 1) return 1; // Early out.
|
|
|
|
// Special case decrementing a value (ADD X, -1):
|
|
if (ConstantSDNode *CRHS = dyn_cast<ConstantSDNode>(Op.getOperand(0)))
|
|
if (CRHS->isAllOnesValue()) {
|
|
APInt KnownZero, KnownOne;
|
|
APInt Mask = APInt::getAllOnesValue(VTBits);
|
|
ComputeMaskedBits(Op.getOperand(0), Mask, KnownZero, KnownOne, Depth+1);
|
|
|
|
// If the input is known to be 0 or 1, the output is 0/-1, which is all
|
|
// sign bits set.
|
|
if ((KnownZero | APInt(VTBits, 1)) == Mask)
|
|
return VTBits;
|
|
|
|
// If we are subtracting one from a positive number, there is no carry
|
|
// out of the result.
|
|
if (KnownZero.isNegative())
|
|
return Tmp;
|
|
}
|
|
|
|
Tmp2 = ComputeNumSignBits(Op.getOperand(1), Depth+1);
|
|
if (Tmp2 == 1) return 1;
|
|
return std::min(Tmp, Tmp2)-1;
|
|
break;
|
|
|
|
case ISD::SUB:
|
|
Tmp2 = ComputeNumSignBits(Op.getOperand(1), Depth+1);
|
|
if (Tmp2 == 1) return 1;
|
|
|
|
// Handle NEG.
|
|
if (ConstantSDNode *CLHS = dyn_cast<ConstantSDNode>(Op.getOperand(0)))
|
|
if (CLHS->isNullValue()) {
|
|
APInt KnownZero, KnownOne;
|
|
APInt Mask = APInt::getAllOnesValue(VTBits);
|
|
ComputeMaskedBits(Op.getOperand(1), Mask, KnownZero, KnownOne, Depth+1);
|
|
// If the input is known to be 0 or 1, the output is 0/-1, which is all
|
|
// sign bits set.
|
|
if ((KnownZero | APInt(VTBits, 1)) == Mask)
|
|
return VTBits;
|
|
|
|
// If the input is known to be positive (the sign bit is known clear),
|
|
// the output of the NEG has the same number of sign bits as the input.
|
|
if (KnownZero.isNegative())
|
|
return Tmp2;
|
|
|
|
// Otherwise, we treat this like a SUB.
|
|
}
|
|
|
|
// Sub can have at most one carry bit. Thus we know that the output
|
|
// is, at worst, one more bit than the inputs.
|
|
Tmp = ComputeNumSignBits(Op.getOperand(0), Depth+1);
|
|
if (Tmp == 1) return 1; // Early out.
|
|
return std::min(Tmp, Tmp2)-1;
|
|
break;
|
|
case ISD::TRUNCATE:
|
|
// FIXME: it's tricky to do anything useful for this, but it is an important
|
|
// case for targets like X86.
|
|
break;
|
|
}
|
|
|
|
// Handle LOADX separately here. EXTLOAD case will fallthrough.
|
|
if (Op.getOpcode() == ISD::LOAD) {
|
|
LoadSDNode *LD = cast<LoadSDNode>(Op);
|
|
unsigned ExtType = LD->getExtensionType();
|
|
switch (ExtType) {
|
|
default: break;
|
|
case ISD::SEXTLOAD: // '17' bits known
|
|
Tmp = LD->getMemoryVT().getSizeInBits();
|
|
return VTBits-Tmp+1;
|
|
case ISD::ZEXTLOAD: // '16' bits known
|
|
Tmp = LD->getMemoryVT().getSizeInBits();
|
|
return VTBits-Tmp;
|
|
}
|
|
}
|
|
|
|
// Allow the target to implement this method for its nodes.
|
|
if (Op.getOpcode() >= ISD::BUILTIN_OP_END ||
|
|
Op.getOpcode() == ISD::INTRINSIC_WO_CHAIN ||
|
|
Op.getOpcode() == ISD::INTRINSIC_W_CHAIN ||
|
|
Op.getOpcode() == ISD::INTRINSIC_VOID) {
|
|
unsigned NumBits = TLI.ComputeNumSignBitsForTargetNode(Op, Depth);
|
|
if (NumBits > 1) FirstAnswer = std::max(FirstAnswer, NumBits);
|
|
}
|
|
|
|
// Finally, if we can prove that the top bits of the result are 0's or 1's,
|
|
// use this information.
|
|
APInt KnownZero, KnownOne;
|
|
APInt Mask = APInt::getAllOnesValue(VTBits);
|
|
ComputeMaskedBits(Op, Mask, KnownZero, KnownOne, Depth);
|
|
|
|
if (KnownZero.isNegative()) { // sign bit is 0
|
|
Mask = KnownZero;
|
|
} else if (KnownOne.isNegative()) { // sign bit is 1;
|
|
Mask = KnownOne;
|
|
} else {
|
|
// Nothing known.
|
|
return FirstAnswer;
|
|
}
|
|
|
|
// Okay, we know that the sign bit in Mask is set. Use CLZ to determine
|
|
// the number of identical bits in the top of the input value.
|
|
Mask = ~Mask;
|
|
Mask <<= Mask.getBitWidth()-VTBits;
|
|
// Return # leading zeros. We use 'min' here in case Val was zero before
|
|
// shifting. We don't want to return '64' as for an i32 "0".
|
|
return std::max(FirstAnswer, std::min(VTBits, Mask.countLeadingZeros()));
|
|
}
|
|
|
|
|
|
bool SelectionDAG::isVerifiedDebugInfoDesc(SDOperand Op) const {
|
|
GlobalAddressSDNode *GA = dyn_cast<GlobalAddressSDNode>(Op);
|
|
if (!GA) return false;
|
|
GlobalVariable *GV = dyn_cast<GlobalVariable>(GA->getGlobal());
|
|
if (!GV) return false;
|
|
MachineModuleInfo *MMI = getMachineModuleInfo();
|
|
return MMI && MMI->hasDebugInfo() && MMI->isVerified(GV);
|
|
}
|
|
|
|
|
|
/// getShuffleScalarElt - Returns the scalar element that will make up the ith
|
|
/// element of the result of the vector shuffle.
|
|
SDOperand SelectionDAG::getShuffleScalarElt(const SDNode *N, unsigned i) {
|
|
MVT VT = N->getValueType(0);
|
|
SDOperand PermMask = N->getOperand(2);
|
|
SDOperand Idx = PermMask.getOperand(i);
|
|
if (Idx.getOpcode() == ISD::UNDEF)
|
|
return getNode(ISD::UNDEF, VT.getVectorElementType());
|
|
unsigned Index = cast<ConstantSDNode>(Idx)->getValue();
|
|
unsigned NumElems = PermMask.getNumOperands();
|
|
SDOperand V = (Index < NumElems) ? N->getOperand(0) : N->getOperand(1);
|
|
Index %= NumElems;
|
|
|
|
if (V.getOpcode() == ISD::BIT_CONVERT) {
|
|
V = V.getOperand(0);
|
|
if (V.getValueType().getVectorNumElements() != NumElems)
|
|
return SDOperand();
|
|
}
|
|
if (V.getOpcode() == ISD::SCALAR_TO_VECTOR)
|
|
return (Index == 0) ? V.getOperand(0)
|
|
: getNode(ISD::UNDEF, VT.getVectorElementType());
|
|
if (V.getOpcode() == ISD::BUILD_VECTOR)
|
|
return V.getOperand(Index);
|
|
if (V.getOpcode() == ISD::VECTOR_SHUFFLE)
|
|
return getShuffleScalarElt(V.Val, Index);
|
|
return SDOperand();
|
|
}
|
|
|
|
|
|
/// getNode - Gets or creates the specified node.
|
|
///
|
|
SDOperand SelectionDAG::getNode(unsigned Opcode, MVT VT) {
|
|
FoldingSetNodeID ID;
|
|
AddNodeIDNode(ID, Opcode, getVTList(VT), (SDOperand*)0, 0);
|
|
void *IP = 0;
|
|
if (SDNode *E = CSEMap.FindNodeOrInsertPos(ID, IP))
|
|
return SDOperand(E, 0);
|
|
SDNode *N = new SDNode(Opcode, SDNode::getSDVTList(VT));
|
|
CSEMap.InsertNode(N, IP);
|
|
|
|
AllNodes.push_back(N);
|
|
return SDOperand(N, 0);
|
|
}
|
|
|
|
SDOperand SelectionDAG::getNode(unsigned Opcode, MVT VT, SDOperand Operand) {
|
|
// Constant fold unary operations with an integer constant operand.
|
|
if (ConstantSDNode *C = dyn_cast<ConstantSDNode>(Operand.Val)) {
|
|
const APInt &Val = C->getAPIntValue();
|
|
unsigned BitWidth = VT.getSizeInBits();
|
|
switch (Opcode) {
|
|
default: break;
|
|
case ISD::SIGN_EXTEND:
|
|
return getConstant(APInt(Val).sextOrTrunc(BitWidth), VT);
|
|
case ISD::ANY_EXTEND:
|
|
case ISD::ZERO_EXTEND:
|
|
case ISD::TRUNCATE:
|
|
return getConstant(APInt(Val).zextOrTrunc(BitWidth), VT);
|
|
case ISD::UINT_TO_FP:
|
|
case ISD::SINT_TO_FP: {
|
|
const uint64_t zero[] = {0, 0};
|
|
// No compile time operations on this type.
|
|
if (VT==MVT::ppcf128)
|
|
break;
|
|
APFloat apf = APFloat(APInt(BitWidth, 2, zero));
|
|
(void)apf.convertFromAPInt(Val,
|
|
Opcode==ISD::SINT_TO_FP,
|
|
APFloat::rmNearestTiesToEven);
|
|
return getConstantFP(apf, VT);
|
|
}
|
|
case ISD::BIT_CONVERT:
|
|
if (VT == MVT::f32 && C->getValueType(0) == MVT::i32)
|
|
return getConstantFP(Val.bitsToFloat(), VT);
|
|
else if (VT == MVT::f64 && C->getValueType(0) == MVT::i64)
|
|
return getConstantFP(Val.bitsToDouble(), VT);
|
|
break;
|
|
case ISD::BSWAP:
|
|
return getConstant(Val.byteSwap(), VT);
|
|
case ISD::CTPOP:
|
|
return getConstant(Val.countPopulation(), VT);
|
|
case ISD::CTLZ:
|
|
return getConstant(Val.countLeadingZeros(), VT);
|
|
case ISD::CTTZ:
|
|
return getConstant(Val.countTrailingZeros(), VT);
|
|
}
|
|
}
|
|
|
|
// Constant fold unary operations with a floating point constant operand.
|
|
if (ConstantFPSDNode *C = dyn_cast<ConstantFPSDNode>(Operand.Val)) {
|
|
APFloat V = C->getValueAPF(); // make copy
|
|
if (VT != MVT::ppcf128 && Operand.getValueType() != MVT::ppcf128) {
|
|
switch (Opcode) {
|
|
case ISD::FNEG:
|
|
V.changeSign();
|
|
return getConstantFP(V, VT);
|
|
case ISD::FABS:
|
|
V.clearSign();
|
|
return getConstantFP(V, VT);
|
|
case ISD::FP_ROUND:
|
|
case ISD::FP_EXTEND:
|
|
// This can return overflow, underflow, or inexact; we don't care.
|
|
// FIXME need to be more flexible about rounding mode.
|
|
(void)V.convert(*MVTToAPFloatSemantics(VT),
|
|
APFloat::rmNearestTiesToEven);
|
|
return getConstantFP(V, VT);
|
|
case ISD::FP_TO_SINT:
|
|
case ISD::FP_TO_UINT: {
|
|
integerPart x;
|
|
assert(integerPartWidth >= 64);
|
|
// FIXME need to be more flexible about rounding mode.
|
|
APFloat::opStatus s = V.convertToInteger(&x, 64U,
|
|
Opcode==ISD::FP_TO_SINT,
|
|
APFloat::rmTowardZero);
|
|
if (s==APFloat::opInvalidOp) // inexact is OK, in fact usual
|
|
break;
|
|
return getConstant(x, VT);
|
|
}
|
|
case ISD::BIT_CONVERT:
|
|
if (VT == MVT::i32 && C->getValueType(0) == MVT::f32)
|
|
return getConstant((uint32_t)V.convertToAPInt().getZExtValue(), VT);
|
|
else if (VT == MVT::i64 && C->getValueType(0) == MVT::f64)
|
|
return getConstant(V.convertToAPInt().getZExtValue(), VT);
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
unsigned OpOpcode = Operand.Val->getOpcode();
|
|
switch (Opcode) {
|
|
case ISD::TokenFactor:
|
|
case ISD::MERGE_VALUES:
|
|
return Operand; // Factor or merge of one node? No need.
|
|
case ISD::FP_ROUND: assert(0 && "Invalid method to make FP_ROUND node");
|
|
case ISD::FP_EXTEND:
|
|
assert(VT.isFloatingPoint() &&
|
|
Operand.getValueType().isFloatingPoint() && "Invalid FP cast!");
|
|
if (Operand.getValueType() == VT) return Operand; // noop conversion.
|
|
if (Operand.getOpcode() == ISD::UNDEF)
|
|
return getNode(ISD::UNDEF, VT);
|
|
break;
|
|
case ISD::SIGN_EXTEND:
|
|
assert(VT.isInteger() && Operand.getValueType().isInteger() &&
|
|
"Invalid SIGN_EXTEND!");
|
|
if (Operand.getValueType() == VT) return Operand; // noop extension
|
|
assert(Operand.getValueType().bitsLT(VT)
|
|
&& "Invalid sext node, dst < src!");
|
|
if (OpOpcode == ISD::SIGN_EXTEND || OpOpcode == ISD::ZERO_EXTEND)
|
|
return getNode(OpOpcode, VT, Operand.Val->getOperand(0));
|
|
break;
|
|
case ISD::ZERO_EXTEND:
|
|
assert(VT.isInteger() && Operand.getValueType().isInteger() &&
|
|
"Invalid ZERO_EXTEND!");
|
|
if (Operand.getValueType() == VT) return Operand; // noop extension
|
|
assert(Operand.getValueType().bitsLT(VT)
|
|
&& "Invalid zext node, dst < src!");
|
|
if (OpOpcode == ISD::ZERO_EXTEND) // (zext (zext x)) -> (zext x)
|
|
return getNode(ISD::ZERO_EXTEND, VT, Operand.Val->getOperand(0));
|
|
break;
|
|
case ISD::ANY_EXTEND:
|
|
assert(VT.isInteger() && Operand.getValueType().isInteger() &&
|
|
"Invalid ANY_EXTEND!");
|
|
if (Operand.getValueType() == VT) return Operand; // noop extension
|
|
assert(Operand.getValueType().bitsLT(VT)
|
|
&& "Invalid anyext node, dst < src!");
|
|
if (OpOpcode == ISD::ZERO_EXTEND || OpOpcode == ISD::SIGN_EXTEND)
|
|
// (ext (zext x)) -> (zext x) and (ext (sext x)) -> (sext x)
|
|
return getNode(OpOpcode, VT, Operand.Val->getOperand(0));
|
|
break;
|
|
case ISD::TRUNCATE:
|
|
assert(VT.isInteger() && Operand.getValueType().isInteger() &&
|
|
"Invalid TRUNCATE!");
|
|
if (Operand.getValueType() == VT) return Operand; // noop truncate
|
|
assert(Operand.getValueType().bitsGT(VT)
|
|
&& "Invalid truncate node, src < dst!");
|
|
if (OpOpcode == ISD::TRUNCATE)
|
|
return getNode(ISD::TRUNCATE, VT, Operand.Val->getOperand(0));
|
|
else if (OpOpcode == ISD::ZERO_EXTEND || OpOpcode == ISD::SIGN_EXTEND ||
|
|
OpOpcode == ISD::ANY_EXTEND) {
|
|
// If the source is smaller than the dest, we still need an extend.
|
|
if (Operand.Val->getOperand(0).getValueType().bitsLT(VT))
|
|
return getNode(OpOpcode, VT, Operand.Val->getOperand(0));
|
|
else if (Operand.Val->getOperand(0).getValueType().bitsGT(VT))
|
|
return getNode(ISD::TRUNCATE, VT, Operand.Val->getOperand(0));
|
|
else
|
|
return Operand.Val->getOperand(0);
|
|
}
|
|
break;
|
|
case ISD::BIT_CONVERT:
|
|
// Basic sanity checking.
|
|
assert(VT.getSizeInBits() == Operand.getValueType().getSizeInBits()
|
|
&& "Cannot BIT_CONVERT between types of different sizes!");
|
|
if (VT == Operand.getValueType()) return Operand; // noop conversion.
|
|
if (OpOpcode == ISD::BIT_CONVERT) // bitconv(bitconv(x)) -> bitconv(x)
|
|
return getNode(ISD::BIT_CONVERT, VT, Operand.getOperand(0));
|
|
if (OpOpcode == ISD::UNDEF)
|
|
return getNode(ISD::UNDEF, VT);
|
|
break;
|
|
case ISD::SCALAR_TO_VECTOR:
|
|
assert(VT.isVector() && !Operand.getValueType().isVector() &&
|
|
VT.getVectorElementType() == Operand.getValueType() &&
|
|
"Illegal SCALAR_TO_VECTOR node!");
|
|
if (OpOpcode == ISD::UNDEF)
|
|
return getNode(ISD::UNDEF, VT);
|
|
// scalar_to_vector(extract_vector_elt V, 0) -> V, top bits are undefined.
|
|
if (OpOpcode == ISD::EXTRACT_VECTOR_ELT &&
|
|
isa<ConstantSDNode>(Operand.getOperand(1)) &&
|
|
Operand.getConstantOperandVal(1) == 0 &&
|
|
Operand.getOperand(0).getValueType() == VT)
|
|
return Operand.getOperand(0);
|
|
break;
|
|
case ISD::FNEG:
|
|
if (OpOpcode == ISD::FSUB) // -(X-Y) -> (Y-X)
|
|
return getNode(ISD::FSUB, VT, Operand.Val->getOperand(1),
|
|
Operand.Val->getOperand(0));
|
|
if (OpOpcode == ISD::FNEG) // --X -> X
|
|
return Operand.Val->getOperand(0);
|
|
break;
|
|
case ISD::FABS:
|
|
if (OpOpcode == ISD::FNEG) // abs(-X) -> abs(X)
|
|
return getNode(ISD::FABS, VT, Operand.Val->getOperand(0));
|
|
break;
|
|
}
|
|
|
|
SDNode *N;
|
|
SDVTList VTs = getVTList(VT);
|
|
if (VT != MVT::Flag) { // Don't CSE flag producing nodes
|
|
FoldingSetNodeID ID;
|
|
SDOperand Ops[1] = { Operand };
|
|
AddNodeIDNode(ID, Opcode, VTs, Ops, 1);
|
|
void *IP = 0;
|
|
if (SDNode *E = CSEMap.FindNodeOrInsertPos(ID, IP))
|
|
return SDOperand(E, 0);
|
|
N = new UnarySDNode(Opcode, VTs, Operand);
|
|
CSEMap.InsertNode(N, IP);
|
|
} else {
|
|
N = new UnarySDNode(Opcode, VTs, Operand);
|
|
}
|
|
AllNodes.push_back(N);
|
|
return SDOperand(N, 0);
|
|
}
|
|
|
|
|
|
|
|
SDOperand SelectionDAG::getNode(unsigned Opcode, MVT VT,
|
|
SDOperand N1, SDOperand N2) {
|
|
ConstantSDNode *N1C = dyn_cast<ConstantSDNode>(N1.Val);
|
|
ConstantSDNode *N2C = dyn_cast<ConstantSDNode>(N2.Val);
|
|
switch (Opcode) {
|
|
default: break;
|
|
case ISD::TokenFactor:
|
|
assert(VT == MVT::Other && N1.getValueType() == MVT::Other &&
|
|
N2.getValueType() == MVT::Other && "Invalid token factor!");
|
|
// Fold trivial token factors.
|
|
if (N1.getOpcode() == ISD::EntryToken) return N2;
|
|
if (N2.getOpcode() == ISD::EntryToken) return N1;
|
|
break;
|
|
case ISD::AND:
|
|
assert(VT.isInteger() && N1.getValueType() == N2.getValueType() &&
|
|
N1.getValueType() == VT && "Binary operator types must match!");
|
|
// (X & 0) -> 0. This commonly occurs when legalizing i64 values, so it's
|
|
// worth handling here.
|
|
if (N2C && N2C->isNullValue())
|
|
return N2;
|
|
if (N2C && N2C->isAllOnesValue()) // X & -1 -> X
|
|
return N1;
|
|
break;
|
|
case ISD::OR:
|
|
case ISD::XOR:
|
|
case ISD::ADD:
|
|
case ISD::SUB:
|
|
assert(VT.isInteger() && N1.getValueType() == N2.getValueType() &&
|
|
N1.getValueType() == VT && "Binary operator types must match!");
|
|
// (X ^|+- 0) -> X. This commonly occurs when legalizing i64 values, so
|
|
// it's worth handling here.
|
|
if (N2C && N2C->isNullValue())
|
|
return N1;
|
|
break;
|
|
case ISD::UDIV:
|
|
case ISD::UREM:
|
|
case ISD::MULHU:
|
|
case ISD::MULHS:
|
|
assert(VT.isInteger() && "This operator does not apply to FP types!");
|
|
// fall through
|
|
case ISD::MUL:
|
|
case ISD::SDIV:
|
|
case ISD::SREM:
|
|
case ISD::FADD:
|
|
case ISD::FSUB:
|
|
case ISD::FMUL:
|
|
case ISD::FDIV:
|
|
case ISD::FREM:
|
|
assert(N1.getValueType() == N2.getValueType() &&
|
|
N1.getValueType() == VT && "Binary operator types must match!");
|
|
break;
|
|
case ISD::FCOPYSIGN: // N1 and result must match. N1/N2 need not match.
|
|
assert(N1.getValueType() == VT &&
|
|
N1.getValueType().isFloatingPoint() &&
|
|
N2.getValueType().isFloatingPoint() &&
|
|
"Invalid FCOPYSIGN!");
|
|
break;
|
|
case ISD::SHL:
|
|
case ISD::SRA:
|
|
case ISD::SRL:
|
|
case ISD::ROTL:
|
|
case ISD::ROTR:
|
|
assert(VT == N1.getValueType() &&
|
|
"Shift operators return type must be the same as their first arg");
|
|
assert(VT.isInteger() && N2.getValueType().isInteger() &&
|
|
VT != MVT::i1 && "Shifts only work on integers");
|
|
break;
|
|
case ISD::FP_ROUND_INREG: {
|
|
MVT EVT = cast<VTSDNode>(N2)->getVT();
|
|
assert(VT == N1.getValueType() && "Not an inreg round!");
|
|
assert(VT.isFloatingPoint() && EVT.isFloatingPoint() &&
|
|
"Cannot FP_ROUND_INREG integer types");
|
|
assert(EVT.bitsLE(VT) && "Not rounding down!");
|
|
if (cast<VTSDNode>(N2)->getVT() == VT) return N1; // Not actually rounding.
|
|
break;
|
|
}
|
|
case ISD::FP_ROUND:
|
|
assert(VT.isFloatingPoint() &&
|
|
N1.getValueType().isFloatingPoint() &&
|
|
VT.bitsLE(N1.getValueType()) &&
|
|
isa<ConstantSDNode>(N2) && "Invalid FP_ROUND!");
|
|
if (N1.getValueType() == VT) return N1; // noop conversion.
|
|
break;
|
|
case ISD::AssertSext:
|
|
case ISD::AssertZext: {
|
|
MVT EVT = cast<VTSDNode>(N2)->getVT();
|
|
assert(VT == N1.getValueType() && "Not an inreg extend!");
|
|
assert(VT.isInteger() && EVT.isInteger() &&
|
|
"Cannot *_EXTEND_INREG FP types");
|
|
assert(EVT.bitsLE(VT) && "Not extending!");
|
|
if (VT == EVT) return N1; // noop assertion.
|
|
break;
|
|
}
|
|
case ISD::SIGN_EXTEND_INREG: {
|
|
MVT EVT = cast<VTSDNode>(N2)->getVT();
|
|
assert(VT == N1.getValueType() && "Not an inreg extend!");
|
|
assert(VT.isInteger() && EVT.isInteger() &&
|
|
"Cannot *_EXTEND_INREG FP types");
|
|
assert(EVT.bitsLE(VT) && "Not extending!");
|
|
if (EVT == VT) return N1; // Not actually extending
|
|
|
|
if (N1C) {
|
|
APInt Val = N1C->getAPIntValue();
|
|
unsigned FromBits = cast<VTSDNode>(N2)->getVT().getSizeInBits();
|
|
Val <<= Val.getBitWidth()-FromBits;
|
|
Val = Val.ashr(Val.getBitWidth()-FromBits);
|
|
return getConstant(Val, VT);
|
|
}
|
|
break;
|
|
}
|
|
case ISD::EXTRACT_VECTOR_ELT:
|
|
assert(N2C && "Bad EXTRACT_VECTOR_ELT!");
|
|
|
|
// EXTRACT_VECTOR_ELT of an UNDEF is an UNDEF.
|
|
if (N1.getOpcode() == ISD::UNDEF)
|
|
return getNode(ISD::UNDEF, VT);
|
|
|
|
// EXTRACT_VECTOR_ELT of CONCAT_VECTORS is often formed while lowering is
|
|
// expanding copies of large vectors from registers.
|
|
if (N1.getOpcode() == ISD::CONCAT_VECTORS &&
|
|
N1.getNumOperands() > 0) {
|
|
unsigned Factor =
|
|
N1.getOperand(0).getValueType().getVectorNumElements();
|
|
return getNode(ISD::EXTRACT_VECTOR_ELT, VT,
|
|
N1.getOperand(N2C->getValue() / Factor),
|
|
getConstant(N2C->getValue() % Factor, N2.getValueType()));
|
|
}
|
|
|
|
// EXTRACT_VECTOR_ELT of BUILD_VECTOR is often formed while lowering is
|
|
// expanding large vector constants.
|
|
if (N1.getOpcode() == ISD::BUILD_VECTOR)
|
|
return N1.getOperand(N2C->getValue());
|
|
|
|
// EXTRACT_VECTOR_ELT of INSERT_VECTOR_ELT is often formed when vector
|
|
// operations are lowered to scalars.
|
|
if (N1.getOpcode() == ISD::INSERT_VECTOR_ELT)
|
|
if (ConstantSDNode *IEC = dyn_cast<ConstantSDNode>(N1.getOperand(2))) {
|
|
if (IEC == N2C)
|
|
return N1.getOperand(1);
|
|
else
|
|
return getNode(ISD::EXTRACT_VECTOR_ELT, VT, N1.getOperand(0), N2);
|
|
}
|
|
break;
|
|
case ISD::EXTRACT_ELEMENT:
|
|
assert(N2C && (unsigned)N2C->getValue() < 2 && "Bad EXTRACT_ELEMENT!");
|
|
assert(!N1.getValueType().isVector() && !VT.isVector() &&
|
|
(N1.getValueType().isInteger() == VT.isInteger()) &&
|
|
"Wrong types for EXTRACT_ELEMENT!");
|
|
|
|
// EXTRACT_ELEMENT of BUILD_PAIR is often formed while legalize is expanding
|
|
// 64-bit integers into 32-bit parts. Instead of building the extract of
|
|
// the BUILD_PAIR, only to have legalize rip it apart, just do it now.
|
|
if (N1.getOpcode() == ISD::BUILD_PAIR)
|
|
return N1.getOperand(N2C->getValue());
|
|
|
|
// EXTRACT_ELEMENT of a constant int is also very common.
|
|
if (ConstantSDNode *C = dyn_cast<ConstantSDNode>(N1)) {
|
|
unsigned ElementSize = VT.getSizeInBits();
|
|
unsigned Shift = ElementSize * N2C->getValue();
|
|
APInt ShiftedVal = C->getAPIntValue().lshr(Shift);
|
|
return getConstant(ShiftedVal.trunc(ElementSize), VT);
|
|
}
|
|
break;
|
|
case ISD::EXTRACT_SUBVECTOR:
|
|
if (N1.getValueType() == VT) // Trivial extraction.
|
|
return N1;
|
|
break;
|
|
}
|
|
|
|
if (N1C) {
|
|
if (N2C) {
|
|
APInt C1 = N1C->getAPIntValue(), C2 = N2C->getAPIntValue();
|
|
switch (Opcode) {
|
|
case ISD::ADD: return getConstant(C1 + C2, VT);
|
|
case ISD::SUB: return getConstant(C1 - C2, VT);
|
|
case ISD::MUL: return getConstant(C1 * C2, VT);
|
|
case ISD::UDIV:
|
|
if (C2.getBoolValue()) return getConstant(C1.udiv(C2), VT);
|
|
break;
|
|
case ISD::UREM :
|
|
if (C2.getBoolValue()) return getConstant(C1.urem(C2), VT);
|
|
break;
|
|
case ISD::SDIV :
|
|
if (C2.getBoolValue()) return getConstant(C1.sdiv(C2), VT);
|
|
break;
|
|
case ISD::SREM :
|
|
if (C2.getBoolValue()) return getConstant(C1.srem(C2), VT);
|
|
break;
|
|
case ISD::AND : return getConstant(C1 & C2, VT);
|
|
case ISD::OR : return getConstant(C1 | C2, VT);
|
|
case ISD::XOR : return getConstant(C1 ^ C2, VT);
|
|
case ISD::SHL : return getConstant(C1 << C2, VT);
|
|
case ISD::SRL : return getConstant(C1.lshr(C2), VT);
|
|
case ISD::SRA : return getConstant(C1.ashr(C2), VT);
|
|
case ISD::ROTL : return getConstant(C1.rotl(C2), VT);
|
|
case ISD::ROTR : return getConstant(C1.rotr(C2), VT);
|
|
default: break;
|
|
}
|
|
} else { // Cannonicalize constant to RHS if commutative
|
|
if (isCommutativeBinOp(Opcode)) {
|
|
std::swap(N1C, N2C);
|
|
std::swap(N1, N2);
|
|
}
|
|
}
|
|
}
|
|
|
|
// Constant fold FP operations.
|
|
ConstantFPSDNode *N1CFP = dyn_cast<ConstantFPSDNode>(N1.Val);
|
|
ConstantFPSDNode *N2CFP = dyn_cast<ConstantFPSDNode>(N2.Val);
|
|
if (N1CFP) {
|
|
if (!N2CFP && isCommutativeBinOp(Opcode)) {
|
|
// Cannonicalize constant to RHS if commutative
|
|
std::swap(N1CFP, N2CFP);
|
|
std::swap(N1, N2);
|
|
} else if (N2CFP && VT != MVT::ppcf128) {
|
|
APFloat V1 = N1CFP->getValueAPF(), V2 = N2CFP->getValueAPF();
|
|
APFloat::opStatus s;
|
|
switch (Opcode) {
|
|
case ISD::FADD:
|
|
s = V1.add(V2, APFloat::rmNearestTiesToEven);
|
|
if (s != APFloat::opInvalidOp)
|
|
return getConstantFP(V1, VT);
|
|
break;
|
|
case ISD::FSUB:
|
|
s = V1.subtract(V2, APFloat::rmNearestTiesToEven);
|
|
if (s!=APFloat::opInvalidOp)
|
|
return getConstantFP(V1, VT);
|
|
break;
|
|
case ISD::FMUL:
|
|
s = V1.multiply(V2, APFloat::rmNearestTiesToEven);
|
|
if (s!=APFloat::opInvalidOp)
|
|
return getConstantFP(V1, VT);
|
|
break;
|
|
case ISD::FDIV:
|
|
s = V1.divide(V2, APFloat::rmNearestTiesToEven);
|
|
if (s!=APFloat::opInvalidOp && s!=APFloat::opDivByZero)
|
|
return getConstantFP(V1, VT);
|
|
break;
|
|
case ISD::FREM :
|
|
s = V1.mod(V2, APFloat::rmNearestTiesToEven);
|
|
if (s!=APFloat::opInvalidOp && s!=APFloat::opDivByZero)
|
|
return getConstantFP(V1, VT);
|
|
break;
|
|
case ISD::FCOPYSIGN:
|
|
V1.copySign(V2);
|
|
return getConstantFP(V1, VT);
|
|
default: break;
|
|
}
|
|
}
|
|
}
|
|
|
|
// Canonicalize an UNDEF to the RHS, even over a constant.
|
|
if (N1.getOpcode() == ISD::UNDEF) {
|
|
if (isCommutativeBinOp(Opcode)) {
|
|
std::swap(N1, N2);
|
|
} else {
|
|
switch (Opcode) {
|
|
case ISD::FP_ROUND_INREG:
|
|
case ISD::SIGN_EXTEND_INREG:
|
|
case ISD::SUB:
|
|
case ISD::FSUB:
|
|
case ISD::FDIV:
|
|
case ISD::FREM:
|
|
case ISD::SRA:
|
|
return N1; // fold op(undef, arg2) -> undef
|
|
case ISD::UDIV:
|
|
case ISD::SDIV:
|
|
case ISD::UREM:
|
|
case ISD::SREM:
|
|
case ISD::SRL:
|
|
case ISD::SHL:
|
|
if (!VT.isVector())
|
|
return getConstant(0, VT); // fold op(undef, arg2) -> 0
|
|
// For vectors, we can't easily build an all zero vector, just return
|
|
// the LHS.
|
|
return N2;
|
|
}
|
|
}
|
|
}
|
|
|
|
// Fold a bunch of operators when the RHS is undef.
|
|
if (N2.getOpcode() == ISD::UNDEF) {
|
|
switch (Opcode) {
|
|
case ISD::XOR:
|
|
if (N1.getOpcode() == ISD::UNDEF)
|
|
// Handle undef ^ undef -> 0 special case. This is a common
|
|
// idiom (misuse).
|
|
return getConstant(0, VT);
|
|
// fallthrough
|
|
case ISD::ADD:
|
|
case ISD::ADDC:
|
|
case ISD::ADDE:
|
|
case ISD::SUB:
|
|
case ISD::FADD:
|
|
case ISD::FSUB:
|
|
case ISD::FMUL:
|
|
case ISD::FDIV:
|
|
case ISD::FREM:
|
|
case ISD::UDIV:
|
|
case ISD::SDIV:
|
|
case ISD::UREM:
|
|
case ISD::SREM:
|
|
return N2; // fold op(arg1, undef) -> undef
|
|
case ISD::MUL:
|
|
case ISD::AND:
|
|
case ISD::SRL:
|
|
case ISD::SHL:
|
|
if (!VT.isVector())
|
|
return getConstant(0, VT); // fold op(arg1, undef) -> 0
|
|
// For vectors, we can't easily build an all zero vector, just return
|
|
// the LHS.
|
|
return N1;
|
|
case ISD::OR:
|
|
if (!VT.isVector())
|
|
return getConstant(VT.getIntegerVTBitMask(), VT);
|
|
// For vectors, we can't easily build an all one vector, just return
|
|
// the LHS.
|
|
return N1;
|
|
case ISD::SRA:
|
|
return N1;
|
|
}
|
|
}
|
|
|
|
// Memoize this node if possible.
|
|
SDNode *N;
|
|
SDVTList VTs = getVTList(VT);
|
|
if (VT != MVT::Flag) {
|
|
SDOperand Ops[] = { N1, N2 };
|
|
FoldingSetNodeID ID;
|
|
AddNodeIDNode(ID, Opcode, VTs, Ops, 2);
|
|
void *IP = 0;
|
|
if (SDNode *E = CSEMap.FindNodeOrInsertPos(ID, IP))
|
|
return SDOperand(E, 0);
|
|
N = new BinarySDNode(Opcode, VTs, N1, N2);
|
|
CSEMap.InsertNode(N, IP);
|
|
} else {
|
|
N = new BinarySDNode(Opcode, VTs, N1, N2);
|
|
}
|
|
|
|
AllNodes.push_back(N);
|
|
return SDOperand(N, 0);
|
|
}
|
|
|
|
SDOperand SelectionDAG::getNode(unsigned Opcode, MVT VT,
|
|
SDOperand N1, SDOperand N2, SDOperand N3) {
|
|
// Perform various simplifications.
|
|
ConstantSDNode *N1C = dyn_cast<ConstantSDNode>(N1.Val);
|
|
ConstantSDNode *N2C = dyn_cast<ConstantSDNode>(N2.Val);
|
|
switch (Opcode) {
|
|
case ISD::SETCC: {
|
|
// Use FoldSetCC to simplify SETCC's.
|
|
SDOperand Simp = FoldSetCC(VT, N1, N2, cast<CondCodeSDNode>(N3)->get());
|
|
if (Simp.Val) return Simp;
|
|
break;
|
|
}
|
|
case ISD::SELECT:
|
|
if (N1C) {
|
|
if (N1C->getValue())
|
|
return N2; // select true, X, Y -> X
|
|
else
|
|
return N3; // select false, X, Y -> Y
|
|
}
|
|
|
|
if (N2 == N3) return N2; // select C, X, X -> X
|
|
break;
|
|
case ISD::BRCOND:
|
|
if (N2C) {
|
|
if (N2C->getValue()) // Unconditional branch
|
|
return getNode(ISD::BR, MVT::Other, N1, N3);
|
|
else
|
|
return N1; // Never-taken branch
|
|
}
|
|
break;
|
|
case ISD::VECTOR_SHUFFLE:
|
|
assert(VT == N1.getValueType() && VT == N2.getValueType() &&
|
|
VT.isVector() && N3.getValueType().isVector() &&
|
|
N3.getOpcode() == ISD::BUILD_VECTOR &&
|
|
VT.getVectorNumElements() == N3.getNumOperands() &&
|
|
"Illegal VECTOR_SHUFFLE node!");
|
|
break;
|
|
case ISD::BIT_CONVERT:
|
|
// Fold bit_convert nodes from a type to themselves.
|
|
if (N1.getValueType() == VT)
|
|
return N1;
|
|
break;
|
|
}
|
|
|
|
// Memoize node if it doesn't produce a flag.
|
|
SDNode *N;
|
|
SDVTList VTs = getVTList(VT);
|
|
if (VT != MVT::Flag) {
|
|
SDOperand Ops[] = { N1, N2, N3 };
|
|
FoldingSetNodeID ID;
|
|
AddNodeIDNode(ID, Opcode, VTs, Ops, 3);
|
|
void *IP = 0;
|
|
if (SDNode *E = CSEMap.FindNodeOrInsertPos(ID, IP))
|
|
return SDOperand(E, 0);
|
|
N = new TernarySDNode(Opcode, VTs, N1, N2, N3);
|
|
CSEMap.InsertNode(N, IP);
|
|
} else {
|
|
N = new TernarySDNode(Opcode, VTs, N1, N2, N3);
|
|
}
|
|
AllNodes.push_back(N);
|
|
return SDOperand(N, 0);
|
|
}
|
|
|
|
SDOperand SelectionDAG::getNode(unsigned Opcode, MVT VT,
|
|
SDOperand N1, SDOperand N2, SDOperand N3,
|
|
SDOperand N4) {
|
|
SDOperand Ops[] = { N1, N2, N3, N4 };
|
|
return getNode(Opcode, VT, Ops, 4);
|
|
}
|
|
|
|
SDOperand SelectionDAG::getNode(unsigned Opcode, MVT VT,
|
|
SDOperand N1, SDOperand N2, SDOperand N3,
|
|
SDOperand N4, SDOperand N5) {
|
|
SDOperand Ops[] = { N1, N2, N3, N4, N5 };
|
|
return getNode(Opcode, VT, Ops, 5);
|
|
}
|
|
|
|
/// getMemsetValue - Vectorized representation of the memset value
|
|
/// operand.
|
|
static SDOperand getMemsetValue(SDOperand Value, MVT VT, SelectionDAG &DAG) {
|
|
unsigned NumBits = VT.isVector() ?
|
|
VT.getVectorElementType().getSizeInBits() : VT.getSizeInBits();
|
|
if (ConstantSDNode *C = dyn_cast<ConstantSDNode>(Value)) {
|
|
APInt Val = APInt(NumBits, C->getValue() & 255);
|
|
unsigned Shift = 8;
|
|
for (unsigned i = NumBits; i > 8; i >>= 1) {
|
|
Val = (Val << Shift) | Val;
|
|
Shift <<= 1;
|
|
}
|
|
if (VT.isInteger())
|
|
return DAG.getConstant(Val, VT);
|
|
return DAG.getConstantFP(APFloat(Val), VT);
|
|
}
|
|
|
|
Value = DAG.getNode(ISD::ZERO_EXTEND, VT, Value);
|
|
unsigned Shift = 8;
|
|
for (unsigned i = NumBits; i > 8; i >>= 1) {
|
|
Value = DAG.getNode(ISD::OR, VT,
|
|
DAG.getNode(ISD::SHL, VT, Value,
|
|
DAG.getConstant(Shift, MVT::i8)), Value);
|
|
Shift <<= 1;
|
|
}
|
|
|
|
return Value;
|
|
}
|
|
|
|
/// getMemsetStringVal - Similar to getMemsetValue. Except this is only
|
|
/// used when a memcpy is turned into a memset when the source is a constant
|
|
/// string ptr.
|
|
static SDOperand getMemsetStringVal(MVT VT, SelectionDAG &DAG,
|
|
const TargetLowering &TLI,
|
|
std::string &Str, unsigned Offset) {
|
|
assert(!VT.isVector() && "Can't handle vector type here!");
|
|
unsigned NumBits = VT.getSizeInBits();
|
|
unsigned MSB = NumBits / 8;
|
|
uint64_t Val = 0;
|
|
if (TLI.isLittleEndian())
|
|
Offset = Offset + MSB - 1;
|
|
for (unsigned i = 0; i != MSB; ++i) {
|
|
Val = (Val << 8) | (unsigned char)Str[Offset];
|
|
Offset += TLI.isLittleEndian() ? -1 : 1;
|
|
}
|
|
return DAG.getConstant(Val, VT);
|
|
}
|
|
|
|
/// getMemBasePlusOffset - Returns base and offset node for the
|
|
///
|
|
static SDOperand getMemBasePlusOffset(SDOperand Base, unsigned Offset,
|
|
SelectionDAG &DAG) {
|
|
MVT VT = Base.getValueType();
|
|
return DAG.getNode(ISD::ADD, VT, Base, DAG.getConstant(Offset, VT));
|
|
}
|
|
|
|
/// isMemSrcFromString - Returns true if memcpy source is a string constant.
|
|
///
|
|
static bool isMemSrcFromString(SDOperand Src, std::string &Str,
|
|
uint64_t &SrcOff) {
|
|
unsigned SrcDelta = 0;
|
|
GlobalAddressSDNode *G = NULL;
|
|
if (Src.getOpcode() == ISD::GlobalAddress)
|
|
G = cast<GlobalAddressSDNode>(Src);
|
|
else if (Src.getOpcode() == ISD::ADD &&
|
|
Src.getOperand(0).getOpcode() == ISD::GlobalAddress &&
|
|
Src.getOperand(1).getOpcode() == ISD::Constant) {
|
|
G = cast<GlobalAddressSDNode>(Src.getOperand(0));
|
|
SrcDelta = cast<ConstantSDNode>(Src.getOperand(1))->getValue();
|
|
}
|
|
if (!G)
|
|
return false;
|
|
|
|
GlobalVariable *GV = dyn_cast<GlobalVariable>(G->getGlobal());
|
|
if (GV && GV->isConstant()) {
|
|
Str = GV->getStringValue(false);
|
|
if (!Str.empty()) {
|
|
SrcOff += SrcDelta;
|
|
return true;
|
|
}
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
/// MeetsMaxMemopRequirement - Determines if the number of memory ops required
|
|
/// to replace the memset / memcpy is below the threshold. It also returns the
|
|
/// types of the sequence of memory ops to perform memset / memcpy.
|
|
static
|
|
bool MeetsMaxMemopRequirement(std::vector<MVT> &MemOps,
|
|
SDOperand Dst, SDOperand Src,
|
|
unsigned Limit, uint64_t Size, unsigned &Align,
|
|
SelectionDAG &DAG,
|
|
const TargetLowering &TLI) {
|
|
bool AllowUnalign = TLI.allowsUnalignedMemoryAccesses();
|
|
|
|
std::string Str;
|
|
uint64_t SrcOff = 0;
|
|
bool isSrcStr = isMemSrcFromString(Src, Str, SrcOff);
|
|
bool isSrcConst = isa<ConstantSDNode>(Src);
|
|
MVT VT= TLI.getOptimalMemOpType(Size, Align, isSrcConst, isSrcStr);
|
|
if (VT != MVT::iAny) {
|
|
unsigned NewAlign = (unsigned)
|
|
TLI.getTargetData()->getABITypeAlignment(VT.getTypeForMVT());
|
|
// If source is a string constant, this will require an unaligned load.
|
|
if (NewAlign > Align && (isSrcConst || AllowUnalign)) {
|
|
if (Dst.getOpcode() != ISD::FrameIndex) {
|
|
// Can't change destination alignment. It requires a unaligned store.
|
|
if (AllowUnalign)
|
|
VT = MVT::iAny;
|
|
} else {
|
|
int FI = cast<FrameIndexSDNode>(Dst)->getIndex();
|
|
MachineFrameInfo *MFI = DAG.getMachineFunction().getFrameInfo();
|
|
if (MFI->isFixedObjectIndex(FI)) {
|
|
// Can't change destination alignment. It requires a unaligned store.
|
|
if (AllowUnalign)
|
|
VT = MVT::iAny;
|
|
} else {
|
|
// Give the stack frame object a larger alignment if needed.
|
|
if (MFI->getObjectAlignment(FI) < NewAlign)
|
|
MFI->setObjectAlignment(FI, NewAlign);
|
|
Align = NewAlign;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
if (VT == MVT::iAny) {
|
|
if (AllowUnalign) {
|
|
VT = MVT::i64;
|
|
} else {
|
|
switch (Align & 7) {
|
|
case 0: VT = MVT::i64; break;
|
|
case 4: VT = MVT::i32; break;
|
|
case 2: VT = MVT::i16; break;
|
|
default: VT = MVT::i8; break;
|
|
}
|
|
}
|
|
|
|
MVT LVT = MVT::i64;
|
|
while (!TLI.isTypeLegal(LVT))
|
|
LVT = (MVT::SimpleValueType)(LVT.getSimpleVT() - 1);
|
|
assert(LVT.isInteger());
|
|
|
|
if (VT.bitsGT(LVT))
|
|
VT = LVT;
|
|
}
|
|
|
|
unsigned NumMemOps = 0;
|
|
while (Size != 0) {
|
|
unsigned VTSize = VT.getSizeInBits() / 8;
|
|
while (VTSize > Size) {
|
|
// For now, only use non-vector load / store's for the left-over pieces.
|
|
if (VT.isVector()) {
|
|
VT = MVT::i64;
|
|
while (!TLI.isTypeLegal(VT))
|
|
VT = (MVT::SimpleValueType)(VT.getSimpleVT() - 1);
|
|
VTSize = VT.getSizeInBits() / 8;
|
|
} else {
|
|
VT = (MVT::SimpleValueType)(VT.getSimpleVT() - 1);
|
|
VTSize >>= 1;
|
|
}
|
|
}
|
|
|
|
if (++NumMemOps > Limit)
|
|
return false;
|
|
MemOps.push_back(VT);
|
|
Size -= VTSize;
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
static SDOperand getMemcpyLoadsAndStores(SelectionDAG &DAG,
|
|
SDOperand Chain, SDOperand Dst,
|
|
SDOperand Src, uint64_t Size,
|
|
unsigned Align, bool AlwaysInline,
|
|
const Value *DstSV, uint64_t DstSVOff,
|
|
const Value *SrcSV, uint64_t SrcSVOff){
|
|
const TargetLowering &TLI = DAG.getTargetLoweringInfo();
|
|
|
|
// Expand memcpy to a series of load and store ops if the size operand falls
|
|
// below a certain threshold.
|
|
std::vector<MVT> MemOps;
|
|
uint64_t Limit = -1;
|
|
if (!AlwaysInline)
|
|
Limit = TLI.getMaxStoresPerMemcpy();
|
|
unsigned DstAlign = Align; // Destination alignment can change.
|
|
if (!MeetsMaxMemopRequirement(MemOps, Dst, Src, Limit, Size, DstAlign,
|
|
DAG, TLI))
|
|
return SDOperand();
|
|
|
|
std::string Str;
|
|
uint64_t SrcOff = 0, DstOff = 0;
|
|
bool CopyFromStr = isMemSrcFromString(Src, Str, SrcOff);
|
|
|
|
SmallVector<SDOperand, 8> OutChains;
|
|
unsigned NumMemOps = MemOps.size();
|
|
for (unsigned i = 0; i < NumMemOps; i++) {
|
|
MVT VT = MemOps[i];
|
|
unsigned VTSize = VT.getSizeInBits() / 8;
|
|
SDOperand Value, Store;
|
|
|
|
if (CopyFromStr && !VT.isVector()) {
|
|
// It's unlikely a store of a vector immediate can be done in a single
|
|
// instruction. It would require a load from a constantpool first.
|
|
// FIXME: Handle cases where store of vector immediate is done in a
|
|
// single instruction.
|
|
Value = getMemsetStringVal(VT, DAG, TLI, Str, SrcOff);
|
|
Store = DAG.getStore(Chain, Value,
|
|
getMemBasePlusOffset(Dst, DstOff, DAG),
|
|
DstSV, DstSVOff + DstOff);
|
|
} else {
|
|
Value = DAG.getLoad(VT, Chain,
|
|
getMemBasePlusOffset(Src, SrcOff, DAG),
|
|
SrcSV, SrcSVOff + SrcOff, false, Align);
|
|
Store = DAG.getStore(Chain, Value,
|
|
getMemBasePlusOffset(Dst, DstOff, DAG),
|
|
DstSV, DstSVOff + DstOff, false, DstAlign);
|
|
}
|
|
OutChains.push_back(Store);
|
|
SrcOff += VTSize;
|
|
DstOff += VTSize;
|
|
}
|
|
|
|
return DAG.getNode(ISD::TokenFactor, MVT::Other,
|
|
&OutChains[0], OutChains.size());
|
|
}
|
|
|
|
static SDOperand getMemmoveLoadsAndStores(SelectionDAG &DAG,
|
|
SDOperand Chain, SDOperand Dst,
|
|
SDOperand Src, uint64_t Size,
|
|
unsigned Align, bool AlwaysInline,
|
|
const Value *DstSV, uint64_t DstSVOff,
|
|
const Value *SrcSV, uint64_t SrcSVOff){
|
|
const TargetLowering &TLI = DAG.getTargetLoweringInfo();
|
|
|
|
// Expand memmove to a series of load and store ops if the size operand falls
|
|
// below a certain threshold.
|
|
std::vector<MVT> MemOps;
|
|
uint64_t Limit = -1;
|
|
if (!AlwaysInline)
|
|
Limit = TLI.getMaxStoresPerMemmove();
|
|
unsigned DstAlign = Align; // Destination alignment can change.
|
|
if (!MeetsMaxMemopRequirement(MemOps, Dst, Src, Limit, Size, DstAlign,
|
|
DAG, TLI))
|
|
return SDOperand();
|
|
|
|
uint64_t SrcOff = 0, DstOff = 0;
|
|
|
|
SmallVector<SDOperand, 8> LoadValues;
|
|
SmallVector<SDOperand, 8> LoadChains;
|
|
SmallVector<SDOperand, 8> OutChains;
|
|
unsigned NumMemOps = MemOps.size();
|
|
for (unsigned i = 0; i < NumMemOps; i++) {
|
|
MVT VT = MemOps[i];
|
|
unsigned VTSize = VT.getSizeInBits() / 8;
|
|
SDOperand Value, Store;
|
|
|
|
Value = DAG.getLoad(VT, Chain,
|
|
getMemBasePlusOffset(Src, SrcOff, DAG),
|
|
SrcSV, SrcSVOff + SrcOff, false, Align);
|
|
LoadValues.push_back(Value);
|
|
LoadChains.push_back(Value.getValue(1));
|
|
SrcOff += VTSize;
|
|
}
|
|
Chain = DAG.getNode(ISD::TokenFactor, MVT::Other,
|
|
&LoadChains[0], LoadChains.size());
|
|
OutChains.clear();
|
|
for (unsigned i = 0; i < NumMemOps; i++) {
|
|
MVT VT = MemOps[i];
|
|
unsigned VTSize = VT.getSizeInBits() / 8;
|
|
SDOperand Value, Store;
|
|
|
|
Store = DAG.getStore(Chain, LoadValues[i],
|
|
getMemBasePlusOffset(Dst, DstOff, DAG),
|
|
DstSV, DstSVOff + DstOff, false, DstAlign);
|
|
OutChains.push_back(Store);
|
|
DstOff += VTSize;
|
|
}
|
|
|
|
return DAG.getNode(ISD::TokenFactor, MVT::Other,
|
|
&OutChains[0], OutChains.size());
|
|
}
|
|
|
|
static SDOperand getMemsetStores(SelectionDAG &DAG,
|
|
SDOperand Chain, SDOperand Dst,
|
|
SDOperand Src, uint64_t Size,
|
|
unsigned Align,
|
|
const Value *DstSV, uint64_t DstSVOff) {
|
|
const TargetLowering &TLI = DAG.getTargetLoweringInfo();
|
|
|
|
// Expand memset to a series of load/store ops if the size operand
|
|
// falls below a certain threshold.
|
|
std::vector<MVT> MemOps;
|
|
if (!MeetsMaxMemopRequirement(MemOps, Dst, Src, TLI.getMaxStoresPerMemset(),
|
|
Size, Align, DAG, TLI))
|
|
return SDOperand();
|
|
|
|
SmallVector<SDOperand, 8> OutChains;
|
|
uint64_t DstOff = 0;
|
|
|
|
unsigned NumMemOps = MemOps.size();
|
|
for (unsigned i = 0; i < NumMemOps; i++) {
|
|
MVT VT = MemOps[i];
|
|
unsigned VTSize = VT.getSizeInBits() / 8;
|
|
SDOperand Value = getMemsetValue(Src, VT, DAG);
|
|
SDOperand Store = DAG.getStore(Chain, Value,
|
|
getMemBasePlusOffset(Dst, DstOff, DAG),
|
|
DstSV, DstSVOff + DstOff);
|
|
OutChains.push_back(Store);
|
|
DstOff += VTSize;
|
|
}
|
|
|
|
return DAG.getNode(ISD::TokenFactor, MVT::Other,
|
|
&OutChains[0], OutChains.size());
|
|
}
|
|
|
|
SDOperand SelectionDAG::getMemcpy(SDOperand Chain, SDOperand Dst,
|
|
SDOperand Src, SDOperand Size,
|
|
unsigned Align, bool AlwaysInline,
|
|
const Value *DstSV, uint64_t DstSVOff,
|
|
const Value *SrcSV, uint64_t SrcSVOff) {
|
|
|
|
// Check to see if we should lower the memcpy to loads and stores first.
|
|
// For cases within the target-specified limits, this is the best choice.
|
|
ConstantSDNode *ConstantSize = dyn_cast<ConstantSDNode>(Size);
|
|
if (ConstantSize) {
|
|
// Memcpy with size zero? Just return the original chain.
|
|
if (ConstantSize->isNullValue())
|
|
return Chain;
|
|
|
|
SDOperand Result =
|
|
getMemcpyLoadsAndStores(*this, Chain, Dst, Src, ConstantSize->getValue(),
|
|
Align, false, DstSV, DstSVOff, SrcSV, SrcSVOff);
|
|
if (Result.Val)
|
|
return Result;
|
|
}
|
|
|
|
// Then check to see if we should lower the memcpy with target-specific
|
|
// code. If the target chooses to do this, this is the next best.
|
|
SDOperand Result =
|
|
TLI.EmitTargetCodeForMemcpy(*this, Chain, Dst, Src, Size, Align,
|
|
AlwaysInline,
|
|
DstSV, DstSVOff, SrcSV, SrcSVOff);
|
|
if (Result.Val)
|
|
return Result;
|
|
|
|
// If we really need inline code and the target declined to provide it,
|
|
// use a (potentially long) sequence of loads and stores.
|
|
if (AlwaysInline) {
|
|
assert(ConstantSize && "AlwaysInline requires a constant size!");
|
|
return getMemcpyLoadsAndStores(*this, Chain, Dst, Src,
|
|
ConstantSize->getValue(), Align, true,
|
|
DstSV, DstSVOff, SrcSV, SrcSVOff);
|
|
}
|
|
|
|
// Emit a library call.
|
|
TargetLowering::ArgListTy Args;
|
|
TargetLowering::ArgListEntry Entry;
|
|
Entry.Ty = TLI.getTargetData()->getIntPtrType();
|
|
Entry.Node = Dst; Args.push_back(Entry);
|
|
Entry.Node = Src; Args.push_back(Entry);
|
|
Entry.Node = Size; Args.push_back(Entry);
|
|
std::pair<SDOperand,SDOperand> CallResult =
|
|
TLI.LowerCallTo(Chain, Type::VoidTy,
|
|
false, false, false, CallingConv::C, false,
|
|
getExternalSymbol("memcpy", TLI.getPointerTy()),
|
|
Args, *this);
|
|
return CallResult.second;
|
|
}
|
|
|
|
SDOperand SelectionDAG::getMemmove(SDOperand Chain, SDOperand Dst,
|
|
SDOperand Src, SDOperand Size,
|
|
unsigned Align,
|
|
const Value *DstSV, uint64_t DstSVOff,
|
|
const Value *SrcSV, uint64_t SrcSVOff) {
|
|
|
|
// Check to see if we should lower the memmove to loads and stores first.
|
|
// For cases within the target-specified limits, this is the best choice.
|
|
ConstantSDNode *ConstantSize = dyn_cast<ConstantSDNode>(Size);
|
|
if (ConstantSize) {
|
|
// Memmove with size zero? Just return the original chain.
|
|
if (ConstantSize->isNullValue())
|
|
return Chain;
|
|
|
|
SDOperand Result =
|
|
getMemmoveLoadsAndStores(*this, Chain, Dst, Src, ConstantSize->getValue(),
|
|
Align, false, DstSV, DstSVOff, SrcSV, SrcSVOff);
|
|
if (Result.Val)
|
|
return Result;
|
|
}
|
|
|
|
// Then check to see if we should lower the memmove with target-specific
|
|
// code. If the target chooses to do this, this is the next best.
|
|
SDOperand Result =
|
|
TLI.EmitTargetCodeForMemmove(*this, Chain, Dst, Src, Size, Align,
|
|
DstSV, DstSVOff, SrcSV, SrcSVOff);
|
|
if (Result.Val)
|
|
return Result;
|
|
|
|
// Emit a library call.
|
|
TargetLowering::ArgListTy Args;
|
|
TargetLowering::ArgListEntry Entry;
|
|
Entry.Ty = TLI.getTargetData()->getIntPtrType();
|
|
Entry.Node = Dst; Args.push_back(Entry);
|
|
Entry.Node = Src; Args.push_back(Entry);
|
|
Entry.Node = Size; Args.push_back(Entry);
|
|
std::pair<SDOperand,SDOperand> CallResult =
|
|
TLI.LowerCallTo(Chain, Type::VoidTy,
|
|
false, false, false, CallingConv::C, false,
|
|
getExternalSymbol("memmove", TLI.getPointerTy()),
|
|
Args, *this);
|
|
return CallResult.second;
|
|
}
|
|
|
|
SDOperand SelectionDAG::getMemset(SDOperand Chain, SDOperand Dst,
|
|
SDOperand Src, SDOperand Size,
|
|
unsigned Align,
|
|
const Value *DstSV, uint64_t DstSVOff) {
|
|
|
|
// Check to see if we should lower the memset to stores first.
|
|
// For cases within the target-specified limits, this is the best choice.
|
|
ConstantSDNode *ConstantSize = dyn_cast<ConstantSDNode>(Size);
|
|
if (ConstantSize) {
|
|
// Memset with size zero? Just return the original chain.
|
|
if (ConstantSize->isNullValue())
|
|
return Chain;
|
|
|
|
SDOperand Result =
|
|
getMemsetStores(*this, Chain, Dst, Src, ConstantSize->getValue(), Align,
|
|
DstSV, DstSVOff);
|
|
if (Result.Val)
|
|
return Result;
|
|
}
|
|
|
|
// Then check to see if we should lower the memset with target-specific
|
|
// code. If the target chooses to do this, this is the next best.
|
|
SDOperand Result =
|
|
TLI.EmitTargetCodeForMemset(*this, Chain, Dst, Src, Size, Align,
|
|
DstSV, DstSVOff);
|
|
if (Result.Val)
|
|
return Result;
|
|
|
|
// Emit a library call.
|
|
const Type *IntPtrTy = TLI.getTargetData()->getIntPtrType();
|
|
TargetLowering::ArgListTy Args;
|
|
TargetLowering::ArgListEntry Entry;
|
|
Entry.Node = Dst; Entry.Ty = IntPtrTy;
|
|
Args.push_back(Entry);
|
|
// Extend or truncate the argument to be an i32 value for the call.
|
|
if (Src.getValueType().bitsGT(MVT::i32))
|
|
Src = getNode(ISD::TRUNCATE, MVT::i32, Src);
|
|
else
|
|
Src = getNode(ISD::ZERO_EXTEND, MVT::i32, Src);
|
|
Entry.Node = Src; Entry.Ty = Type::Int32Ty; Entry.isSExt = true;
|
|
Args.push_back(Entry);
|
|
Entry.Node = Size; Entry.Ty = IntPtrTy; Entry.isSExt = false;
|
|
Args.push_back(Entry);
|
|
std::pair<SDOperand,SDOperand> CallResult =
|
|
TLI.LowerCallTo(Chain, Type::VoidTy,
|
|
false, false, false, CallingConv::C, false,
|
|
getExternalSymbol("memset", TLI.getPointerTy()),
|
|
Args, *this);
|
|
return CallResult.second;
|
|
}
|
|
|
|
SDOperand SelectionDAG::getAtomic(unsigned Opcode, SDOperand Chain,
|
|
SDOperand Ptr, SDOperand Cmp,
|
|
SDOperand Swp, const Value* PtrVal,
|
|
unsigned Alignment) {
|
|
assert(Opcode == ISD::ATOMIC_CMP_SWAP && "Invalid Atomic Op");
|
|
assert(Cmp.getValueType() == Swp.getValueType() && "Invalid Atomic Op Types");
|
|
SDVTList VTs = getVTList(Cmp.getValueType(), MVT::Other);
|
|
FoldingSetNodeID ID;
|
|
SDOperand Ops[] = {Chain, Ptr, Cmp, Swp};
|
|
AddNodeIDNode(ID, Opcode, VTs, Ops, 4);
|
|
void* IP = 0;
|
|
if (SDNode *E = CSEMap.FindNodeOrInsertPos(ID, IP))
|
|
return SDOperand(E, 0);
|
|
SDNode* N = new AtomicSDNode(Opcode, VTs, Chain, Ptr, Cmp, Swp,
|
|
PtrVal, Alignment);
|
|
CSEMap.InsertNode(N, IP);
|
|
AllNodes.push_back(N);
|
|
return SDOperand(N, 0);
|
|
}
|
|
|
|
SDOperand SelectionDAG::getAtomic(unsigned Opcode, SDOperand Chain,
|
|
SDOperand Ptr, SDOperand Val,
|
|
const Value* PtrVal,
|
|
unsigned Alignment) {
|
|
assert(( Opcode == ISD::ATOMIC_LOAD_ADD || Opcode == ISD::ATOMIC_LOAD_SUB
|
|
|| Opcode == ISD::ATOMIC_SWAP || Opcode == ISD::ATOMIC_LOAD_AND
|
|
|| Opcode == ISD::ATOMIC_LOAD_OR || Opcode == ISD::ATOMIC_LOAD_XOR
|
|
|| Opcode == ISD::ATOMIC_LOAD_NAND
|
|
|| Opcode == ISD::ATOMIC_LOAD_MIN || Opcode == ISD::ATOMIC_LOAD_MAX
|
|
|| Opcode == ISD::ATOMIC_LOAD_UMIN || Opcode == ISD::ATOMIC_LOAD_UMAX)
|
|
&& "Invalid Atomic Op");
|
|
SDVTList VTs = getVTList(Val.getValueType(), MVT::Other);
|
|
FoldingSetNodeID ID;
|
|
SDOperand Ops[] = {Chain, Ptr, Val};
|
|
AddNodeIDNode(ID, Opcode, VTs, Ops, 3);
|
|
void* IP = 0;
|
|
if (SDNode *E = CSEMap.FindNodeOrInsertPos(ID, IP))
|
|
return SDOperand(E, 0);
|
|
SDNode* N = new AtomicSDNode(Opcode, VTs, Chain, Ptr, Val,
|
|
PtrVal, Alignment);
|
|
CSEMap.InsertNode(N, IP);
|
|
AllNodes.push_back(N);
|
|
return SDOperand(N, 0);
|
|
}
|
|
|
|
SDOperand
|
|
SelectionDAG::getLoad(ISD::MemIndexedMode AM, ISD::LoadExtType ExtType,
|
|
MVT VT, SDOperand Chain,
|
|
SDOperand Ptr, SDOperand Offset,
|
|
const Value *SV, int SVOffset, MVT EVT,
|
|
bool isVolatile, unsigned Alignment) {
|
|
if (Alignment == 0) { // Ensure that codegen never sees alignment 0
|
|
const Type *Ty = 0;
|
|
if (VT != MVT::iPTR) {
|
|
Ty = VT.getTypeForMVT();
|
|
} else if (SV) {
|
|
const PointerType *PT = dyn_cast<PointerType>(SV->getType());
|
|
assert(PT && "Value for load must be a pointer");
|
|
Ty = PT->getElementType();
|
|
}
|
|
assert(Ty && "Could not get type information for load");
|
|
Alignment = TLI.getTargetData()->getABITypeAlignment(Ty);
|
|
}
|
|
|
|
if (VT == EVT) {
|
|
ExtType = ISD::NON_EXTLOAD;
|
|
} else if (ExtType == ISD::NON_EXTLOAD) {
|
|
assert(VT == EVT && "Non-extending load from different memory type!");
|
|
} else {
|
|
// Extending load.
|
|
if (VT.isVector())
|
|
assert(EVT == VT.getVectorElementType() && "Invalid vector extload!");
|
|
else
|
|
assert(EVT.bitsLT(VT) &&
|
|
"Should only be an extending load, not truncating!");
|
|
assert((ExtType == ISD::EXTLOAD || VT.isInteger()) &&
|
|
"Cannot sign/zero extend a FP/Vector load!");
|
|
assert(VT.isInteger() == EVT.isInteger() &&
|
|
"Cannot convert from FP to Int or Int -> FP!");
|
|
}
|
|
|
|
bool Indexed = AM != ISD::UNINDEXED;
|
|
assert((Indexed || Offset.getOpcode() == ISD::UNDEF) &&
|
|
"Unindexed load with an offset!");
|
|
|
|
SDVTList VTs = Indexed ?
|
|
getVTList(VT, Ptr.getValueType(), MVT::Other) : getVTList(VT, MVT::Other);
|
|
SDOperand Ops[] = { Chain, Ptr, Offset };
|
|
FoldingSetNodeID ID;
|
|
AddNodeIDNode(ID, ISD::LOAD, VTs, Ops, 3);
|
|
ID.AddInteger(AM);
|
|
ID.AddInteger(ExtType);
|
|
ID.AddInteger(EVT.getRawBits());
|
|
ID.AddInteger(Alignment);
|
|
ID.AddInteger(isVolatile);
|
|
void *IP = 0;
|
|
if (SDNode *E = CSEMap.FindNodeOrInsertPos(ID, IP))
|
|
return SDOperand(E, 0);
|
|
SDNode *N = new LoadSDNode(Ops, VTs, AM, ExtType, EVT, SV, SVOffset,
|
|
Alignment, isVolatile);
|
|
CSEMap.InsertNode(N, IP);
|
|
AllNodes.push_back(N);
|
|
return SDOperand(N, 0);
|
|
}
|
|
|
|
SDOperand SelectionDAG::getLoad(MVT VT,
|
|
SDOperand Chain, SDOperand Ptr,
|
|
const Value *SV, int SVOffset,
|
|
bool isVolatile, unsigned Alignment) {
|
|
SDOperand Undef = getNode(ISD::UNDEF, Ptr.getValueType());
|
|
return getLoad(ISD::UNINDEXED, ISD::NON_EXTLOAD, VT, Chain, Ptr, Undef,
|
|
SV, SVOffset, VT, isVolatile, Alignment);
|
|
}
|
|
|
|
SDOperand SelectionDAG::getExtLoad(ISD::LoadExtType ExtType, MVT VT,
|
|
SDOperand Chain, SDOperand Ptr,
|
|
const Value *SV,
|
|
int SVOffset, MVT EVT,
|
|
bool isVolatile, unsigned Alignment) {
|
|
SDOperand Undef = getNode(ISD::UNDEF, Ptr.getValueType());
|
|
return getLoad(ISD::UNINDEXED, ExtType, VT, Chain, Ptr, Undef,
|
|
SV, SVOffset, EVT, isVolatile, Alignment);
|
|
}
|
|
|
|
SDOperand
|
|
SelectionDAG::getIndexedLoad(SDOperand OrigLoad, SDOperand Base,
|
|
SDOperand Offset, ISD::MemIndexedMode AM) {
|
|
LoadSDNode *LD = cast<LoadSDNode>(OrigLoad);
|
|
assert(LD->getOffset().getOpcode() == ISD::UNDEF &&
|
|
"Load is already a indexed load!");
|
|
return getLoad(AM, LD->getExtensionType(), OrigLoad.getValueType(),
|
|
LD->getChain(), Base, Offset, LD->getSrcValue(),
|
|
LD->getSrcValueOffset(), LD->getMemoryVT(),
|
|
LD->isVolatile(), LD->getAlignment());
|
|
}
|
|
|
|
SDOperand SelectionDAG::getStore(SDOperand Chain, SDOperand Val,
|
|
SDOperand Ptr, const Value *SV, int SVOffset,
|
|
bool isVolatile, unsigned Alignment) {
|
|
MVT VT = Val.getValueType();
|
|
|
|
if (Alignment == 0) { // Ensure that codegen never sees alignment 0
|
|
const Type *Ty = 0;
|
|
if (VT != MVT::iPTR) {
|
|
Ty = VT.getTypeForMVT();
|
|
} else if (SV) {
|
|
const PointerType *PT = dyn_cast<PointerType>(SV->getType());
|
|
assert(PT && "Value for store must be a pointer");
|
|
Ty = PT->getElementType();
|
|
}
|
|
assert(Ty && "Could not get type information for store");
|
|
Alignment = TLI.getTargetData()->getABITypeAlignment(Ty);
|
|
}
|
|
SDVTList VTs = getVTList(MVT::Other);
|
|
SDOperand Undef = getNode(ISD::UNDEF, Ptr.getValueType());
|
|
SDOperand Ops[] = { Chain, Val, Ptr, Undef };
|
|
FoldingSetNodeID ID;
|
|
AddNodeIDNode(ID, ISD::STORE, VTs, Ops, 4);
|
|
ID.AddInteger(ISD::UNINDEXED);
|
|
ID.AddInteger(false);
|
|
ID.AddInteger(VT.getRawBits());
|
|
ID.AddInteger(Alignment);
|
|
ID.AddInteger(isVolatile);
|
|
void *IP = 0;
|
|
if (SDNode *E = CSEMap.FindNodeOrInsertPos(ID, IP))
|
|
return SDOperand(E, 0);
|
|
SDNode *N = new StoreSDNode(Ops, VTs, ISD::UNINDEXED, false,
|
|
VT, SV, SVOffset, Alignment, isVolatile);
|
|
CSEMap.InsertNode(N, IP);
|
|
AllNodes.push_back(N);
|
|
return SDOperand(N, 0);
|
|
}
|
|
|
|
SDOperand SelectionDAG::getTruncStore(SDOperand Chain, SDOperand Val,
|
|
SDOperand Ptr, const Value *SV,
|
|
int SVOffset, MVT SVT,
|
|
bool isVolatile, unsigned Alignment) {
|
|
MVT VT = Val.getValueType();
|
|
|
|
if (VT == SVT)
|
|
return getStore(Chain, Val, Ptr, SV, SVOffset, isVolatile, Alignment);
|
|
|
|
assert(VT.bitsGT(SVT) && "Not a truncation?");
|
|
assert(VT.isInteger() == SVT.isInteger() &&
|
|
"Can't do FP-INT conversion!");
|
|
|
|
if (Alignment == 0) { // Ensure that codegen never sees alignment 0
|
|
const Type *Ty = 0;
|
|
if (VT != MVT::iPTR) {
|
|
Ty = VT.getTypeForMVT();
|
|
} else if (SV) {
|
|
const PointerType *PT = dyn_cast<PointerType>(SV->getType());
|
|
assert(PT && "Value for store must be a pointer");
|
|
Ty = PT->getElementType();
|
|
}
|
|
assert(Ty && "Could not get type information for store");
|
|
Alignment = TLI.getTargetData()->getABITypeAlignment(Ty);
|
|
}
|
|
SDVTList VTs = getVTList(MVT::Other);
|
|
SDOperand Undef = getNode(ISD::UNDEF, Ptr.getValueType());
|
|
SDOperand Ops[] = { Chain, Val, Ptr, Undef };
|
|
FoldingSetNodeID ID;
|
|
AddNodeIDNode(ID, ISD::STORE, VTs, Ops, 4);
|
|
ID.AddInteger(ISD::UNINDEXED);
|
|
ID.AddInteger(1);
|
|
ID.AddInteger(SVT.getRawBits());
|
|
ID.AddInteger(Alignment);
|
|
ID.AddInteger(isVolatile);
|
|
void *IP = 0;
|
|
if (SDNode *E = CSEMap.FindNodeOrInsertPos(ID, IP))
|
|
return SDOperand(E, 0);
|
|
SDNode *N = new StoreSDNode(Ops, VTs, ISD::UNINDEXED, true,
|
|
SVT, SV, SVOffset, Alignment, isVolatile);
|
|
CSEMap.InsertNode(N, IP);
|
|
AllNodes.push_back(N);
|
|
return SDOperand(N, 0);
|
|
}
|
|
|
|
SDOperand
|
|
SelectionDAG::getIndexedStore(SDOperand OrigStore, SDOperand Base,
|
|
SDOperand Offset, ISD::MemIndexedMode AM) {
|
|
StoreSDNode *ST = cast<StoreSDNode>(OrigStore);
|
|
assert(ST->getOffset().getOpcode() == ISD::UNDEF &&
|
|
"Store is already a indexed store!");
|
|
SDVTList VTs = getVTList(Base.getValueType(), MVT::Other);
|
|
SDOperand Ops[] = { ST->getChain(), ST->getValue(), Base, Offset };
|
|
FoldingSetNodeID ID;
|
|
AddNodeIDNode(ID, ISD::STORE, VTs, Ops, 4);
|
|
ID.AddInteger(AM);
|
|
ID.AddInteger(ST->isTruncatingStore());
|
|
ID.AddInteger(ST->getMemoryVT().getRawBits());
|
|
ID.AddInteger(ST->getAlignment());
|
|
ID.AddInteger(ST->isVolatile());
|
|
void *IP = 0;
|
|
if (SDNode *E = CSEMap.FindNodeOrInsertPos(ID, IP))
|
|
return SDOperand(E, 0);
|
|
SDNode *N = new StoreSDNode(Ops, VTs, AM,
|
|
ST->isTruncatingStore(), ST->getMemoryVT(),
|
|
ST->getSrcValue(), ST->getSrcValueOffset(),
|
|
ST->getAlignment(), ST->isVolatile());
|
|
CSEMap.InsertNode(N, IP);
|
|
AllNodes.push_back(N);
|
|
return SDOperand(N, 0);
|
|
}
|
|
|
|
SDOperand SelectionDAG::getVAArg(MVT VT,
|
|
SDOperand Chain, SDOperand Ptr,
|
|
SDOperand SV) {
|
|
SDOperand Ops[] = { Chain, Ptr, SV };
|
|
return getNode(ISD::VAARG, getVTList(VT, MVT::Other), Ops, 3);
|
|
}
|
|
|
|
SDOperand SelectionDAG::getNode(unsigned Opcode, MVT VT,
|
|
SDOperandPtr Ops, unsigned NumOps) {
|
|
switch (NumOps) {
|
|
case 0: return getNode(Opcode, VT);
|
|
case 1: return getNode(Opcode, VT, Ops[0]);
|
|
case 2: return getNode(Opcode, VT, Ops[0], Ops[1]);
|
|
case 3: return getNode(Opcode, VT, Ops[0], Ops[1], Ops[2]);
|
|
default: break;
|
|
}
|
|
|
|
switch (Opcode) {
|
|
default: break;
|
|
case ISD::SELECT_CC: {
|
|
assert(NumOps == 5 && "SELECT_CC takes 5 operands!");
|
|
assert(Ops[0].getValueType() == Ops[1].getValueType() &&
|
|
"LHS and RHS of condition must have same type!");
|
|
assert(Ops[2].getValueType() == Ops[3].getValueType() &&
|
|
"True and False arms of SelectCC must have same type!");
|
|
assert(Ops[2].getValueType() == VT &&
|
|
"select_cc node must be of same type as true and false value!");
|
|
break;
|
|
}
|
|
case ISD::BR_CC: {
|
|
assert(NumOps == 5 && "BR_CC takes 5 operands!");
|
|
assert(Ops[2].getValueType() == Ops[3].getValueType() &&
|
|
"LHS/RHS of comparison should match types!");
|
|
break;
|
|
}
|
|
}
|
|
|
|
// Memoize nodes.
|
|
SDNode *N;
|
|
SDVTList VTs = getVTList(VT);
|
|
if (VT != MVT::Flag) {
|
|
FoldingSetNodeID ID;
|
|
AddNodeIDNode(ID, Opcode, VTs, Ops, NumOps);
|
|
void *IP = 0;
|
|
if (SDNode *E = CSEMap.FindNodeOrInsertPos(ID, IP))
|
|
return SDOperand(E, 0);
|
|
N = new SDNode(Opcode, VTs, Ops, NumOps);
|
|
CSEMap.InsertNode(N, IP);
|
|
} else {
|
|
N = new SDNode(Opcode, VTs, Ops, NumOps);
|
|
}
|
|
AllNodes.push_back(N);
|
|
return SDOperand(N, 0);
|
|
}
|
|
|
|
SDOperand SelectionDAG::getNode(unsigned Opcode,
|
|
std::vector<MVT> &ResultTys,
|
|
SDOperandPtr Ops, unsigned NumOps) {
|
|
return getNode(Opcode, getNodeValueTypes(ResultTys), ResultTys.size(),
|
|
Ops, NumOps);
|
|
}
|
|
|
|
SDOperand SelectionDAG::getNode(unsigned Opcode,
|
|
const MVT *VTs, unsigned NumVTs,
|
|
SDOperandPtr Ops, unsigned NumOps) {
|
|
if (NumVTs == 1)
|
|
return getNode(Opcode, VTs[0], Ops, NumOps);
|
|
return getNode(Opcode, makeVTList(VTs, NumVTs), Ops, NumOps);
|
|
}
|
|
|
|
SDOperand SelectionDAG::getNode(unsigned Opcode, SDVTList VTList,
|
|
SDOperandPtr Ops, unsigned NumOps) {
|
|
if (VTList.NumVTs == 1)
|
|
return getNode(Opcode, VTList.VTs[0], Ops, NumOps);
|
|
|
|
switch (Opcode) {
|
|
// FIXME: figure out how to safely handle things like
|
|
// int foo(int x) { return 1 << (x & 255); }
|
|
// int bar() { return foo(256); }
|
|
#if 0
|
|
case ISD::SRA_PARTS:
|
|
case ISD::SRL_PARTS:
|
|
case ISD::SHL_PARTS:
|
|
if (N3.getOpcode() == ISD::SIGN_EXTEND_INREG &&
|
|
cast<VTSDNode>(N3.getOperand(1))->getVT() != MVT::i1)
|
|
return getNode(Opcode, VT, N1, N2, N3.getOperand(0));
|
|
else if (N3.getOpcode() == ISD::AND)
|
|
if (ConstantSDNode *AndRHS = dyn_cast<ConstantSDNode>(N3.getOperand(1))) {
|
|
// If the and is only masking out bits that cannot effect the shift,
|
|
// eliminate the and.
|
|
unsigned NumBits = VT.getSizeInBits()*2;
|
|
if ((AndRHS->getValue() & (NumBits-1)) == NumBits-1)
|
|
return getNode(Opcode, VT, N1, N2, N3.getOperand(0));
|
|
}
|
|
break;
|
|
#endif
|
|
}
|
|
|
|
// Memoize the node unless it returns a flag.
|
|
SDNode *N;
|
|
if (VTList.VTs[VTList.NumVTs-1] != MVT::Flag) {
|
|
FoldingSetNodeID ID;
|
|
AddNodeIDNode(ID, Opcode, VTList, Ops, NumOps);
|
|
void *IP = 0;
|
|
if (SDNode *E = CSEMap.FindNodeOrInsertPos(ID, IP))
|
|
return SDOperand(E, 0);
|
|
if (NumOps == 1)
|
|
N = new UnarySDNode(Opcode, VTList, Ops[0]);
|
|
else if (NumOps == 2)
|
|
N = new BinarySDNode(Opcode, VTList, Ops[0], Ops[1]);
|
|
else if (NumOps == 3)
|
|
N = new TernarySDNode(Opcode, VTList, Ops[0], Ops[1], Ops[2]);
|
|
else
|
|
N = new SDNode(Opcode, VTList, Ops, NumOps);
|
|
CSEMap.InsertNode(N, IP);
|
|
} else {
|
|
if (NumOps == 1)
|
|
N = new UnarySDNode(Opcode, VTList, Ops[0]);
|
|
else if (NumOps == 2)
|
|
N = new BinarySDNode(Opcode, VTList, Ops[0], Ops[1]);
|
|
else if (NumOps == 3)
|
|
N = new TernarySDNode(Opcode, VTList, Ops[0], Ops[1], Ops[2]);
|
|
else
|
|
N = new SDNode(Opcode, VTList, Ops, NumOps);
|
|
}
|
|
AllNodes.push_back(N);
|
|
return SDOperand(N, 0);
|
|
}
|
|
|
|
SDOperand SelectionDAG::getNode(unsigned Opcode, SDVTList VTList) {
|
|
return getNode(Opcode, VTList, (SDOperand*)0, 0);
|
|
}
|
|
|
|
SDOperand SelectionDAG::getNode(unsigned Opcode, SDVTList VTList,
|
|
SDOperand N1) {
|
|
SDOperand Ops[] = { N1 };
|
|
return getNode(Opcode, VTList, Ops, 1);
|
|
}
|
|
|
|
SDOperand SelectionDAG::getNode(unsigned Opcode, SDVTList VTList,
|
|
SDOperand N1, SDOperand N2) {
|
|
SDOperand Ops[] = { N1, N2 };
|
|
return getNode(Opcode, VTList, Ops, 2);
|
|
}
|
|
|
|
SDOperand SelectionDAG::getNode(unsigned Opcode, SDVTList VTList,
|
|
SDOperand N1, SDOperand N2, SDOperand N3) {
|
|
SDOperand Ops[] = { N1, N2, N3 };
|
|
return getNode(Opcode, VTList, Ops, 3);
|
|
}
|
|
|
|
SDOperand SelectionDAG::getNode(unsigned Opcode, SDVTList VTList,
|
|
SDOperand N1, SDOperand N2, SDOperand N3,
|
|
SDOperand N4) {
|
|
SDOperand Ops[] = { N1, N2, N3, N4 };
|
|
return getNode(Opcode, VTList, Ops, 4);
|
|
}
|
|
|
|
SDOperand SelectionDAG::getNode(unsigned Opcode, SDVTList VTList,
|
|
SDOperand N1, SDOperand N2, SDOperand N3,
|
|
SDOperand N4, SDOperand N5) {
|
|
SDOperand Ops[] = { N1, N2, N3, N4, N5 };
|
|
return getNode(Opcode, VTList, Ops, 5);
|
|
}
|
|
|
|
SDVTList SelectionDAG::getVTList(MVT VT) {
|
|
return makeVTList(SDNode::getValueTypeList(VT), 1);
|
|
}
|
|
|
|
SDVTList SelectionDAG::getVTList(MVT VT1, MVT VT2) {
|
|
for (std::list<std::vector<MVT> >::iterator I = VTList.begin(),
|
|
E = VTList.end(); I != E; ++I) {
|
|
if (I->size() == 2 && (*I)[0] == VT1 && (*I)[1] == VT2)
|
|
return makeVTList(&(*I)[0], 2);
|
|
}
|
|
std::vector<MVT> V;
|
|
V.push_back(VT1);
|
|
V.push_back(VT2);
|
|
VTList.push_front(V);
|
|
return makeVTList(&(*VTList.begin())[0], 2);
|
|
}
|
|
SDVTList SelectionDAG::getVTList(MVT VT1, MVT VT2,
|
|
MVT VT3) {
|
|
for (std::list<std::vector<MVT> >::iterator I = VTList.begin(),
|
|
E = VTList.end(); I != E; ++I) {
|
|
if (I->size() == 3 && (*I)[0] == VT1 && (*I)[1] == VT2 &&
|
|
(*I)[2] == VT3)
|
|
return makeVTList(&(*I)[0], 3);
|
|
}
|
|
std::vector<MVT> V;
|
|
V.push_back(VT1);
|
|
V.push_back(VT2);
|
|
V.push_back(VT3);
|
|
VTList.push_front(V);
|
|
return makeVTList(&(*VTList.begin())[0], 3);
|
|
}
|
|
|
|
SDVTList SelectionDAG::getVTList(const MVT *VTs, unsigned NumVTs) {
|
|
switch (NumVTs) {
|
|
case 0: assert(0 && "Cannot have nodes without results!");
|
|
case 1: return getVTList(VTs[0]);
|
|
case 2: return getVTList(VTs[0], VTs[1]);
|
|
case 3: return getVTList(VTs[0], VTs[1], VTs[2]);
|
|
default: break;
|
|
}
|
|
|
|
for (std::list<std::vector<MVT> >::iterator I = VTList.begin(),
|
|
E = VTList.end(); I != E; ++I) {
|
|
if (I->size() != NumVTs || VTs[0] != (*I)[0] || VTs[1] != (*I)[1]) continue;
|
|
|
|
bool NoMatch = false;
|
|
for (unsigned i = 2; i != NumVTs; ++i)
|
|
if (VTs[i] != (*I)[i]) {
|
|
NoMatch = true;
|
|
break;
|
|
}
|
|
if (!NoMatch)
|
|
return makeVTList(&*I->begin(), NumVTs);
|
|
}
|
|
|
|
VTList.push_front(std::vector<MVT>(VTs, VTs+NumVTs));
|
|
return makeVTList(&*VTList.begin()->begin(), NumVTs);
|
|
}
|
|
|
|
|
|
/// UpdateNodeOperands - *Mutate* the specified node in-place to have the
|
|
/// specified operands. If the resultant node already exists in the DAG,
|
|
/// this does not modify the specified node, instead it returns the node that
|
|
/// already exists. If the resultant node does not exist in the DAG, the
|
|
/// input node is returned. As a degenerate case, if you specify the same
|
|
/// input operands as the node already has, the input node is returned.
|
|
SDOperand SelectionDAG::
|
|
UpdateNodeOperands(SDOperand InN, SDOperand Op) {
|
|
SDNode *N = InN.Val;
|
|
assert(N->getNumOperands() == 1 && "Update with wrong number of operands");
|
|
|
|
// Check to see if there is no change.
|
|
if (Op == N->getOperand(0)) return InN;
|
|
|
|
// See if the modified node already exists.
|
|
void *InsertPos = 0;
|
|
if (SDNode *Existing = FindModifiedNodeSlot(N, Op, InsertPos))
|
|
return SDOperand(Existing, InN.ResNo);
|
|
|
|
// Nope it doesn't. Remove the node from it's current place in the maps.
|
|
if (InsertPos)
|
|
RemoveNodeFromCSEMaps(N);
|
|
|
|
// Now we update the operands.
|
|
N->OperandList[0].getVal()->removeUser(0, N);
|
|
N->OperandList[0] = Op;
|
|
N->OperandList[0].setUser(N);
|
|
Op.Val->addUser(0, N);
|
|
|
|
// If this gets put into a CSE map, add it.
|
|
if (InsertPos) CSEMap.InsertNode(N, InsertPos);
|
|
return InN;
|
|
}
|
|
|
|
SDOperand SelectionDAG::
|
|
UpdateNodeOperands(SDOperand InN, SDOperand Op1, SDOperand Op2) {
|
|
SDNode *N = InN.Val;
|
|
assert(N->getNumOperands() == 2 && "Update with wrong number of operands");
|
|
|
|
// Check to see if there is no change.
|
|
if (Op1 == N->getOperand(0) && Op2 == N->getOperand(1))
|
|
return InN; // No operands changed, just return the input node.
|
|
|
|
// See if the modified node already exists.
|
|
void *InsertPos = 0;
|
|
if (SDNode *Existing = FindModifiedNodeSlot(N, Op1, Op2, InsertPos))
|
|
return SDOperand(Existing, InN.ResNo);
|
|
|
|
// Nope it doesn't. Remove the node from it's current place in the maps.
|
|
if (InsertPos)
|
|
RemoveNodeFromCSEMaps(N);
|
|
|
|
// Now we update the operands.
|
|
if (N->OperandList[0] != Op1) {
|
|
N->OperandList[0].getVal()->removeUser(0, N);
|
|
N->OperandList[0] = Op1;
|
|
N->OperandList[0].setUser(N);
|
|
Op1.Val->addUser(0, N);
|
|
}
|
|
if (N->OperandList[1] != Op2) {
|
|
N->OperandList[1].getVal()->removeUser(1, N);
|
|
N->OperandList[1] = Op2;
|
|
N->OperandList[1].setUser(N);
|
|
Op2.Val->addUser(1, N);
|
|
}
|
|
|
|
// If this gets put into a CSE map, add it.
|
|
if (InsertPos) CSEMap.InsertNode(N, InsertPos);
|
|
return InN;
|
|
}
|
|
|
|
SDOperand SelectionDAG::
|
|
UpdateNodeOperands(SDOperand N, SDOperand Op1, SDOperand Op2, SDOperand Op3) {
|
|
SDOperand Ops[] = { Op1, Op2, Op3 };
|
|
return UpdateNodeOperands(N, Ops, 3);
|
|
}
|
|
|
|
SDOperand SelectionDAG::
|
|
UpdateNodeOperands(SDOperand N, SDOperand Op1, SDOperand Op2,
|
|
SDOperand Op3, SDOperand Op4) {
|
|
SDOperand Ops[] = { Op1, Op2, Op3, Op4 };
|
|
return UpdateNodeOperands(N, Ops, 4);
|
|
}
|
|
|
|
SDOperand SelectionDAG::
|
|
UpdateNodeOperands(SDOperand N, SDOperand Op1, SDOperand Op2,
|
|
SDOperand Op3, SDOperand Op4, SDOperand Op5) {
|
|
SDOperand Ops[] = { Op1, Op2, Op3, Op4, Op5 };
|
|
return UpdateNodeOperands(N, Ops, 5);
|
|
}
|
|
|
|
SDOperand SelectionDAG::
|
|
UpdateNodeOperands(SDOperand InN, SDOperandPtr Ops, unsigned NumOps) {
|
|
SDNode *N = InN.Val;
|
|
assert(N->getNumOperands() == NumOps &&
|
|
"Update with wrong number of operands");
|
|
|
|
// Check to see if there is no change.
|
|
bool AnyChange = false;
|
|
for (unsigned i = 0; i != NumOps; ++i) {
|
|
if (Ops[i] != N->getOperand(i)) {
|
|
AnyChange = true;
|
|
break;
|
|
}
|
|
}
|
|
|
|
// No operands changed, just return the input node.
|
|
if (!AnyChange) return InN;
|
|
|
|
// See if the modified node already exists.
|
|
void *InsertPos = 0;
|
|
if (SDNode *Existing = FindModifiedNodeSlot(N, Ops, NumOps, InsertPos))
|
|
return SDOperand(Existing, InN.ResNo);
|
|
|
|
// Nope it doesn't. Remove the node from its current place in the maps.
|
|
if (InsertPos)
|
|
RemoveNodeFromCSEMaps(N);
|
|
|
|
// Now we update the operands.
|
|
for (unsigned i = 0; i != NumOps; ++i) {
|
|
if (N->OperandList[i] != Ops[i]) {
|
|
N->OperandList[i].getVal()->removeUser(i, N);
|
|
N->OperandList[i] = Ops[i];
|
|
N->OperandList[i].setUser(N);
|
|
Ops[i].Val->addUser(i, N);
|
|
}
|
|
}
|
|
|
|
// If this gets put into a CSE map, add it.
|
|
if (InsertPos) CSEMap.InsertNode(N, InsertPos);
|
|
return InN;
|
|
}
|
|
|
|
/// MorphNodeTo - This frees the operands of the current node, resets the
|
|
/// opcode, types, and operands to the specified value. This should only be
|
|
/// used by the SelectionDAG class.
|
|
void SDNode::MorphNodeTo(unsigned Opc, SDVTList L,
|
|
SDOperandPtr Ops, unsigned NumOps) {
|
|
NodeType = Opc;
|
|
ValueList = L.VTs;
|
|
NumValues = L.NumVTs;
|
|
|
|
// Clear the operands list, updating used nodes to remove this from their
|
|
// use list.
|
|
for (op_iterator I = op_begin(), E = op_end(); I != E; ++I)
|
|
I->getVal()->removeUser(std::distance(op_begin(), I), this);
|
|
|
|
// If NumOps is larger than the # of operands we currently have, reallocate
|
|
// the operand list.
|
|
if (NumOps > NumOperands) {
|
|
if (OperandsNeedDelete) {
|
|
delete [] OperandList;
|
|
}
|
|
OperandList = new SDUse[NumOps];
|
|
OperandsNeedDelete = true;
|
|
}
|
|
|
|
// Assign the new operands.
|
|
NumOperands = NumOps;
|
|
|
|
for (unsigned i = 0, e = NumOps; i != e; ++i) {
|
|
OperandList[i] = Ops[i];
|
|
OperandList[i].setUser(this);
|
|
SDNode *N = OperandList[i].getVal();
|
|
N->addUser(i, this);
|
|
++N->UsesSize;
|
|
}
|
|
}
|
|
|
|
/// SelectNodeTo - These are used for target selectors to *mutate* the
|
|
/// specified node to have the specified return type, Target opcode, and
|
|
/// operands. Note that target opcodes are stored as
|
|
/// ISD::BUILTIN_OP_END+TargetOpcode in the node opcode field.
|
|
///
|
|
/// Note that SelectNodeTo returns the resultant node. If there is already a
|
|
/// node of the specified opcode and operands, it returns that node instead of
|
|
/// the current one.
|
|
SDNode *SelectionDAG::SelectNodeTo(SDNode *N, unsigned TargetOpc,
|
|
MVT VT) {
|
|
SDVTList VTs = getVTList(VT);
|
|
FoldingSetNodeID ID;
|
|
AddNodeIDNode(ID, ISD::BUILTIN_OP_END+TargetOpc, VTs, (SDOperand*)0, 0);
|
|
void *IP = 0;
|
|
if (SDNode *ON = CSEMap.FindNodeOrInsertPos(ID, IP))
|
|
return ON;
|
|
|
|
RemoveNodeFromCSEMaps(N);
|
|
|
|
N->MorphNodeTo(ISD::BUILTIN_OP_END+TargetOpc, VTs, SDOperandPtr(), 0);
|
|
|
|
CSEMap.InsertNode(N, IP);
|
|
return N;
|
|
}
|
|
|
|
SDNode *SelectionDAG::SelectNodeTo(SDNode *N, unsigned TargetOpc,
|
|
MVT VT, SDOperand Op1) {
|
|
// If an identical node already exists, use it.
|
|
SDVTList VTs = getVTList(VT);
|
|
SDOperand Ops[] = { Op1 };
|
|
|
|
FoldingSetNodeID ID;
|
|
AddNodeIDNode(ID, ISD::BUILTIN_OP_END+TargetOpc, VTs, Ops, 1);
|
|
void *IP = 0;
|
|
if (SDNode *ON = CSEMap.FindNodeOrInsertPos(ID, IP))
|
|
return ON;
|
|
|
|
RemoveNodeFromCSEMaps(N);
|
|
N->MorphNodeTo(ISD::BUILTIN_OP_END+TargetOpc, VTs, Ops, 1);
|
|
CSEMap.InsertNode(N, IP);
|
|
return N;
|
|
}
|
|
|
|
SDNode *SelectionDAG::SelectNodeTo(SDNode *N, unsigned TargetOpc,
|
|
MVT VT, SDOperand Op1,
|
|
SDOperand Op2) {
|
|
// If an identical node already exists, use it.
|
|
SDVTList VTs = getVTList(VT);
|
|
SDOperand Ops[] = { Op1, Op2 };
|
|
|
|
FoldingSetNodeID ID;
|
|
AddNodeIDNode(ID, ISD::BUILTIN_OP_END+TargetOpc, VTs, Ops, 2);
|
|
void *IP = 0;
|
|
if (SDNode *ON = CSEMap.FindNodeOrInsertPos(ID, IP))
|
|
return ON;
|
|
|
|
RemoveNodeFromCSEMaps(N);
|
|
|
|
N->MorphNodeTo(ISD::BUILTIN_OP_END+TargetOpc, VTs, Ops, 2);
|
|
|
|
CSEMap.InsertNode(N, IP); // Memoize the new node.
|
|
return N;
|
|
}
|
|
|
|
SDNode *SelectionDAG::SelectNodeTo(SDNode *N, unsigned TargetOpc,
|
|
MVT VT, SDOperand Op1,
|
|
SDOperand Op2, SDOperand Op3) {
|
|
// If an identical node already exists, use it.
|
|
SDVTList VTs = getVTList(VT);
|
|
SDOperand Ops[] = { Op1, Op2, Op3 };
|
|
FoldingSetNodeID ID;
|
|
AddNodeIDNode(ID, ISD::BUILTIN_OP_END+TargetOpc, VTs, Ops, 3);
|
|
void *IP = 0;
|
|
if (SDNode *ON = CSEMap.FindNodeOrInsertPos(ID, IP))
|
|
return ON;
|
|
|
|
RemoveNodeFromCSEMaps(N);
|
|
|
|
N->MorphNodeTo(ISD::BUILTIN_OP_END+TargetOpc, VTs, Ops, 3);
|
|
|
|
CSEMap.InsertNode(N, IP); // Memoize the new node.
|
|
return N;
|
|
}
|
|
|
|
SDNode *SelectionDAG::SelectNodeTo(SDNode *N, unsigned TargetOpc,
|
|
MVT VT, SDOperandPtr Ops,
|
|
unsigned NumOps) {
|
|
// If an identical node already exists, use it.
|
|
SDVTList VTs = getVTList(VT);
|
|
FoldingSetNodeID ID;
|
|
AddNodeIDNode(ID, ISD::BUILTIN_OP_END+TargetOpc, VTs, Ops, NumOps);
|
|
void *IP = 0;
|
|
if (SDNode *ON = CSEMap.FindNodeOrInsertPos(ID, IP))
|
|
return ON;
|
|
|
|
RemoveNodeFromCSEMaps(N);
|
|
N->MorphNodeTo(ISD::BUILTIN_OP_END+TargetOpc, VTs, Ops, NumOps);
|
|
|
|
CSEMap.InsertNode(N, IP); // Memoize the new node.
|
|
return N;
|
|
}
|
|
|
|
SDNode *SelectionDAG::SelectNodeTo(SDNode *N, unsigned TargetOpc,
|
|
MVT VT1, MVT VT2,
|
|
SDOperand Op1, SDOperand Op2) {
|
|
SDVTList VTs = getVTList(VT1, VT2);
|
|
FoldingSetNodeID ID;
|
|
SDOperand Ops[] = { Op1, Op2 };
|
|
AddNodeIDNode(ID, ISD::BUILTIN_OP_END+TargetOpc, VTs, Ops, 2);
|
|
void *IP = 0;
|
|
if (SDNode *ON = CSEMap.FindNodeOrInsertPos(ID, IP))
|
|
return ON;
|
|
|
|
RemoveNodeFromCSEMaps(N);
|
|
N->MorphNodeTo(ISD::BUILTIN_OP_END+TargetOpc, VTs, Ops, 2);
|
|
CSEMap.InsertNode(N, IP); // Memoize the new node.
|
|
return N;
|
|
}
|
|
|
|
SDNode *SelectionDAG::SelectNodeTo(SDNode *N, unsigned TargetOpc,
|
|
MVT VT1, MVT VT2,
|
|
SDOperand Op1, SDOperand Op2,
|
|
SDOperand Op3) {
|
|
// If an identical node already exists, use it.
|
|
SDVTList VTs = getVTList(VT1, VT2);
|
|
SDOperand Ops[] = { Op1, Op2, Op3 };
|
|
FoldingSetNodeID ID;
|
|
AddNodeIDNode(ID, ISD::BUILTIN_OP_END+TargetOpc, VTs, Ops, 3);
|
|
void *IP = 0;
|
|
if (SDNode *ON = CSEMap.FindNodeOrInsertPos(ID, IP))
|
|
return ON;
|
|
|
|
RemoveNodeFromCSEMaps(N);
|
|
|
|
N->MorphNodeTo(ISD::BUILTIN_OP_END+TargetOpc, VTs, Ops, 3);
|
|
CSEMap.InsertNode(N, IP); // Memoize the new node.
|
|
return N;
|
|
}
|
|
|
|
|
|
/// getTargetNode - These are used for target selectors to create a new node
|
|
/// with specified return type(s), target opcode, and operands.
|
|
///
|
|
/// Note that getTargetNode returns the resultant node. If there is already a
|
|
/// node of the specified opcode and operands, it returns that node instead of
|
|
/// the current one.
|
|
SDNode *SelectionDAG::getTargetNode(unsigned Opcode, MVT VT) {
|
|
return getNode(ISD::BUILTIN_OP_END+Opcode, VT).Val;
|
|
}
|
|
SDNode *SelectionDAG::getTargetNode(unsigned Opcode, MVT VT, SDOperand Op1) {
|
|
return getNode(ISD::BUILTIN_OP_END+Opcode, VT, Op1).Val;
|
|
}
|
|
SDNode *SelectionDAG::getTargetNode(unsigned Opcode, MVT VT,
|
|
SDOperand Op1, SDOperand Op2) {
|
|
return getNode(ISD::BUILTIN_OP_END+Opcode, VT, Op1, Op2).Val;
|
|
}
|
|
SDNode *SelectionDAG::getTargetNode(unsigned Opcode, MVT VT,
|
|
SDOperand Op1, SDOperand Op2,
|
|
SDOperand Op3) {
|
|
return getNode(ISD::BUILTIN_OP_END+Opcode, VT, Op1, Op2, Op3).Val;
|
|
}
|
|
SDNode *SelectionDAG::getTargetNode(unsigned Opcode, MVT VT,
|
|
SDOperandPtr Ops, unsigned NumOps) {
|
|
return getNode(ISD::BUILTIN_OP_END+Opcode, VT, Ops, NumOps).Val;
|
|
}
|
|
SDNode *SelectionDAG::getTargetNode(unsigned Opcode, MVT VT1, MVT VT2) {
|
|
const MVT *VTs = getNodeValueTypes(VT1, VT2);
|
|
SDOperand Op;
|
|
return getNode(ISD::BUILTIN_OP_END+Opcode, VTs, 2, &Op, 0).Val;
|
|
}
|
|
SDNode *SelectionDAG::getTargetNode(unsigned Opcode, MVT VT1,
|
|
MVT VT2, SDOperand Op1) {
|
|
const MVT *VTs = getNodeValueTypes(VT1, VT2);
|
|
return getNode(ISD::BUILTIN_OP_END+Opcode, VTs, 2, &Op1, 1).Val;
|
|
}
|
|
SDNode *SelectionDAG::getTargetNode(unsigned Opcode, MVT VT1,
|
|
MVT VT2, SDOperand Op1,
|
|
SDOperand Op2) {
|
|
const MVT *VTs = getNodeValueTypes(VT1, VT2);
|
|
SDOperand Ops[] = { Op1, Op2 };
|
|
return getNode(ISD::BUILTIN_OP_END+Opcode, VTs, 2, Ops, 2).Val;
|
|
}
|
|
SDNode *SelectionDAG::getTargetNode(unsigned Opcode, MVT VT1,
|
|
MVT VT2, SDOperand Op1,
|
|
SDOperand Op2, SDOperand Op3) {
|
|
const MVT *VTs = getNodeValueTypes(VT1, VT2);
|
|
SDOperand Ops[] = { Op1, Op2, Op3 };
|
|
return getNode(ISD::BUILTIN_OP_END+Opcode, VTs, 2, Ops, 3).Val;
|
|
}
|
|
SDNode *SelectionDAG::getTargetNode(unsigned Opcode, MVT VT1, MVT VT2,
|
|
SDOperandPtr Ops, unsigned NumOps) {
|
|
const MVT *VTs = getNodeValueTypes(VT1, VT2);
|
|
return getNode(ISD::BUILTIN_OP_END+Opcode, VTs, 2, Ops, NumOps).Val;
|
|
}
|
|
SDNode *SelectionDAG::getTargetNode(unsigned Opcode, MVT VT1, MVT VT2, MVT VT3,
|
|
SDOperand Op1, SDOperand Op2) {
|
|
const MVT *VTs = getNodeValueTypes(VT1, VT2, VT3);
|
|
SDOperand Ops[] = { Op1, Op2 };
|
|
return getNode(ISD::BUILTIN_OP_END+Opcode, VTs, 3, Ops, 2).Val;
|
|
}
|
|
SDNode *SelectionDAG::getTargetNode(unsigned Opcode, MVT VT1, MVT VT2, MVT VT3,
|
|
SDOperand Op1, SDOperand Op2,
|
|
SDOperand Op3) {
|
|
const MVT *VTs = getNodeValueTypes(VT1, VT2, VT3);
|
|
SDOperand Ops[] = { Op1, Op2, Op3 };
|
|
return getNode(ISD::BUILTIN_OP_END+Opcode, VTs, 3, Ops, 3).Val;
|
|
}
|
|
SDNode *SelectionDAG::getTargetNode(unsigned Opcode, MVT VT1, MVT VT2, MVT VT3,
|
|
SDOperandPtr Ops, unsigned NumOps) {
|
|
const MVT *VTs = getNodeValueTypes(VT1, VT2, VT3);
|
|
return getNode(ISD::BUILTIN_OP_END+Opcode, VTs, 3, Ops, NumOps).Val;
|
|
}
|
|
SDNode *SelectionDAG::getTargetNode(unsigned Opcode, MVT VT1,
|
|
MVT VT2, MVT VT3, MVT VT4,
|
|
SDOperandPtr Ops, unsigned NumOps) {
|
|
std::vector<MVT> VTList;
|
|
VTList.push_back(VT1);
|
|
VTList.push_back(VT2);
|
|
VTList.push_back(VT3);
|
|
VTList.push_back(VT4);
|
|
const MVT *VTs = getNodeValueTypes(VTList);
|
|
return getNode(ISD::BUILTIN_OP_END+Opcode, VTs, 4, Ops, NumOps).Val;
|
|
}
|
|
SDNode *SelectionDAG::getTargetNode(unsigned Opcode,
|
|
std::vector<MVT> &ResultTys,
|
|
SDOperandPtr Ops, unsigned NumOps) {
|
|
const MVT *VTs = getNodeValueTypes(ResultTys);
|
|
return getNode(ISD::BUILTIN_OP_END+Opcode, VTs, ResultTys.size(),
|
|
Ops, NumOps).Val;
|
|
}
|
|
|
|
/// getNodeIfExists - Get the specified node if it's already available, or
|
|
/// else return NULL.
|
|
SDNode *SelectionDAG::getNodeIfExists(unsigned Opcode, SDVTList VTList,
|
|
SDOperandPtr Ops, unsigned NumOps) {
|
|
if (VTList.VTs[VTList.NumVTs-1] != MVT::Flag) {
|
|
FoldingSetNodeID ID;
|
|
AddNodeIDNode(ID, Opcode, VTList, Ops, NumOps);
|
|
void *IP = 0;
|
|
if (SDNode *E = CSEMap.FindNodeOrInsertPos(ID, IP))
|
|
return E;
|
|
}
|
|
return NULL;
|
|
}
|
|
|
|
|
|
/// ReplaceAllUsesWith - Modify anything using 'From' to use 'To' instead.
|
|
/// This can cause recursive merging of nodes in the DAG.
|
|
///
|
|
/// This version assumes From has a single result value.
|
|
///
|
|
void SelectionDAG::ReplaceAllUsesWith(SDOperand FromN, SDOperand To,
|
|
DAGUpdateListener *UpdateListener) {
|
|
SDNode *From = FromN.Val;
|
|
assert(From->getNumValues() == 1 && FromN.ResNo == 0 &&
|
|
"Cannot replace with this method!");
|
|
assert(From != To.Val && "Cannot replace uses of with self");
|
|
|
|
while (!From->use_empty()) {
|
|
SDNode::use_iterator UI = From->use_begin();
|
|
SDNode *U = UI->getUser();
|
|
|
|
// This node is about to morph, remove its old self from the CSE maps.
|
|
RemoveNodeFromCSEMaps(U);
|
|
int operandNum = 0;
|
|
for (SDNode::op_iterator I = U->op_begin(), E = U->op_end();
|
|
I != E; ++I, ++operandNum)
|
|
if (I->getVal() == From) {
|
|
From->removeUser(operandNum, U);
|
|
*I = To;
|
|
I->setUser(U);
|
|
To.Val->addUser(operandNum, U);
|
|
}
|
|
|
|
// Now that we have modified U, add it back to the CSE maps. If it already
|
|
// exists there, recursively merge the results together.
|
|
if (SDNode *Existing = AddNonLeafNodeToCSEMaps(U)) {
|
|
ReplaceAllUsesWith(U, Existing, UpdateListener);
|
|
// U is now dead. Inform the listener if it exists and delete it.
|
|
if (UpdateListener)
|
|
UpdateListener->NodeDeleted(U, Existing);
|
|
DeleteNodeNotInCSEMaps(U);
|
|
} else {
|
|
// If the node doesn't already exist, we updated it. Inform a listener if
|
|
// it exists.
|
|
if (UpdateListener)
|
|
UpdateListener->NodeUpdated(U);
|
|
}
|
|
}
|
|
}
|
|
|
|
/// ReplaceAllUsesWith - Modify anything using 'From' to use 'To' instead.
|
|
/// This can cause recursive merging of nodes in the DAG.
|
|
///
|
|
/// This version assumes From/To have matching types and numbers of result
|
|
/// values.
|
|
///
|
|
void SelectionDAG::ReplaceAllUsesWith(SDNode *From, SDNode *To,
|
|
DAGUpdateListener *UpdateListener) {
|
|
assert(From != To && "Cannot replace uses of with self");
|
|
assert(From->getNumValues() == To->getNumValues() &&
|
|
"Cannot use this version of ReplaceAllUsesWith!");
|
|
if (From->getNumValues() == 1) // If possible, use the faster version.
|
|
return ReplaceAllUsesWith(SDOperand(From, 0), SDOperand(To, 0),
|
|
UpdateListener);
|
|
|
|
while (!From->use_empty()) {
|
|
SDNode::use_iterator UI = From->use_begin();
|
|
SDNode *U = UI->getUser();
|
|
|
|
// This node is about to morph, remove its old self from the CSE maps.
|
|
RemoveNodeFromCSEMaps(U);
|
|
int operandNum = 0;
|
|
for (SDNode::op_iterator I = U->op_begin(), E = U->op_end();
|
|
I != E; ++I, ++operandNum)
|
|
if (I->getVal() == From) {
|
|
From->removeUser(operandNum, U);
|
|
I->getVal() = To;
|
|
To->addUser(operandNum, U);
|
|
}
|
|
|
|
// Now that we have modified U, add it back to the CSE maps. If it already
|
|
// exists there, recursively merge the results together.
|
|
if (SDNode *Existing = AddNonLeafNodeToCSEMaps(U)) {
|
|
ReplaceAllUsesWith(U, Existing, UpdateListener);
|
|
// U is now dead. Inform the listener if it exists and delete it.
|
|
if (UpdateListener)
|
|
UpdateListener->NodeDeleted(U, Existing);
|
|
DeleteNodeNotInCSEMaps(U);
|
|
} else {
|
|
// If the node doesn't already exist, we updated it. Inform a listener if
|
|
// it exists.
|
|
if (UpdateListener)
|
|
UpdateListener->NodeUpdated(U);
|
|
}
|
|
}
|
|
}
|
|
|
|
/// ReplaceAllUsesWith - Modify anything using 'From' to use 'To' instead.
|
|
/// This can cause recursive merging of nodes in the DAG.
|
|
///
|
|
/// This version can replace From with any result values. To must match the
|
|
/// number and types of values returned by From.
|
|
void SelectionDAG::ReplaceAllUsesWith(SDNode *From,
|
|
SDOperandPtr To,
|
|
DAGUpdateListener *UpdateListener) {
|
|
if (From->getNumValues() == 1) // Handle the simple case efficiently.
|
|
return ReplaceAllUsesWith(SDOperand(From, 0), To[0], UpdateListener);
|
|
|
|
while (!From->use_empty()) {
|
|
SDNode::use_iterator UI = From->use_begin();
|
|
SDNode *U = UI->getUser();
|
|
|
|
// This node is about to morph, remove its old self from the CSE maps.
|
|
RemoveNodeFromCSEMaps(U);
|
|
int operandNum = 0;
|
|
for (SDNode::op_iterator I = U->op_begin(), E = U->op_end();
|
|
I != E; ++I, ++operandNum)
|
|
if (I->getVal() == From) {
|
|
const SDOperand &ToOp = To[I->getSDOperand().ResNo];
|
|
From->removeUser(operandNum, U);
|
|
*I = ToOp;
|
|
I->setUser(U);
|
|
ToOp.Val->addUser(operandNum, U);
|
|
}
|
|
|
|
// Now that we have modified U, add it back to the CSE maps. If it already
|
|
// exists there, recursively merge the results together.
|
|
if (SDNode *Existing = AddNonLeafNodeToCSEMaps(U)) {
|
|
ReplaceAllUsesWith(U, Existing, UpdateListener);
|
|
// U is now dead. Inform the listener if it exists and delete it.
|
|
if (UpdateListener)
|
|
UpdateListener->NodeDeleted(U, Existing);
|
|
DeleteNodeNotInCSEMaps(U);
|
|
} else {
|
|
// If the node doesn't already exist, we updated it. Inform a listener if
|
|
// it exists.
|
|
if (UpdateListener)
|
|
UpdateListener->NodeUpdated(U);
|
|
}
|
|
}
|
|
}
|
|
|
|
namespace {
|
|
/// ChainedSetUpdaterListener - This class is a DAGUpdateListener that removes
|
|
/// any deleted nodes from the set passed into its constructor and recursively
|
|
/// notifies another update listener if specified.
|
|
class ChainedSetUpdaterListener :
|
|
public SelectionDAG::DAGUpdateListener {
|
|
SmallSetVector<SDNode*, 16> &Set;
|
|
SelectionDAG::DAGUpdateListener *Chain;
|
|
public:
|
|
ChainedSetUpdaterListener(SmallSetVector<SDNode*, 16> &set,
|
|
SelectionDAG::DAGUpdateListener *chain)
|
|
: Set(set), Chain(chain) {}
|
|
|
|
virtual void NodeDeleted(SDNode *N, SDNode *E) {
|
|
Set.remove(N);
|
|
if (Chain) Chain->NodeDeleted(N, E);
|
|
}
|
|
virtual void NodeUpdated(SDNode *N) {
|
|
if (Chain) Chain->NodeUpdated(N);
|
|
}
|
|
};
|
|
}
|
|
|
|
/// ReplaceAllUsesOfValueWith - Replace any uses of From with To, leaving
|
|
/// uses of other values produced by From.Val alone. The Deleted vector is
|
|
/// handled the same way as for ReplaceAllUsesWith.
|
|
void SelectionDAG::ReplaceAllUsesOfValueWith(SDOperand From, SDOperand To,
|
|
DAGUpdateListener *UpdateListener){
|
|
assert(From != To && "Cannot replace a value with itself");
|
|
|
|
// Handle the simple, trivial, case efficiently.
|
|
if (From.Val->getNumValues() == 1) {
|
|
ReplaceAllUsesWith(From, To, UpdateListener);
|
|
return;
|
|
}
|
|
|
|
if (From.use_empty()) return;
|
|
|
|
// Get all of the users of From.Val. We want these in a nice,
|
|
// deterministically ordered and uniqued set, so we use a SmallSetVector.
|
|
SmallSetVector<SDNode*, 16> Users;
|
|
for (SDNode::use_iterator UI = From.Val->use_begin(),
|
|
E = From.Val->use_end(); UI != E; ++UI) {
|
|
SDNode *User = UI->getUser();
|
|
if (!Users.count(User))
|
|
Users.insert(User);
|
|
}
|
|
|
|
// When one of the recursive merges deletes nodes from the graph, we need to
|
|
// make sure that UpdateListener is notified *and* that the node is removed
|
|
// from Users if present. CSUL does this.
|
|
ChainedSetUpdaterListener CSUL(Users, UpdateListener);
|
|
|
|
while (!Users.empty()) {
|
|
// We know that this user uses some value of From. If it is the right
|
|
// value, update it.
|
|
SDNode *User = Users.back();
|
|
Users.pop_back();
|
|
|
|
// Scan for an operand that matches From.
|
|
SDNode::op_iterator Op = User->op_begin(), E = User->op_end();
|
|
for (; Op != E; ++Op)
|
|
if (*Op == From) break;
|
|
|
|
// If there are no matches, the user must use some other result of From.
|
|
if (Op == E) continue;
|
|
|
|
// Okay, we know this user needs to be updated. Remove its old self
|
|
// from the CSE maps.
|
|
RemoveNodeFromCSEMaps(User);
|
|
|
|
// Update all operands that match "From" in case there are multiple uses.
|
|
for (; Op != E; ++Op) {
|
|
if (*Op == From) {
|
|
From.Val->removeUser(Op-User->op_begin(), User);
|
|
*Op = To;
|
|
Op->setUser(User);
|
|
To.Val->addUser(Op-User->op_begin(), User);
|
|
}
|
|
}
|
|
|
|
// Now that we have modified User, add it back to the CSE maps. If it
|
|
// already exists there, recursively merge the results together.
|
|
SDNode *Existing = AddNonLeafNodeToCSEMaps(User);
|
|
if (!Existing) {
|
|
if (UpdateListener) UpdateListener->NodeUpdated(User);
|
|
continue; // Continue on to next user.
|
|
}
|
|
|
|
// If there was already an existing matching node, use ReplaceAllUsesWith
|
|
// to replace the dead one with the existing one. This can cause
|
|
// recursive merging of other unrelated nodes down the line. The merging
|
|
// can cause deletion of nodes that used the old value. To handle this, we
|
|
// use CSUL to remove them from the Users set.
|
|
ReplaceAllUsesWith(User, Existing, &CSUL);
|
|
|
|
// User is now dead. Notify a listener if present.
|
|
if (UpdateListener) UpdateListener->NodeDeleted(User, Existing);
|
|
DeleteNodeNotInCSEMaps(User);
|
|
}
|
|
}
|
|
|
|
/// AssignNodeIds - Assign a unique node id for each node in the DAG based on
|
|
/// their allnodes order. It returns the maximum id.
|
|
unsigned SelectionDAG::AssignNodeIds() {
|
|
unsigned Id = 0;
|
|
for (allnodes_iterator I = allnodes_begin(), E = allnodes_end(); I != E; ++I){
|
|
SDNode *N = I;
|
|
N->setNodeId(Id++);
|
|
}
|
|
return Id;
|
|
}
|
|
|
|
/// AssignTopologicalOrder - Assign a unique node id for each node in the DAG
|
|
/// based on their topological order. It returns the maximum id and a vector
|
|
/// of the SDNodes* in assigned order by reference.
|
|
unsigned SelectionDAG::AssignTopologicalOrder(std::vector<SDNode*> &TopOrder) {
|
|
unsigned DAGSize = AllNodes.size();
|
|
std::vector<unsigned> InDegree(DAGSize);
|
|
std::vector<SDNode*> Sources;
|
|
|
|
// Use a two pass approach to avoid using a std::map which is slow.
|
|
unsigned Id = 0;
|
|
for (allnodes_iterator I = allnodes_begin(),E = allnodes_end(); I != E; ++I){
|
|
SDNode *N = I;
|
|
N->setNodeId(Id++);
|
|
unsigned Degree = N->use_size();
|
|
InDegree[N->getNodeId()] = Degree;
|
|
if (Degree == 0)
|
|
Sources.push_back(N);
|
|
}
|
|
|
|
TopOrder.clear();
|
|
while (!Sources.empty()) {
|
|
SDNode *N = Sources.back();
|
|
Sources.pop_back();
|
|
TopOrder.push_back(N);
|
|
for (SDNode::op_iterator I = N->op_begin(), E = N->op_end(); I != E; ++I) {
|
|
SDNode *P = I->getVal();
|
|
unsigned Degree = --InDegree[P->getNodeId()];
|
|
if (Degree == 0)
|
|
Sources.push_back(P);
|
|
}
|
|
}
|
|
|
|
// Second pass, assign the actual topological order as node ids.
|
|
Id = 0;
|
|
for (std::vector<SDNode*>::iterator TI = TopOrder.begin(),TE = TopOrder.end();
|
|
TI != TE; ++TI)
|
|
(*TI)->setNodeId(Id++);
|
|
|
|
return Id;
|
|
}
|
|
|
|
|
|
|
|
//===----------------------------------------------------------------------===//
|
|
// SDNode Class
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
// Out-of-line virtual method to give class a home.
|
|
void SDNode::ANCHOR() {}
|
|
void UnarySDNode::ANCHOR() {}
|
|
void BinarySDNode::ANCHOR() {}
|
|
void TernarySDNode::ANCHOR() {}
|
|
void HandleSDNode::ANCHOR() {}
|
|
void StringSDNode::ANCHOR() {}
|
|
void ConstantSDNode::ANCHOR() {}
|
|
void ConstantFPSDNode::ANCHOR() {}
|
|
void GlobalAddressSDNode::ANCHOR() {}
|
|
void FrameIndexSDNode::ANCHOR() {}
|
|
void JumpTableSDNode::ANCHOR() {}
|
|
void ConstantPoolSDNode::ANCHOR() {}
|
|
void BasicBlockSDNode::ANCHOR() {}
|
|
void SrcValueSDNode::ANCHOR() {}
|
|
void MemOperandSDNode::ANCHOR() {}
|
|
void RegisterSDNode::ANCHOR() {}
|
|
void ExternalSymbolSDNode::ANCHOR() {}
|
|
void CondCodeSDNode::ANCHOR() {}
|
|
void ARG_FLAGSSDNode::ANCHOR() {}
|
|
void VTSDNode::ANCHOR() {}
|
|
void MemSDNode::ANCHOR() {}
|
|
void LoadSDNode::ANCHOR() {}
|
|
void StoreSDNode::ANCHOR() {}
|
|
void AtomicSDNode::ANCHOR() {}
|
|
|
|
HandleSDNode::~HandleSDNode() {
|
|
SDVTList VTs = { 0, 0 };
|
|
MorphNodeTo(ISD::HANDLENODE, VTs, SDOperandPtr(), 0); // Drops operand uses.
|
|
}
|
|
|
|
GlobalAddressSDNode::GlobalAddressSDNode(bool isTarget, const GlobalValue *GA,
|
|
MVT VT, int o)
|
|
: SDNode(isa<GlobalVariable>(GA) &&
|
|
cast<GlobalVariable>(GA)->isThreadLocal() ?
|
|
// Thread Local
|
|
(isTarget ? ISD::TargetGlobalTLSAddress : ISD::GlobalTLSAddress) :
|
|
// Non Thread Local
|
|
(isTarget ? ISD::TargetGlobalAddress : ISD::GlobalAddress),
|
|
getSDVTList(VT)), Offset(o) {
|
|
TheGlobal = const_cast<GlobalValue*>(GA);
|
|
}
|
|
|
|
/// getMemOperand - Return a MachineMemOperand object describing the memory
|
|
/// reference performed by this atomic.
|
|
MachineMemOperand AtomicSDNode::getMemOperand() const {
|
|
int Size = (getValueType(0).getSizeInBits() + 7) >> 3;
|
|
int Flags = MachineMemOperand::MOLoad | MachineMemOperand::MOStore;
|
|
if (isVolatile()) Flags |= MachineMemOperand::MOVolatile;
|
|
|
|
// Check if the atomic references a frame index
|
|
const FrameIndexSDNode *FI =
|
|
dyn_cast<const FrameIndexSDNode>(getBasePtr().Val);
|
|
if (!getSrcValue() && FI)
|
|
return MachineMemOperand(PseudoSourceValue::getFixedStack(), Flags,
|
|
FI->getIndex(), Size, getAlignment());
|
|
else
|
|
return MachineMemOperand(getSrcValue(), Flags, getSrcValueOffset(),
|
|
Size, getAlignment());
|
|
}
|
|
|
|
/// getMemOperand - Return a MachineMemOperand object describing the memory
|
|
/// reference performed by this load or store.
|
|
MachineMemOperand LSBaseSDNode::getMemOperand() const {
|
|
int Size = (getMemoryVT().getSizeInBits() + 7) >> 3;
|
|
int Flags =
|
|
getOpcode() == ISD::LOAD ? MachineMemOperand::MOLoad :
|
|
MachineMemOperand::MOStore;
|
|
if (isVolatile()) Flags |= MachineMemOperand::MOVolatile;
|
|
|
|
// Check if the load references a frame index, and does not have
|
|
// an SV attached.
|
|
const FrameIndexSDNode *FI =
|
|
dyn_cast<const FrameIndexSDNode>(getBasePtr().Val);
|
|
if (!getSrcValue() && FI)
|
|
return MachineMemOperand(PseudoSourceValue::getFixedStack(), Flags,
|
|
FI->getIndex(), Size, getAlignment());
|
|
else
|
|
return MachineMemOperand(getSrcValue(), Flags,
|
|
getSrcValueOffset(), Size, getAlignment());
|
|
}
|
|
|
|
/// Profile - Gather unique data for the node.
|
|
///
|
|
void SDNode::Profile(FoldingSetNodeID &ID) {
|
|
AddNodeIDNode(ID, this);
|
|
}
|
|
|
|
/// getValueTypeList - Return a pointer to the specified value type.
|
|
///
|
|
const MVT *SDNode::getValueTypeList(MVT VT) {
|
|
if (VT.isExtended()) {
|
|
static std::set<MVT, MVT::compareRawBits> EVTs;
|
|
return &(*EVTs.insert(VT).first);
|
|
} else {
|
|
static MVT VTs[MVT::LAST_VALUETYPE];
|
|
VTs[VT.getSimpleVT()] = VT;
|
|
return &VTs[VT.getSimpleVT()];
|
|
}
|
|
}
|
|
|
|
/// hasNUsesOfValue - Return true if there are exactly NUSES uses of the
|
|
/// indicated value. This method ignores uses of other values defined by this
|
|
/// operation.
|
|
bool SDNode::hasNUsesOfValue(unsigned NUses, unsigned Value) const {
|
|
assert(Value < getNumValues() && "Bad value!");
|
|
|
|
// If there is only one value, this is easy.
|
|
if (getNumValues() == 1)
|
|
return use_size() == NUses;
|
|
if (use_size() < NUses) return false;
|
|
|
|
SDOperand TheValue(const_cast<SDNode *>(this), Value);
|
|
|
|
SmallPtrSet<SDNode*, 32> UsersHandled;
|
|
|
|
// TODO: Only iterate over uses of a given value of the node
|
|
for (SDNode::use_iterator UI = use_begin(), E = use_end(); UI != E; ++UI) {
|
|
if (*UI == TheValue) {
|
|
if (NUses == 0)
|
|
return false;
|
|
--NUses;
|
|
}
|
|
}
|
|
|
|
// Found exactly the right number of uses?
|
|
return NUses == 0;
|
|
}
|
|
|
|
|
|
/// hasAnyUseOfValue - Return true if there are any use of the indicated
|
|
/// value. This method ignores uses of other values defined by this operation.
|
|
bool SDNode::hasAnyUseOfValue(unsigned Value) const {
|
|
assert(Value < getNumValues() && "Bad value!");
|
|
|
|
if (use_empty()) return false;
|
|
|
|
SDOperand TheValue(const_cast<SDNode *>(this), Value);
|
|
|
|
SmallPtrSet<SDNode*, 32> UsersHandled;
|
|
|
|
for (SDNode::use_iterator UI = use_begin(), E = use_end(); UI != E; ++UI) {
|
|
SDNode *User = UI->getUser();
|
|
if (User->getNumOperands() == 1 ||
|
|
UsersHandled.insert(User)) // First time we've seen this?
|
|
for (unsigned i = 0, e = User->getNumOperands(); i != e; ++i)
|
|
if (User->getOperand(i) == TheValue) {
|
|
return true;
|
|
}
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
|
|
/// isOnlyUseOf - Return true if this node is the only use of N.
|
|
///
|
|
bool SDNode::isOnlyUseOf(SDNode *N) const {
|
|
bool Seen = false;
|
|
for (SDNode::use_iterator I = N->use_begin(), E = N->use_end(); I != E; ++I) {
|
|
SDNode *User = I->getUser();
|
|
if (User == this)
|
|
Seen = true;
|
|
else
|
|
return false;
|
|
}
|
|
|
|
return Seen;
|
|
}
|
|
|
|
/// isOperand - Return true if this node is an operand of N.
|
|
///
|
|
bool SDOperand::isOperandOf(SDNode *N) const {
|
|
for (unsigned i = 0, e = N->getNumOperands(); i != e; ++i)
|
|
if (*this == N->getOperand(i))
|
|
return true;
|
|
return false;
|
|
}
|
|
|
|
bool SDNode::isOperandOf(SDNode *N) const {
|
|
for (unsigned i = 0, e = N->NumOperands; i != e; ++i)
|
|
if (this == N->OperandList[i].getVal())
|
|
return true;
|
|
return false;
|
|
}
|
|
|
|
/// reachesChainWithoutSideEffects - Return true if this operand (which must
|
|
/// be a chain) reaches the specified operand without crossing any
|
|
/// side-effecting instructions. In practice, this looks through token
|
|
/// factors and non-volatile loads. In order to remain efficient, this only
|
|
/// looks a couple of nodes in, it does not do an exhaustive search.
|
|
bool SDOperand::reachesChainWithoutSideEffects(SDOperand Dest,
|
|
unsigned Depth) const {
|
|
if (*this == Dest) return true;
|
|
|
|
// Don't search too deeply, we just want to be able to see through
|
|
// TokenFactor's etc.
|
|
if (Depth == 0) return false;
|
|
|
|
// If this is a token factor, all inputs to the TF happen in parallel. If any
|
|
// of the operands of the TF reach dest, then we can do the xform.
|
|
if (getOpcode() == ISD::TokenFactor) {
|
|
for (unsigned i = 0, e = getNumOperands(); i != e; ++i)
|
|
if (getOperand(i).reachesChainWithoutSideEffects(Dest, Depth-1))
|
|
return true;
|
|
return false;
|
|
}
|
|
|
|
// Loads don't have side effects, look through them.
|
|
if (LoadSDNode *Ld = dyn_cast<LoadSDNode>(*this)) {
|
|
if (!Ld->isVolatile())
|
|
return Ld->getChain().reachesChainWithoutSideEffects(Dest, Depth-1);
|
|
}
|
|
return false;
|
|
}
|
|
|
|
|
|
static void findPredecessor(SDNode *N, const SDNode *P, bool &found,
|
|
SmallPtrSet<SDNode *, 32> &Visited) {
|
|
if (found || !Visited.insert(N))
|
|
return;
|
|
|
|
for (unsigned i = 0, e = N->getNumOperands(); !found && i != e; ++i) {
|
|
SDNode *Op = N->getOperand(i).Val;
|
|
if (Op == P) {
|
|
found = true;
|
|
return;
|
|
}
|
|
findPredecessor(Op, P, found, Visited);
|
|
}
|
|
}
|
|
|
|
/// isPredecessorOf - Return true if this node is a predecessor of N. This node
|
|
/// is either an operand of N or it can be reached by recursively traversing
|
|
/// up the operands.
|
|
/// NOTE: this is an expensive method. Use it carefully.
|
|
bool SDNode::isPredecessorOf(SDNode *N) const {
|
|
SmallPtrSet<SDNode *, 32> Visited;
|
|
bool found = false;
|
|
findPredecessor(N, this, found, Visited);
|
|
return found;
|
|
}
|
|
|
|
uint64_t SDNode::getConstantOperandVal(unsigned Num) const {
|
|
assert(Num < NumOperands && "Invalid child # of SDNode!");
|
|
return cast<ConstantSDNode>(OperandList[Num])->getValue();
|
|
}
|
|
|
|
std::string SDNode::getOperationName(const SelectionDAG *G) const {
|
|
switch (getOpcode()) {
|
|
default:
|
|
if (getOpcode() < ISD::BUILTIN_OP_END)
|
|
return "<<Unknown DAG Node>>";
|
|
else {
|
|
if (G) {
|
|
if (const TargetInstrInfo *TII = G->getTarget().getInstrInfo())
|
|
if (getOpcode()-ISD::BUILTIN_OP_END < TII->getNumOpcodes())
|
|
return TII->get(getOpcode()-ISD::BUILTIN_OP_END).getName();
|
|
|
|
TargetLowering &TLI = G->getTargetLoweringInfo();
|
|
const char *Name =
|
|
TLI.getTargetNodeName(getOpcode());
|
|
if (Name) return Name;
|
|
}
|
|
|
|
return "<<Unknown Target Node>>";
|
|
}
|
|
|
|
case ISD::PREFETCH: return "Prefetch";
|
|
case ISD::MEMBARRIER: return "MemBarrier";
|
|
case ISD::ATOMIC_CMP_SWAP: return "AtomicCmpSwap";
|
|
case ISD::ATOMIC_LOAD_ADD: return "AtomicLoadAdd";
|
|
case ISD::ATOMIC_LOAD_SUB: return "AtomicLoadSub";
|
|
case ISD::ATOMIC_LOAD_AND: return "AtomicLoadAnd";
|
|
case ISD::ATOMIC_LOAD_OR: return "AtomicLoadOr";
|
|
case ISD::ATOMIC_LOAD_XOR: return "AtomicLoadXor";
|
|
case ISD::ATOMIC_LOAD_NAND: return "AtomicLoadNand";
|
|
case ISD::ATOMIC_LOAD_MIN: return "AtomicLoadMin";
|
|
case ISD::ATOMIC_LOAD_MAX: return "AtomicLoadMax";
|
|
case ISD::ATOMIC_LOAD_UMIN: return "AtomicLoadUMin";
|
|
case ISD::ATOMIC_LOAD_UMAX: return "AtomicLoadUMax";
|
|
case ISD::ATOMIC_SWAP: return "AtomicSWAP";
|
|
case ISD::PCMARKER: return "PCMarker";
|
|
case ISD::READCYCLECOUNTER: return "ReadCycleCounter";
|
|
case ISD::SRCVALUE: return "SrcValue";
|
|
case ISD::MEMOPERAND: return "MemOperand";
|
|
case ISD::EntryToken: return "EntryToken";
|
|
case ISD::TokenFactor: return "TokenFactor";
|
|
case ISD::AssertSext: return "AssertSext";
|
|
case ISD::AssertZext: return "AssertZext";
|
|
|
|
case ISD::STRING: return "String";
|
|
case ISD::BasicBlock: return "BasicBlock";
|
|
case ISD::ARG_FLAGS: return "ArgFlags";
|
|
case ISD::VALUETYPE: return "ValueType";
|
|
case ISD::Register: return "Register";
|
|
|
|
case ISD::Constant: return "Constant";
|
|
case ISD::ConstantFP: return "ConstantFP";
|
|
case ISD::GlobalAddress: return "GlobalAddress";
|
|
case ISD::GlobalTLSAddress: return "GlobalTLSAddress";
|
|
case ISD::FrameIndex: return "FrameIndex";
|
|
case ISD::JumpTable: return "JumpTable";
|
|
case ISD::GLOBAL_OFFSET_TABLE: return "GLOBAL_OFFSET_TABLE";
|
|
case ISD::RETURNADDR: return "RETURNADDR";
|
|
case ISD::FRAMEADDR: return "FRAMEADDR";
|
|
case ISD::FRAME_TO_ARGS_OFFSET: return "FRAME_TO_ARGS_OFFSET";
|
|
case ISD::EXCEPTIONADDR: return "EXCEPTIONADDR";
|
|
case ISD::EHSELECTION: return "EHSELECTION";
|
|
case ISD::EH_RETURN: return "EH_RETURN";
|
|
case ISD::ConstantPool: return "ConstantPool";
|
|
case ISD::ExternalSymbol: return "ExternalSymbol";
|
|
case ISD::INTRINSIC_WO_CHAIN: {
|
|
unsigned IID = cast<ConstantSDNode>(getOperand(0))->getValue();
|
|
return Intrinsic::getName((Intrinsic::ID)IID);
|
|
}
|
|
case ISD::INTRINSIC_VOID:
|
|
case ISD::INTRINSIC_W_CHAIN: {
|
|
unsigned IID = cast<ConstantSDNode>(getOperand(1))->getValue();
|
|
return Intrinsic::getName((Intrinsic::ID)IID);
|
|
}
|
|
|
|
case ISD::BUILD_VECTOR: return "BUILD_VECTOR";
|
|
case ISD::TargetConstant: return "TargetConstant";
|
|
case ISD::TargetConstantFP:return "TargetConstantFP";
|
|
case ISD::TargetGlobalAddress: return "TargetGlobalAddress";
|
|
case ISD::TargetGlobalTLSAddress: return "TargetGlobalTLSAddress";
|
|
case ISD::TargetFrameIndex: return "TargetFrameIndex";
|
|
case ISD::TargetJumpTable: return "TargetJumpTable";
|
|
case ISD::TargetConstantPool: return "TargetConstantPool";
|
|
case ISD::TargetExternalSymbol: return "TargetExternalSymbol";
|
|
|
|
case ISD::CopyToReg: return "CopyToReg";
|
|
case ISD::CopyFromReg: return "CopyFromReg";
|
|
case ISD::UNDEF: return "undef";
|
|
case ISD::MERGE_VALUES: return "merge_values";
|
|
case ISD::INLINEASM: return "inlineasm";
|
|
case ISD::LABEL: return "label";
|
|
case ISD::DECLARE: return "declare";
|
|
case ISD::HANDLENODE: return "handlenode";
|
|
case ISD::FORMAL_ARGUMENTS: return "formal_arguments";
|
|
case ISD::CALL: return "call";
|
|
|
|
// Unary operators
|
|
case ISD::FABS: return "fabs";
|
|
case ISD::FNEG: return "fneg";
|
|
case ISD::FSQRT: return "fsqrt";
|
|
case ISD::FSIN: return "fsin";
|
|
case ISD::FCOS: return "fcos";
|
|
case ISD::FPOWI: return "fpowi";
|
|
case ISD::FPOW: return "fpow";
|
|
|
|
// Binary operators
|
|
case ISD::ADD: return "add";
|
|
case ISD::SUB: return "sub";
|
|
case ISD::MUL: return "mul";
|
|
case ISD::MULHU: return "mulhu";
|
|
case ISD::MULHS: return "mulhs";
|
|
case ISD::SDIV: return "sdiv";
|
|
case ISD::UDIV: return "udiv";
|
|
case ISD::SREM: return "srem";
|
|
case ISD::UREM: return "urem";
|
|
case ISD::SMUL_LOHI: return "smul_lohi";
|
|
case ISD::UMUL_LOHI: return "umul_lohi";
|
|
case ISD::SDIVREM: return "sdivrem";
|
|
case ISD::UDIVREM: return "divrem";
|
|
case ISD::AND: return "and";
|
|
case ISD::OR: return "or";
|
|
case ISD::XOR: return "xor";
|
|
case ISD::SHL: return "shl";
|
|
case ISD::SRA: return "sra";
|
|
case ISD::SRL: return "srl";
|
|
case ISD::ROTL: return "rotl";
|
|
case ISD::ROTR: return "rotr";
|
|
case ISD::FADD: return "fadd";
|
|
case ISD::FSUB: return "fsub";
|
|
case ISD::FMUL: return "fmul";
|
|
case ISD::FDIV: return "fdiv";
|
|
case ISD::FREM: return "frem";
|
|
case ISD::FCOPYSIGN: return "fcopysign";
|
|
case ISD::FGETSIGN: return "fgetsign";
|
|
|
|
case ISD::SETCC: return "setcc";
|
|
case ISD::VSETCC: return "vsetcc";
|
|
case ISD::SELECT: return "select";
|
|
case ISD::SELECT_CC: return "select_cc";
|
|
case ISD::INSERT_VECTOR_ELT: return "insert_vector_elt";
|
|
case ISD::EXTRACT_VECTOR_ELT: return "extract_vector_elt";
|
|
case ISD::CONCAT_VECTORS: return "concat_vectors";
|
|
case ISD::EXTRACT_SUBVECTOR: return "extract_subvector";
|
|
case ISD::SCALAR_TO_VECTOR: return "scalar_to_vector";
|
|
case ISD::VECTOR_SHUFFLE: return "vector_shuffle";
|
|
case ISD::CARRY_FALSE: return "carry_false";
|
|
case ISD::ADDC: return "addc";
|
|
case ISD::ADDE: return "adde";
|
|
case ISD::SUBC: return "subc";
|
|
case ISD::SUBE: return "sube";
|
|
case ISD::SHL_PARTS: return "shl_parts";
|
|
case ISD::SRA_PARTS: return "sra_parts";
|
|
case ISD::SRL_PARTS: return "srl_parts";
|
|
|
|
case ISD::EXTRACT_SUBREG: return "extract_subreg";
|
|
case ISD::INSERT_SUBREG: return "insert_subreg";
|
|
|
|
// Conversion operators.
|
|
case ISD::SIGN_EXTEND: return "sign_extend";
|
|
case ISD::ZERO_EXTEND: return "zero_extend";
|
|
case ISD::ANY_EXTEND: return "any_extend";
|
|
case ISD::SIGN_EXTEND_INREG: return "sign_extend_inreg";
|
|
case ISD::TRUNCATE: return "truncate";
|
|
case ISD::FP_ROUND: return "fp_round";
|
|
case ISD::FLT_ROUNDS_: return "flt_rounds";
|
|
case ISD::FP_ROUND_INREG: return "fp_round_inreg";
|
|
case ISD::FP_EXTEND: return "fp_extend";
|
|
|
|
case ISD::SINT_TO_FP: return "sint_to_fp";
|
|
case ISD::UINT_TO_FP: return "uint_to_fp";
|
|
case ISD::FP_TO_SINT: return "fp_to_sint";
|
|
case ISD::FP_TO_UINT: return "fp_to_uint";
|
|
case ISD::BIT_CONVERT: return "bit_convert";
|
|
|
|
// Control flow instructions
|
|
case ISD::BR: return "br";
|
|
case ISD::BRIND: return "brind";
|
|
case ISD::BR_JT: return "br_jt";
|
|
case ISD::BRCOND: return "brcond";
|
|
case ISD::BR_CC: return "br_cc";
|
|
case ISD::RET: return "ret";
|
|
case ISD::CALLSEQ_START: return "callseq_start";
|
|
case ISD::CALLSEQ_END: return "callseq_end";
|
|
|
|
// Other operators
|
|
case ISD::LOAD: return "load";
|
|
case ISD::STORE: return "store";
|
|
case ISD::VAARG: return "vaarg";
|
|
case ISD::VACOPY: return "vacopy";
|
|
case ISD::VAEND: return "vaend";
|
|
case ISD::VASTART: return "vastart";
|
|
case ISD::DYNAMIC_STACKALLOC: return "dynamic_stackalloc";
|
|
case ISD::EXTRACT_ELEMENT: return "extract_element";
|
|
case ISD::BUILD_PAIR: return "build_pair";
|
|
case ISD::STACKSAVE: return "stacksave";
|
|
case ISD::STACKRESTORE: return "stackrestore";
|
|
case ISD::TRAP: return "trap";
|
|
|
|
// Bit manipulation
|
|
case ISD::BSWAP: return "bswap";
|
|
case ISD::CTPOP: return "ctpop";
|
|
case ISD::CTTZ: return "cttz";
|
|
case ISD::CTLZ: return "ctlz";
|
|
|
|
// Debug info
|
|
case ISD::LOCATION: return "location";
|
|
case ISD::DEBUG_LOC: return "debug_loc";
|
|
|
|
// Trampolines
|
|
case ISD::TRAMPOLINE: return "trampoline";
|
|
|
|
case ISD::CONDCODE:
|
|
switch (cast<CondCodeSDNode>(this)->get()) {
|
|
default: assert(0 && "Unknown setcc condition!");
|
|
case ISD::SETOEQ: return "setoeq";
|
|
case ISD::SETOGT: return "setogt";
|
|
case ISD::SETOGE: return "setoge";
|
|
case ISD::SETOLT: return "setolt";
|
|
case ISD::SETOLE: return "setole";
|
|
case ISD::SETONE: return "setone";
|
|
|
|
case ISD::SETO: return "seto";
|
|
case ISD::SETUO: return "setuo";
|
|
case ISD::SETUEQ: return "setue";
|
|
case ISD::SETUGT: return "setugt";
|
|
case ISD::SETUGE: return "setuge";
|
|
case ISD::SETULT: return "setult";
|
|
case ISD::SETULE: return "setule";
|
|
case ISD::SETUNE: return "setune";
|
|
|
|
case ISD::SETEQ: return "seteq";
|
|
case ISD::SETGT: return "setgt";
|
|
case ISD::SETGE: return "setge";
|
|
case ISD::SETLT: return "setlt";
|
|
case ISD::SETLE: return "setle";
|
|
case ISD::SETNE: return "setne";
|
|
}
|
|
}
|
|
}
|
|
|
|
const char *SDNode::getIndexedModeName(ISD::MemIndexedMode AM) {
|
|
switch (AM) {
|
|
default:
|
|
return "";
|
|
case ISD::PRE_INC:
|
|
return "<pre-inc>";
|
|
case ISD::PRE_DEC:
|
|
return "<pre-dec>";
|
|
case ISD::POST_INC:
|
|
return "<post-inc>";
|
|
case ISD::POST_DEC:
|
|
return "<post-dec>";
|
|
}
|
|
}
|
|
|
|
std::string ISD::ArgFlagsTy::getArgFlagsString() {
|
|
std::string S = "< ";
|
|
|
|
if (isZExt())
|
|
S += "zext ";
|
|
if (isSExt())
|
|
S += "sext ";
|
|
if (isInReg())
|
|
S += "inreg ";
|
|
if (isSRet())
|
|
S += "sret ";
|
|
if (isByVal())
|
|
S += "byval ";
|
|
if (isNest())
|
|
S += "nest ";
|
|
if (getByValAlign())
|
|
S += "byval-align:" + utostr(getByValAlign()) + " ";
|
|
if (getOrigAlign())
|
|
S += "orig-align:" + utostr(getOrigAlign()) + " ";
|
|
if (getByValSize())
|
|
S += "byval-size:" + utostr(getByValSize()) + " ";
|
|
return S + ">";
|
|
}
|
|
|
|
void SDNode::dump() const { dump(0); }
|
|
void SDNode::dump(const SelectionDAG *G) const {
|
|
cerr << (void*)this << ": ";
|
|
|
|
for (unsigned i = 0, e = getNumValues(); i != e; ++i) {
|
|
if (i) cerr << ",";
|
|
if (getValueType(i) == MVT::Other)
|
|
cerr << "ch";
|
|
else
|
|
cerr << getValueType(i).getMVTString();
|
|
}
|
|
cerr << " = " << getOperationName(G);
|
|
|
|
cerr << " ";
|
|
for (unsigned i = 0, e = getNumOperands(); i != e; ++i) {
|
|
if (i) cerr << ", ";
|
|
cerr << (void*)getOperand(i).Val;
|
|
if (unsigned RN = getOperand(i).ResNo)
|
|
cerr << ":" << RN;
|
|
}
|
|
|
|
if (!isTargetOpcode() && getOpcode() == ISD::VECTOR_SHUFFLE) {
|
|
SDNode *Mask = getOperand(2).Val;
|
|
cerr << "<";
|
|
for (unsigned i = 0, e = Mask->getNumOperands(); i != e; ++i) {
|
|
if (i) cerr << ",";
|
|
if (Mask->getOperand(i).getOpcode() == ISD::UNDEF)
|
|
cerr << "u";
|
|
else
|
|
cerr << cast<ConstantSDNode>(Mask->getOperand(i))->getValue();
|
|
}
|
|
cerr << ">";
|
|
}
|
|
|
|
if (const ConstantSDNode *CSDN = dyn_cast<ConstantSDNode>(this)) {
|
|
cerr << "<" << CSDN->getValue() << ">";
|
|
} else if (const ConstantFPSDNode *CSDN = dyn_cast<ConstantFPSDNode>(this)) {
|
|
if (&CSDN->getValueAPF().getSemantics()==&APFloat::IEEEsingle)
|
|
cerr << "<" << CSDN->getValueAPF().convertToFloat() << ">";
|
|
else if (&CSDN->getValueAPF().getSemantics()==&APFloat::IEEEdouble)
|
|
cerr << "<" << CSDN->getValueAPF().convertToDouble() << ">";
|
|
else {
|
|
cerr << "<APFloat(";
|
|
CSDN->getValueAPF().convertToAPInt().dump();
|
|
cerr << ")>";
|
|
}
|
|
} else if (const GlobalAddressSDNode *GADN =
|
|
dyn_cast<GlobalAddressSDNode>(this)) {
|
|
int offset = GADN->getOffset();
|
|
cerr << "<";
|
|
WriteAsOperand(*cerr.stream(), GADN->getGlobal()) << ">";
|
|
if (offset > 0)
|
|
cerr << " + " << offset;
|
|
else
|
|
cerr << " " << offset;
|
|
} else if (const FrameIndexSDNode *FIDN = dyn_cast<FrameIndexSDNode>(this)) {
|
|
cerr << "<" << FIDN->getIndex() << ">";
|
|
} else if (const JumpTableSDNode *JTDN = dyn_cast<JumpTableSDNode>(this)) {
|
|
cerr << "<" << JTDN->getIndex() << ">";
|
|
} else if (const ConstantPoolSDNode *CP = dyn_cast<ConstantPoolSDNode>(this)){
|
|
int offset = CP->getOffset();
|
|
if (CP->isMachineConstantPoolEntry())
|
|
cerr << "<" << *CP->getMachineCPVal() << ">";
|
|
else
|
|
cerr << "<" << *CP->getConstVal() << ">";
|
|
if (offset > 0)
|
|
cerr << " + " << offset;
|
|
else
|
|
cerr << " " << offset;
|
|
} else if (const BasicBlockSDNode *BBDN = dyn_cast<BasicBlockSDNode>(this)) {
|
|
cerr << "<";
|
|
const Value *LBB = (const Value*)BBDN->getBasicBlock()->getBasicBlock();
|
|
if (LBB)
|
|
cerr << LBB->getName() << " ";
|
|
cerr << (const void*)BBDN->getBasicBlock() << ">";
|
|
} else if (const RegisterSDNode *R = dyn_cast<RegisterSDNode>(this)) {
|
|
if (G && R->getReg() &&
|
|
TargetRegisterInfo::isPhysicalRegister(R->getReg())) {
|
|
cerr << " " << G->getTarget().getRegisterInfo()->getName(R->getReg());
|
|
} else {
|
|
cerr << " #" << R->getReg();
|
|
}
|
|
} else if (const ExternalSymbolSDNode *ES =
|
|
dyn_cast<ExternalSymbolSDNode>(this)) {
|
|
cerr << "'" << ES->getSymbol() << "'";
|
|
} else if (const SrcValueSDNode *M = dyn_cast<SrcValueSDNode>(this)) {
|
|
if (M->getValue())
|
|
cerr << "<" << M->getValue() << ">";
|
|
else
|
|
cerr << "<null>";
|
|
} else if (const MemOperandSDNode *M = dyn_cast<MemOperandSDNode>(this)) {
|
|
if (M->MO.getValue())
|
|
cerr << "<" << M->MO.getValue() << ":" << M->MO.getOffset() << ">";
|
|
else
|
|
cerr << "<null:" << M->MO.getOffset() << ">";
|
|
} else if (const ARG_FLAGSSDNode *N = dyn_cast<ARG_FLAGSSDNode>(this)) {
|
|
cerr << N->getArgFlags().getArgFlagsString();
|
|
} else if (const VTSDNode *N = dyn_cast<VTSDNode>(this)) {
|
|
cerr << ":" << N->getVT().getMVTString();
|
|
}
|
|
else if (const LoadSDNode *LD = dyn_cast<LoadSDNode>(this)) {
|
|
const Value *SrcValue = LD->getSrcValue();
|
|
int SrcOffset = LD->getSrcValueOffset();
|
|
cerr << " <";
|
|
if (SrcValue)
|
|
cerr << SrcValue;
|
|
else
|
|
cerr << "null";
|
|
cerr << ":" << SrcOffset << ">";
|
|
|
|
bool doExt = true;
|
|
switch (LD->getExtensionType()) {
|
|
default: doExt = false; break;
|
|
case ISD::EXTLOAD:
|
|
cerr << " <anyext ";
|
|
break;
|
|
case ISD::SEXTLOAD:
|
|
cerr << " <sext ";
|
|
break;
|
|
case ISD::ZEXTLOAD:
|
|
cerr << " <zext ";
|
|
break;
|
|
}
|
|
if (doExt)
|
|
cerr << LD->getMemoryVT().getMVTString() << ">";
|
|
|
|
const char *AM = getIndexedModeName(LD->getAddressingMode());
|
|
if (*AM)
|
|
cerr << " " << AM;
|
|
if (LD->isVolatile())
|
|
cerr << " <volatile>";
|
|
cerr << " alignment=" << LD->getAlignment();
|
|
} else if (const StoreSDNode *ST = dyn_cast<StoreSDNode>(this)) {
|
|
const Value *SrcValue = ST->getSrcValue();
|
|
int SrcOffset = ST->getSrcValueOffset();
|
|
cerr << " <";
|
|
if (SrcValue)
|
|
cerr << SrcValue;
|
|
else
|
|
cerr << "null";
|
|
cerr << ":" << SrcOffset << ">";
|
|
|
|
if (ST->isTruncatingStore())
|
|
cerr << " <trunc "
|
|
<< ST->getMemoryVT().getMVTString() << ">";
|
|
|
|
const char *AM = getIndexedModeName(ST->getAddressingMode());
|
|
if (*AM)
|
|
cerr << " " << AM;
|
|
if (ST->isVolatile())
|
|
cerr << " <volatile>";
|
|
cerr << " alignment=" << ST->getAlignment();
|
|
} else if (const AtomicSDNode* AT = dyn_cast<AtomicSDNode>(this)) {
|
|
const Value *SrcValue = AT->getSrcValue();
|
|
int SrcOffset = AT->getSrcValueOffset();
|
|
cerr << " <";
|
|
if (SrcValue)
|
|
cerr << SrcValue;
|
|
else
|
|
cerr << "null";
|
|
cerr << ":" << SrcOffset << ">";
|
|
if (AT->isVolatile())
|
|
cerr << " <volatile>";
|
|
cerr << " alignment=" << AT->getAlignment();
|
|
}
|
|
}
|
|
|
|
static void DumpNodes(const SDNode *N, unsigned indent, const SelectionDAG *G) {
|
|
for (unsigned i = 0, e = N->getNumOperands(); i != e; ++i)
|
|
if (N->getOperand(i).Val->hasOneUse())
|
|
DumpNodes(N->getOperand(i).Val, indent+2, G);
|
|
else
|
|
cerr << "\n" << std::string(indent+2, ' ')
|
|
<< (void*)N->getOperand(i).Val << ": <multiple use>";
|
|
|
|
|
|
cerr << "\n" << std::string(indent, ' ');
|
|
N->dump(G);
|
|
}
|
|
|
|
void SelectionDAG::dump() const {
|
|
cerr << "SelectionDAG has " << AllNodes.size() << " nodes:";
|
|
std::vector<const SDNode*> Nodes;
|
|
for (allnodes_const_iterator I = allnodes_begin(), E = allnodes_end();
|
|
I != E; ++I)
|
|
Nodes.push_back(I);
|
|
|
|
std::sort(Nodes.begin(), Nodes.end());
|
|
|
|
for (unsigned i = 0, e = Nodes.size(); i != e; ++i) {
|
|
if (!Nodes[i]->hasOneUse() && Nodes[i] != getRoot().Val)
|
|
DumpNodes(Nodes[i], 2, this);
|
|
}
|
|
|
|
if (getRoot().Val) DumpNodes(getRoot().Val, 2, this);
|
|
|
|
cerr << "\n\n";
|
|
}
|
|
|
|
const Type *ConstantPoolSDNode::getType() const {
|
|
if (isMachineConstantPoolEntry())
|
|
return Val.MachineCPVal->getType();
|
|
return Val.ConstVal->getType();
|
|
}
|