mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2024-12-21 00:32:23 +00:00
7038daf342
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@24653 91177308-0d34-0410-b5e6-96231b3b80d8
2089 lines
74 KiB
C++
2089 lines
74 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 was developed by the LLVM research group and is distributed under
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// the University of Illinois Open Source 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/GlobalValue.h"
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#include "llvm/Assembly/Writer.h"
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#include "llvm/CodeGen/MachineBasicBlock.h"
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#include "llvm/Support/MathExtras.h"
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#include "llvm/Target/MRegisterInfo.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 <iostream>
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#include <set>
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#include <cmath>
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#include <algorithm>
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using namespace llvm;
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static bool isCommutativeBinOp(unsigned Opcode) {
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switch (Opcode) {
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case ISD::ADD:
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case ISD::MUL:
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case ISD::FADD:
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case ISD::FMUL:
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case ISD::AND:
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case ISD::OR:
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case ISD::XOR: return true;
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default: return false; // FIXME: Need commutative info for user ops!
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}
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}
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static bool isAssociativeBinOp(unsigned Opcode) {
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switch (Opcode) {
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case ISD::ADD:
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case ISD::MUL:
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case ISD::AND:
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case ISD::OR:
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case ISD::XOR: return true;
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default: return false; // FIXME: Need associative info for user ops!
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}
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}
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// isInvertibleForFree - Return true if there is no cost to emitting the logical
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// inverse of this node.
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static bool isInvertibleForFree(SDOperand N) {
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if (isa<ConstantSDNode>(N.Val)) return true;
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if (N.Val->getOpcode() == ISD::SETCC && N.Val->hasOneUse())
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return true;
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return false;
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}
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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(double V) const {
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return DoubleToBits(V) == DoubleToBits(Value);
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}
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//===----------------------------------------------------------------------===//
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// ISD Class
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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 N bit.
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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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return ISD::CondCode(Op1 & Op2);
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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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// SelectionDAG Class
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//===----------------------------------------------------------------------===//
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/// RemoveDeadNodes - This method deletes all unreachable nodes in the
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/// SelectionDAG, including nodes (like loads) that have uses of their token
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/// chain but no other uses and no side effect. If a node is passed in as an
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/// argument, it is used as the seed for node deletion.
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void SelectionDAG::RemoveDeadNodes(SDNode *N) {
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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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bool MadeChange = false;
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// If we have a hint to start from, use it.
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if (N && N->use_empty()) {
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DestroyDeadNode(N);
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MadeChange = true;
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}
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for (allnodes_iterator I = allnodes_begin(), E = allnodes_end(); I != E; ++I)
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if (I->use_empty() && I->getOpcode() != 65535) {
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// Node is dead, recursively delete newly dead uses.
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DestroyDeadNode(I);
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MadeChange = true;
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}
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// Walk the nodes list, removing the nodes we've marked as dead.
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if (MadeChange) {
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for (allnodes_iterator I = allnodes_begin(), E = allnodes_end(); I != E; ) {
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SDNode *N = I++;
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if (N->use_empty())
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AllNodes.erase(N);
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}
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}
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// If the root changed (e.g. it was a dead load, update the root).
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setRoot(Dummy.getValue());
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}
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/// DestroyDeadNode - We know that N is dead. Nuke it from the CSE maps for the
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/// graph. If it is the last user of any of its operands, recursively process
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/// them the same way.
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///
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void SelectionDAG::DestroyDeadNode(SDNode *N) {
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// Okay, we really are going to delete this node. First take this out of the
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// appropriate CSE map.
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RemoveNodeFromCSEMaps(N);
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// Next, brutally remove the operand list. This is safe to do, as there are
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// no cycles in the graph.
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for (SDNode::op_iterator I = N->op_begin(), E = N->op_end(); I != E; ++I) {
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SDNode *O = I->Val;
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O->removeUser(N);
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// Now that we removed this operand, see if there are no uses of it left.
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if (O->use_empty())
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DestroyDeadNode(O);
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}
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delete[] N->OperandList;
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N->OperandList = 0;
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N->NumOperands = 0;
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// Mark the node as dead.
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N->MorphNodeTo(65535);
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}
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void SelectionDAG::DeleteNode(SDNode *N) {
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assert(N->use_empty() && "Cannot delete a node that is not dead!");
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// First take this out of the appropriate CSE map.
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RemoveNodeFromCSEMaps(N);
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// Finally, remove uses due to operands of this node, remove from the
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// AllNodes list, and delete the node.
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DeleteNodeNotInCSEMaps(N);
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}
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void SelectionDAG::DeleteNodeNotInCSEMaps(SDNode *N) {
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// Remove it from the AllNodes list.
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AllNodes.remove(N);
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// Drop all of the operands and decrement used nodes use counts.
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for (SDNode::op_iterator I = N->op_begin(), E = N->op_end(); I != E; ++I)
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I->Val->removeUser(N);
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delete[] N->OperandList;
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N->OperandList = 0;
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N->NumOperands = 0;
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delete N;
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}
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/// RemoveNodeFromCSEMaps - Take the specified node out of the CSE map that
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/// correspond to it. This is useful when we're about to delete or repurpose
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/// the node. We don't want future request for structurally identical nodes
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/// to return N anymore.
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void SelectionDAG::RemoveNodeFromCSEMaps(SDNode *N) {
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bool Erased = false;
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switch (N->getOpcode()) {
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case ISD::HANDLENODE: return; // noop.
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case ISD::Constant:
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Erased = Constants.erase(std::make_pair(cast<ConstantSDNode>(N)->getValue(),
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N->getValueType(0)));
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break;
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case ISD::TargetConstant:
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Erased = TargetConstants.erase(std::make_pair(
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cast<ConstantSDNode>(N)->getValue(),
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N->getValueType(0)));
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break;
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case ISD::ConstantFP: {
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uint64_t V = DoubleToBits(cast<ConstantFPSDNode>(N)->getValue());
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Erased = ConstantFPs.erase(std::make_pair(V, N->getValueType(0)));
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break;
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}
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case ISD::STRING:
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Erased = StringNodes.erase(cast<StringSDNode>(N)->getValue());
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break;
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case ISD::CONDCODE:
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assert(CondCodeNodes[cast<CondCodeSDNode>(N)->get()] &&
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"Cond code doesn't exist!");
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Erased = CondCodeNodes[cast<CondCodeSDNode>(N)->get()] != 0;
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CondCodeNodes[cast<CondCodeSDNode>(N)->get()] = 0;
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break;
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case ISD::GlobalAddress: {
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GlobalAddressSDNode *GN = cast<GlobalAddressSDNode>(N);
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Erased = GlobalValues.erase(std::make_pair(GN->getGlobal(),
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GN->getOffset()));
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break;
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}
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case ISD::TargetGlobalAddress: {
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GlobalAddressSDNode *GN = cast<GlobalAddressSDNode>(N);
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Erased =TargetGlobalValues.erase(std::make_pair(GN->getGlobal(),
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GN->getOffset()));
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break;
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}
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case ISD::FrameIndex:
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Erased = FrameIndices.erase(cast<FrameIndexSDNode>(N)->getIndex());
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break;
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case ISD::TargetFrameIndex:
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Erased = TargetFrameIndices.erase(cast<FrameIndexSDNode>(N)->getIndex());
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break;
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case ISD::ConstantPool:
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Erased = ConstantPoolIndices.erase(cast<ConstantPoolSDNode>(N)->get());
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break;
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case ISD::TargetConstantPool:
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Erased =TargetConstantPoolIndices.erase(cast<ConstantPoolSDNode>(N)->get());
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break;
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case ISD::BasicBlock:
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Erased = BBNodes.erase(cast<BasicBlockSDNode>(N)->getBasicBlock());
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break;
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case ISD::ExternalSymbol:
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Erased = ExternalSymbols.erase(cast<ExternalSymbolSDNode>(N)->getSymbol());
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break;
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case ISD::TargetExternalSymbol:
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Erased = TargetExternalSymbols.erase(cast<ExternalSymbolSDNode>(N)->getSymbol());
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break;
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case ISD::VALUETYPE:
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Erased = ValueTypeNodes[cast<VTSDNode>(N)->getVT()] != 0;
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ValueTypeNodes[cast<VTSDNode>(N)->getVT()] = 0;
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break;
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case ISD::Register:
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Erased = RegNodes.erase(std::make_pair(cast<RegisterSDNode>(N)->getReg(),
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N->getValueType(0)));
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break;
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case ISD::SRCVALUE: {
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SrcValueSDNode *SVN = cast<SrcValueSDNode>(N);
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Erased =ValueNodes.erase(std::make_pair(SVN->getValue(), SVN->getOffset()));
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break;
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}
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case ISD::LOAD:
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Erased = Loads.erase(std::make_pair(N->getOperand(1),
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std::make_pair(N->getOperand(0),
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N->getValueType(0))));
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break;
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default:
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if (N->getNumValues() == 1) {
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if (N->getNumOperands() == 0) {
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Erased = NullaryOps.erase(std::make_pair(N->getOpcode(),
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N->getValueType(0)));
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} else if (N->getNumOperands() == 1) {
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Erased =
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UnaryOps.erase(std::make_pair(N->getOpcode(),
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std::make_pair(N->getOperand(0),
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N->getValueType(0))));
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} else if (N->getNumOperands() == 2) {
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Erased =
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BinaryOps.erase(std::make_pair(N->getOpcode(),
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std::make_pair(N->getOperand(0),
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N->getOperand(1))));
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} else {
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std::vector<SDOperand> Ops(N->op_begin(), N->op_end());
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Erased =
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OneResultNodes.erase(std::make_pair(N->getOpcode(),
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std::make_pair(N->getValueType(0),
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Ops)));
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}
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} else {
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// Remove the node from the ArbitraryNodes map.
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std::vector<MVT::ValueType> RV(N->value_begin(), N->value_end());
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std::vector<SDOperand> Ops(N->op_begin(), N->op_end());
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Erased =
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ArbitraryNodes.erase(std::make_pair(N->getOpcode(),
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std::make_pair(RV, Ops)));
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}
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break;
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}
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#ifndef NDEBUG
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// Verify that the node was actually in one of the CSE maps, unless it has a
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// flag result (which cannot be CSE'd) or is one of the special cases that are
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// not subject to CSE.
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if (!Erased && N->getValueType(N->getNumValues()-1) != MVT::Flag &&
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N->getOpcode() != ISD::CALL && N->getOpcode() != ISD::CALLSEQ_START &&
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N->getOpcode() != ISD::CALLSEQ_END && !N->isTargetOpcode()) {
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N->dump();
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assert(0 && "Node is not in map!");
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}
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#endif
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}
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/// AddNonLeafNodeToCSEMaps - Add the specified node back to the CSE maps. It
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/// has been taken out and modified in some way. If the specified node already
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/// exists in the CSE maps, do not modify the maps, but return the existing node
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/// instead. If it doesn't exist, add it and return null.
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///
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SDNode *SelectionDAG::AddNonLeafNodeToCSEMaps(SDNode *N) {
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assert(N->getNumOperands() && "This is a leaf node!");
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if (N->getOpcode() == ISD::CALLSEQ_START ||
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N->getOpcode() == ISD::CALLSEQ_END ||
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N->getOpcode() == ISD::HANDLENODE)
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return 0; // Never add these nodes.
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if (N->getNumValues() == 1) {
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if (N->getNumOperands() == 1) {
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SDNode *&U = UnaryOps[std::make_pair(N->getOpcode(),
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std::make_pair(N->getOperand(0),
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N->getValueType(0)))];
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if (U) return U;
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U = N;
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} else if (N->getNumOperands() == 2) {
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SDNode *&B = BinaryOps[std::make_pair(N->getOpcode(),
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std::make_pair(N->getOperand(0),
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N->getOperand(1)))];
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if (B) return B;
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B = N;
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} else {
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std::vector<SDOperand> Ops(N->op_begin(), N->op_end());
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SDNode *&ORN = OneResultNodes[std::make_pair(N->getOpcode(),
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std::make_pair(N->getValueType(0), Ops))];
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if (ORN) return ORN;
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ORN = N;
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}
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} else {
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if (N->getOpcode() == ISD::LOAD) {
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SDNode *&L = Loads[std::make_pair(N->getOperand(1),
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std::make_pair(N->getOperand(0),
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N->getValueType(0)))];
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if (L) return L;
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L = N;
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} else {
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// Remove the node from the ArbitraryNodes map.
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std::vector<MVT::ValueType> RV(N->value_begin(), N->value_end());
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std::vector<SDOperand> Ops(N->op_begin(), N->op_end());
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SDNode *&AN = ArbitraryNodes[std::make_pair(N->getOpcode(),
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std::make_pair(RV, Ops))];
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if (AN) return AN;
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AN = N;
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}
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}
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return 0;
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}
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SelectionDAG::~SelectionDAG() {
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while (!AllNodes.empty()) {
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SDNode *N = AllNodes.begin();
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delete [] N->OperandList;
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N->OperandList = 0;
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N->NumOperands = 0;
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AllNodes.pop_front();
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}
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}
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SDOperand SelectionDAG::getZeroExtendInReg(SDOperand Op, MVT::ValueType VT) {
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if (Op.getValueType() == VT) return Op;
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int64_t Imm = ~0ULL >> (64-MVT::getSizeInBits(VT));
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return getNode(ISD::AND, Op.getValueType(), Op,
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getConstant(Imm, Op.getValueType()));
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}
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SDOperand SelectionDAG::getConstant(uint64_t Val, MVT::ValueType VT) {
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assert(MVT::isInteger(VT) && "Cannot create FP integer constant!");
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// Mask out any bits that are not valid for this constant.
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if (VT != MVT::i64)
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Val &= ((uint64_t)1 << MVT::getSizeInBits(VT)) - 1;
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SDNode *&N = Constants[std::make_pair(Val, VT)];
|
|
if (N) return SDOperand(N, 0);
|
|
N = new ConstantSDNode(false, Val, VT);
|
|
AllNodes.push_back(N);
|
|
return SDOperand(N, 0);
|
|
}
|
|
|
|
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::getTargetConstant(uint64_t Val, MVT::ValueType VT) {
|
|
assert(MVT::isInteger(VT) && "Cannot create FP integer constant!");
|
|
// Mask out any bits that are not valid for this constant.
|
|
if (VT != MVT::i64)
|
|
Val &= ((uint64_t)1 << MVT::getSizeInBits(VT)) - 1;
|
|
|
|
SDNode *&N = TargetConstants[std::make_pair(Val, VT)];
|
|
if (N) return SDOperand(N, 0);
|
|
N = new ConstantSDNode(true, Val, VT);
|
|
AllNodes.push_back(N);
|
|
return SDOperand(N, 0);
|
|
}
|
|
|
|
SDOperand SelectionDAG::getConstantFP(double Val, MVT::ValueType VT) {
|
|
assert(MVT::isFloatingPoint(VT) && "Cannot create integer FP constant!");
|
|
if (VT == MVT::f32)
|
|
Val = (float)Val; // Mask out extra precision.
|
|
|
|
// 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.
|
|
SDNode *&N = ConstantFPs[std::make_pair(DoubleToBits(Val), VT)];
|
|
if (N) return SDOperand(N, 0);
|
|
N = new ConstantFPSDNode(Val, VT);
|
|
AllNodes.push_back(N);
|
|
return SDOperand(N, 0);
|
|
}
|
|
|
|
SDOperand SelectionDAG::getGlobalAddress(const GlobalValue *GV,
|
|
MVT::ValueType VT, int offset) {
|
|
SDNode *&N = GlobalValues[std::make_pair(GV, offset)];
|
|
if (N) return SDOperand(N, 0);
|
|
N = new GlobalAddressSDNode(false, GV, VT);
|
|
AllNodes.push_back(N);
|
|
return SDOperand(N, 0);
|
|
}
|
|
|
|
SDOperand SelectionDAG::getTargetGlobalAddress(const GlobalValue *GV,
|
|
MVT::ValueType VT, int offset) {
|
|
SDNode *&N = TargetGlobalValues[std::make_pair(GV, offset)];
|
|
if (N) return SDOperand(N, 0);
|
|
N = new GlobalAddressSDNode(true, GV, VT, offset);
|
|
AllNodes.push_back(N);
|
|
return SDOperand(N, 0);
|
|
}
|
|
|
|
SDOperand SelectionDAG::getFrameIndex(int FI, MVT::ValueType VT) {
|
|
SDNode *&N = FrameIndices[FI];
|
|
if (N) return SDOperand(N, 0);
|
|
N = new FrameIndexSDNode(FI, VT, false);
|
|
AllNodes.push_back(N);
|
|
return SDOperand(N, 0);
|
|
}
|
|
|
|
SDOperand SelectionDAG::getTargetFrameIndex(int FI, MVT::ValueType VT) {
|
|
SDNode *&N = TargetFrameIndices[FI];
|
|
if (N) return SDOperand(N, 0);
|
|
N = new FrameIndexSDNode(FI, VT, true);
|
|
AllNodes.push_back(N);
|
|
return SDOperand(N, 0);
|
|
}
|
|
|
|
SDOperand SelectionDAG::getConstantPool(Constant *C, MVT::ValueType VT) {
|
|
SDNode *&N = ConstantPoolIndices[C];
|
|
if (N) return SDOperand(N, 0);
|
|
N = new ConstantPoolSDNode(C, VT, false);
|
|
AllNodes.push_back(N);
|
|
return SDOperand(N, 0);
|
|
}
|
|
|
|
SDOperand SelectionDAG::getTargetConstantPool(Constant *C, MVT::ValueType VT) {
|
|
SDNode *&N = TargetConstantPoolIndices[C];
|
|
if (N) return SDOperand(N, 0);
|
|
N = new ConstantPoolSDNode(C, VT, true);
|
|
AllNodes.push_back(N);
|
|
return SDOperand(N, 0);
|
|
}
|
|
|
|
SDOperand SelectionDAG::getBasicBlock(MachineBasicBlock *MBB) {
|
|
SDNode *&N = BBNodes[MBB];
|
|
if (N) return SDOperand(N, 0);
|
|
N = new BasicBlockSDNode(MBB);
|
|
AllNodes.push_back(N);
|
|
return SDOperand(N, 0);
|
|
}
|
|
|
|
SDOperand SelectionDAG::getValueType(MVT::ValueType VT) {
|
|
if ((unsigned)VT >= ValueTypeNodes.size())
|
|
ValueTypeNodes.resize(VT+1);
|
|
if (ValueTypeNodes[VT] == 0) {
|
|
ValueTypeNodes[VT] = new VTSDNode(VT);
|
|
AllNodes.push_back(ValueTypeNodes[VT]);
|
|
}
|
|
|
|
return SDOperand(ValueTypeNodes[VT], 0);
|
|
}
|
|
|
|
SDOperand SelectionDAG::getExternalSymbol(const char *Sym, MVT::ValueType 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::ValueType 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::ValueType VT) {
|
|
RegisterSDNode *&Reg = RegNodes[std::make_pair(RegNo, VT)];
|
|
if (!Reg) {
|
|
Reg = new RegisterSDNode(RegNo, VT);
|
|
AllNodes.push_back(Reg);
|
|
}
|
|
return SDOperand(Reg, 0);
|
|
}
|
|
|
|
SDOperand SelectionDAG::SimplifySetCC(MVT::ValueType 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);
|
|
}
|
|
|
|
if (ConstantSDNode *N2C = dyn_cast<ConstantSDNode>(N2.Val)) {
|
|
uint64_t C2 = N2C->getValue();
|
|
if (ConstantSDNode *N1C = dyn_cast<ConstantSDNode>(N1.Val)) {
|
|
uint64_t C1 = N1C->getValue();
|
|
|
|
// Sign extend the operands if required
|
|
if (ISD::isSignedIntSetCC(Cond)) {
|
|
C1 = N1C->getSignExtended();
|
|
C2 = N2C->getSignExtended();
|
|
}
|
|
|
|
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 < C2, VT);
|
|
case ISD::SETUGT: return getConstant(C1 > C2, VT);
|
|
case ISD::SETULE: return getConstant(C1 <= C2, VT);
|
|
case ISD::SETUGE: return getConstant(C1 >= C2, VT);
|
|
case ISD::SETLT: return getConstant((int64_t)C1 < (int64_t)C2, VT);
|
|
case ISD::SETGT: return getConstant((int64_t)C1 > (int64_t)C2, VT);
|
|
case ISD::SETLE: return getConstant((int64_t)C1 <= (int64_t)C2, VT);
|
|
case ISD::SETGE: return getConstant((int64_t)C1 >= (int64_t)C2, VT);
|
|
}
|
|
} else {
|
|
// If the LHS is a ZERO_EXTEND, perform the comparison on the input.
|
|
if (N1.getOpcode() == ISD::ZERO_EXTEND) {
|
|
unsigned InSize = MVT::getSizeInBits(N1.getOperand(0).getValueType());
|
|
|
|
// If the comparison constant has bits in the upper part, the
|
|
// zero-extended value could never match.
|
|
if (C2 & (~0ULL << InSize)) {
|
|
unsigned VSize = MVT::getSizeInBits(N1.getValueType());
|
|
switch (Cond) {
|
|
case ISD::SETUGT:
|
|
case ISD::SETUGE:
|
|
case ISD::SETEQ: return getConstant(0, VT);
|
|
case ISD::SETULT:
|
|
case ISD::SETULE:
|
|
case ISD::SETNE: return getConstant(1, VT);
|
|
case ISD::SETGT:
|
|
case ISD::SETGE:
|
|
// True if the sign bit of C2 is set.
|
|
return getConstant((C2 & (1ULL << VSize)) != 0, VT);
|
|
case ISD::SETLT:
|
|
case ISD::SETLE:
|
|
// True if the sign bit of C2 isn't set.
|
|
return getConstant((C2 & (1ULL << VSize)) == 0, VT);
|
|
default:
|
|
break;
|
|
}
|
|
}
|
|
|
|
// Otherwise, we can perform the comparison with the low bits.
|
|
switch (Cond) {
|
|
case ISD::SETEQ:
|
|
case ISD::SETNE:
|
|
case ISD::SETUGT:
|
|
case ISD::SETUGE:
|
|
case ISD::SETULT:
|
|
case ISD::SETULE:
|
|
return getSetCC(VT, N1.getOperand(0),
|
|
getConstant(C2, N1.getOperand(0).getValueType()),
|
|
Cond);
|
|
default:
|
|
break; // todo, be more careful with signed comparisons
|
|
}
|
|
} else if (N1.getOpcode() == ISD::SIGN_EXTEND_INREG &&
|
|
(Cond == ISD::SETEQ || Cond == ISD::SETNE)) {
|
|
MVT::ValueType ExtSrcTy = cast<VTSDNode>(N1.getOperand(1))->getVT();
|
|
unsigned ExtSrcTyBits = MVT::getSizeInBits(ExtSrcTy);
|
|
MVT::ValueType ExtDstTy = N1.getValueType();
|
|
unsigned ExtDstTyBits = MVT::getSizeInBits(ExtDstTy);
|
|
|
|
// If the extended part has any inconsistent bits, it cannot ever
|
|
// compare equal. In other words, they have to be all ones or all
|
|
// zeros.
|
|
uint64_t ExtBits =
|
|
(~0ULL >> (64-ExtSrcTyBits)) & (~0ULL << (ExtDstTyBits-1));
|
|
if ((C2 & ExtBits) != 0 && (C2 & ExtBits) != ExtBits)
|
|
return getConstant(Cond == ISD::SETNE, VT);
|
|
|
|
// Otherwise, make this a use of a zext.
|
|
return getSetCC(VT, getZeroExtendInReg(N1.getOperand(0), ExtSrcTy),
|
|
getConstant(C2 & (~0ULL>>(64-ExtSrcTyBits)), ExtDstTy),
|
|
Cond);
|
|
}
|
|
|
|
uint64_t MinVal, MaxVal;
|
|
unsigned OperandBitSize = MVT::getSizeInBits(N2C->getValueType(0));
|
|
if (ISD::isSignedIntSetCC(Cond)) {
|
|
MinVal = 1ULL << (OperandBitSize-1);
|
|
if (OperandBitSize != 1) // Avoid X >> 64, which is undefined.
|
|
MaxVal = ~0ULL >> (65-OperandBitSize);
|
|
else
|
|
MaxVal = 0;
|
|
} else {
|
|
MinVal = 0;
|
|
MaxVal = ~0ULL >> (64-OperandBitSize);
|
|
}
|
|
|
|
// Canonicalize GE/LE comparisons to use GT/LT comparisons.
|
|
if (Cond == ISD::SETGE || Cond == ISD::SETUGE) {
|
|
if (C2 == MinVal) return getConstant(1, VT); // X >= MIN --> true
|
|
--C2; // X >= C1 --> X > (C1-1)
|
|
return getSetCC(VT, N1, getConstant(C2, N2.getValueType()),
|
|
(Cond == ISD::SETGE) ? ISD::SETGT : ISD::SETUGT);
|
|
}
|
|
|
|
if (Cond == ISD::SETLE || Cond == ISD::SETULE) {
|
|
if (C2 == MaxVal) return getConstant(1, VT); // X <= MAX --> true
|
|
++C2; // X <= C1 --> X < (C1+1)
|
|
return getSetCC(VT, N1, getConstant(C2, N2.getValueType()),
|
|
(Cond == ISD::SETLE) ? ISD::SETLT : ISD::SETULT);
|
|
}
|
|
|
|
if ((Cond == ISD::SETLT || Cond == ISD::SETULT) && C2 == MinVal)
|
|
return getConstant(0, VT); // X < MIN --> false
|
|
|
|
// Canonicalize setgt X, Min --> setne X, Min
|
|
if ((Cond == ISD::SETGT || Cond == ISD::SETUGT) && C2 == MinVal)
|
|
return getSetCC(VT, N1, N2, ISD::SETNE);
|
|
|
|
// If we have setult X, 1, turn it into seteq X, 0
|
|
if ((Cond == ISD::SETLT || Cond == ISD::SETULT) && C2 == MinVal+1)
|
|
return getSetCC(VT, N1, getConstant(MinVal, N1.getValueType()),
|
|
ISD::SETEQ);
|
|
// If we have setugt X, Max-1, turn it into seteq X, Max
|
|
else if ((Cond == ISD::SETGT || Cond == ISD::SETUGT) && C2 == MaxVal-1)
|
|
return getSetCC(VT, N1, getConstant(MaxVal, N1.getValueType()),
|
|
ISD::SETEQ);
|
|
|
|
// If we have "setcc X, C1", check to see if we can shrink the immediate
|
|
// by changing cc.
|
|
|
|
// SETUGT X, SINTMAX -> SETLT X, 0
|
|
if (Cond == ISD::SETUGT && OperandBitSize != 1 &&
|
|
C2 == (~0ULL >> (65-OperandBitSize)))
|
|
return getSetCC(VT, N1, getConstant(0, N2.getValueType()), ISD::SETLT);
|
|
|
|
// FIXME: Implement the rest of these.
|
|
|
|
|
|
// Fold bit comparisons when we can.
|
|
if ((Cond == ISD::SETEQ || Cond == ISD::SETNE) &&
|
|
VT == N1.getValueType() && N1.getOpcode() == ISD::AND)
|
|
if (ConstantSDNode *AndRHS =
|
|
dyn_cast<ConstantSDNode>(N1.getOperand(1))) {
|
|
if (Cond == ISD::SETNE && C2 == 0) {// (X & 8) != 0 --> (X & 8) >> 3
|
|
// Perform the xform if the AND RHS is a single bit.
|
|
if ((AndRHS->getValue() & (AndRHS->getValue()-1)) == 0) {
|
|
return getNode(ISD::SRL, VT, N1,
|
|
getConstant(Log2_64(AndRHS->getValue()),
|
|
TLI.getShiftAmountTy()));
|
|
}
|
|
} else if (Cond == ISD::SETEQ && C2 == AndRHS->getValue()) {
|
|
// (X & 8) == 8 --> (X & 8) >> 3
|
|
// Perform the xform if C2 is a single bit.
|
|
if ((C2 & (C2-1)) == 0) {
|
|
return getNode(ISD::SRL, VT, N1,
|
|
getConstant(Log2_64(C2),TLI.getShiftAmountTy()));
|
|
}
|
|
}
|
|
}
|
|
}
|
|
} else if (isa<ConstantSDNode>(N1.Val)) {
|
|
// Ensure that the constant occurs on the RHS.
|
|
return getSetCC(VT, N2, N1, ISD::getSetCCSwappedOperands(Cond));
|
|
}
|
|
|
|
if (ConstantFPSDNode *N1C = dyn_cast<ConstantFPSDNode>(N1.Val))
|
|
if (ConstantFPSDNode *N2C = dyn_cast<ConstantFPSDNode>(N2.Val)) {
|
|
double C1 = N1C->getValue(), C2 = N2C->getValue();
|
|
|
|
switch (Cond) {
|
|
default: break; // FIXME: Implement the rest of these!
|
|
case ISD::SETEQ: return getConstant(C1 == C2, VT);
|
|
case ISD::SETNE: return getConstant(C1 != C2, VT);
|
|
case ISD::SETLT: return getConstant(C1 < C2, VT);
|
|
case ISD::SETGT: return getConstant(C1 > C2, VT);
|
|
case ISD::SETLE: return getConstant(C1 <= C2, VT);
|
|
case ISD::SETGE: return getConstant(C1 >= C2, VT);
|
|
}
|
|
} else {
|
|
// Ensure that the constant occurs on the RHS.
|
|
return getSetCC(VT, N2, N1, ISD::getSetCCSwappedOperands(Cond));
|
|
}
|
|
|
|
// Could not fold it.
|
|
return SDOperand();
|
|
}
|
|
|
|
/// getNode - Gets or creates the specified node.
|
|
///
|
|
SDOperand SelectionDAG::getNode(unsigned Opcode, MVT::ValueType VT) {
|
|
SDNode *&N = NullaryOps[std::make_pair(Opcode, VT)];
|
|
if (!N) {
|
|
N = new SDNode(Opcode, VT);
|
|
AllNodes.push_back(N);
|
|
}
|
|
return SDOperand(N, 0);
|
|
}
|
|
|
|
SDOperand SelectionDAG::getNode(unsigned Opcode, MVT::ValueType VT,
|
|
SDOperand Operand) {
|
|
if (ConstantSDNode *C = dyn_cast<ConstantSDNode>(Operand.Val)) {
|
|
uint64_t Val = C->getValue();
|
|
switch (Opcode) {
|
|
default: break;
|
|
case ISD::SIGN_EXTEND: return getConstant(C->getSignExtended(), VT);
|
|
case ISD::ANY_EXTEND:
|
|
case ISD::ZERO_EXTEND: return getConstant(Val, VT);
|
|
case ISD::TRUNCATE: return getConstant(Val, VT);
|
|
case ISD::SINT_TO_FP: return getConstantFP(C->getSignExtended(), VT);
|
|
case ISD::UINT_TO_FP: return getConstantFP(C->getValue(), VT);
|
|
}
|
|
}
|
|
|
|
if (ConstantFPSDNode *C = dyn_cast<ConstantFPSDNode>(Operand.Val))
|
|
switch (Opcode) {
|
|
case ISD::FNEG:
|
|
return getConstantFP(-C->getValue(), VT);
|
|
case ISD::FP_ROUND:
|
|
case ISD::FP_EXTEND:
|
|
return getConstantFP(C->getValue(), VT);
|
|
case ISD::FP_TO_SINT:
|
|
return getConstant((int64_t)C->getValue(), VT);
|
|
case ISD::FP_TO_UINT:
|
|
return getConstant((uint64_t)C->getValue(), VT);
|
|
}
|
|
|
|
unsigned OpOpcode = Operand.Val->getOpcode();
|
|
switch (Opcode) {
|
|
case ISD::TokenFactor:
|
|
return Operand; // Factor of one node? No factor.
|
|
case ISD::SIGN_EXTEND:
|
|
if (Operand.getValueType() == VT) return Operand; // noop extension
|
|
if (OpOpcode == ISD::SIGN_EXTEND || OpOpcode == ISD::ZERO_EXTEND)
|
|
return getNode(OpOpcode, VT, Operand.Val->getOperand(0));
|
|
break;
|
|
case ISD::ZERO_EXTEND:
|
|
if (Operand.getValueType() == VT) return Operand; // noop extension
|
|
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:
|
|
if (Operand.getValueType() == VT) return Operand; // noop extension
|
|
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:
|
|
if (Operand.getValueType() == VT) return Operand; // noop truncate
|
|
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() < VT)
|
|
return getNode(OpOpcode, VT, Operand.Val->getOperand(0));
|
|
else if (Operand.Val->getOperand(0).getValueType() > VT)
|
|
return getNode(ISD::TRUNCATE, VT, Operand.Val->getOperand(0));
|
|
else
|
|
return Operand.Val->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;
|
|
if (VT != MVT::Flag) { // Don't CSE flag producing nodes
|
|
SDNode *&E = UnaryOps[std::make_pair(Opcode, std::make_pair(Operand, VT))];
|
|
if (E) return SDOperand(E, 0);
|
|
E = N = new SDNode(Opcode, Operand);
|
|
} else {
|
|
N = new SDNode(Opcode, Operand);
|
|
}
|
|
N->setValueTypes(VT);
|
|
AllNodes.push_back(N);
|
|
return SDOperand(N, 0);
|
|
}
|
|
|
|
|
|
|
|
SDOperand SelectionDAG::getNode(unsigned Opcode, MVT::ValueType VT,
|
|
SDOperand N1, SDOperand N2) {
|
|
#ifndef NDEBUG
|
|
switch (Opcode) {
|
|
case ISD::TokenFactor:
|
|
assert(VT == MVT::Other && N1.getValueType() == MVT::Other &&
|
|
N2.getValueType() == MVT::Other && "Invalid token factor!");
|
|
break;
|
|
case ISD::AND:
|
|
case ISD::OR:
|
|
case ISD::XOR:
|
|
case ISD::UDIV:
|
|
case ISD::UREM:
|
|
case ISD::MULHU:
|
|
case ISD::MULHS:
|
|
assert(MVT::isInteger(VT) && "This operator does not apply to FP types!");
|
|
// fall through
|
|
case ISD::ADD:
|
|
case ISD::SUB:
|
|
case ISD::MUL:
|
|
case ISD::SDIV:
|
|
case ISD::SREM:
|
|
assert(MVT::isInteger(N1.getValueType()) && "Should use F* for FP ops");
|
|
// fall through.
|
|
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::SHL:
|
|
case ISD::SRA:
|
|
case ISD::SRL:
|
|
assert(VT == N1.getValueType() &&
|
|
"Shift operators return type must be the same as their first arg");
|
|
assert(MVT::isInteger(VT) && MVT::isInteger(N2.getValueType()) &&
|
|
VT != MVT::i1 && "Shifts only work on integers");
|
|
break;
|
|
case ISD::FP_ROUND_INREG: {
|
|
MVT::ValueType EVT = cast<VTSDNode>(N2)->getVT();
|
|
assert(VT == N1.getValueType() && "Not an inreg round!");
|
|
assert(MVT::isFloatingPoint(VT) && MVT::isFloatingPoint(EVT) &&
|
|
"Cannot FP_ROUND_INREG integer types");
|
|
assert(EVT <= VT && "Not rounding down!");
|
|
break;
|
|
}
|
|
case ISD::AssertSext:
|
|
case ISD::AssertZext:
|
|
case ISD::SIGN_EXTEND_INREG: {
|
|
MVT::ValueType EVT = cast<VTSDNode>(N2)->getVT();
|
|
assert(VT == N1.getValueType() && "Not an inreg extend!");
|
|
assert(MVT::isInteger(VT) && MVT::isInteger(EVT) &&
|
|
"Cannot *_EXTEND_INREG FP types");
|
|
assert(EVT <= VT && "Not extending!");
|
|
}
|
|
|
|
default: break;
|
|
}
|
|
#endif
|
|
|
|
ConstantSDNode *N1C = dyn_cast<ConstantSDNode>(N1.Val);
|
|
ConstantSDNode *N2C = dyn_cast<ConstantSDNode>(N2.Val);
|
|
if (N1C) {
|
|
if (N2C) {
|
|
uint64_t C1 = N1C->getValue(), C2 = N2C->getValue();
|
|
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) return getConstant(C1 / C2, VT);
|
|
break;
|
|
case ISD::UREM :
|
|
if (C2) return getConstant(C1 % C2, VT);
|
|
break;
|
|
case ISD::SDIV :
|
|
if (C2) return getConstant(N1C->getSignExtended() /
|
|
N2C->getSignExtended(), VT);
|
|
break;
|
|
case ISD::SREM :
|
|
if (C2) return getConstant(N1C->getSignExtended() %
|
|
N2C->getSignExtended(), 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 >> C2, VT);
|
|
case ISD::SRA : return getConstant(N1C->getSignExtended() >>(int)C2, VT);
|
|
default: break;
|
|
}
|
|
} else { // Cannonicalize constant to RHS if commutative
|
|
if (isCommutativeBinOp(Opcode)) {
|
|
std::swap(N1C, N2C);
|
|
std::swap(N1, N2);
|
|
}
|
|
}
|
|
}
|
|
|
|
ConstantFPSDNode *N1CFP = dyn_cast<ConstantFPSDNode>(N1.Val);
|
|
ConstantFPSDNode *N2CFP = dyn_cast<ConstantFPSDNode>(N2.Val);
|
|
if (N1CFP) {
|
|
if (N2CFP) {
|
|
double C1 = N1CFP->getValue(), C2 = N2CFP->getValue();
|
|
switch (Opcode) {
|
|
case ISD::FADD: return getConstantFP(C1 + C2, VT);
|
|
case ISD::FSUB: return getConstantFP(C1 - C2, VT);
|
|
case ISD::FMUL: return getConstantFP(C1 * C2, VT);
|
|
case ISD::FDIV:
|
|
if (C2) return getConstantFP(C1 / C2, VT);
|
|
break;
|
|
case ISD::FREM :
|
|
if (C2) return getConstantFP(fmod(C1, C2), VT);
|
|
break;
|
|
default: break;
|
|
}
|
|
} else { // Cannonicalize constant to RHS if commutative
|
|
if (isCommutativeBinOp(Opcode)) {
|
|
std::swap(N1CFP, N2CFP);
|
|
std::swap(N1, N2);
|
|
}
|
|
}
|
|
}
|
|
|
|
// Finally, fold operations that do not require constants.
|
|
switch (Opcode) {
|
|
case ISD::FP_ROUND_INREG:
|
|
if (cast<VTSDNode>(N2)->getVT() == VT) return N1; // Not actually rounding.
|
|
break;
|
|
case ISD::SIGN_EXTEND_INREG: {
|
|
MVT::ValueType EVT = cast<VTSDNode>(N2)->getVT();
|
|
if (EVT == VT) return N1; // Not actually extending
|
|
break;
|
|
}
|
|
|
|
// 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::SHL:
|
|
case ISD::SRL:
|
|
case ISD::SRA:
|
|
if (N2.getOpcode() == ISD::SIGN_EXTEND_INREG &&
|
|
cast<VTSDNode>(N2.getOperand(1))->getVT() != MVT::i1)
|
|
return getNode(Opcode, VT, N1, N2.getOperand(0));
|
|
else if (N2.getOpcode() == ISD::AND)
|
|
if (ConstantSDNode *AndRHS = dyn_cast<ConstantSDNode>(N2.getOperand(1))) {
|
|
// If the and is only masking out bits that cannot effect the shift,
|
|
// eliminate the and.
|
|
unsigned NumBits = MVT::getSizeInBits(VT);
|
|
if ((AndRHS->getValue() & (NumBits-1)) == NumBits-1)
|
|
return getNode(Opcode, VT, N1, N2.getOperand(0));
|
|
}
|
|
break;
|
|
#endif
|
|
}
|
|
|
|
// Memoize this node if possible.
|
|
SDNode *N;
|
|
if (Opcode != ISD::CALLSEQ_START && Opcode != ISD::CALLSEQ_END &&
|
|
VT != MVT::Flag) {
|
|
SDNode *&BON = BinaryOps[std::make_pair(Opcode, std::make_pair(N1, N2))];
|
|
if (BON) return SDOperand(BON, 0);
|
|
|
|
BON = N = new SDNode(Opcode, N1, N2);
|
|
} else {
|
|
N = new SDNode(Opcode, N1, N2);
|
|
}
|
|
|
|
N->setValueTypes(VT);
|
|
AllNodes.push_back(N);
|
|
return SDOperand(N, 0);
|
|
}
|
|
|
|
SDOperand SelectionDAG::getNode(unsigned Opcode, MVT::ValueType VT,
|
|
SDOperand N1, SDOperand N2, SDOperand N3) {
|
|
// Perform various simplifications.
|
|
ConstantSDNode *N1C = dyn_cast<ConstantSDNode>(N1.Val);
|
|
ConstantSDNode *N2C = dyn_cast<ConstantSDNode>(N2.Val);
|
|
ConstantSDNode *N3C = dyn_cast<ConstantSDNode>(N3.Val);
|
|
switch (Opcode) {
|
|
case ISD::SETCC: {
|
|
// Use SimplifySetCC to simplify SETCC's.
|
|
SDOperand Simp = SimplifySetCC(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;
|
|
}
|
|
|
|
std::vector<SDOperand> Ops;
|
|
Ops.reserve(3);
|
|
Ops.push_back(N1);
|
|
Ops.push_back(N2);
|
|
Ops.push_back(N3);
|
|
|
|
// Memoize node if it doesn't produce a flag.
|
|
SDNode *N;
|
|
if (VT != MVT::Flag) {
|
|
SDNode *&E = OneResultNodes[std::make_pair(Opcode,std::make_pair(VT, Ops))];
|
|
if (E) return SDOperand(E, 0);
|
|
E = N = new SDNode(Opcode, N1, N2, N3);
|
|
} else {
|
|
N = new SDNode(Opcode, N1, N2, N3);
|
|
}
|
|
N->setValueTypes(VT);
|
|
AllNodes.push_back(N);
|
|
return SDOperand(N, 0);
|
|
}
|
|
|
|
SDOperand SelectionDAG::getNode(unsigned Opcode, MVT::ValueType VT,
|
|
SDOperand N1, SDOperand N2, SDOperand N3,
|
|
SDOperand N4) {
|
|
std::vector<SDOperand> Ops;
|
|
Ops.reserve(4);
|
|
Ops.push_back(N1);
|
|
Ops.push_back(N2);
|
|
Ops.push_back(N3);
|
|
Ops.push_back(N4);
|
|
return getNode(Opcode, VT, Ops);
|
|
}
|
|
|
|
SDOperand SelectionDAG::getNode(unsigned Opcode, MVT::ValueType VT,
|
|
SDOperand N1, SDOperand N2, SDOperand N3,
|
|
SDOperand N4, SDOperand N5) {
|
|
std::vector<SDOperand> Ops;
|
|
Ops.reserve(5);
|
|
Ops.push_back(N1);
|
|
Ops.push_back(N2);
|
|
Ops.push_back(N3);
|
|
Ops.push_back(N4);
|
|
Ops.push_back(N5);
|
|
return getNode(Opcode, VT, Ops);
|
|
}
|
|
|
|
SDOperand SelectionDAG::getNode(unsigned Opcode, MVT::ValueType VT,
|
|
SDOperand N1, SDOperand N2, SDOperand N3,
|
|
SDOperand N4, SDOperand N5, SDOperand N6) {
|
|
std::vector<SDOperand> Ops;
|
|
Ops.reserve(6);
|
|
Ops.push_back(N1);
|
|
Ops.push_back(N2);
|
|
Ops.push_back(N3);
|
|
Ops.push_back(N4);
|
|
Ops.push_back(N5);
|
|
Ops.push_back(N6);
|
|
return getNode(Opcode, VT, Ops);
|
|
}
|
|
|
|
// setAdjCallChain - This method changes the token chain of an
|
|
// CALLSEQ_START/END node to be the specified operand.
|
|
void SDNode::setAdjCallChain(SDOperand N) {
|
|
assert(N.getValueType() == MVT::Other);
|
|
assert((getOpcode() == ISD::CALLSEQ_START ||
|
|
getOpcode() == ISD::CALLSEQ_END) && "Cannot adjust this node!");
|
|
|
|
OperandList[0].Val->removeUser(this);
|
|
OperandList[0] = N;
|
|
OperandList[0].Val->Uses.push_back(this);
|
|
}
|
|
|
|
|
|
|
|
SDOperand SelectionDAG::getLoad(MVT::ValueType VT,
|
|
SDOperand Chain, SDOperand Ptr,
|
|
SDOperand SV) {
|
|
SDNode *&N = Loads[std::make_pair(Ptr, std::make_pair(Chain, VT))];
|
|
if (N) return SDOperand(N, 0);
|
|
N = new SDNode(ISD::LOAD, Chain, Ptr, SV);
|
|
|
|
// Loads have a token chain.
|
|
setNodeValueTypes(N, VT, MVT::Other);
|
|
AllNodes.push_back(N);
|
|
return SDOperand(N, 0);
|
|
}
|
|
|
|
SDOperand SelectionDAG::getVecLoad(unsigned Count, MVT::ValueType EVT,
|
|
SDOperand Chain, SDOperand Ptr,
|
|
SDOperand SV) {
|
|
SDNode *&N = Loads[std::make_pair(Ptr, std::make_pair(Chain, EVT))];
|
|
if (N) return SDOperand(N, 0);
|
|
std::vector<SDOperand> Ops;
|
|
Ops.reserve(5);
|
|
Ops.push_back(Chain);
|
|
Ops.push_back(Ptr);
|
|
Ops.push_back(getConstant(Count, MVT::i32));
|
|
Ops.push_back(getValueType(EVT));
|
|
Ops.push_back(SV);
|
|
std::vector<MVT::ValueType> VTs;
|
|
VTs.reserve(2);
|
|
VTs.push_back(MVT::Vector); VTs.push_back(MVT::Other); // Add token chain.
|
|
return getNode(ISD::VLOAD, VTs, Ops);
|
|
}
|
|
|
|
SDOperand SelectionDAG::getExtLoad(unsigned Opcode, MVT::ValueType VT,
|
|
SDOperand Chain, SDOperand Ptr, SDOperand SV,
|
|
MVT::ValueType EVT) {
|
|
std::vector<SDOperand> Ops;
|
|
Ops.reserve(4);
|
|
Ops.push_back(Chain);
|
|
Ops.push_back(Ptr);
|
|
Ops.push_back(SV);
|
|
Ops.push_back(getValueType(EVT));
|
|
std::vector<MVT::ValueType> VTs;
|
|
VTs.reserve(2);
|
|
VTs.push_back(VT); VTs.push_back(MVT::Other); // Add token chain.
|
|
return getNode(Opcode, VTs, Ops);
|
|
}
|
|
|
|
SDOperand SelectionDAG::getSrcValue(const Value *V, int Offset) {
|
|
assert((!V || isa<PointerType>(V->getType())) &&
|
|
"SrcValue is not a pointer?");
|
|
SDNode *&N = ValueNodes[std::make_pair(V, Offset)];
|
|
if (N) return SDOperand(N, 0);
|
|
|
|
N = new SrcValueSDNode(V, Offset);
|
|
AllNodes.push_back(N);
|
|
return SDOperand(N, 0);
|
|
}
|
|
|
|
SDOperand SelectionDAG::getNode(unsigned Opcode, MVT::ValueType VT,
|
|
std::vector<SDOperand> &Ops) {
|
|
switch (Ops.size()) {
|
|
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;
|
|
}
|
|
|
|
ConstantSDNode *N1C = dyn_cast<ConstantSDNode>(Ops[1].Val);
|
|
switch (Opcode) {
|
|
default: break;
|
|
case ISD::BRCONDTWOWAY:
|
|
if (N1C)
|
|
if (N1C->getValue()) // Unconditional branch to true dest.
|
|
return getNode(ISD::BR, MVT::Other, Ops[0], Ops[2]);
|
|
else // Unconditional branch to false dest.
|
|
return getNode(ISD::BR, MVT::Other, Ops[0], Ops[3]);
|
|
break;
|
|
case ISD::BRTWOWAY_CC:
|
|
assert(Ops.size() == 6 && "BRTWOWAY_CC takes 6 operands!");
|
|
assert(Ops[2].getValueType() == Ops[3].getValueType() &&
|
|
"LHS and RHS of comparison must have same type!");
|
|
break;
|
|
case ISD::TRUNCSTORE: {
|
|
assert(Ops.size() == 5 && "TRUNCSTORE takes 5 operands!");
|
|
MVT::ValueType EVT = cast<VTSDNode>(Ops[4])->getVT();
|
|
#if 0 // FIXME: If the target supports EVT natively, convert to a truncate/store
|
|
// If this is a truncating store of a constant, convert to the desired type
|
|
// and store it instead.
|
|
if (isa<Constant>(Ops[0])) {
|
|
SDOperand Op = getNode(ISD::TRUNCATE, EVT, N1);
|
|
if (isa<Constant>(Op))
|
|
N1 = Op;
|
|
}
|
|
// Also for ConstantFP?
|
|
#endif
|
|
if (Ops[0].getValueType() == EVT) // Normal store?
|
|
return getNode(ISD::STORE, VT, Ops[0], Ops[1], Ops[2], Ops[3]);
|
|
assert(Ops[1].getValueType() > EVT && "Not a truncation?");
|
|
assert(MVT::isInteger(Ops[1].getValueType()) == MVT::isInteger(EVT) &&
|
|
"Can't do FP-INT conversion!");
|
|
break;
|
|
}
|
|
case ISD::SELECT_CC: {
|
|
assert(Ops.size() == 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(Ops.size() == 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;
|
|
if (VT != MVT::Flag) {
|
|
SDNode *&E =
|
|
OneResultNodes[std::make_pair(Opcode, std::make_pair(VT, Ops))];
|
|
if (E) return SDOperand(E, 0);
|
|
E = N = new SDNode(Opcode, Ops);
|
|
} else {
|
|
N = new SDNode(Opcode, Ops);
|
|
}
|
|
N->setValueTypes(VT);
|
|
AllNodes.push_back(N);
|
|
return SDOperand(N, 0);
|
|
}
|
|
|
|
SDOperand SelectionDAG::getNode(unsigned Opcode,
|
|
std::vector<MVT::ValueType> &ResultTys,
|
|
std::vector<SDOperand> &Ops) {
|
|
if (ResultTys.size() == 1)
|
|
return getNode(Opcode, ResultTys[0], Ops);
|
|
|
|
switch (Opcode) {
|
|
case ISD::EXTLOAD:
|
|
case ISD::SEXTLOAD:
|
|
case ISD::ZEXTLOAD: {
|
|
MVT::ValueType EVT = cast<VTSDNode>(Ops[3])->getVT();
|
|
assert(Ops.size() == 4 && ResultTys.size() == 2 && "Bad *EXTLOAD!");
|
|
// If they are asking for an extending load from/to the same thing, return a
|
|
// normal load.
|
|
if (ResultTys[0] == EVT)
|
|
return getLoad(ResultTys[0], Ops[0], Ops[1], Ops[2]);
|
|
assert(EVT < ResultTys[0] &&
|
|
"Should only be an extending load, not truncating!");
|
|
assert((Opcode == ISD::EXTLOAD || MVT::isInteger(ResultTys[0])) &&
|
|
"Cannot sign/zero extend a FP load!");
|
|
assert(MVT::isInteger(ResultTys[0]) == MVT::isInteger(EVT) &&
|
|
"Cannot convert from FP to Int or Int -> FP!");
|
|
break;
|
|
}
|
|
|
|
// 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 = MVT::getSizeInBits(VT)*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 (ResultTys.back() != MVT::Flag) {
|
|
SDNode *&E =
|
|
ArbitraryNodes[std::make_pair(Opcode, std::make_pair(ResultTys, Ops))];
|
|
if (E) return SDOperand(E, 0);
|
|
E = N = new SDNode(Opcode, Ops);
|
|
} else {
|
|
N = new SDNode(Opcode, Ops);
|
|
}
|
|
setNodeValueTypes(N, ResultTys);
|
|
AllNodes.push_back(N);
|
|
return SDOperand(N, 0);
|
|
}
|
|
|
|
void SelectionDAG::setNodeValueTypes(SDNode *N,
|
|
std::vector<MVT::ValueType> &RetVals) {
|
|
switch (RetVals.size()) {
|
|
case 0: return;
|
|
case 1: N->setValueTypes(RetVals[0]); return;
|
|
case 2: setNodeValueTypes(N, RetVals[0], RetVals[1]); return;
|
|
default: break;
|
|
}
|
|
|
|
std::list<std::vector<MVT::ValueType> >::iterator I =
|
|
std::find(VTList.begin(), VTList.end(), RetVals);
|
|
if (I == VTList.end()) {
|
|
VTList.push_front(RetVals);
|
|
I = VTList.begin();
|
|
}
|
|
|
|
N->setValueTypes(&(*I)[0], I->size());
|
|
}
|
|
|
|
void SelectionDAG::setNodeValueTypes(SDNode *N, MVT::ValueType VT1,
|
|
MVT::ValueType VT2) {
|
|
for (std::list<std::vector<MVT::ValueType> >::iterator I = VTList.begin(),
|
|
E = VTList.end(); I != E; ++I) {
|
|
if (I->size() == 2 && (*I)[0] == VT1 && (*I)[1] == VT2) {
|
|
N->setValueTypes(&(*I)[0], 2);
|
|
return;
|
|
}
|
|
}
|
|
std::vector<MVT::ValueType> V;
|
|
V.push_back(VT1);
|
|
V.push_back(VT2);
|
|
VTList.push_front(V);
|
|
N->setValueTypes(&(*VTList.begin())[0], 2);
|
|
}
|
|
|
|
|
|
/// 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.
|
|
SDOperand SelectionDAG::SelectNodeTo(SDNode *N, unsigned TargetOpc,
|
|
MVT::ValueType VT) {
|
|
// If an identical node already exists, use it.
|
|
SDNode *&ON = NullaryOps[std::make_pair(ISD::BUILTIN_OP_END+TargetOpc, VT)];
|
|
if (ON) return SDOperand(ON, 0);
|
|
|
|
RemoveNodeFromCSEMaps(N);
|
|
|
|
N->MorphNodeTo(ISD::BUILTIN_OP_END+TargetOpc);
|
|
N->setValueTypes(VT);
|
|
|
|
ON = N; // Memoize the new node.
|
|
return SDOperand(N, 0);
|
|
}
|
|
|
|
SDOperand SelectionDAG::SelectNodeTo(SDNode *N, unsigned TargetOpc,
|
|
MVT::ValueType VT, SDOperand Op1) {
|
|
// If an identical node already exists, use it.
|
|
SDNode *&ON = UnaryOps[std::make_pair(ISD::BUILTIN_OP_END+TargetOpc,
|
|
std::make_pair(Op1, VT))];
|
|
if (ON) return SDOperand(ON, 0);
|
|
|
|
RemoveNodeFromCSEMaps(N);
|
|
N->MorphNodeTo(ISD::BUILTIN_OP_END+TargetOpc);
|
|
N->setValueTypes(VT);
|
|
N->setOperands(Op1);
|
|
|
|
ON = N; // Memoize the new node.
|
|
return SDOperand(N, 0);
|
|
}
|
|
|
|
SDOperand SelectionDAG::SelectNodeTo(SDNode *N, unsigned TargetOpc,
|
|
MVT::ValueType VT, SDOperand Op1,
|
|
SDOperand Op2) {
|
|
// If an identical node already exists, use it.
|
|
SDNode *&ON = BinaryOps[std::make_pair(ISD::BUILTIN_OP_END+TargetOpc,
|
|
std::make_pair(Op1, Op2))];
|
|
if (ON) return SDOperand(ON, 0);
|
|
|
|
RemoveNodeFromCSEMaps(N);
|
|
N->MorphNodeTo(ISD::BUILTIN_OP_END+TargetOpc);
|
|
N->setValueTypes(VT);
|
|
N->setOperands(Op1, Op2);
|
|
|
|
ON = N; // Memoize the new node.
|
|
return SDOperand(N, 0);
|
|
}
|
|
|
|
SDOperand SelectionDAG::SelectNodeTo(SDNode *N, unsigned TargetOpc,
|
|
MVT::ValueType VT, SDOperand Op1,
|
|
SDOperand Op2, SDOperand Op3) {
|
|
// If an identical node already exists, use it.
|
|
std::vector<SDOperand> OpList;
|
|
OpList.push_back(Op1); OpList.push_back(Op2); OpList.push_back(Op3);
|
|
SDNode *&ON = OneResultNodes[std::make_pair(ISD::BUILTIN_OP_END+TargetOpc,
|
|
std::make_pair(VT, OpList))];
|
|
if (ON) return SDOperand(ON, 0);
|
|
|
|
RemoveNodeFromCSEMaps(N);
|
|
N->MorphNodeTo(ISD::BUILTIN_OP_END+TargetOpc);
|
|
N->setValueTypes(VT);
|
|
N->setOperands(Op1, Op2, Op3);
|
|
|
|
ON = N; // Memoize the new node.
|
|
return SDOperand(N, 0);
|
|
}
|
|
|
|
SDOperand SelectionDAG::SelectNodeTo(SDNode *N, unsigned TargetOpc,
|
|
MVT::ValueType VT, SDOperand Op1,
|
|
SDOperand Op2, SDOperand Op3,
|
|
SDOperand Op4) {
|
|
// If an identical node already exists, use it.
|
|
std::vector<SDOperand> OpList;
|
|
OpList.push_back(Op1); OpList.push_back(Op2); OpList.push_back(Op3);
|
|
OpList.push_back(Op4);
|
|
SDNode *&ON = OneResultNodes[std::make_pair(ISD::BUILTIN_OP_END+TargetOpc,
|
|
std::make_pair(VT, OpList))];
|
|
if (ON) return SDOperand(ON, 0);
|
|
|
|
RemoveNodeFromCSEMaps(N);
|
|
N->MorphNodeTo(ISD::BUILTIN_OP_END+TargetOpc);
|
|
N->setValueTypes(VT);
|
|
N->setOperands(Op1, Op2, Op3, Op4);
|
|
|
|
ON = N; // Memoize the new node.
|
|
return SDOperand(N, 0);
|
|
}
|
|
|
|
SDOperand SelectionDAG::SelectNodeTo(SDNode *N, unsigned TargetOpc,
|
|
MVT::ValueType VT, SDOperand Op1,
|
|
SDOperand Op2, SDOperand Op3,SDOperand Op4,
|
|
SDOperand Op5) {
|
|
// If an identical node already exists, use it.
|
|
std::vector<SDOperand> OpList;
|
|
OpList.push_back(Op1); OpList.push_back(Op2); OpList.push_back(Op3);
|
|
OpList.push_back(Op4); OpList.push_back(Op5);
|
|
SDNode *&ON = OneResultNodes[std::make_pair(ISD::BUILTIN_OP_END+TargetOpc,
|
|
std::make_pair(VT, OpList))];
|
|
if (ON) return SDOperand(ON, 0);
|
|
|
|
RemoveNodeFromCSEMaps(N);
|
|
N->MorphNodeTo(ISD::BUILTIN_OP_END+TargetOpc);
|
|
N->setValueTypes(VT);
|
|
N->setOperands(Op1, Op2, Op3, Op4, Op5);
|
|
|
|
ON = N; // Memoize the new node.
|
|
return SDOperand(N, 0);
|
|
}
|
|
|
|
SDOperand SelectionDAG::SelectNodeTo(SDNode *N, unsigned TargetOpc,
|
|
MVT::ValueType VT, SDOperand Op1,
|
|
SDOperand Op2, SDOperand Op3,SDOperand Op4,
|
|
SDOperand Op5, SDOperand Op6) {
|
|
// If an identical node already exists, use it.
|
|
std::vector<SDOperand> OpList;
|
|
OpList.push_back(Op1); OpList.push_back(Op2); OpList.push_back(Op3);
|
|
OpList.push_back(Op4); OpList.push_back(Op5); OpList.push_back(Op6);
|
|
SDNode *&ON = OneResultNodes[std::make_pair(ISD::BUILTIN_OP_END+TargetOpc,
|
|
std::make_pair(VT, OpList))];
|
|
if (ON) return SDOperand(ON, 0);
|
|
|
|
RemoveNodeFromCSEMaps(N);
|
|
N->MorphNodeTo(ISD::BUILTIN_OP_END+TargetOpc);
|
|
N->setValueTypes(VT);
|
|
N->setOperands(Op1, Op2, Op3, Op4, Op5, Op6);
|
|
|
|
ON = N; // Memoize the new node.
|
|
return SDOperand(N, 0);
|
|
}
|
|
|
|
SDOperand SelectionDAG::SelectNodeTo(SDNode *N, unsigned TargetOpc,
|
|
MVT::ValueType VT1, MVT::ValueType VT2,
|
|
SDOperand Op1, SDOperand Op2) {
|
|
// If an identical node already exists, use it.
|
|
std::vector<SDOperand> OpList;
|
|
OpList.push_back(Op1); OpList.push_back(Op2);
|
|
std::vector<MVT::ValueType> VTList;
|
|
VTList.push_back(VT1); VTList.push_back(VT2);
|
|
SDNode *&ON = ArbitraryNodes[std::make_pair(ISD::BUILTIN_OP_END+TargetOpc,
|
|
std::make_pair(VTList, OpList))];
|
|
if (ON) return SDOperand(ON, 0);
|
|
|
|
RemoveNodeFromCSEMaps(N);
|
|
N->MorphNodeTo(ISD::BUILTIN_OP_END+TargetOpc);
|
|
setNodeValueTypes(N, VT1, VT2);
|
|
N->setOperands(Op1, Op2);
|
|
|
|
ON = N; // Memoize the new node.
|
|
return SDOperand(N, 0);
|
|
}
|
|
|
|
SDOperand SelectionDAG::SelectNodeTo(SDNode *N, unsigned TargetOpc,
|
|
MVT::ValueType VT1, MVT::ValueType VT2,
|
|
SDOperand Op1, SDOperand Op2,
|
|
SDOperand Op3) {
|
|
// If an identical node already exists, use it.
|
|
std::vector<SDOperand> OpList;
|
|
OpList.push_back(Op1); OpList.push_back(Op2); OpList.push_back(Op3);
|
|
std::vector<MVT::ValueType> VTList;
|
|
VTList.push_back(VT1); VTList.push_back(VT2);
|
|
SDNode *&ON = ArbitraryNodes[std::make_pair(ISD::BUILTIN_OP_END+TargetOpc,
|
|
std::make_pair(VTList, OpList))];
|
|
if (ON) return SDOperand(ON, 0);
|
|
|
|
RemoveNodeFromCSEMaps(N);
|
|
N->MorphNodeTo(ISD::BUILTIN_OP_END+TargetOpc);
|
|
setNodeValueTypes(N, VT1, VT2);
|
|
N->setOperands(Op1, Op2, Op3);
|
|
|
|
ON = N; // Memoize the new node.
|
|
return SDOperand(N, 0);
|
|
}
|
|
|
|
SDOperand SelectionDAG::SelectNodeTo(SDNode *N, unsigned TargetOpc,
|
|
MVT::ValueType VT1, MVT::ValueType VT2,
|
|
SDOperand Op1, SDOperand Op2,
|
|
SDOperand Op3, SDOperand Op4) {
|
|
// If an identical node already exists, use it.
|
|
std::vector<SDOperand> OpList;
|
|
OpList.push_back(Op1); OpList.push_back(Op2); OpList.push_back(Op3);
|
|
OpList.push_back(Op4);
|
|
std::vector<MVT::ValueType> VTList;
|
|
VTList.push_back(VT1); VTList.push_back(VT2);
|
|
SDNode *&ON = ArbitraryNodes[std::make_pair(ISD::BUILTIN_OP_END+TargetOpc,
|
|
std::make_pair(VTList, OpList))];
|
|
if (ON) return SDOperand(ON, 0);
|
|
|
|
RemoveNodeFromCSEMaps(N);
|
|
N->MorphNodeTo(ISD::BUILTIN_OP_END+TargetOpc);
|
|
setNodeValueTypes(N, VT1, VT2);
|
|
N->setOperands(Op1, Op2, Op3, Op4);
|
|
|
|
ON = N; // Memoize the new node.
|
|
return SDOperand(N, 0);
|
|
}
|
|
|
|
SDOperand SelectionDAG::SelectNodeTo(SDNode *N, unsigned TargetOpc,
|
|
MVT::ValueType VT1, MVT::ValueType VT2,
|
|
SDOperand Op1, SDOperand Op2,
|
|
SDOperand Op3, SDOperand Op4,
|
|
SDOperand Op5) {
|
|
// If an identical node already exists, use it.
|
|
std::vector<SDOperand> OpList;
|
|
OpList.push_back(Op1); OpList.push_back(Op2); OpList.push_back(Op3);
|
|
OpList.push_back(Op4); OpList.push_back(Op5);
|
|
std::vector<MVT::ValueType> VTList;
|
|
VTList.push_back(VT1); VTList.push_back(VT2);
|
|
SDNode *&ON = ArbitraryNodes[std::make_pair(ISD::BUILTIN_OP_END+TargetOpc,
|
|
std::make_pair(VTList, OpList))];
|
|
if (ON) return SDOperand(ON, 0);
|
|
|
|
RemoveNodeFromCSEMaps(N);
|
|
N->MorphNodeTo(ISD::BUILTIN_OP_END+TargetOpc);
|
|
setNodeValueTypes(N, VT1, VT2);
|
|
N->setOperands(Op1, Op2, Op3, Op4, Op5);
|
|
|
|
ON = N; // Memoize the new node.
|
|
return SDOperand(N, 0);
|
|
}
|
|
|
|
// 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 a single result value.
|
|
///
|
|
void SelectionDAG::ReplaceAllUsesWith(SDOperand FromN, SDOperand ToN,
|
|
std::vector<SDNode*> *Deleted) {
|
|
SDNode *From = FromN.Val, *To = ToN.Val;
|
|
assert(From->getNumValues() == 1 && To->getNumValues() == 1 &&
|
|
"Cannot replace with this method!");
|
|
assert(From != To && "Cannot replace uses of with self");
|
|
|
|
while (!From->use_empty()) {
|
|
// Process users until they are all gone.
|
|
SDNode *U = *From->use_begin();
|
|
|
|
// This node is about to morph, remove its old self from the CSE maps.
|
|
RemoveNodeFromCSEMaps(U);
|
|
|
|
for (SDOperand *I = U->OperandList, *E = U->OperandList+U->NumOperands;
|
|
I != E; ++I)
|
|
if (I->Val == From) {
|
|
From->removeUser(U);
|
|
I->Val = To;
|
|
To->addUser(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, Deleted);
|
|
// U is now dead.
|
|
if (Deleted) Deleted->push_back(U);
|
|
DeleteNodeNotInCSEMaps(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,
|
|
std::vector<SDNode*> *Deleted) {
|
|
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.
|
|
ReplaceAllUsesWith(SDOperand(From, 0), SDOperand(To, 0), Deleted);
|
|
return;
|
|
}
|
|
|
|
while (!From->use_empty()) {
|
|
// Process users until they are all gone.
|
|
SDNode *U = *From->use_begin();
|
|
|
|
// This node is about to morph, remove its old self from the CSE maps.
|
|
RemoveNodeFromCSEMaps(U);
|
|
|
|
for (SDOperand *I = U->OperandList, *E = U->OperandList+U->NumOperands;
|
|
I != E; ++I)
|
|
if (I->Val == From) {
|
|
From->removeUser(U);
|
|
I->Val = To;
|
|
To->addUser(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, Deleted);
|
|
// U is now dead.
|
|
if (Deleted) Deleted->push_back(U);
|
|
DeleteNodeNotInCSEMaps(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,
|
|
const std::vector<SDOperand> &To,
|
|
std::vector<SDNode*> *Deleted) {
|
|
assert(From->getNumValues() == To.size() &&
|
|
"Incorrect number of values to replace with!");
|
|
if (To.size() == 1 && To[0].Val->getNumValues() == 1) {
|
|
// Degenerate case handled above.
|
|
ReplaceAllUsesWith(SDOperand(From, 0), To[0], Deleted);
|
|
return;
|
|
}
|
|
|
|
while (!From->use_empty()) {
|
|
// Process users until they are all gone.
|
|
SDNode *U = *From->use_begin();
|
|
|
|
// This node is about to morph, remove its old self from the CSE maps.
|
|
RemoveNodeFromCSEMaps(U);
|
|
|
|
for (SDOperand *I = U->OperandList, *E = U->OperandList+U->NumOperands;
|
|
I != E; ++I)
|
|
if (I->Val == From) {
|
|
const SDOperand &ToOp = To[I->ResNo];
|
|
From->removeUser(U);
|
|
*I = ToOp;
|
|
ToOp.Val->addUser(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, Deleted);
|
|
// U is now dead.
|
|
if (Deleted) Deleted->push_back(U);
|
|
DeleteNodeNotInCSEMaps(U);
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
//===----------------------------------------------------------------------===//
|
|
// SDNode Class
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
|
|
/// getValueTypeList - Return a pointer to the specified value type.
|
|
///
|
|
MVT::ValueType *SDNode::getValueTypeList(MVT::ValueType VT) {
|
|
static MVT::ValueType VTs[MVT::LAST_VALUETYPE];
|
|
VTs[VT] = VT;
|
|
return &VTs[VT];
|
|
}
|
|
|
|
/// 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) {
|
|
assert(Value < getNumValues() && "Bad value!");
|
|
|
|
// If there is only one value, this is easy.
|
|
if (getNumValues() == 1)
|
|
return use_size() == NUses;
|
|
if (Uses.size() < NUses) return false;
|
|
|
|
SDOperand TheValue(this, Value);
|
|
|
|
std::set<SDNode*> UsersHandled;
|
|
|
|
for (std::vector<SDNode*>::iterator UI = Uses.begin(), E = Uses.end();
|
|
UI != E; ++UI) {
|
|
SDNode *User = *UI;
|
|
if (User->getNumOperands() == 1 ||
|
|
UsersHandled.insert(User).second) // First time we've seen this?
|
|
for (unsigned i = 0, e = User->getNumOperands(); i != e; ++i)
|
|
if (User->getOperand(i) == TheValue) {
|
|
if (NUses == 0)
|
|
return false; // too many uses
|
|
--NUses;
|
|
}
|
|
}
|
|
|
|
// Found exactly the right number of uses?
|
|
return NUses == 0;
|
|
}
|
|
|
|
|
|
const char *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->getName(getOpcode()-ISD::BUILTIN_OP_END);
|
|
return "<<Unknown Target Node>>";
|
|
}
|
|
|
|
case ISD::PCMARKER: return "PCMarker";
|
|
case ISD::READCYCLECOUNTER: return "ReadCycleCounter";
|
|
case ISD::SRCVALUE: return "SrcValue";
|
|
case ISD::VALUETYPE: return "ValueType";
|
|
case ISD::STRING: return "String";
|
|
case ISD::EntryToken: return "EntryToken";
|
|
case ISD::TokenFactor: return "TokenFactor";
|
|
case ISD::AssertSext: return "AssertSext";
|
|
case ISD::AssertZext: return "AssertZext";
|
|
case ISD::Constant: return "Constant";
|
|
case ISD::TargetConstant: return "TargetConstant";
|
|
case ISD::ConstantFP: return "ConstantFP";
|
|
case ISD::ConstantVec: return "ConstantVec";
|
|
case ISD::GlobalAddress: return "GlobalAddress";
|
|
case ISD::TargetGlobalAddress: return "TargetGlobalAddress";
|
|
case ISD::FrameIndex: return "FrameIndex";
|
|
case ISD::TargetFrameIndex: return "TargetFrameIndex";
|
|
case ISD::BasicBlock: return "BasicBlock";
|
|
case ISD::Register: return "Register";
|
|
case ISD::ExternalSymbol: return "ExternalSymbol";
|
|
case ISD::TargetExternalSymbol: return "TargetExternalSymbol";
|
|
case ISD::ConstantPool: return "ConstantPool";
|
|
case ISD::TargetConstantPool: return "TargetConstantPool";
|
|
case ISD::CopyToReg: return "CopyToReg";
|
|
case ISD::CopyFromReg: return "CopyFromReg";
|
|
case ISD::ImplicitDef: return "ImplicitDef";
|
|
case ISD::UNDEF: return "undef";
|
|
|
|
// 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";
|
|
|
|
// 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::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::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::VADD: return "vadd";
|
|
case ISD::VSUB: return "vsub";
|
|
case ISD::VMUL: return "vmul";
|
|
|
|
case ISD::SETCC: return "setcc";
|
|
case ISD::SELECT: return "select";
|
|
case ISD::SELECT_CC: return "select_cc";
|
|
case ISD::ADD_PARTS: return "add_parts";
|
|
case ISD::SUB_PARTS: return "sub_parts";
|
|
case ISD::SHL_PARTS: return "shl_parts";
|
|
case ISD::SRA_PARTS: return "sra_parts";
|
|
case ISD::SRL_PARTS: return "srl_parts";
|
|
|
|
// 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::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";
|
|
|
|
// Control flow instructions
|
|
case ISD::BR: return "br";
|
|
case ISD::BRCOND: return "brcond";
|
|
case ISD::BRCONDTWOWAY: return "brcondtwoway";
|
|
case ISD::BR_CC: return "br_cc";
|
|
case ISD::BRTWOWAY_CC: return "brtwoway_cc";
|
|
case ISD::RET: return "ret";
|
|
case ISD::CALL: return "call";
|
|
case ISD::TAILCALL:return "tailcall";
|
|
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::VLOAD: return "vload";
|
|
case ISD::EXTLOAD: return "extload";
|
|
case ISD::SEXTLOAD: return "sextload";
|
|
case ISD::ZEXTLOAD: return "zextload";
|
|
case ISD::TRUNCSTORE: return "truncstore";
|
|
|
|
case ISD::DYNAMIC_STACKALLOC: return "dynamic_stackalloc";
|
|
case ISD::EXTRACT_ELEMENT: return "extract_element";
|
|
case ISD::BUILD_PAIR: return "build_pair";
|
|
case ISD::MEMSET: return "memset";
|
|
case ISD::MEMCPY: return "memcpy";
|
|
case ISD::MEMMOVE: return "memmove";
|
|
|
|
// Bit counting
|
|
case ISD::CTPOP: return "ctpop";
|
|
case ISD::CTTZ: return "cttz";
|
|
case ISD::CTLZ: return "ctlz";
|
|
|
|
// IO Intrinsics
|
|
case ISD::READPORT: return "readport";
|
|
case ISD::WRITEPORT: return "writeport";
|
|
case ISD::READIO: return "readio";
|
|
case ISD::WRITEIO: return "writeio";
|
|
|
|
// Debug info
|
|
case ISD::LOCATION: return "location";
|
|
|
|
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";
|
|
}
|
|
}
|
|
}
|
|
|
|
void SDNode::dump() const { dump(0); }
|
|
void SDNode::dump(const SelectionDAG *G) const {
|
|
std::cerr << (void*)this << ": ";
|
|
|
|
for (unsigned i = 0, e = getNumValues(); i != e; ++i) {
|
|
if (i) std::cerr << ",";
|
|
if (getValueType(i) == MVT::Other)
|
|
std::cerr << "ch";
|
|
else
|
|
std::cerr << MVT::getValueTypeString(getValueType(i));
|
|
}
|
|
std::cerr << " = " << getOperationName(G);
|
|
|
|
std::cerr << " ";
|
|
for (unsigned i = 0, e = getNumOperands(); i != e; ++i) {
|
|
if (i) std::cerr << ", ";
|
|
std::cerr << (void*)getOperand(i).Val;
|
|
if (unsigned RN = getOperand(i).ResNo)
|
|
std::cerr << ":" << RN;
|
|
}
|
|
|
|
if (const ConstantSDNode *CSDN = dyn_cast<ConstantSDNode>(this)) {
|
|
std::cerr << "<" << CSDN->getValue() << ">";
|
|
} else if (const ConstantFPSDNode *CSDN = dyn_cast<ConstantFPSDNode>(this)) {
|
|
std::cerr << "<" << CSDN->getValue() << ">";
|
|
} else if (const GlobalAddressSDNode *GADN =
|
|
dyn_cast<GlobalAddressSDNode>(this)) {
|
|
int offset = GADN->getOffset();
|
|
std::cerr << "<";
|
|
WriteAsOperand(std::cerr, GADN->getGlobal()) << ">";
|
|
if (offset > 0)
|
|
std::cerr << " + " << offset;
|
|
else
|
|
std::cerr << " " << offset;
|
|
} else if (const FrameIndexSDNode *FIDN = dyn_cast<FrameIndexSDNode>(this)) {
|
|
std::cerr << "<" << FIDN->getIndex() << ">";
|
|
} else if (const ConstantPoolSDNode *CP = dyn_cast<ConstantPoolSDNode>(this)){
|
|
std::cerr << "<" << *CP->get() << ">";
|
|
} else if (const BasicBlockSDNode *BBDN = dyn_cast<BasicBlockSDNode>(this)) {
|
|
std::cerr << "<";
|
|
const Value *LBB = (const Value*)BBDN->getBasicBlock()->getBasicBlock();
|
|
if (LBB)
|
|
std::cerr << LBB->getName() << " ";
|
|
std::cerr << (const void*)BBDN->getBasicBlock() << ">";
|
|
} else if (const RegisterSDNode *R = dyn_cast<RegisterSDNode>(this)) {
|
|
if (G && MRegisterInfo::isPhysicalRegister(R->getReg())) {
|
|
std::cerr << " " <<G->getTarget().getRegisterInfo()->getName(R->getReg());
|
|
} else {
|
|
std::cerr << " #" << R->getReg();
|
|
}
|
|
} else if (const ExternalSymbolSDNode *ES =
|
|
dyn_cast<ExternalSymbolSDNode>(this)) {
|
|
std::cerr << "'" << ES->getSymbol() << "'";
|
|
} else if (const SrcValueSDNode *M = dyn_cast<SrcValueSDNode>(this)) {
|
|
if (M->getValue())
|
|
std::cerr << "<" << M->getValue() << ":" << M->getOffset() << ">";
|
|
else
|
|
std::cerr << "<null:" << M->getOffset() << ">";
|
|
} else if (const VTSDNode *N = dyn_cast<VTSDNode>(this)) {
|
|
std::cerr << ":" << getValueTypeString(N->getVT());
|
|
}
|
|
}
|
|
|
|
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
|
|
std::cerr << "\n" << std::string(indent+2, ' ')
|
|
<< (void*)N->getOperand(i).Val << ": <multiple use>";
|
|
|
|
|
|
std::cerr << "\n" << std::string(indent, ' ');
|
|
N->dump(G);
|
|
}
|
|
|
|
void SelectionDAG::dump() const {
|
|
std::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);
|
|
}
|
|
|
|
DumpNodes(getRoot().Val, 2, this);
|
|
|
|
std::cerr << "\n\n";
|
|
}
|
|
|