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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@27146 91177308-0d34-0410-b5e6-96231b3b80d8
4569 lines
177 KiB
C++
4569 lines
177 KiB
C++
//===-- LegalizeDAG.cpp - Implement SelectionDAG::Legalize ----------------===//
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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 file implements the SelectionDAG::Legalize method.
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//
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//===----------------------------------------------------------------------===//
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#include "llvm/CodeGen/SelectionDAG.h"
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#include "llvm/CodeGen/MachineFunction.h"
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#include "llvm/CodeGen/MachineFrameInfo.h"
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#include "llvm/Support/MathExtras.h"
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#include "llvm/Target/TargetLowering.h"
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#include "llvm/Target/TargetData.h"
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#include "llvm/Target/TargetOptions.h"
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#include "llvm/CallingConv.h"
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#include "llvm/Constants.h"
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#include <iostream>
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#include <map>
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using namespace llvm;
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//===----------------------------------------------------------------------===//
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/// SelectionDAGLegalize - This takes an arbitrary SelectionDAG as input and
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/// hacks on it until the target machine can handle it. This involves
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/// eliminating value sizes the machine cannot handle (promoting small sizes to
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/// large sizes or splitting up large values into small values) as well as
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/// eliminating operations the machine cannot handle.
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///
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/// This code also does a small amount of optimization and recognition of idioms
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/// as part of its processing. For example, if a target does not support a
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/// 'setcc' instruction efficiently, but does support 'brcc' instruction, this
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/// will attempt merge setcc and brc instructions into brcc's.
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///
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namespace {
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class SelectionDAGLegalize {
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TargetLowering &TLI;
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SelectionDAG &DAG;
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// Libcall insertion helpers.
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/// LastCALLSEQ_END - This keeps track of the CALLSEQ_END node that has been
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/// legalized. We use this to ensure that calls are properly serialized
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/// against each other, including inserted libcalls.
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SDOperand LastCALLSEQ_END;
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/// IsLegalizingCall - This member is used *only* for purposes of providing
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/// helpful assertions that a libcall isn't created while another call is
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/// being legalized (which could lead to non-serialized call sequences).
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bool IsLegalizingCall;
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enum LegalizeAction {
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Legal, // The target natively supports this operation.
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Promote, // This operation should be executed in a larger type.
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Expand, // Try to expand this to other ops, otherwise use a libcall.
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};
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/// ValueTypeActions - This is a bitvector that contains two bits for each
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/// value type, where the two bits correspond to the LegalizeAction enum.
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/// This can be queried with "getTypeAction(VT)".
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TargetLowering::ValueTypeActionImpl ValueTypeActions;
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/// LegalizedNodes - For nodes that are of legal width, and that have more
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/// than one use, this map indicates what regularized operand to use. This
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/// allows us to avoid legalizing the same thing more than once.
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std::map<SDOperand, SDOperand> LegalizedNodes;
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/// PromotedNodes - For nodes that are below legal width, and that have more
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/// than one use, this map indicates what promoted value to use. This allows
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/// us to avoid promoting the same thing more than once.
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std::map<SDOperand, SDOperand> PromotedNodes;
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/// ExpandedNodes - For nodes that need to be expanded this map indicates
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/// which which operands are the expanded version of the input. This allows
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/// us to avoid expanding the same node more than once.
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std::map<SDOperand, std::pair<SDOperand, SDOperand> > ExpandedNodes;
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/// SplitNodes - For vector nodes that need to be split, this map indicates
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/// which which operands are the split version of the input. This allows us
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/// to avoid splitting the same node more than once.
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std::map<SDOperand, std::pair<SDOperand, SDOperand> > SplitNodes;
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/// PackedNodes - For nodes that need to be packed from MVT::Vector types to
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/// concrete packed types, this contains the mapping of ones we have already
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/// processed to the result.
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std::map<SDOperand, SDOperand> PackedNodes;
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void AddLegalizedOperand(SDOperand From, SDOperand To) {
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LegalizedNodes.insert(std::make_pair(From, To));
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// If someone requests legalization of the new node, return itself.
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if (From != To)
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LegalizedNodes.insert(std::make_pair(To, To));
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}
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void AddPromotedOperand(SDOperand From, SDOperand To) {
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bool isNew = PromotedNodes.insert(std::make_pair(From, To)).second;
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assert(isNew && "Got into the map somehow?");
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// If someone requests legalization of the new node, return itself.
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LegalizedNodes.insert(std::make_pair(To, To));
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}
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public:
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SelectionDAGLegalize(SelectionDAG &DAG);
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/// getTypeAction - Return how we should legalize values of this type, either
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/// it is already legal or we need to expand it into multiple registers of
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/// smaller integer type, or we need to promote it to a larger type.
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LegalizeAction getTypeAction(MVT::ValueType VT) const {
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return (LegalizeAction)ValueTypeActions.getTypeAction(VT);
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}
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/// isTypeLegal - Return true if this type is legal on this target.
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///
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bool isTypeLegal(MVT::ValueType VT) const {
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return getTypeAction(VT) == Legal;
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}
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void LegalizeDAG();
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private:
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/// HandleOp - Legalize, Promote, Expand or Pack the specified operand as
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/// appropriate for its type.
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void HandleOp(SDOperand Op);
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/// LegalizeOp - We know that the specified value has a legal type.
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/// Recursively ensure that the operands have legal types, then return the
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/// result.
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SDOperand LegalizeOp(SDOperand O);
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/// PromoteOp - Given an operation that produces a value in an invalid type,
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/// promote it to compute the value into a larger type. The produced value
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/// will have the correct bits for the low portion of the register, but no
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/// guarantee is made about the top bits: it may be zero, sign-extended, or
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/// garbage.
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SDOperand PromoteOp(SDOperand O);
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/// ExpandOp - Expand the specified SDOperand into its two component pieces
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/// Lo&Hi. Note that the Op MUST be an expanded type. As a result of this,
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/// the LegalizeNodes map is filled in for any results that are not expanded,
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/// the ExpandedNodes map is filled in for any results that are expanded, and
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/// the Lo/Hi values are returned. This applies to integer types and Vector
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/// types.
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void ExpandOp(SDOperand O, SDOperand &Lo, SDOperand &Hi);
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/// SplitVectorOp - Given an operand of MVT::Vector type, break it down into
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/// two smaller values of MVT::Vector type.
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void SplitVectorOp(SDOperand O, SDOperand &Lo, SDOperand &Hi);
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/// PackVectorOp - Given an operand of MVT::Vector type, convert it into the
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/// equivalent operation that returns a packed value (e.g. MVT::V4F32). When
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/// this is called, we know that PackedVT is the right type for the result and
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/// we know that this type is legal for the target.
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SDOperand PackVectorOp(SDOperand O, MVT::ValueType PackedVT);
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bool LegalizeAllNodesNotLeadingTo(SDNode *N, SDNode *Dest);
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void LegalizeSetCCOperands(SDOperand &LHS, SDOperand &RHS, SDOperand &CC);
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SDOperand CreateStackTemporary(MVT::ValueType VT);
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SDOperand ExpandLibCall(const char *Name, SDNode *Node,
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SDOperand &Hi);
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SDOperand ExpandIntToFP(bool isSigned, MVT::ValueType DestTy,
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SDOperand Source);
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SDOperand ExpandBIT_CONVERT(MVT::ValueType DestVT, SDOperand SrcOp);
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SDOperand ExpandBUILD_VECTOR(SDNode *Node);
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SDOperand ExpandLegalINT_TO_FP(bool isSigned,
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SDOperand LegalOp,
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MVT::ValueType DestVT);
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SDOperand PromoteLegalINT_TO_FP(SDOperand LegalOp, MVT::ValueType DestVT,
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bool isSigned);
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SDOperand PromoteLegalFP_TO_INT(SDOperand LegalOp, MVT::ValueType DestVT,
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bool isSigned);
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SDOperand ExpandBSWAP(SDOperand Op);
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SDOperand ExpandBitCount(unsigned Opc, SDOperand Op);
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bool ExpandShift(unsigned Opc, SDOperand Op, SDOperand Amt,
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SDOperand &Lo, SDOperand &Hi);
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void ExpandShiftParts(unsigned NodeOp, SDOperand Op, SDOperand Amt,
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SDOperand &Lo, SDOperand &Hi);
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SDOperand getIntPtrConstant(uint64_t Val) {
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return DAG.getConstant(Val, TLI.getPointerTy());
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}
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};
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}
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/// getScalarizedOpcode - Return the scalar opcode that corresponds to the
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/// specified vector opcode.
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static unsigned getScalarizedOpcode(unsigned VecOp, MVT::ValueType VT) {
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switch (VecOp) {
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default: assert(0 && "Don't know how to scalarize this opcode!");
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case ISD::VADD: return MVT::isInteger(VT) ? ISD::ADD : ISD::FADD;
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case ISD::VSUB: return MVT::isInteger(VT) ? ISD::SUB : ISD::FSUB;
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case ISD::VMUL: return MVT::isInteger(VT) ? ISD::MUL : ISD::FMUL;
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case ISD::VSDIV: return MVT::isInteger(VT) ? ISD::SDIV: ISD::FDIV;
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case ISD::VUDIV: return MVT::isInteger(VT) ? ISD::UDIV: ISD::FDIV;
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case ISD::VAND: return MVT::isInteger(VT) ? ISD::AND : 0;
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case ISD::VOR: return MVT::isInteger(VT) ? ISD::OR : 0;
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case ISD::VXOR: return MVT::isInteger(VT) ? ISD::XOR : 0;
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}
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}
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SelectionDAGLegalize::SelectionDAGLegalize(SelectionDAG &dag)
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: TLI(dag.getTargetLoweringInfo()), DAG(dag),
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ValueTypeActions(TLI.getValueTypeActions()) {
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assert(MVT::LAST_VALUETYPE <= 32 &&
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"Too many value types for ValueTypeActions to hold!");
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}
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/// ComputeTopDownOrdering - Add the specified node to the Order list if it has
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/// not been visited yet and if all of its operands have already been visited.
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static void ComputeTopDownOrdering(SDNode *N, std::vector<SDNode*> &Order,
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std::map<SDNode*, unsigned> &Visited) {
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if (++Visited[N] != N->getNumOperands())
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return; // Haven't visited all operands yet
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Order.push_back(N);
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if (N->hasOneUse()) { // Tail recurse in common case.
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ComputeTopDownOrdering(*N->use_begin(), Order, Visited);
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return;
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}
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// Now that we have N in, add anything that uses it if all of their operands
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// are now done.
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for (SDNode::use_iterator UI = N->use_begin(), E = N->use_end(); UI != E;++UI)
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ComputeTopDownOrdering(*UI, Order, Visited);
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}
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void SelectionDAGLegalize::LegalizeDAG() {
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LastCALLSEQ_END = DAG.getEntryNode();
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IsLegalizingCall = false;
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// The legalize process is inherently a bottom-up recursive process (users
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// legalize their uses before themselves). Given infinite stack space, we
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// could just start legalizing on the root and traverse the whole graph. In
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// practice however, this causes us to run out of stack space on large basic
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// blocks. To avoid this problem, compute an ordering of the nodes where each
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// node is only legalized after all of its operands are legalized.
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std::map<SDNode*, unsigned> Visited;
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std::vector<SDNode*> Order;
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// Compute ordering from all of the leaves in the graphs, those (like the
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// entry node) that have no operands.
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for (SelectionDAG::allnodes_iterator I = DAG.allnodes_begin(),
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E = DAG.allnodes_end(); I != E; ++I) {
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if (I->getNumOperands() == 0) {
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Visited[I] = 0 - 1U;
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ComputeTopDownOrdering(I, Order, Visited);
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}
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}
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assert(Order.size() == Visited.size() &&
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Order.size() ==
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(unsigned)std::distance(DAG.allnodes_begin(), DAG.allnodes_end()) &&
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"Error: DAG is cyclic!");
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Visited.clear();
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for (unsigned i = 0, e = Order.size(); i != e; ++i)
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HandleOp(SDOperand(Order[i], 0));
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// Finally, it's possible the root changed. Get the new root.
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SDOperand OldRoot = DAG.getRoot();
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assert(LegalizedNodes.count(OldRoot) && "Root didn't get legalized?");
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DAG.setRoot(LegalizedNodes[OldRoot]);
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ExpandedNodes.clear();
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LegalizedNodes.clear();
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PromotedNodes.clear();
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SplitNodes.clear();
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PackedNodes.clear();
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// Remove dead nodes now.
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DAG.RemoveDeadNodes(OldRoot.Val);
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}
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/// FindCallEndFromCallStart - Given a chained node that is part of a call
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/// sequence, find the CALLSEQ_END node that terminates the call sequence.
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static SDNode *FindCallEndFromCallStart(SDNode *Node) {
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if (Node->getOpcode() == ISD::CALLSEQ_END)
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return Node;
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if (Node->use_empty())
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return 0; // No CallSeqEnd
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// The chain is usually at the end.
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SDOperand TheChain(Node, Node->getNumValues()-1);
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if (TheChain.getValueType() != MVT::Other) {
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// Sometimes it's at the beginning.
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TheChain = SDOperand(Node, 0);
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if (TheChain.getValueType() != MVT::Other) {
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// Otherwise, hunt for it.
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for (unsigned i = 1, e = Node->getNumValues(); i != e; ++i)
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if (Node->getValueType(i) == MVT::Other) {
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TheChain = SDOperand(Node, i);
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break;
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}
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// Otherwise, we walked into a node without a chain.
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if (TheChain.getValueType() != MVT::Other)
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return 0;
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}
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}
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for (SDNode::use_iterator UI = Node->use_begin(),
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E = Node->use_end(); UI != E; ++UI) {
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// Make sure to only follow users of our token chain.
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SDNode *User = *UI;
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for (unsigned i = 0, e = User->getNumOperands(); i != e; ++i)
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if (User->getOperand(i) == TheChain)
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if (SDNode *Result = FindCallEndFromCallStart(User))
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return Result;
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}
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return 0;
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}
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/// FindCallStartFromCallEnd - Given a chained node that is part of a call
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/// sequence, find the CALLSEQ_START node that initiates the call sequence.
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static SDNode *FindCallStartFromCallEnd(SDNode *Node) {
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assert(Node && "Didn't find callseq_start for a call??");
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if (Node->getOpcode() == ISD::CALLSEQ_START) return Node;
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assert(Node->getOperand(0).getValueType() == MVT::Other &&
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"Node doesn't have a token chain argument!");
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return FindCallStartFromCallEnd(Node->getOperand(0).Val);
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}
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/// LegalizeAllNodesNotLeadingTo - Recursively walk the uses of N, looking to
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/// see if any uses can reach Dest. If no dest operands can get to dest,
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/// legalize them, legalize ourself, and return false, otherwise, return true.
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bool SelectionDAGLegalize::LegalizeAllNodesNotLeadingTo(SDNode *N,
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SDNode *Dest) {
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if (N == Dest) return true; // N certainly leads to Dest :)
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// If the first result of this node has been already legalized, then it cannot
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// reach N.
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switch (getTypeAction(N->getValueType(0))) {
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case Legal:
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if (LegalizedNodes.count(SDOperand(N, 0))) return false;
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break;
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case Promote:
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if (PromotedNodes.count(SDOperand(N, 0))) return false;
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break;
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case Expand:
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if (ExpandedNodes.count(SDOperand(N, 0))) return false;
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break;
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}
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// Okay, this node has not already been legalized. Check and legalize all
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// operands. If none lead to Dest, then we can legalize this node.
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bool OperandsLeadToDest = false;
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for (unsigned i = 0, e = N->getNumOperands(); i != e; ++i)
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OperandsLeadToDest |= // If an operand leads to Dest, so do we.
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LegalizeAllNodesNotLeadingTo(N->getOperand(i).Val, Dest);
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if (OperandsLeadToDest) return true;
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// Okay, this node looks safe, legalize it and return false.
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switch (getTypeAction(N->getValueType(0))) {
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case Legal:
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LegalizeOp(SDOperand(N, 0));
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break;
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case Promote:
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PromoteOp(SDOperand(N, 0));
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break;
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case Expand: {
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SDOperand X, Y;
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ExpandOp(SDOperand(N, 0), X, Y);
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break;
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}
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}
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return false;
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}
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/// HandleOp - Legalize, Promote, Expand or Pack the specified operand as
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/// appropriate for its type.
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void SelectionDAGLegalize::HandleOp(SDOperand Op) {
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switch (getTypeAction(Op.getValueType())) {
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default: assert(0 && "Bad type action!");
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case Legal: LegalizeOp(Op); break;
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case Promote: PromoteOp(Op); break;
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case Expand:
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if (Op.getValueType() != MVT::Vector) {
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SDOperand X, Y;
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ExpandOp(Op, X, Y);
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} else {
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SDNode *N = Op.Val;
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unsigned NumOps = N->getNumOperands();
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unsigned NumElements =
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cast<ConstantSDNode>(N->getOperand(NumOps-2))->getValue();
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MVT::ValueType EVT = cast<VTSDNode>(N->getOperand(NumOps-1))->getVT();
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MVT::ValueType PackedVT = getVectorType(EVT, NumElements);
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if (PackedVT != MVT::Other && TLI.isTypeLegal(PackedVT)) {
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// In the common case, this is a legal vector type, convert it to the
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// packed operation and type now.
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PackVectorOp(Op, PackedVT);
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} else if (NumElements == 1) {
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// Otherwise, if this is a single element vector, convert it to a
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// scalar operation.
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PackVectorOp(Op, EVT);
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} else {
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// Otherwise, this is a multiple element vector that isn't supported.
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// Split it in half and legalize both parts.
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SDOperand X, Y;
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SplitVectorOp(Op, X, Y);
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}
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}
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break;
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}
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}
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/// LegalizeOp - We know that the specified value has a legal type.
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/// Recursively ensure that the operands have legal types, then return the
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/// result.
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SDOperand SelectionDAGLegalize::LegalizeOp(SDOperand Op) {
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assert(isTypeLegal(Op.getValueType()) &&
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"Caller should expand or promote operands that are not legal!");
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SDNode *Node = Op.Val;
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// If this operation defines any values that cannot be represented in a
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// register on this target, make sure to expand or promote them.
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if (Node->getNumValues() > 1) {
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for (unsigned i = 0, e = Node->getNumValues(); i != e; ++i)
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if (getTypeAction(Node->getValueType(i)) != Legal) {
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HandleOp(Op.getValue(i));
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assert(LegalizedNodes.count(Op) &&
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"Handling didn't add legal operands!");
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return LegalizedNodes[Op];
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}
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}
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// Note that LegalizeOp may be reentered even from single-use nodes, which
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// means that we always must cache transformed nodes.
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std::map<SDOperand, SDOperand>::iterator I = LegalizedNodes.find(Op);
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if (I != LegalizedNodes.end()) return I->second;
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|
|
SDOperand Tmp1, Tmp2, Tmp3, Tmp4;
|
|
SDOperand Result = Op;
|
|
bool isCustom = false;
|
|
|
|
switch (Node->getOpcode()) {
|
|
case ISD::FrameIndex:
|
|
case ISD::EntryToken:
|
|
case ISD::Register:
|
|
case ISD::BasicBlock:
|
|
case ISD::TargetFrameIndex:
|
|
case ISD::TargetConstant:
|
|
case ISD::TargetConstantFP:
|
|
case ISD::TargetConstantPool:
|
|
case ISD::TargetGlobalAddress:
|
|
case ISD::TargetExternalSymbol:
|
|
case ISD::VALUETYPE:
|
|
case ISD::SRCVALUE:
|
|
case ISD::STRING:
|
|
case ISD::CONDCODE:
|
|
// Primitives must all be legal.
|
|
assert(TLI.isOperationLegal(Node->getValueType(0), Node->getValueType(0)) &&
|
|
"This must be legal!");
|
|
break;
|
|
default:
|
|
if (Node->getOpcode() >= ISD::BUILTIN_OP_END) {
|
|
// If this is a target node, legalize it by legalizing the operands then
|
|
// passing it through.
|
|
std::vector<SDOperand> Ops;
|
|
bool Changed = false;
|
|
for (unsigned i = 0, e = Node->getNumOperands(); i != e; ++i) {
|
|
Ops.push_back(LegalizeOp(Node->getOperand(i)));
|
|
Changed = Changed || Node->getOperand(i) != Ops.back();
|
|
}
|
|
if (Changed)
|
|
if (Node->getNumValues() == 1)
|
|
Result = DAG.getNode(Node->getOpcode(), Node->getValueType(0), Ops);
|
|
else {
|
|
std::vector<MVT::ValueType> VTs(Node->value_begin(),
|
|
Node->value_end());
|
|
Result = DAG.getNode(Node->getOpcode(), VTs, Ops);
|
|
}
|
|
|
|
for (unsigned i = 0, e = Node->getNumValues(); i != e; ++i)
|
|
AddLegalizedOperand(Op.getValue(i), Result.getValue(i));
|
|
return Result.getValue(Op.ResNo);
|
|
}
|
|
// Otherwise this is an unhandled builtin node. splat.
|
|
std::cerr << "NODE: "; Node->dump(); std::cerr << "\n";
|
|
assert(0 && "Do not know how to legalize this operator!");
|
|
abort();
|
|
case ISD::GlobalAddress:
|
|
case ISD::ExternalSymbol:
|
|
case ISD::ConstantPool: // Nothing to do.
|
|
switch (TLI.getOperationAction(Node->getOpcode(), Node->getValueType(0))) {
|
|
default: assert(0 && "This action is not supported yet!");
|
|
case TargetLowering::Custom:
|
|
Tmp1 = TLI.LowerOperation(Op, DAG);
|
|
if (Tmp1.Val) Result = Tmp1;
|
|
// FALLTHROUGH if the target doesn't want to lower this op after all.
|
|
case TargetLowering::Legal:
|
|
break;
|
|
}
|
|
break;
|
|
case ISD::AssertSext:
|
|
case ISD::AssertZext:
|
|
Tmp1 = LegalizeOp(Node->getOperand(0));
|
|
Result = DAG.UpdateNodeOperands(Result, Tmp1, Node->getOperand(1));
|
|
break;
|
|
case ISD::MERGE_VALUES:
|
|
// Legalize eliminates MERGE_VALUES nodes.
|
|
Result = Node->getOperand(Op.ResNo);
|
|
break;
|
|
case ISD::CopyFromReg:
|
|
Tmp1 = LegalizeOp(Node->getOperand(0));
|
|
Result = Op.getValue(0);
|
|
if (Node->getNumValues() == 2) {
|
|
Result = DAG.UpdateNodeOperands(Result, Tmp1, Node->getOperand(1));
|
|
} else {
|
|
assert(Node->getNumValues() == 3 && "Invalid copyfromreg!");
|
|
if (Node->getNumOperands() == 3) {
|
|
Tmp2 = LegalizeOp(Node->getOperand(2));
|
|
Result = DAG.UpdateNodeOperands(Result, Tmp1, Node->getOperand(1),Tmp2);
|
|
} else {
|
|
Result = DAG.UpdateNodeOperands(Result, Tmp1, Node->getOperand(1));
|
|
}
|
|
AddLegalizedOperand(Op.getValue(2), Result.getValue(2));
|
|
}
|
|
// Since CopyFromReg produces two values, make sure to remember that we
|
|
// legalized both of them.
|
|
AddLegalizedOperand(Op.getValue(0), Result);
|
|
AddLegalizedOperand(Op.getValue(1), Result.getValue(1));
|
|
return Result.getValue(Op.ResNo);
|
|
case ISD::UNDEF: {
|
|
MVT::ValueType VT = Op.getValueType();
|
|
switch (TLI.getOperationAction(ISD::UNDEF, VT)) {
|
|
default: assert(0 && "This action is not supported yet!");
|
|
case TargetLowering::Expand:
|
|
if (MVT::isInteger(VT))
|
|
Result = DAG.getConstant(0, VT);
|
|
else if (MVT::isFloatingPoint(VT))
|
|
Result = DAG.getConstantFP(0, VT);
|
|
else
|
|
assert(0 && "Unknown value type!");
|
|
break;
|
|
case TargetLowering::Legal:
|
|
break;
|
|
}
|
|
break;
|
|
}
|
|
|
|
case ISD::INTRINSIC: {
|
|
std::vector<SDOperand> Ops;
|
|
for (unsigned i = 0, e = Node->getNumOperands(); i != e; ++i)
|
|
Ops.push_back(LegalizeOp(Node->getOperand(i)));
|
|
Result = DAG.UpdateNodeOperands(Result, Ops);
|
|
|
|
// Allow the target to custom lower its intrinsics if it wants to.
|
|
if (TLI.getOperationAction(ISD::INTRINSIC, MVT::Other) ==
|
|
TargetLowering::Custom) {
|
|
Tmp3 = TLI.LowerOperation(Result, DAG);
|
|
if (Tmp3.Val) Result = Tmp3;
|
|
}
|
|
break;
|
|
}
|
|
|
|
case ISD::LOCATION:
|
|
assert(Node->getNumOperands() == 5 && "Invalid LOCATION node!");
|
|
Tmp1 = LegalizeOp(Node->getOperand(0)); // Legalize the input chain.
|
|
|
|
switch (TLI.getOperationAction(ISD::LOCATION, MVT::Other)) {
|
|
case TargetLowering::Promote:
|
|
default: assert(0 && "This action is not supported yet!");
|
|
case TargetLowering::Expand: {
|
|
MachineDebugInfo *DebugInfo = DAG.getMachineDebugInfo();
|
|
bool useDEBUG_LOC = TLI.isOperationLegal(ISD::DEBUG_LOC, MVT::Other);
|
|
bool useDEBUG_LABEL = TLI.isOperationLegal(ISD::DEBUG_LABEL, MVT::Other);
|
|
|
|
if (DebugInfo && (useDEBUG_LOC || useDEBUG_LABEL)) {
|
|
const std::string &FName =
|
|
cast<StringSDNode>(Node->getOperand(3))->getValue();
|
|
const std::string &DirName =
|
|
cast<StringSDNode>(Node->getOperand(4))->getValue();
|
|
unsigned SrcFile = DebugInfo->RecordSource(DirName, FName);
|
|
|
|
std::vector<SDOperand> Ops;
|
|
Ops.push_back(Tmp1); // chain
|
|
SDOperand LineOp = Node->getOperand(1);
|
|
SDOperand ColOp = Node->getOperand(2);
|
|
|
|
if (useDEBUG_LOC) {
|
|
Ops.push_back(LineOp); // line #
|
|
Ops.push_back(ColOp); // col #
|
|
Ops.push_back(DAG.getConstant(SrcFile, MVT::i32)); // source file id
|
|
Result = DAG.getNode(ISD::DEBUG_LOC, MVT::Other, Ops);
|
|
} else {
|
|
unsigned Line = cast<ConstantSDNode>(LineOp)->getValue();
|
|
unsigned Col = cast<ConstantSDNode>(ColOp)->getValue();
|
|
unsigned ID = DebugInfo->RecordLabel(Line, Col, SrcFile);
|
|
Ops.push_back(DAG.getConstant(ID, MVT::i32));
|
|
Result = DAG.getNode(ISD::DEBUG_LABEL, MVT::Other, Ops);
|
|
}
|
|
} else {
|
|
Result = Tmp1; // chain
|
|
}
|
|
break;
|
|
}
|
|
case TargetLowering::Legal:
|
|
if (Tmp1 != Node->getOperand(0) ||
|
|
getTypeAction(Node->getOperand(1).getValueType()) == Promote) {
|
|
std::vector<SDOperand> Ops;
|
|
Ops.push_back(Tmp1);
|
|
if (getTypeAction(Node->getOperand(1).getValueType()) == Legal) {
|
|
Ops.push_back(Node->getOperand(1)); // line # must be legal.
|
|
Ops.push_back(Node->getOperand(2)); // col # must be legal.
|
|
} else {
|
|
// Otherwise promote them.
|
|
Ops.push_back(PromoteOp(Node->getOperand(1)));
|
|
Ops.push_back(PromoteOp(Node->getOperand(2)));
|
|
}
|
|
Ops.push_back(Node->getOperand(3)); // filename must be legal.
|
|
Ops.push_back(Node->getOperand(4)); // working dir # must be legal.
|
|
Result = DAG.UpdateNodeOperands(Result, Ops);
|
|
}
|
|
break;
|
|
}
|
|
break;
|
|
|
|
case ISD::DEBUG_LOC:
|
|
assert(Node->getNumOperands() == 4 && "Invalid DEBUG_LOC node!");
|
|
switch (TLI.getOperationAction(ISD::DEBUG_LOC, MVT::Other)) {
|
|
default: assert(0 && "This action is not supported yet!");
|
|
case TargetLowering::Legal:
|
|
Tmp1 = LegalizeOp(Node->getOperand(0)); // Legalize the chain.
|
|
Tmp2 = LegalizeOp(Node->getOperand(1)); // Legalize the line #.
|
|
Tmp3 = LegalizeOp(Node->getOperand(2)); // Legalize the col #.
|
|
Tmp4 = LegalizeOp(Node->getOperand(3)); // Legalize the source file id.
|
|
Result = DAG.UpdateNodeOperands(Result, Tmp1, Tmp2, Tmp3, Tmp4);
|
|
break;
|
|
}
|
|
break;
|
|
|
|
case ISD::DEBUG_LABEL:
|
|
assert(Node->getNumOperands() == 2 && "Invalid DEBUG_LABEL node!");
|
|
switch (TLI.getOperationAction(ISD::DEBUG_LABEL, MVT::Other)) {
|
|
default: assert(0 && "This action is not supported yet!");
|
|
case TargetLowering::Legal:
|
|
Tmp1 = LegalizeOp(Node->getOperand(0)); // Legalize the chain.
|
|
Tmp2 = LegalizeOp(Node->getOperand(1)); // Legalize the label id.
|
|
Result = DAG.UpdateNodeOperands(Result, Tmp1, Tmp2);
|
|
break;
|
|
}
|
|
break;
|
|
|
|
case ISD::Constant:
|
|
// We know we don't need to expand constants here, constants only have one
|
|
// value and we check that it is fine above.
|
|
|
|
// FIXME: Maybe we should handle things like targets that don't support full
|
|
// 32-bit immediates?
|
|
break;
|
|
case ISD::ConstantFP: {
|
|
// Spill FP immediates to the constant pool if the target cannot directly
|
|
// codegen them. Targets often have some immediate values that can be
|
|
// efficiently generated into an FP register without a load. We explicitly
|
|
// leave these constants as ConstantFP nodes for the target to deal with.
|
|
ConstantFPSDNode *CFP = cast<ConstantFPSDNode>(Node);
|
|
|
|
// Check to see if this FP immediate is already legal.
|
|
bool isLegal = false;
|
|
for (TargetLowering::legal_fpimm_iterator I = TLI.legal_fpimm_begin(),
|
|
E = TLI.legal_fpimm_end(); I != E; ++I)
|
|
if (CFP->isExactlyValue(*I)) {
|
|
isLegal = true;
|
|
break;
|
|
}
|
|
|
|
// If this is a legal constant, turn it into a TargetConstantFP node.
|
|
if (isLegal) {
|
|
Result = DAG.getTargetConstantFP(CFP->getValue(), CFP->getValueType(0));
|
|
break;
|
|
}
|
|
|
|
switch (TLI.getOperationAction(ISD::ConstantFP, CFP->getValueType(0))) {
|
|
default: assert(0 && "This action is not supported yet!");
|
|
case TargetLowering::Custom:
|
|
Tmp3 = TLI.LowerOperation(Result, DAG);
|
|
if (Tmp3.Val) {
|
|
Result = Tmp3;
|
|
break;
|
|
}
|
|
// FALLTHROUGH
|
|
case TargetLowering::Expand:
|
|
// Otherwise we need to spill the constant to memory.
|
|
bool Extend = false;
|
|
|
|
// If a FP immediate is precise when represented as a float and if the
|
|
// target can do an extending load from float to double, we put it into
|
|
// the constant pool as a float, even if it's is statically typed as a
|
|
// double.
|
|
MVT::ValueType VT = CFP->getValueType(0);
|
|
bool isDouble = VT == MVT::f64;
|
|
ConstantFP *LLVMC = ConstantFP::get(isDouble ? Type::DoubleTy :
|
|
Type::FloatTy, CFP->getValue());
|
|
if (isDouble && CFP->isExactlyValue((float)CFP->getValue()) &&
|
|
// Only do this if the target has a native EXTLOAD instruction from
|
|
// f32.
|
|
TLI.isOperationLegal(ISD::EXTLOAD, MVT::f32)) {
|
|
LLVMC = cast<ConstantFP>(ConstantExpr::getCast(LLVMC, Type::FloatTy));
|
|
VT = MVT::f32;
|
|
Extend = true;
|
|
}
|
|
|
|
SDOperand CPIdx = DAG.getConstantPool(LLVMC, TLI.getPointerTy());
|
|
if (Extend) {
|
|
Result = DAG.getExtLoad(ISD::EXTLOAD, MVT::f64, DAG.getEntryNode(),
|
|
CPIdx, DAG.getSrcValue(NULL), MVT::f32);
|
|
} else {
|
|
Result = DAG.getLoad(VT, DAG.getEntryNode(), CPIdx,
|
|
DAG.getSrcValue(NULL));
|
|
}
|
|
}
|
|
break;
|
|
}
|
|
case ISD::TokenFactor:
|
|
if (Node->getNumOperands() == 2) {
|
|
Tmp1 = LegalizeOp(Node->getOperand(0));
|
|
Tmp2 = LegalizeOp(Node->getOperand(1));
|
|
Result = DAG.UpdateNodeOperands(Result, Tmp1, Tmp2);
|
|
} else if (Node->getNumOperands() == 3) {
|
|
Tmp1 = LegalizeOp(Node->getOperand(0));
|
|
Tmp2 = LegalizeOp(Node->getOperand(1));
|
|
Tmp3 = LegalizeOp(Node->getOperand(2));
|
|
Result = DAG.UpdateNodeOperands(Result, Tmp1, Tmp2, Tmp3);
|
|
} else {
|
|
std::vector<SDOperand> Ops;
|
|
// Legalize the operands.
|
|
for (unsigned i = 0, e = Node->getNumOperands(); i != e; ++i)
|
|
Ops.push_back(LegalizeOp(Node->getOperand(i)));
|
|
Result = DAG.UpdateNodeOperands(Result, Ops);
|
|
}
|
|
break;
|
|
|
|
case ISD::BUILD_VECTOR:
|
|
switch (TLI.getOperationAction(ISD::BUILD_VECTOR, Node->getValueType(0))) {
|
|
default: assert(0 && "This action is not supported yet!");
|
|
case TargetLowering::Custom:
|
|
Tmp3 = TLI.LowerOperation(Result, DAG);
|
|
if (Tmp3.Val) {
|
|
Result = Tmp3;
|
|
break;
|
|
}
|
|
// FALLTHROUGH
|
|
case TargetLowering::Expand:
|
|
Result = ExpandBUILD_VECTOR(Result.Val);
|
|
break;
|
|
}
|
|
break;
|
|
case ISD::INSERT_VECTOR_ELT:
|
|
Tmp1 = LegalizeOp(Node->getOperand(0)); // InVec
|
|
Tmp2 = LegalizeOp(Node->getOperand(1)); // InVal
|
|
Tmp3 = LegalizeOp(Node->getOperand(2)); // InEltNo
|
|
Result = DAG.UpdateNodeOperands(Result, Tmp1, Tmp2, Tmp3);
|
|
|
|
switch (TLI.getOperationAction(ISD::INSERT_VECTOR_ELT,
|
|
Node->getValueType(0))) {
|
|
default: assert(0 && "This action is not supported yet!");
|
|
case TargetLowering::Legal:
|
|
break;
|
|
case TargetLowering::Custom:
|
|
Tmp3 = TLI.LowerOperation(Result, DAG);
|
|
if (Tmp3.Val) {
|
|
Result = Tmp3;
|
|
break;
|
|
}
|
|
// FALLTHROUGH
|
|
case TargetLowering::Expand: {
|
|
// If the target doesn't support this, we have to spill the input vector
|
|
// to a temporary stack slot, update the element, then reload it. This is
|
|
// badness. We could also load the value into a vector register (either
|
|
// with a "move to register" or "extload into register" instruction, then
|
|
// permute it into place, if the idx is a constant and if the idx is
|
|
// supported by the target.
|
|
assert(0 && "INSERT_VECTOR_ELT expand not supported yet!");
|
|
break;
|
|
}
|
|
}
|
|
break;
|
|
case ISD::SCALAR_TO_VECTOR:
|
|
Tmp1 = LegalizeOp(Node->getOperand(0)); // InVal
|
|
Result = DAG.UpdateNodeOperands(Result, Tmp1);
|
|
switch (TLI.getOperationAction(ISD::SCALAR_TO_VECTOR,
|
|
Node->getValueType(0))) {
|
|
default: assert(0 && "This action is not supported yet!");
|
|
case TargetLowering::Legal:
|
|
break;
|
|
case TargetLowering::Custom:
|
|
Tmp3 = TLI.LowerOperation(Result, DAG);
|
|
if (Tmp3.Val) {
|
|
Result = Tmp3;
|
|
break;
|
|
}
|
|
// FALLTHROUGH
|
|
case TargetLowering::Expand: {
|
|
// If the target doesn't support this, store the value to a temporary
|
|
// stack slot, then EXTLOAD the vector back out.
|
|
// TODO: If a target doesn't support this, create a stack slot for the
|
|
// whole vector, then store into it, then load the whole vector.
|
|
SDOperand StackPtr =
|
|
CreateStackTemporary(Node->getOperand(0).getValueType());
|
|
SDOperand Ch = DAG.getNode(ISD::STORE, MVT::Other, DAG.getEntryNode(),
|
|
Node->getOperand(0), StackPtr,
|
|
DAG.getSrcValue(NULL));
|
|
Result = DAG.getExtLoad(ISD::EXTLOAD, Node->getValueType(0), Ch, StackPtr,
|
|
DAG.getSrcValue(NULL),
|
|
Node->getOperand(0).getValueType());
|
|
break;
|
|
}
|
|
}
|
|
break;
|
|
case ISD::VECTOR_SHUFFLE:
|
|
assert(TLI.isShuffleLegal(Result.getValueType(), Node->getOperand(2)) &&
|
|
"vector shuffle should not be created if not legal!");
|
|
Tmp1 = LegalizeOp(Node->getOperand(0)); // Legalize the input vectors,
|
|
Tmp2 = LegalizeOp(Node->getOperand(1)); // but not the shuffle mask.
|
|
Result = DAG.UpdateNodeOperands(Result, Tmp1, Tmp2, Node->getOperand(2));
|
|
|
|
// Allow targets to custom lower the SHUFFLEs they support.
|
|
if (TLI.getOperationAction(ISD::VECTOR_SHUFFLE, Result.getValueType())
|
|
== TargetLowering::Custom) {
|
|
Tmp1 = TLI.LowerOperation(Result, DAG);
|
|
if (Tmp1.Val) Result = Tmp1;
|
|
}
|
|
break;
|
|
|
|
case ISD::EXTRACT_VECTOR_ELT:
|
|
Tmp1 = LegalizeOp(Node->getOperand(0));
|
|
Tmp2 = LegalizeOp(Node->getOperand(1));
|
|
Result = DAG.UpdateNodeOperands(Result, Tmp1, Tmp2);
|
|
|
|
switch (TLI.getOperationAction(ISD::EXTRACT_VECTOR_ELT,
|
|
Tmp1.getValueType())) {
|
|
default: assert(0 && "This action is not supported yet!");
|
|
case TargetLowering::Legal:
|
|
break;
|
|
case TargetLowering::Custom:
|
|
Tmp3 = TLI.LowerOperation(Result, DAG);
|
|
if (Tmp3.Val) {
|
|
Result = Tmp3;
|
|
break;
|
|
}
|
|
// FALLTHROUGH
|
|
case TargetLowering::Expand: {
|
|
// If the target doesn't support this, store the value to a temporary
|
|
// stack slot, then LOAD the scalar element back out.
|
|
SDOperand StackPtr = CreateStackTemporary(Tmp1.getValueType());
|
|
SDOperand Ch = DAG.getNode(ISD::STORE, MVT::Other, DAG.getEntryNode(),
|
|
Tmp1, StackPtr, DAG.getSrcValue(NULL));
|
|
|
|
// Add the offset to the index.
|
|
unsigned EltSize = MVT::getSizeInBits(Result.getValueType())/8;
|
|
Tmp2 = DAG.getNode(ISD::MUL, Tmp2.getValueType(), Tmp2,
|
|
DAG.getConstant(EltSize, Tmp2.getValueType()));
|
|
StackPtr = DAG.getNode(ISD::ADD, Tmp2.getValueType(), Tmp2, StackPtr);
|
|
|
|
Result = DAG.getLoad(Result.getValueType(), Ch, StackPtr,
|
|
DAG.getSrcValue(NULL));
|
|
break;
|
|
}
|
|
}
|
|
break;
|
|
|
|
case ISD::VEXTRACT_VECTOR_ELT: {
|
|
// We know that operand #0 is the Vec vector. If the index is a constant
|
|
// or if the invec is a supported hardware type, we can use it. Otherwise,
|
|
// lower to a store then an indexed load.
|
|
Tmp1 = Node->getOperand(0);
|
|
Tmp2 = LegalizeOp(Node->getOperand(1));
|
|
|
|
SDNode *InVal = Tmp1.Val;
|
|
unsigned NumElems = cast<ConstantSDNode>(*(InVal->op_end()-2))->getValue();
|
|
MVT::ValueType EVT = cast<VTSDNode>(*(InVal->op_end()-1))->getVT();
|
|
|
|
// Figure out if there is a Packed type corresponding to this Vector
|
|
// type. If so, convert to the packed type.
|
|
MVT::ValueType TVT = MVT::getVectorType(EVT, NumElems);
|
|
if (TVT != MVT::Other && TLI.isTypeLegal(TVT)) {
|
|
// Turn this into a packed extract_vector_elt operation.
|
|
Tmp1 = PackVectorOp(Tmp1, TVT);
|
|
Result = DAG.getNode(ISD::EXTRACT_VECTOR_ELT, Node->getValueType(0),
|
|
Tmp1, Tmp2);
|
|
break;
|
|
} else if (NumElems == 1) {
|
|
// This must be an access of the only element.
|
|
Result = PackVectorOp(Tmp1, EVT);
|
|
break;
|
|
} else if (ConstantSDNode *CIdx = dyn_cast<ConstantSDNode>(Tmp2)) {
|
|
SDOperand Lo, Hi;
|
|
SplitVectorOp(Tmp1, Lo, Hi);
|
|
if (CIdx->getValue() < NumElems/2) {
|
|
Tmp1 = Lo;
|
|
} else {
|
|
Tmp1 = Hi;
|
|
Tmp2 = DAG.getConstant(CIdx->getValue() - NumElems/2,
|
|
Tmp2.getValueType());
|
|
}
|
|
|
|
// It's now an extract from the appropriate high or low part.
|
|
Result = LegalizeOp(DAG.UpdateNodeOperands(Result, Tmp1, Tmp2));
|
|
} else {
|
|
// FIXME: IMPLEMENT STORE/LOAD lowering. Need alignment of stack slot!!
|
|
assert(0 && "unimp!");
|
|
}
|
|
break;
|
|
}
|
|
|
|
case ISD::CALLSEQ_START: {
|
|
SDNode *CallEnd = FindCallEndFromCallStart(Node);
|
|
|
|
// Recursively Legalize all of the inputs of the call end that do not lead
|
|
// to this call start. This ensures that any libcalls that need be inserted
|
|
// are inserted *before* the CALLSEQ_START.
|
|
for (unsigned i = 0, e = CallEnd->getNumOperands(); i != e; ++i)
|
|
LegalizeAllNodesNotLeadingTo(CallEnd->getOperand(i).Val, Node);
|
|
|
|
// Now that we legalized all of the inputs (which may have inserted
|
|
// libcalls) create the new CALLSEQ_START node.
|
|
Tmp1 = LegalizeOp(Node->getOperand(0)); // Legalize the chain.
|
|
|
|
// Merge in the last call, to ensure that this call start after the last
|
|
// call ended.
|
|
Tmp1 = DAG.getNode(ISD::TokenFactor, MVT::Other, Tmp1, LastCALLSEQ_END);
|
|
Tmp1 = LegalizeOp(Tmp1);
|
|
|
|
// Do not try to legalize the target-specific arguments (#1+).
|
|
if (Tmp1 != Node->getOperand(0)) {
|
|
std::vector<SDOperand> Ops(Node->op_begin(), Node->op_end());
|
|
Ops[0] = Tmp1;
|
|
Result = DAG.UpdateNodeOperands(Result, Ops);
|
|
}
|
|
|
|
// Remember that the CALLSEQ_START is legalized.
|
|
AddLegalizedOperand(Op.getValue(0), Result);
|
|
if (Node->getNumValues() == 2) // If this has a flag result, remember it.
|
|
AddLegalizedOperand(Op.getValue(1), Result.getValue(1));
|
|
|
|
// Now that the callseq_start and all of the non-call nodes above this call
|
|
// sequence have been legalized, legalize the call itself. During this
|
|
// process, no libcalls can/will be inserted, guaranteeing that no calls
|
|
// can overlap.
|
|
assert(!IsLegalizingCall && "Inconsistent sequentialization of calls!");
|
|
SDOperand InCallSEQ = LastCALLSEQ_END;
|
|
// Note that we are selecting this call!
|
|
LastCALLSEQ_END = SDOperand(CallEnd, 0);
|
|
IsLegalizingCall = true;
|
|
|
|
// Legalize the call, starting from the CALLSEQ_END.
|
|
LegalizeOp(LastCALLSEQ_END);
|
|
assert(!IsLegalizingCall && "CALLSEQ_END should have cleared this!");
|
|
return Result;
|
|
}
|
|
case ISD::CALLSEQ_END:
|
|
// If the CALLSEQ_START node hasn't been legalized first, legalize it. This
|
|
// will cause this node to be legalized as well as handling libcalls right.
|
|
if (LastCALLSEQ_END.Val != Node) {
|
|
LegalizeOp(SDOperand(FindCallStartFromCallEnd(Node), 0));
|
|
std::map<SDOperand, SDOperand>::iterator I = LegalizedNodes.find(Op);
|
|
assert(I != LegalizedNodes.end() &&
|
|
"Legalizing the call start should have legalized this node!");
|
|
return I->second;
|
|
}
|
|
|
|
// Otherwise, the call start has been legalized and everything is going
|
|
// according to plan. Just legalize ourselves normally here.
|
|
Tmp1 = LegalizeOp(Node->getOperand(0)); // Legalize the chain.
|
|
// Do not try to legalize the target-specific arguments (#1+), except for
|
|
// an optional flag input.
|
|
if (Node->getOperand(Node->getNumOperands()-1).getValueType() != MVT::Flag){
|
|
if (Tmp1 != Node->getOperand(0)) {
|
|
std::vector<SDOperand> Ops(Node->op_begin(), Node->op_end());
|
|
Ops[0] = Tmp1;
|
|
Result = DAG.UpdateNodeOperands(Result, Ops);
|
|
}
|
|
} else {
|
|
Tmp2 = LegalizeOp(Node->getOperand(Node->getNumOperands()-1));
|
|
if (Tmp1 != Node->getOperand(0) ||
|
|
Tmp2 != Node->getOperand(Node->getNumOperands()-1)) {
|
|
std::vector<SDOperand> Ops(Node->op_begin(), Node->op_end());
|
|
Ops[0] = Tmp1;
|
|
Ops.back() = Tmp2;
|
|
Result = DAG.UpdateNodeOperands(Result, Ops);
|
|
}
|
|
}
|
|
assert(IsLegalizingCall && "Call sequence imbalance between start/end?");
|
|
// This finishes up call legalization.
|
|
IsLegalizingCall = false;
|
|
|
|
// If the CALLSEQ_END node has a flag, remember that we legalized it.
|
|
AddLegalizedOperand(SDOperand(Node, 0), Result.getValue(0));
|
|
if (Node->getNumValues() == 2)
|
|
AddLegalizedOperand(SDOperand(Node, 1), Result.getValue(1));
|
|
return Result.getValue(Op.ResNo);
|
|
case ISD::DYNAMIC_STACKALLOC: {
|
|
Tmp1 = LegalizeOp(Node->getOperand(0)); // Legalize the chain.
|
|
Tmp2 = LegalizeOp(Node->getOperand(1)); // Legalize the size.
|
|
Tmp3 = LegalizeOp(Node->getOperand(2)); // Legalize the alignment.
|
|
Result = DAG.UpdateNodeOperands(Result, Tmp1, Tmp2, Tmp3);
|
|
|
|
Tmp1 = Result.getValue(0);
|
|
Tmp2 = Result.getValue(1);
|
|
switch (TLI.getOperationAction(Node->getOpcode(),
|
|
Node->getValueType(0))) {
|
|
default: assert(0 && "This action is not supported yet!");
|
|
case TargetLowering::Expand: {
|
|
unsigned SPReg = TLI.getStackPointerRegisterToSaveRestore();
|
|
assert(SPReg && "Target cannot require DYNAMIC_STACKALLOC expansion and"
|
|
" not tell us which reg is the stack pointer!");
|
|
SDOperand Chain = Tmp1.getOperand(0);
|
|
SDOperand Size = Tmp2.getOperand(1);
|
|
SDOperand SP = DAG.getCopyFromReg(Chain, SPReg, Node->getValueType(0));
|
|
Tmp1 = DAG.getNode(ISD::SUB, Node->getValueType(0), SP, Size); // Value
|
|
Tmp2 = DAG.getCopyToReg(SP.getValue(1), SPReg, Tmp1); // Output chain
|
|
Tmp1 = LegalizeOp(Tmp1);
|
|
Tmp2 = LegalizeOp(Tmp2);
|
|
break;
|
|
}
|
|
case TargetLowering::Custom:
|
|
Tmp3 = TLI.LowerOperation(Tmp1, DAG);
|
|
if (Tmp3.Val) {
|
|
Tmp1 = LegalizeOp(Tmp3);
|
|
Tmp2 = LegalizeOp(Tmp3.getValue(1));
|
|
}
|
|
break;
|
|
case TargetLowering::Legal:
|
|
break;
|
|
}
|
|
// Since this op produce two values, make sure to remember that we
|
|
// legalized both of them.
|
|
AddLegalizedOperand(SDOperand(Node, 0), Tmp1);
|
|
AddLegalizedOperand(SDOperand(Node, 1), Tmp2);
|
|
return Op.ResNo ? Tmp2 : Tmp1;
|
|
}
|
|
case ISD::INLINEASM:
|
|
Tmp1 = LegalizeOp(Node->getOperand(0)); // Legalize Chain.
|
|
Tmp2 = Node->getOperand(Node->getNumOperands()-1);
|
|
if (Tmp2.getValueType() == MVT::Flag) // Legalize Flag if it exists.
|
|
Tmp2 = Tmp3 = SDOperand(0, 0);
|
|
else
|
|
Tmp3 = LegalizeOp(Tmp2);
|
|
|
|
if (Tmp1 != Node->getOperand(0) || Tmp2 != Tmp3) {
|
|
std::vector<SDOperand> Ops(Node->op_begin(), Node->op_end());
|
|
Ops[0] = Tmp1;
|
|
if (Tmp3.Val) Ops.back() = Tmp3;
|
|
Result = DAG.UpdateNodeOperands(Result, Ops);
|
|
}
|
|
|
|
// INLINE asm returns a chain and flag, make sure to add both to the map.
|
|
AddLegalizedOperand(SDOperand(Node, 0), Result.getValue(0));
|
|
AddLegalizedOperand(SDOperand(Node, 1), Result.getValue(1));
|
|
return Result.getValue(Op.ResNo);
|
|
case ISD::BR:
|
|
Tmp1 = LegalizeOp(Node->getOperand(0)); // Legalize the chain.
|
|
// Ensure that libcalls are emitted before a branch.
|
|
Tmp1 = DAG.getNode(ISD::TokenFactor, MVT::Other, Tmp1, LastCALLSEQ_END);
|
|
Tmp1 = LegalizeOp(Tmp1);
|
|
LastCALLSEQ_END = DAG.getEntryNode();
|
|
|
|
Result = DAG.UpdateNodeOperands(Result, Tmp1, Node->getOperand(1));
|
|
break;
|
|
|
|
case ISD::BRCOND:
|
|
Tmp1 = LegalizeOp(Node->getOperand(0)); // Legalize the chain.
|
|
// Ensure that libcalls are emitted before a return.
|
|
Tmp1 = DAG.getNode(ISD::TokenFactor, MVT::Other, Tmp1, LastCALLSEQ_END);
|
|
Tmp1 = LegalizeOp(Tmp1);
|
|
LastCALLSEQ_END = DAG.getEntryNode();
|
|
|
|
switch (getTypeAction(Node->getOperand(1).getValueType())) {
|
|
case Expand: assert(0 && "It's impossible to expand bools");
|
|
case Legal:
|
|
Tmp2 = LegalizeOp(Node->getOperand(1)); // Legalize the condition.
|
|
break;
|
|
case Promote:
|
|
Tmp2 = PromoteOp(Node->getOperand(1)); // Promote the condition.
|
|
break;
|
|
}
|
|
|
|
// Basic block destination (Op#2) is always legal.
|
|
Result = DAG.UpdateNodeOperands(Result, Tmp1, Tmp2, Node->getOperand(2));
|
|
|
|
switch (TLI.getOperationAction(ISD::BRCOND, MVT::Other)) {
|
|
default: assert(0 && "This action is not supported yet!");
|
|
case TargetLowering::Legal: break;
|
|
case TargetLowering::Custom:
|
|
Tmp1 = TLI.LowerOperation(Result, DAG);
|
|
if (Tmp1.Val) Result = Tmp1;
|
|
break;
|
|
case TargetLowering::Expand:
|
|
// Expand brcond's setcc into its constituent parts and create a BR_CC
|
|
// Node.
|
|
if (Tmp2.getOpcode() == ISD::SETCC) {
|
|
Result = DAG.getNode(ISD::BR_CC, MVT::Other, Tmp1, Tmp2.getOperand(2),
|
|
Tmp2.getOperand(0), Tmp2.getOperand(1),
|
|
Node->getOperand(2));
|
|
} else {
|
|
// Make sure the condition is either zero or one. It may have been
|
|
// promoted from something else.
|
|
unsigned NumBits = MVT::getSizeInBits(Tmp2.getValueType());
|
|
if (!TLI.MaskedValueIsZero(Tmp2, (~0ULL >> (64-NumBits))^1))
|
|
Tmp2 = DAG.getZeroExtendInReg(Tmp2, MVT::i1);
|
|
|
|
Result = DAG.getNode(ISD::BR_CC, MVT::Other, Tmp1,
|
|
DAG.getCondCode(ISD::SETNE), Tmp2,
|
|
DAG.getConstant(0, Tmp2.getValueType()),
|
|
Node->getOperand(2));
|
|
}
|
|
break;
|
|
}
|
|
break;
|
|
case ISD::BR_CC:
|
|
Tmp1 = LegalizeOp(Node->getOperand(0)); // Legalize the chain.
|
|
// Ensure that libcalls are emitted before a branch.
|
|
Tmp1 = DAG.getNode(ISD::TokenFactor, MVT::Other, Tmp1, LastCALLSEQ_END);
|
|
Tmp1 = LegalizeOp(Tmp1);
|
|
LastCALLSEQ_END = DAG.getEntryNode();
|
|
|
|
Tmp2 = Node->getOperand(2); // LHS
|
|
Tmp3 = Node->getOperand(3); // RHS
|
|
Tmp4 = Node->getOperand(1); // CC
|
|
|
|
LegalizeSetCCOperands(Tmp2, Tmp3, Tmp4);
|
|
|
|
// If we didn't get both a LHS and RHS back from LegalizeSetCCOperands,
|
|
// the LHS is a legal SETCC itself. In this case, we need to compare
|
|
// the result against zero to select between true and false values.
|
|
if (Tmp3.Val == 0) {
|
|
Tmp3 = DAG.getConstant(0, Tmp2.getValueType());
|
|
Tmp4 = DAG.getCondCode(ISD::SETNE);
|
|
}
|
|
|
|
Result = DAG.UpdateNodeOperands(Result, Tmp1, Tmp4, Tmp2, Tmp3,
|
|
Node->getOperand(4));
|
|
|
|
switch (TLI.getOperationAction(ISD::BR_CC, Tmp3.getValueType())) {
|
|
default: assert(0 && "Unexpected action for BR_CC!");
|
|
case TargetLowering::Legal: break;
|
|
case TargetLowering::Custom:
|
|
Tmp4 = TLI.LowerOperation(Result, DAG);
|
|
if (Tmp4.Val) Result = Tmp4;
|
|
break;
|
|
}
|
|
break;
|
|
case ISD::LOAD: {
|
|
Tmp1 = LegalizeOp(Node->getOperand(0)); // Legalize the chain.
|
|
Tmp2 = LegalizeOp(Node->getOperand(1)); // Legalize the pointer.
|
|
|
|
MVT::ValueType VT = Node->getValueType(0);
|
|
Result = DAG.UpdateNodeOperands(Result, Tmp1, Tmp2, Node->getOperand(2));
|
|
Tmp2 = Result.getValue(0);
|
|
Tmp3 = Result.getValue(1);
|
|
|
|
switch (TLI.getOperationAction(Node->getOpcode(), VT)) {
|
|
default: assert(0 && "This action is not supported yet!");
|
|
case TargetLowering::Legal: break;
|
|
case TargetLowering::Custom:
|
|
Tmp1 = TLI.LowerOperation(Tmp2, DAG);
|
|
if (Tmp1.Val) {
|
|
Tmp2 = LegalizeOp(Tmp1);
|
|
Tmp3 = LegalizeOp(Tmp1.getValue(1));
|
|
}
|
|
break;
|
|
}
|
|
// Since loads produce two values, make sure to remember that we
|
|
// legalized both of them.
|
|
AddLegalizedOperand(SDOperand(Node, 0), Tmp2);
|
|
AddLegalizedOperand(SDOperand(Node, 1), Tmp3);
|
|
return Op.ResNo ? Tmp3 : Tmp2;
|
|
}
|
|
case ISD::EXTLOAD:
|
|
case ISD::SEXTLOAD:
|
|
case ISD::ZEXTLOAD: {
|
|
Tmp1 = LegalizeOp(Node->getOperand(0)); // Legalize the chain.
|
|
Tmp2 = LegalizeOp(Node->getOperand(1)); // Legalize the pointer.
|
|
|
|
MVT::ValueType SrcVT = cast<VTSDNode>(Node->getOperand(3))->getVT();
|
|
switch (TLI.getOperationAction(Node->getOpcode(), SrcVT)) {
|
|
default: assert(0 && "This action is not supported yet!");
|
|
case TargetLowering::Promote:
|
|
assert(SrcVT == MVT::i1 && "Can only promote EXTLOAD from i1 -> i8!");
|
|
Result = DAG.UpdateNodeOperands(Result, Tmp1, Tmp2, Node->getOperand(2),
|
|
DAG.getValueType(MVT::i8));
|
|
Tmp1 = Result.getValue(0);
|
|
Tmp2 = Result.getValue(1);
|
|
break;
|
|
case TargetLowering::Custom:
|
|
isCustom = true;
|
|
// FALLTHROUGH
|
|
case TargetLowering::Legal:
|
|
Result = DAG.UpdateNodeOperands(Result, Tmp1, Tmp2, Node->getOperand(2),
|
|
Node->getOperand(3));
|
|
Tmp1 = Result.getValue(0);
|
|
Tmp2 = Result.getValue(1);
|
|
|
|
if (isCustom) {
|
|
Tmp3 = TLI.LowerOperation(Tmp3, DAG);
|
|
if (Tmp3.Val) {
|
|
Tmp1 = LegalizeOp(Tmp3);
|
|
Tmp2 = LegalizeOp(Tmp3.getValue(1));
|
|
}
|
|
}
|
|
break;
|
|
case TargetLowering::Expand:
|
|
// f64 = EXTLOAD f32 should expand to LOAD, FP_EXTEND
|
|
if (SrcVT == MVT::f32 && Node->getValueType(0) == MVT::f64) {
|
|
SDOperand Load = DAG.getLoad(SrcVT, Tmp1, Tmp2, Node->getOperand(2));
|
|
Result = DAG.getNode(ISD::FP_EXTEND, Node->getValueType(0), Load);
|
|
Tmp1 = LegalizeOp(Result); // Relegalize new nodes.
|
|
Tmp2 = LegalizeOp(Load.getValue(1));
|
|
break;
|
|
}
|
|
assert(Node->getOpcode() != ISD::EXTLOAD &&
|
|
"EXTLOAD should always be supported!");
|
|
// Turn the unsupported load into an EXTLOAD followed by an explicit
|
|
// zero/sign extend inreg.
|
|
Result = DAG.getExtLoad(ISD::EXTLOAD, Node->getValueType(0),
|
|
Tmp1, Tmp2, Node->getOperand(2), SrcVT);
|
|
SDOperand ValRes;
|
|
if (Node->getOpcode() == ISD::SEXTLOAD)
|
|
ValRes = DAG.getNode(ISD::SIGN_EXTEND_INREG, Result.getValueType(),
|
|
Result, DAG.getValueType(SrcVT));
|
|
else
|
|
ValRes = DAG.getZeroExtendInReg(Result, SrcVT);
|
|
Tmp1 = LegalizeOp(ValRes); // Relegalize new nodes.
|
|
Tmp2 = LegalizeOp(Result.getValue(1)); // Relegalize new nodes.
|
|
break;
|
|
}
|
|
// Since loads produce two values, make sure to remember that we legalized
|
|
// both of them.
|
|
AddLegalizedOperand(SDOperand(Node, 0), Tmp1);
|
|
AddLegalizedOperand(SDOperand(Node, 1), Tmp2);
|
|
return Op.ResNo ? Tmp2 : Tmp1;
|
|
}
|
|
case ISD::EXTRACT_ELEMENT: {
|
|
MVT::ValueType OpTy = Node->getOperand(0).getValueType();
|
|
switch (getTypeAction(OpTy)) {
|
|
default: assert(0 && "EXTRACT_ELEMENT action for type unimplemented!");
|
|
case Legal:
|
|
if (cast<ConstantSDNode>(Node->getOperand(1))->getValue()) {
|
|
// 1 -> Hi
|
|
Result = DAG.getNode(ISD::SRL, OpTy, Node->getOperand(0),
|
|
DAG.getConstant(MVT::getSizeInBits(OpTy)/2,
|
|
TLI.getShiftAmountTy()));
|
|
Result = DAG.getNode(ISD::TRUNCATE, Node->getValueType(0), Result);
|
|
} else {
|
|
// 0 -> Lo
|
|
Result = DAG.getNode(ISD::TRUNCATE, Node->getValueType(0),
|
|
Node->getOperand(0));
|
|
}
|
|
break;
|
|
case Expand:
|
|
// Get both the low and high parts.
|
|
ExpandOp(Node->getOperand(0), Tmp1, Tmp2);
|
|
if (cast<ConstantSDNode>(Node->getOperand(1))->getValue())
|
|
Result = Tmp2; // 1 -> Hi
|
|
else
|
|
Result = Tmp1; // 0 -> Lo
|
|
break;
|
|
}
|
|
break;
|
|
}
|
|
|
|
case ISD::CopyToReg:
|
|
Tmp1 = LegalizeOp(Node->getOperand(0)); // Legalize the chain.
|
|
|
|
assert(isTypeLegal(Node->getOperand(2).getValueType()) &&
|
|
"Register type must be legal!");
|
|
// Legalize the incoming value (must be a legal type).
|
|
Tmp2 = LegalizeOp(Node->getOperand(2));
|
|
if (Node->getNumValues() == 1) {
|
|
Result = DAG.UpdateNodeOperands(Result, Tmp1, Node->getOperand(1), Tmp2);
|
|
} else {
|
|
assert(Node->getNumValues() == 2 && "Unknown CopyToReg");
|
|
if (Node->getNumOperands() == 4) {
|
|
Tmp3 = LegalizeOp(Node->getOperand(3));
|
|
Result = DAG.UpdateNodeOperands(Result, Tmp1, Node->getOperand(1), Tmp2,
|
|
Tmp3);
|
|
} else {
|
|
Result = DAG.UpdateNodeOperands(Result, Tmp1, Node->getOperand(1),Tmp2);
|
|
}
|
|
|
|
// Since this produces two values, make sure to remember that we legalized
|
|
// both of them.
|
|
AddLegalizedOperand(SDOperand(Node, 0), Result.getValue(0));
|
|
AddLegalizedOperand(SDOperand(Node, 1), Result.getValue(1));
|
|
return Result;
|
|
}
|
|
break;
|
|
|
|
case ISD::RET:
|
|
Tmp1 = LegalizeOp(Node->getOperand(0)); // Legalize the chain.
|
|
|
|
// Ensure that libcalls are emitted before a return.
|
|
Tmp1 = DAG.getNode(ISD::TokenFactor, MVT::Other, Tmp1, LastCALLSEQ_END);
|
|
Tmp1 = LegalizeOp(Tmp1);
|
|
LastCALLSEQ_END = DAG.getEntryNode();
|
|
|
|
switch (Node->getNumOperands()) {
|
|
case 2: // ret val
|
|
switch (getTypeAction(Node->getOperand(1).getValueType())) {
|
|
case Legal:
|
|
Tmp2 = LegalizeOp(Node->getOperand(1));
|
|
Result = DAG.UpdateNodeOperands(Result, Tmp1, Tmp2);
|
|
break;
|
|
case Expand: {
|
|
SDOperand Lo, Hi;
|
|
ExpandOp(Node->getOperand(1), Lo, Hi);
|
|
Result = DAG.getNode(ISD::RET, MVT::Other, Tmp1, Lo, Hi);
|
|
break;
|
|
}
|
|
case Promote:
|
|
Tmp2 = PromoteOp(Node->getOperand(1));
|
|
Result = DAG.UpdateNodeOperands(Result, Tmp1, Tmp2);
|
|
Result = LegalizeOp(Result);
|
|
break;
|
|
}
|
|
break;
|
|
case 1: // ret void
|
|
Result = DAG.UpdateNodeOperands(Result, Tmp1);
|
|
break;
|
|
default: { // ret <values>
|
|
std::vector<SDOperand> NewValues;
|
|
NewValues.push_back(Tmp1);
|
|
for (unsigned i = 1, e = Node->getNumOperands(); i != e; ++i)
|
|
switch (getTypeAction(Node->getOperand(i).getValueType())) {
|
|
case Legal:
|
|
NewValues.push_back(LegalizeOp(Node->getOperand(i)));
|
|
break;
|
|
case Expand: {
|
|
SDOperand Lo, Hi;
|
|
ExpandOp(Node->getOperand(i), Lo, Hi);
|
|
NewValues.push_back(Lo);
|
|
NewValues.push_back(Hi);
|
|
break;
|
|
}
|
|
case Promote:
|
|
assert(0 && "Can't promote multiple return value yet!");
|
|
}
|
|
|
|
if (NewValues.size() == Node->getNumOperands())
|
|
Result = DAG.UpdateNodeOperands(Result, NewValues);
|
|
else
|
|
Result = DAG.getNode(ISD::RET, MVT::Other, NewValues);
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (Result.getOpcode() == ISD::RET) {
|
|
switch (TLI.getOperationAction(Result.getOpcode(), MVT::Other)) {
|
|
default: assert(0 && "This action is not supported yet!");
|
|
case TargetLowering::Legal: break;
|
|
case TargetLowering::Custom:
|
|
Tmp1 = TLI.LowerOperation(Result, DAG);
|
|
if (Tmp1.Val) Result = Tmp1;
|
|
break;
|
|
}
|
|
}
|
|
break;
|
|
case ISD::STORE: {
|
|
Tmp1 = LegalizeOp(Node->getOperand(0)); // Legalize the chain.
|
|
Tmp2 = LegalizeOp(Node->getOperand(2)); // Legalize the pointer.
|
|
|
|
// Turn 'store float 1.0, Ptr' -> 'store int 0x12345678, Ptr'
|
|
// FIXME: We shouldn't do this for TargetConstantFP's.
|
|
// FIXME: move this to the DAG Combiner!
|
|
if (ConstantFPSDNode *CFP =dyn_cast<ConstantFPSDNode>(Node->getOperand(1))){
|
|
if (CFP->getValueType(0) == MVT::f32) {
|
|
Tmp3 = DAG.getConstant(FloatToBits(CFP->getValue()), MVT::i32);
|
|
} else {
|
|
assert(CFP->getValueType(0) == MVT::f64 && "Unknown FP type!");
|
|
Tmp3 = DAG.getConstant(DoubleToBits(CFP->getValue()), MVT::i64);
|
|
}
|
|
Result = DAG.getNode(ISD::STORE, MVT::Other, Tmp1, Tmp3, Tmp2,
|
|
Node->getOperand(3));
|
|
break;
|
|
}
|
|
|
|
switch (getTypeAction(Node->getOperand(1).getValueType())) {
|
|
case Legal: {
|
|
Tmp3 = LegalizeOp(Node->getOperand(1));
|
|
Result = DAG.UpdateNodeOperands(Result, Tmp1, Tmp3, Tmp2,
|
|
Node->getOperand(3));
|
|
|
|
MVT::ValueType VT = Tmp3.getValueType();
|
|
switch (TLI.getOperationAction(ISD::STORE, VT)) {
|
|
default: assert(0 && "This action is not supported yet!");
|
|
case TargetLowering::Legal: break;
|
|
case TargetLowering::Custom:
|
|
Tmp1 = TLI.LowerOperation(Result, DAG);
|
|
if (Tmp1.Val) Result = Tmp1;
|
|
break;
|
|
}
|
|
break;
|
|
}
|
|
case Promote:
|
|
// Truncate the value and store the result.
|
|
Tmp3 = PromoteOp(Node->getOperand(1));
|
|
Result = DAG.getNode(ISD::TRUNCSTORE, MVT::Other, Tmp1, Tmp3, Tmp2,
|
|
Node->getOperand(3),
|
|
DAG.getValueType(Node->getOperand(1).getValueType()));
|
|
break;
|
|
|
|
case Expand:
|
|
unsigned IncrementSize = 0;
|
|
SDOperand Lo, Hi;
|
|
|
|
// If this is a vector type, then we have to calculate the increment as
|
|
// the product of the element size in bytes, and the number of elements
|
|
// in the high half of the vector.
|
|
if (Node->getOperand(1).getValueType() == MVT::Vector) {
|
|
SDNode *InVal = Node->getOperand(1).Val;
|
|
unsigned NumElems =
|
|
cast<ConstantSDNode>(*(InVal->op_end()-2))->getValue();
|
|
MVT::ValueType EVT = cast<VTSDNode>(*(InVal->op_end()-1))->getVT();
|
|
|
|
// Figure out if there is a Packed type corresponding to this Vector
|
|
// type. If so, convert to the packed type.
|
|
MVT::ValueType TVT = MVT::getVectorType(EVT, NumElems);
|
|
if (TVT != MVT::Other && TLI.isTypeLegal(TVT)) {
|
|
// Turn this into a normal store of the packed type.
|
|
Tmp3 = PackVectorOp(Node->getOperand(1), TVT);
|
|
Result = DAG.UpdateNodeOperands(Result, Tmp1, Tmp3, Tmp2,
|
|
Node->getOperand(3));
|
|
break;
|
|
} else if (NumElems == 1) {
|
|
// Turn this into a normal store of the scalar type.
|
|
Tmp3 = PackVectorOp(Node->getOperand(1), EVT);
|
|
Result = DAG.UpdateNodeOperands(Result, Tmp1, Tmp3, Tmp2,
|
|
Node->getOperand(3));
|
|
break;
|
|
} else {
|
|
SplitVectorOp(Node->getOperand(1), Lo, Hi);
|
|
IncrementSize = NumElems/2 * MVT::getSizeInBits(EVT)/8;
|
|
}
|
|
} else {
|
|
ExpandOp(Node->getOperand(1), Lo, Hi);
|
|
IncrementSize = MVT::getSizeInBits(Hi.getValueType())/8;
|
|
}
|
|
|
|
if (!TLI.isLittleEndian())
|
|
std::swap(Lo, Hi);
|
|
|
|
Lo = DAG.getNode(ISD::STORE, MVT::Other, Tmp1, Lo, Tmp2,
|
|
Node->getOperand(3));
|
|
Tmp2 = DAG.getNode(ISD::ADD, Tmp2.getValueType(), Tmp2,
|
|
getIntPtrConstant(IncrementSize));
|
|
assert(isTypeLegal(Tmp2.getValueType()) &&
|
|
"Pointers must be legal!");
|
|
// FIXME: This sets the srcvalue of both halves to be the same, which is
|
|
// wrong.
|
|
Hi = DAG.getNode(ISD::STORE, MVT::Other, Tmp1, Hi, Tmp2,
|
|
Node->getOperand(3));
|
|
Result = DAG.getNode(ISD::TokenFactor, MVT::Other, Lo, Hi);
|
|
break;
|
|
}
|
|
break;
|
|
}
|
|
case ISD::PCMARKER:
|
|
Tmp1 = LegalizeOp(Node->getOperand(0)); // Legalize the chain.
|
|
Result = DAG.UpdateNodeOperands(Result, Tmp1, Node->getOperand(1));
|
|
break;
|
|
case ISD::STACKSAVE:
|
|
Tmp1 = LegalizeOp(Node->getOperand(0)); // Legalize the chain.
|
|
Result = DAG.UpdateNodeOperands(Result, Tmp1);
|
|
Tmp1 = Result.getValue(0);
|
|
Tmp2 = Result.getValue(1);
|
|
|
|
switch (TLI.getOperationAction(ISD::STACKSAVE, MVT::Other)) {
|
|
default: assert(0 && "This action is not supported yet!");
|
|
case TargetLowering::Legal: break;
|
|
case TargetLowering::Custom:
|
|
Tmp3 = TLI.LowerOperation(Result, DAG);
|
|
if (Tmp3.Val) {
|
|
Tmp1 = LegalizeOp(Tmp3);
|
|
Tmp2 = LegalizeOp(Tmp3.getValue(1));
|
|
}
|
|
break;
|
|
case TargetLowering::Expand:
|
|
// Expand to CopyFromReg if the target set
|
|
// StackPointerRegisterToSaveRestore.
|
|
if (unsigned SP = TLI.getStackPointerRegisterToSaveRestore()) {
|
|
Tmp1 = DAG.getCopyFromReg(Result.getOperand(0), SP,
|
|
Node->getValueType(0));
|
|
Tmp2 = Tmp1.getValue(1);
|
|
} else {
|
|
Tmp1 = DAG.getNode(ISD::UNDEF, Node->getValueType(0));
|
|
Tmp2 = Node->getOperand(0);
|
|
}
|
|
break;
|
|
}
|
|
|
|
// Since stacksave produce two values, make sure to remember that we
|
|
// legalized both of them.
|
|
AddLegalizedOperand(SDOperand(Node, 0), Tmp1);
|
|
AddLegalizedOperand(SDOperand(Node, 1), Tmp2);
|
|
return Op.ResNo ? Tmp2 : Tmp1;
|
|
|
|
case ISD::STACKRESTORE:
|
|
Tmp1 = LegalizeOp(Node->getOperand(0)); // Legalize the chain.
|
|
Tmp2 = LegalizeOp(Node->getOperand(1)); // Legalize the pointer.
|
|
Result = DAG.UpdateNodeOperands(Result, Tmp1, Tmp2);
|
|
|
|
switch (TLI.getOperationAction(ISD::STACKRESTORE, MVT::Other)) {
|
|
default: assert(0 && "This action is not supported yet!");
|
|
case TargetLowering::Legal: break;
|
|
case TargetLowering::Custom:
|
|
Tmp1 = TLI.LowerOperation(Result, DAG);
|
|
if (Tmp1.Val) Result = Tmp1;
|
|
break;
|
|
case TargetLowering::Expand:
|
|
// Expand to CopyToReg if the target set
|
|
// StackPointerRegisterToSaveRestore.
|
|
if (unsigned SP = TLI.getStackPointerRegisterToSaveRestore()) {
|
|
Result = DAG.getCopyToReg(Tmp1, SP, Tmp2);
|
|
} else {
|
|
Result = Tmp1;
|
|
}
|
|
break;
|
|
}
|
|
break;
|
|
|
|
case ISD::READCYCLECOUNTER:
|
|
Tmp1 = LegalizeOp(Node->getOperand(0)); // Legalize the chain
|
|
Result = DAG.UpdateNodeOperands(Result, Tmp1);
|
|
|
|
// Since rdcc produce two values, make sure to remember that we legalized
|
|
// both of them.
|
|
AddLegalizedOperand(SDOperand(Node, 0), Result.getValue(0));
|
|
AddLegalizedOperand(SDOperand(Node, 1), Result.getValue(1));
|
|
return Result;
|
|
|
|
case ISD::TRUNCSTORE: {
|
|
Tmp1 = LegalizeOp(Node->getOperand(0)); // Legalize the chain.
|
|
Tmp3 = LegalizeOp(Node->getOperand(2)); // Legalize the pointer.
|
|
|
|
assert(isTypeLegal(Node->getOperand(1).getValueType()) &&
|
|
"Cannot handle illegal TRUNCSTORE yet!");
|
|
Tmp2 = LegalizeOp(Node->getOperand(1));
|
|
|
|
// The only promote case we handle is TRUNCSTORE:i1 X into
|
|
// -> TRUNCSTORE:i8 (and X, 1)
|
|
if (cast<VTSDNode>(Node->getOperand(4))->getVT() == MVT::i1 &&
|
|
TLI.getOperationAction(ISD::TRUNCSTORE, MVT::i1) ==
|
|
TargetLowering::Promote) {
|
|
// Promote the bool to a mask then store.
|
|
Tmp2 = DAG.getNode(ISD::AND, Tmp2.getValueType(), Tmp2,
|
|
DAG.getConstant(1, Tmp2.getValueType()));
|
|
Result = DAG.getNode(ISD::TRUNCSTORE, MVT::Other, Tmp1, Tmp2, Tmp3,
|
|
Node->getOperand(3), DAG.getValueType(MVT::i8));
|
|
|
|
} else if (Tmp1 != Node->getOperand(0) || Tmp2 != Node->getOperand(1) ||
|
|
Tmp3 != Node->getOperand(2)) {
|
|
Result = DAG.UpdateNodeOperands(Result, Tmp1, Tmp2, Tmp3,
|
|
Node->getOperand(3), Node->getOperand(4));
|
|
}
|
|
|
|
MVT::ValueType StVT = cast<VTSDNode>(Result.Val->getOperand(4))->getVT();
|
|
switch (TLI.getOperationAction(Result.Val->getOpcode(), StVT)) {
|
|
default: assert(0 && "This action is not supported yet!");
|
|
case TargetLowering::Legal: break;
|
|
case TargetLowering::Custom:
|
|
Tmp1 = TLI.LowerOperation(Result, DAG);
|
|
if (Tmp1.Val) Result = Tmp1;
|
|
break;
|
|
}
|
|
break;
|
|
}
|
|
case ISD::SELECT:
|
|
switch (getTypeAction(Node->getOperand(0).getValueType())) {
|
|
case Expand: assert(0 && "It's impossible to expand bools");
|
|
case Legal:
|
|
Tmp1 = LegalizeOp(Node->getOperand(0)); // Legalize the condition.
|
|
break;
|
|
case Promote:
|
|
Tmp1 = PromoteOp(Node->getOperand(0)); // Promote the condition.
|
|
break;
|
|
}
|
|
Tmp2 = LegalizeOp(Node->getOperand(1)); // TrueVal
|
|
Tmp3 = LegalizeOp(Node->getOperand(2)); // FalseVal
|
|
|
|
Result = DAG.UpdateNodeOperands(Result, Tmp1, Tmp2, Tmp3);
|
|
|
|
switch (TLI.getOperationAction(ISD::SELECT, Tmp2.getValueType())) {
|
|
default: assert(0 && "This action is not supported yet!");
|
|
case TargetLowering::Legal: break;
|
|
case TargetLowering::Custom: {
|
|
Tmp1 = TLI.LowerOperation(Result, DAG);
|
|
if (Tmp1.Val) Result = Tmp1;
|
|
break;
|
|
}
|
|
case TargetLowering::Expand:
|
|
if (Tmp1.getOpcode() == ISD::SETCC) {
|
|
Result = DAG.getSelectCC(Tmp1.getOperand(0), Tmp1.getOperand(1),
|
|
Tmp2, Tmp3,
|
|
cast<CondCodeSDNode>(Tmp1.getOperand(2))->get());
|
|
} else {
|
|
// Make sure the condition is either zero or one. It may have been
|
|
// promoted from something else.
|
|
unsigned NumBits = MVT::getSizeInBits(Tmp1.getValueType());
|
|
if (!TLI.MaskedValueIsZero(Tmp1, (~0ULL >> (64-NumBits))^1))
|
|
Tmp1 = DAG.getZeroExtendInReg(Tmp1, MVT::i1);
|
|
Result = DAG.getSelectCC(Tmp1,
|
|
DAG.getConstant(0, Tmp1.getValueType()),
|
|
Tmp2, Tmp3, ISD::SETNE);
|
|
}
|
|
break;
|
|
case TargetLowering::Promote: {
|
|
MVT::ValueType NVT =
|
|
TLI.getTypeToPromoteTo(ISD::SELECT, Tmp2.getValueType());
|
|
unsigned ExtOp, TruncOp;
|
|
if (MVT::isInteger(Tmp2.getValueType())) {
|
|
ExtOp = ISD::ANY_EXTEND;
|
|
TruncOp = ISD::TRUNCATE;
|
|
} else {
|
|
ExtOp = ISD::FP_EXTEND;
|
|
TruncOp = ISD::FP_ROUND;
|
|
}
|
|
// Promote each of the values to the new type.
|
|
Tmp2 = DAG.getNode(ExtOp, NVT, Tmp2);
|
|
Tmp3 = DAG.getNode(ExtOp, NVT, Tmp3);
|
|
// Perform the larger operation, then round down.
|
|
Result = DAG.getNode(ISD::SELECT, NVT, Tmp1, Tmp2,Tmp3);
|
|
Result = DAG.getNode(TruncOp, Node->getValueType(0), Result);
|
|
break;
|
|
}
|
|
}
|
|
break;
|
|
case ISD::SELECT_CC: {
|
|
Tmp1 = Node->getOperand(0); // LHS
|
|
Tmp2 = Node->getOperand(1); // RHS
|
|
Tmp3 = LegalizeOp(Node->getOperand(2)); // True
|
|
Tmp4 = LegalizeOp(Node->getOperand(3)); // False
|
|
SDOperand CC = Node->getOperand(4);
|
|
|
|
LegalizeSetCCOperands(Tmp1, Tmp2, CC);
|
|
|
|
// If we didn't get both a LHS and RHS back from LegalizeSetCCOperands,
|
|
// the LHS is a legal SETCC itself. In this case, we need to compare
|
|
// the result against zero to select between true and false values.
|
|
if (Tmp2.Val == 0) {
|
|
Tmp2 = DAG.getConstant(0, Tmp1.getValueType());
|
|
CC = DAG.getCondCode(ISD::SETNE);
|
|
}
|
|
Result = DAG.UpdateNodeOperands(Result, Tmp1, Tmp2, Tmp3, Tmp4, CC);
|
|
|
|
// Everything is legal, see if we should expand this op or something.
|
|
switch (TLI.getOperationAction(ISD::SELECT_CC, Tmp3.getValueType())) {
|
|
default: assert(0 && "This action is not supported yet!");
|
|
case TargetLowering::Legal: break;
|
|
case TargetLowering::Custom:
|
|
Tmp1 = TLI.LowerOperation(Result, DAG);
|
|
if (Tmp1.Val) Result = Tmp1;
|
|
break;
|
|
}
|
|
break;
|
|
}
|
|
case ISD::SETCC:
|
|
Tmp1 = Node->getOperand(0);
|
|
Tmp2 = Node->getOperand(1);
|
|
Tmp3 = Node->getOperand(2);
|
|
LegalizeSetCCOperands(Tmp1, Tmp2, Tmp3);
|
|
|
|
// If we had to Expand the SetCC operands into a SELECT node, then it may
|
|
// not always be possible to return a true LHS & RHS. In this case, just
|
|
// return the value we legalized, returned in the LHS
|
|
if (Tmp2.Val == 0) {
|
|
Result = Tmp1;
|
|
break;
|
|
}
|
|
|
|
switch (TLI.getOperationAction(ISD::SETCC, Tmp1.getValueType())) {
|
|
default: assert(0 && "Cannot handle this action for SETCC yet!");
|
|
case TargetLowering::Custom:
|
|
isCustom = true;
|
|
// FALLTHROUGH.
|
|
case TargetLowering::Legal:
|
|
Result = DAG.UpdateNodeOperands(Result, Tmp1, Tmp2, Node->getOperand(2));
|
|
if (isCustom) {
|
|
Tmp3 = TLI.LowerOperation(Result, DAG);
|
|
if (Tmp3.Val) Result = Tmp3;
|
|
}
|
|
break;
|
|
case TargetLowering::Promote: {
|
|
// First step, figure out the appropriate operation to use.
|
|
// Allow SETCC to not be supported for all legal data types
|
|
// Mostly this targets FP
|
|
MVT::ValueType NewInTy = Node->getOperand(0).getValueType();
|
|
MVT::ValueType OldVT = NewInTy;
|
|
|
|
// Scan for the appropriate larger type to use.
|
|
while (1) {
|
|
NewInTy = (MVT::ValueType)(NewInTy+1);
|
|
|
|
assert(MVT::isInteger(NewInTy) == MVT::isInteger(OldVT) &&
|
|
"Fell off of the edge of the integer world");
|
|
assert(MVT::isFloatingPoint(NewInTy) == MVT::isFloatingPoint(OldVT) &&
|
|
"Fell off of the edge of the floating point world");
|
|
|
|
// If the target supports SETCC of this type, use it.
|
|
if (TLI.isOperationLegal(ISD::SETCC, NewInTy))
|
|
break;
|
|
}
|
|
if (MVT::isInteger(NewInTy))
|
|
assert(0 && "Cannot promote Legal Integer SETCC yet");
|
|
else {
|
|
Tmp1 = DAG.getNode(ISD::FP_EXTEND, NewInTy, Tmp1);
|
|
Tmp2 = DAG.getNode(ISD::FP_EXTEND, NewInTy, Tmp2);
|
|
}
|
|
Tmp1 = LegalizeOp(Tmp1);
|
|
Tmp2 = LegalizeOp(Tmp2);
|
|
Result = DAG.UpdateNodeOperands(Result, Tmp1, Tmp2, Node->getOperand(2));
|
|
Result = LegalizeOp(Result);
|
|
break;
|
|
}
|
|
case TargetLowering::Expand:
|
|
// Expand a setcc node into a select_cc of the same condition, lhs, and
|
|
// rhs that selects between const 1 (true) and const 0 (false).
|
|
MVT::ValueType VT = Node->getValueType(0);
|
|
Result = DAG.getNode(ISD::SELECT_CC, VT, Tmp1, Tmp2,
|
|
DAG.getConstant(1, VT), DAG.getConstant(0, VT),
|
|
Node->getOperand(2));
|
|
break;
|
|
}
|
|
break;
|
|
case ISD::MEMSET:
|
|
case ISD::MEMCPY:
|
|
case ISD::MEMMOVE: {
|
|
Tmp1 = LegalizeOp(Node->getOperand(0)); // Chain
|
|
Tmp2 = LegalizeOp(Node->getOperand(1)); // Pointer
|
|
|
|
if (Node->getOpcode() == ISD::MEMSET) { // memset = ubyte
|
|
switch (getTypeAction(Node->getOperand(2).getValueType())) {
|
|
case Expand: assert(0 && "Cannot expand a byte!");
|
|
case Legal:
|
|
Tmp3 = LegalizeOp(Node->getOperand(2));
|
|
break;
|
|
case Promote:
|
|
Tmp3 = PromoteOp(Node->getOperand(2));
|
|
break;
|
|
}
|
|
} else {
|
|
Tmp3 = LegalizeOp(Node->getOperand(2)); // memcpy/move = pointer,
|
|
}
|
|
|
|
SDOperand Tmp4;
|
|
switch (getTypeAction(Node->getOperand(3).getValueType())) {
|
|
case Expand: {
|
|
// Length is too big, just take the lo-part of the length.
|
|
SDOperand HiPart;
|
|
ExpandOp(Node->getOperand(3), HiPart, Tmp4);
|
|
break;
|
|
}
|
|
case Legal:
|
|
Tmp4 = LegalizeOp(Node->getOperand(3));
|
|
break;
|
|
case Promote:
|
|
Tmp4 = PromoteOp(Node->getOperand(3));
|
|
break;
|
|
}
|
|
|
|
SDOperand Tmp5;
|
|
switch (getTypeAction(Node->getOperand(4).getValueType())) { // uint
|
|
case Expand: assert(0 && "Cannot expand this yet!");
|
|
case Legal:
|
|
Tmp5 = LegalizeOp(Node->getOperand(4));
|
|
break;
|
|
case Promote:
|
|
Tmp5 = PromoteOp(Node->getOperand(4));
|
|
break;
|
|
}
|
|
|
|
switch (TLI.getOperationAction(Node->getOpcode(), MVT::Other)) {
|
|
default: assert(0 && "This action not implemented for this operation!");
|
|
case TargetLowering::Custom:
|
|
isCustom = true;
|
|
// FALLTHROUGH
|
|
case TargetLowering::Legal:
|
|
Result = DAG.UpdateNodeOperands(Result, Tmp1, Tmp2, Tmp3, Tmp4, Tmp5);
|
|
if (isCustom) {
|
|
Tmp1 = TLI.LowerOperation(Result, DAG);
|
|
if (Tmp1.Val) Result = Tmp1;
|
|
}
|
|
break;
|
|
case TargetLowering::Expand: {
|
|
// Otherwise, the target does not support this operation. Lower the
|
|
// operation to an explicit libcall as appropriate.
|
|
MVT::ValueType IntPtr = TLI.getPointerTy();
|
|
const Type *IntPtrTy = TLI.getTargetData().getIntPtrType();
|
|
std::vector<std::pair<SDOperand, const Type*> > Args;
|
|
|
|
const char *FnName = 0;
|
|
if (Node->getOpcode() == ISD::MEMSET) {
|
|
Args.push_back(std::make_pair(Tmp2, IntPtrTy));
|
|
// Extend the (previously legalized) ubyte argument to be an int value
|
|
// for the call.
|
|
if (Tmp3.getValueType() > MVT::i32)
|
|
Tmp3 = DAG.getNode(ISD::TRUNCATE, MVT::i32, Tmp3);
|
|
else
|
|
Tmp3 = DAG.getNode(ISD::ZERO_EXTEND, MVT::i32, Tmp3);
|
|
Args.push_back(std::make_pair(Tmp3, Type::IntTy));
|
|
Args.push_back(std::make_pair(Tmp4, IntPtrTy));
|
|
|
|
FnName = "memset";
|
|
} else if (Node->getOpcode() == ISD::MEMCPY ||
|
|
Node->getOpcode() == ISD::MEMMOVE) {
|
|
Args.push_back(std::make_pair(Tmp2, IntPtrTy));
|
|
Args.push_back(std::make_pair(Tmp3, IntPtrTy));
|
|
Args.push_back(std::make_pair(Tmp4, IntPtrTy));
|
|
FnName = Node->getOpcode() == ISD::MEMMOVE ? "memmove" : "memcpy";
|
|
} else {
|
|
assert(0 && "Unknown op!");
|
|
}
|
|
|
|
std::pair<SDOperand,SDOperand> CallResult =
|
|
TLI.LowerCallTo(Tmp1, Type::VoidTy, false, CallingConv::C, false,
|
|
DAG.getExternalSymbol(FnName, IntPtr), Args, DAG);
|
|
Result = CallResult.second;
|
|
break;
|
|
}
|
|
}
|
|
break;
|
|
}
|
|
|
|
case ISD::SHL_PARTS:
|
|
case ISD::SRA_PARTS:
|
|
case ISD::SRL_PARTS: {
|
|
std::vector<SDOperand> Ops;
|
|
bool Changed = false;
|
|
for (unsigned i = 0, e = Node->getNumOperands(); i != e; ++i) {
|
|
Ops.push_back(LegalizeOp(Node->getOperand(i)));
|
|
Changed |= Ops.back() != Node->getOperand(i);
|
|
}
|
|
if (Changed)
|
|
Result = DAG.UpdateNodeOperands(Result, Ops);
|
|
|
|
switch (TLI.getOperationAction(Node->getOpcode(),
|
|
Node->getValueType(0))) {
|
|
default: assert(0 && "This action is not supported yet!");
|
|
case TargetLowering::Legal: break;
|
|
case TargetLowering::Custom:
|
|
Tmp1 = TLI.LowerOperation(Result, DAG);
|
|
if (Tmp1.Val) {
|
|
SDOperand Tmp2, RetVal(0, 0);
|
|
for (unsigned i = 0, e = Node->getNumValues(); i != e; ++i) {
|
|
Tmp2 = LegalizeOp(Tmp1.getValue(i));
|
|
AddLegalizedOperand(SDOperand(Node, i), Tmp2);
|
|
if (i == Op.ResNo)
|
|
RetVal = Tmp2;
|
|
}
|
|
assert(RetVal.Val && "Illegal result number");
|
|
return RetVal;
|
|
}
|
|
break;
|
|
}
|
|
|
|
// Since these produce multiple values, make sure to remember that we
|
|
// legalized all of them.
|
|
for (unsigned i = 0, e = Node->getNumValues(); i != e; ++i)
|
|
AddLegalizedOperand(SDOperand(Node, i), Result.getValue(i));
|
|
return Result.getValue(Op.ResNo);
|
|
}
|
|
|
|
// Binary operators
|
|
case ISD::ADD:
|
|
case ISD::SUB:
|
|
case ISD::MUL:
|
|
case ISD::MULHS:
|
|
case ISD::MULHU:
|
|
case ISD::UDIV:
|
|
case ISD::SDIV:
|
|
case ISD::AND:
|
|
case ISD::OR:
|
|
case ISD::XOR:
|
|
case ISD::SHL:
|
|
case ISD::SRL:
|
|
case ISD::SRA:
|
|
case ISD::FADD:
|
|
case ISD::FSUB:
|
|
case ISD::FMUL:
|
|
case ISD::FDIV:
|
|
Tmp1 = LegalizeOp(Node->getOperand(0)); // LHS
|
|
switch (getTypeAction(Node->getOperand(1).getValueType())) {
|
|
case Expand: assert(0 && "Not possible");
|
|
case Legal:
|
|
Tmp2 = LegalizeOp(Node->getOperand(1)); // Legalize the RHS.
|
|
break;
|
|
case Promote:
|
|
Tmp2 = PromoteOp(Node->getOperand(1)); // Promote the RHS.
|
|
break;
|
|
}
|
|
|
|
Result = DAG.UpdateNodeOperands(Result, Tmp1, Tmp2);
|
|
|
|
switch (TLI.getOperationAction(Node->getOpcode(), Node->getValueType(0))) {
|
|
default: assert(0 && "Operation not supported");
|
|
case TargetLowering::Legal: break;
|
|
case TargetLowering::Custom:
|
|
Tmp1 = TLI.LowerOperation(Result, DAG);
|
|
if (Tmp1.Val) Result = Tmp1;
|
|
break;
|
|
}
|
|
break;
|
|
|
|
case ISD::FCOPYSIGN: // FCOPYSIGN does not require LHS/RHS to match type!
|
|
Tmp1 = LegalizeOp(Node->getOperand(0)); // LHS
|
|
switch (getTypeAction(Node->getOperand(1).getValueType())) {
|
|
case Expand: assert(0 && "Not possible");
|
|
case Legal:
|
|
Tmp2 = LegalizeOp(Node->getOperand(1)); // Legalize the RHS.
|
|
break;
|
|
case Promote:
|
|
Tmp2 = PromoteOp(Node->getOperand(1)); // Promote the RHS.
|
|
break;
|
|
}
|
|
|
|
Result = DAG.UpdateNodeOperands(Result, Tmp1, Tmp2);
|
|
|
|
switch (TLI.getOperationAction(Node->getOpcode(), Node->getValueType(0))) {
|
|
default: assert(0 && "Operation not supported");
|
|
case TargetLowering::Custom:
|
|
Tmp1 = TLI.LowerOperation(Result, DAG);
|
|
if (Tmp1.Val) Result = Tmp1;
|
|
break;
|
|
case TargetLowering::Legal: break;
|
|
case TargetLowering::Expand:
|
|
// If this target supports fabs/fneg natively, do this efficiently.
|
|
if (TLI.isOperationLegal(ISD::FABS, Tmp1.getValueType()) &&
|
|
TLI.isOperationLegal(ISD::FNEG, Tmp1.getValueType())) {
|
|
// Get the sign bit of the RHS.
|
|
MVT::ValueType IVT =
|
|
Tmp2.getValueType() == MVT::f32 ? MVT::i32 : MVT::i64;
|
|
SDOperand SignBit = DAG.getNode(ISD::BIT_CONVERT, IVT, Tmp2);
|
|
SignBit = DAG.getSetCC(TLI.getSetCCResultTy(),
|
|
SignBit, DAG.getConstant(0, IVT), ISD::SETLT);
|
|
// Get the absolute value of the result.
|
|
SDOperand AbsVal = DAG.getNode(ISD::FABS, Tmp1.getValueType(), Tmp1);
|
|
// Select between the nabs and abs value based on the sign bit of
|
|
// the input.
|
|
Result = DAG.getNode(ISD::SELECT, AbsVal.getValueType(), SignBit,
|
|
DAG.getNode(ISD::FNEG, AbsVal.getValueType(),
|
|
AbsVal),
|
|
AbsVal);
|
|
Result = LegalizeOp(Result);
|
|
break;
|
|
}
|
|
|
|
// Otherwise, do bitwise ops!
|
|
|
|
// copysign -> copysignf/copysign libcall.
|
|
const char *FnName;
|
|
if (Node->getValueType(0) == MVT::f32) {
|
|
FnName = "copysignf";
|
|
if (Tmp2.getValueType() != MVT::f32) // Force operands to match type.
|
|
Result = DAG.UpdateNodeOperands(Result, Tmp1,
|
|
DAG.getNode(ISD::FP_ROUND, MVT::f32, Tmp2));
|
|
} else {
|
|
FnName = "copysign";
|
|
if (Tmp2.getValueType() != MVT::f64) // Force operands to match type.
|
|
Result = DAG.UpdateNodeOperands(Result, Tmp1,
|
|
DAG.getNode(ISD::FP_EXTEND, MVT::f64, Tmp2));
|
|
}
|
|
SDOperand Dummy;
|
|
Result = ExpandLibCall(FnName, Node, Dummy);
|
|
break;
|
|
}
|
|
break;
|
|
|
|
case ISD::ADDC:
|
|
case ISD::SUBC:
|
|
Tmp1 = LegalizeOp(Node->getOperand(0));
|
|
Tmp2 = LegalizeOp(Node->getOperand(1));
|
|
Result = DAG.UpdateNodeOperands(Result, Tmp1, Tmp2);
|
|
// Since this produces two values, make sure to remember that we legalized
|
|
// both of them.
|
|
AddLegalizedOperand(SDOperand(Node, 0), Result.getValue(0));
|
|
AddLegalizedOperand(SDOperand(Node, 1), Result.getValue(1));
|
|
return Result;
|
|
|
|
case ISD::ADDE:
|
|
case ISD::SUBE:
|
|
Tmp1 = LegalizeOp(Node->getOperand(0));
|
|
Tmp2 = LegalizeOp(Node->getOperand(1));
|
|
Tmp3 = LegalizeOp(Node->getOperand(2));
|
|
Result = DAG.UpdateNodeOperands(Result, Tmp1, Tmp2, Tmp3);
|
|
// Since this produces two values, make sure to remember that we legalized
|
|
// both of them.
|
|
AddLegalizedOperand(SDOperand(Node, 0), Result.getValue(0));
|
|
AddLegalizedOperand(SDOperand(Node, 1), Result.getValue(1));
|
|
return Result;
|
|
|
|
case ISD::BUILD_PAIR: {
|
|
MVT::ValueType PairTy = Node->getValueType(0);
|
|
// TODO: handle the case where the Lo and Hi operands are not of legal type
|
|
Tmp1 = LegalizeOp(Node->getOperand(0)); // Lo
|
|
Tmp2 = LegalizeOp(Node->getOperand(1)); // Hi
|
|
switch (TLI.getOperationAction(ISD::BUILD_PAIR, PairTy)) {
|
|
case TargetLowering::Promote:
|
|
case TargetLowering::Custom:
|
|
assert(0 && "Cannot promote/custom this yet!");
|
|
case TargetLowering::Legal:
|
|
if (Tmp1 != Node->getOperand(0) || Tmp2 != Node->getOperand(1))
|
|
Result = DAG.getNode(ISD::BUILD_PAIR, PairTy, Tmp1, Tmp2);
|
|
break;
|
|
case TargetLowering::Expand:
|
|
Tmp1 = DAG.getNode(ISD::ZERO_EXTEND, PairTy, Tmp1);
|
|
Tmp2 = DAG.getNode(ISD::ANY_EXTEND, PairTy, Tmp2);
|
|
Tmp2 = DAG.getNode(ISD::SHL, PairTy, Tmp2,
|
|
DAG.getConstant(MVT::getSizeInBits(PairTy)/2,
|
|
TLI.getShiftAmountTy()));
|
|
Result = DAG.getNode(ISD::OR, PairTy, Tmp1, Tmp2);
|
|
break;
|
|
}
|
|
break;
|
|
}
|
|
|
|
case ISD::UREM:
|
|
case ISD::SREM:
|
|
case ISD::FREM:
|
|
Tmp1 = LegalizeOp(Node->getOperand(0)); // LHS
|
|
Tmp2 = LegalizeOp(Node->getOperand(1)); // RHS
|
|
|
|
switch (TLI.getOperationAction(Node->getOpcode(), Node->getValueType(0))) {
|
|
case TargetLowering::Promote: assert(0 && "Cannot promote this yet!");
|
|
case TargetLowering::Custom:
|
|
isCustom = true;
|
|
// FALLTHROUGH
|
|
case TargetLowering::Legal:
|
|
Result = DAG.UpdateNodeOperands(Result, Tmp1, Tmp2);
|
|
if (isCustom) {
|
|
Tmp1 = TLI.LowerOperation(Result, DAG);
|
|
if (Tmp1.Val) Result = Tmp1;
|
|
}
|
|
break;
|
|
case TargetLowering::Expand:
|
|
if (MVT::isInteger(Node->getValueType(0))) {
|
|
// X % Y -> X-X/Y*Y
|
|
MVT::ValueType VT = Node->getValueType(0);
|
|
unsigned Opc = Node->getOpcode() == ISD::UREM ? ISD::UDIV : ISD::SDIV;
|
|
Result = DAG.getNode(Opc, VT, Tmp1, Tmp2);
|
|
Result = DAG.getNode(ISD::MUL, VT, Result, Tmp2);
|
|
Result = DAG.getNode(ISD::SUB, VT, Tmp1, Result);
|
|
} else {
|
|
// Floating point mod -> fmod libcall.
|
|
const char *FnName = Node->getValueType(0) == MVT::f32 ? "fmodf":"fmod";
|
|
SDOperand Dummy;
|
|
Result = ExpandLibCall(FnName, Node, Dummy);
|
|
}
|
|
break;
|
|
}
|
|
break;
|
|
case ISD::VAARG: {
|
|
Tmp1 = LegalizeOp(Node->getOperand(0)); // Legalize the chain.
|
|
Tmp2 = LegalizeOp(Node->getOperand(1)); // Legalize the pointer.
|
|
|
|
MVT::ValueType VT = Node->getValueType(0);
|
|
switch (TLI.getOperationAction(Node->getOpcode(), MVT::Other)) {
|
|
default: assert(0 && "This action is not supported yet!");
|
|
case TargetLowering::Custom:
|
|
isCustom = true;
|
|
// FALLTHROUGH
|
|
case TargetLowering::Legal:
|
|
Result = DAG.UpdateNodeOperands(Result, Tmp1, Tmp2, Node->getOperand(2));
|
|
Result = Result.getValue(0);
|
|
Tmp1 = Result.getValue(1);
|
|
|
|
if (isCustom) {
|
|
Tmp2 = TLI.LowerOperation(Result, DAG);
|
|
if (Tmp2.Val) {
|
|
Result = LegalizeOp(Tmp2);
|
|
Tmp1 = LegalizeOp(Tmp2.getValue(1));
|
|
}
|
|
}
|
|
break;
|
|
case TargetLowering::Expand: {
|
|
SDOperand VAList = DAG.getLoad(TLI.getPointerTy(), Tmp1, Tmp2,
|
|
Node->getOperand(2));
|
|
// Increment the pointer, VAList, to the next vaarg
|
|
Tmp3 = DAG.getNode(ISD::ADD, TLI.getPointerTy(), VAList,
|
|
DAG.getConstant(MVT::getSizeInBits(VT)/8,
|
|
TLI.getPointerTy()));
|
|
// Store the incremented VAList to the legalized pointer
|
|
Tmp3 = DAG.getNode(ISD::STORE, MVT::Other, VAList.getValue(1), Tmp3, Tmp2,
|
|
Node->getOperand(2));
|
|
// Load the actual argument out of the pointer VAList
|
|
Result = DAG.getLoad(VT, Tmp3, VAList, DAG.getSrcValue(0));
|
|
Tmp1 = LegalizeOp(Result.getValue(1));
|
|
Result = LegalizeOp(Result);
|
|
break;
|
|
}
|
|
}
|
|
// Since VAARG produces two values, make sure to remember that we
|
|
// legalized both of them.
|
|
AddLegalizedOperand(SDOperand(Node, 0), Result);
|
|
AddLegalizedOperand(SDOperand(Node, 1), Tmp1);
|
|
return Op.ResNo ? Tmp1 : Result;
|
|
}
|
|
|
|
case ISD::VACOPY:
|
|
Tmp1 = LegalizeOp(Node->getOperand(0)); // Legalize the chain.
|
|
Tmp2 = LegalizeOp(Node->getOperand(1)); // Legalize the dest pointer.
|
|
Tmp3 = LegalizeOp(Node->getOperand(2)); // Legalize the source pointer.
|
|
|
|
switch (TLI.getOperationAction(ISD::VACOPY, MVT::Other)) {
|
|
default: assert(0 && "This action is not supported yet!");
|
|
case TargetLowering::Custom:
|
|
isCustom = true;
|
|
// FALLTHROUGH
|
|
case TargetLowering::Legal:
|
|
Result = DAG.UpdateNodeOperands(Result, Tmp1, Tmp2, Tmp3,
|
|
Node->getOperand(3), Node->getOperand(4));
|
|
if (isCustom) {
|
|
Tmp1 = TLI.LowerOperation(Result, DAG);
|
|
if (Tmp1.Val) Result = Tmp1;
|
|
}
|
|
break;
|
|
case TargetLowering::Expand:
|
|
// This defaults to loading a pointer from the input and storing it to the
|
|
// output, returning the chain.
|
|
Tmp4 = DAG.getLoad(TLI.getPointerTy(), Tmp1, Tmp3, Node->getOperand(3));
|
|
Result = DAG.getNode(ISD::STORE, MVT::Other, Tmp4.getValue(1), Tmp4, Tmp2,
|
|
Node->getOperand(4));
|
|
break;
|
|
}
|
|
break;
|
|
|
|
case ISD::VAEND:
|
|
Tmp1 = LegalizeOp(Node->getOperand(0)); // Legalize the chain.
|
|
Tmp2 = LegalizeOp(Node->getOperand(1)); // Legalize the pointer.
|
|
|
|
switch (TLI.getOperationAction(ISD::VAEND, MVT::Other)) {
|
|
default: assert(0 && "This action is not supported yet!");
|
|
case TargetLowering::Custom:
|
|
isCustom = true;
|
|
// FALLTHROUGH
|
|
case TargetLowering::Legal:
|
|
Result = DAG.UpdateNodeOperands(Result, Tmp1, Tmp2, Node->getOperand(2));
|
|
if (isCustom) {
|
|
Tmp1 = TLI.LowerOperation(Tmp1, DAG);
|
|
if (Tmp1.Val) Result = Tmp1;
|
|
}
|
|
break;
|
|
case TargetLowering::Expand:
|
|
Result = Tmp1; // Default to a no-op, return the chain
|
|
break;
|
|
}
|
|
break;
|
|
|
|
case ISD::VASTART:
|
|
Tmp1 = LegalizeOp(Node->getOperand(0)); // Legalize the chain.
|
|
Tmp2 = LegalizeOp(Node->getOperand(1)); // Legalize the pointer.
|
|
|
|
Result = DAG.UpdateNodeOperands(Result, Tmp1, Tmp2, Node->getOperand(2));
|
|
|
|
switch (TLI.getOperationAction(ISD::VASTART, MVT::Other)) {
|
|
default: assert(0 && "This action is not supported yet!");
|
|
case TargetLowering::Legal: break;
|
|
case TargetLowering::Custom:
|
|
Tmp1 = TLI.LowerOperation(Result, DAG);
|
|
if (Tmp1.Val) Result = Tmp1;
|
|
break;
|
|
}
|
|
break;
|
|
|
|
case ISD::ROTL:
|
|
case ISD::ROTR:
|
|
Tmp1 = LegalizeOp(Node->getOperand(0)); // LHS
|
|
Tmp2 = LegalizeOp(Node->getOperand(1)); // RHS
|
|
|
|
assert(TLI.isOperationLegal(Node->getOpcode(), Node->getValueType(0)) &&
|
|
"Cannot handle this yet!");
|
|
Result = DAG.UpdateNodeOperands(Result, Tmp1, Tmp2);
|
|
break;
|
|
|
|
case ISD::BSWAP:
|
|
Tmp1 = LegalizeOp(Node->getOperand(0)); // Op
|
|
switch (TLI.getOperationAction(Node->getOpcode(), Node->getValueType(0))) {
|
|
case TargetLowering::Custom:
|
|
assert(0 && "Cannot custom legalize this yet!");
|
|
case TargetLowering::Legal:
|
|
Result = DAG.UpdateNodeOperands(Result, Tmp1);
|
|
break;
|
|
case TargetLowering::Promote: {
|
|
MVT::ValueType OVT = Tmp1.getValueType();
|
|
MVT::ValueType NVT = TLI.getTypeToPromoteTo(Node->getOpcode(), OVT);
|
|
unsigned DiffBits = getSizeInBits(NVT) - getSizeInBits(OVT);
|
|
|
|
Tmp1 = DAG.getNode(ISD::ZERO_EXTEND, NVT, Tmp1);
|
|
Tmp1 = DAG.getNode(ISD::BSWAP, NVT, Tmp1);
|
|
Result = DAG.getNode(ISD::SRL, NVT, Tmp1,
|
|
DAG.getConstant(DiffBits, TLI.getShiftAmountTy()));
|
|
break;
|
|
}
|
|
case TargetLowering::Expand:
|
|
Result = ExpandBSWAP(Tmp1);
|
|
break;
|
|
}
|
|
break;
|
|
|
|
case ISD::CTPOP:
|
|
case ISD::CTTZ:
|
|
case ISD::CTLZ:
|
|
Tmp1 = LegalizeOp(Node->getOperand(0)); // Op
|
|
switch (TLI.getOperationAction(Node->getOpcode(), Node->getValueType(0))) {
|
|
case TargetLowering::Custom: assert(0 && "Cannot custom handle this yet!");
|
|
case TargetLowering::Legal:
|
|
Result = DAG.UpdateNodeOperands(Result, Tmp1);
|
|
break;
|
|
case TargetLowering::Promote: {
|
|
MVT::ValueType OVT = Tmp1.getValueType();
|
|
MVT::ValueType NVT = TLI.getTypeToPromoteTo(Node->getOpcode(), OVT);
|
|
|
|
// Zero extend the argument.
|
|
Tmp1 = DAG.getNode(ISD::ZERO_EXTEND, NVT, Tmp1);
|
|
// Perform the larger operation, then subtract if needed.
|
|
Tmp1 = DAG.getNode(Node->getOpcode(), Node->getValueType(0), Tmp1);
|
|
switch (Node->getOpcode()) {
|
|
case ISD::CTPOP:
|
|
Result = Tmp1;
|
|
break;
|
|
case ISD::CTTZ:
|
|
//if Tmp1 == sizeinbits(NVT) then Tmp1 = sizeinbits(Old VT)
|
|
Tmp2 = DAG.getSetCC(TLI.getSetCCResultTy(), Tmp1,
|
|
DAG.getConstant(getSizeInBits(NVT), NVT),
|
|
ISD::SETEQ);
|
|
Result = DAG.getNode(ISD::SELECT, NVT, Tmp2,
|
|
DAG.getConstant(getSizeInBits(OVT),NVT), Tmp1);
|
|
break;
|
|
case ISD::CTLZ:
|
|
// Tmp1 = Tmp1 - (sizeinbits(NVT) - sizeinbits(Old VT))
|
|
Result = DAG.getNode(ISD::SUB, NVT, Tmp1,
|
|
DAG.getConstant(getSizeInBits(NVT) -
|
|
getSizeInBits(OVT), NVT));
|
|
break;
|
|
}
|
|
break;
|
|
}
|
|
case TargetLowering::Expand:
|
|
Result = ExpandBitCount(Node->getOpcode(), Tmp1);
|
|
break;
|
|
}
|
|
break;
|
|
|
|
// Unary operators
|
|
case ISD::FABS:
|
|
case ISD::FNEG:
|
|
case ISD::FSQRT:
|
|
case ISD::FSIN:
|
|
case ISD::FCOS:
|
|
Tmp1 = LegalizeOp(Node->getOperand(0));
|
|
switch (TLI.getOperationAction(Node->getOpcode(), Node->getValueType(0))) {
|
|
case TargetLowering::Promote:
|
|
case TargetLowering::Custom:
|
|
isCustom = true;
|
|
// FALLTHROUGH
|
|
case TargetLowering::Legal:
|
|
Result = DAG.UpdateNodeOperands(Result, Tmp1);
|
|
if (isCustom) {
|
|
Tmp1 = TLI.LowerOperation(Result, DAG);
|
|
if (Tmp1.Val) Result = Tmp1;
|
|
}
|
|
break;
|
|
case TargetLowering::Expand:
|
|
switch (Node->getOpcode()) {
|
|
default: assert(0 && "Unreachable!");
|
|
case ISD::FNEG:
|
|
// Expand Y = FNEG(X) -> Y = SUB -0.0, X
|
|
Tmp2 = DAG.getConstantFP(-0.0, Node->getValueType(0));
|
|
Result = DAG.getNode(ISD::FSUB, Node->getValueType(0), Tmp2, Tmp1);
|
|
break;
|
|
case ISD::FABS: {
|
|
// Expand Y = FABS(X) -> Y = (X >u 0.0) ? X : fneg(X).
|
|
MVT::ValueType VT = Node->getValueType(0);
|
|
Tmp2 = DAG.getConstantFP(0.0, VT);
|
|
Tmp2 = DAG.getSetCC(TLI.getSetCCResultTy(), Tmp1, Tmp2, ISD::SETUGT);
|
|
Tmp3 = DAG.getNode(ISD::FNEG, VT, Tmp1);
|
|
Result = DAG.getNode(ISD::SELECT, VT, Tmp2, Tmp1, Tmp3);
|
|
break;
|
|
}
|
|
case ISD::FSQRT:
|
|
case ISD::FSIN:
|
|
case ISD::FCOS: {
|
|
MVT::ValueType VT = Node->getValueType(0);
|
|
const char *FnName = 0;
|
|
switch(Node->getOpcode()) {
|
|
case ISD::FSQRT: FnName = VT == MVT::f32 ? "sqrtf" : "sqrt"; break;
|
|
case ISD::FSIN: FnName = VT == MVT::f32 ? "sinf" : "sin"; break;
|
|
case ISD::FCOS: FnName = VT == MVT::f32 ? "cosf" : "cos"; break;
|
|
default: assert(0 && "Unreachable!");
|
|
}
|
|
SDOperand Dummy;
|
|
Result = ExpandLibCall(FnName, Node, Dummy);
|
|
break;
|
|
}
|
|
}
|
|
break;
|
|
}
|
|
break;
|
|
|
|
case ISD::BIT_CONVERT:
|
|
if (!isTypeLegal(Node->getOperand(0).getValueType())) {
|
|
Result = ExpandBIT_CONVERT(Node->getValueType(0), Node->getOperand(0));
|
|
} else {
|
|
switch (TLI.getOperationAction(ISD::BIT_CONVERT,
|
|
Node->getOperand(0).getValueType())) {
|
|
default: assert(0 && "Unknown operation action!");
|
|
case TargetLowering::Expand:
|
|
Result = ExpandBIT_CONVERT(Node->getValueType(0), Node->getOperand(0));
|
|
break;
|
|
case TargetLowering::Legal:
|
|
Tmp1 = LegalizeOp(Node->getOperand(0));
|
|
Result = DAG.UpdateNodeOperands(Result, Tmp1);
|
|
break;
|
|
}
|
|
}
|
|
break;
|
|
case ISD::VBIT_CONVERT: {
|
|
assert(Op.getOperand(0).getValueType() == MVT::Vector &&
|
|
"Can only have VBIT_CONVERT where input or output is MVT::Vector!");
|
|
|
|
// The input has to be a vector type, we have to either scalarize it, pack
|
|
// it, or convert it based on whether the input vector type is legal.
|
|
SDNode *InVal = Node->getOperand(0).Val;
|
|
unsigned NumElems =
|
|
cast<ConstantSDNode>(*(InVal->op_end()-2))->getValue();
|
|
MVT::ValueType EVT = cast<VTSDNode>(*(InVal->op_end()-1))->getVT();
|
|
|
|
// Figure out if there is a Packed type corresponding to this Vector
|
|
// type. If so, convert to the packed type.
|
|
MVT::ValueType TVT = MVT::getVectorType(EVT, NumElems);
|
|
if (TVT != MVT::Other && TLI.isTypeLegal(TVT)) {
|
|
// Turn this into a bit convert of the packed input.
|
|
Result = DAG.getNode(ISD::BIT_CONVERT, Node->getValueType(0),
|
|
PackVectorOp(Node->getOperand(0), TVT));
|
|
break;
|
|
} else if (NumElems == 1) {
|
|
// Turn this into a bit convert of the scalar input.
|
|
Result = DAG.getNode(ISD::BIT_CONVERT, Node->getValueType(0),
|
|
PackVectorOp(Node->getOperand(0), EVT));
|
|
break;
|
|
} else {
|
|
// FIXME: UNIMP! Store then reload
|
|
assert(0 && "Cast from unsupported vector type not implemented yet!");
|
|
}
|
|
}
|
|
|
|
// Conversion operators. The source and destination have different types.
|
|
case ISD::SINT_TO_FP:
|
|
case ISD::UINT_TO_FP: {
|
|
bool isSigned = Node->getOpcode() == ISD::SINT_TO_FP;
|
|
switch (getTypeAction(Node->getOperand(0).getValueType())) {
|
|
case Legal:
|
|
switch (TLI.getOperationAction(Node->getOpcode(),
|
|
Node->getOperand(0).getValueType())) {
|
|
default: assert(0 && "Unknown operation action!");
|
|
case TargetLowering::Custom:
|
|
isCustom = true;
|
|
// FALLTHROUGH
|
|
case TargetLowering::Legal:
|
|
Tmp1 = LegalizeOp(Node->getOperand(0));
|
|
Result = DAG.UpdateNodeOperands(Result, Tmp1);
|
|
if (isCustom) {
|
|
Tmp1 = TLI.LowerOperation(Result, DAG);
|
|
if (Tmp1.Val) Result = Tmp1;
|
|
}
|
|
break;
|
|
case TargetLowering::Expand:
|
|
Result = ExpandLegalINT_TO_FP(isSigned,
|
|
LegalizeOp(Node->getOperand(0)),
|
|
Node->getValueType(0));
|
|
break;
|
|
case TargetLowering::Promote:
|
|
Result = PromoteLegalINT_TO_FP(LegalizeOp(Node->getOperand(0)),
|
|
Node->getValueType(0),
|
|
isSigned);
|
|
break;
|
|
}
|
|
break;
|
|
case Expand:
|
|
Result = ExpandIntToFP(Node->getOpcode() == ISD::SINT_TO_FP,
|
|
Node->getValueType(0), Node->getOperand(0));
|
|
break;
|
|
case Promote:
|
|
Tmp1 = PromoteOp(Node->getOperand(0));
|
|
if (isSigned) {
|
|
Tmp1 = DAG.getNode(ISD::SIGN_EXTEND_INREG, Tmp1.getValueType(),
|
|
Tmp1, DAG.getValueType(Node->getOperand(0).getValueType()));
|
|
} else {
|
|
Tmp1 = DAG.getZeroExtendInReg(Tmp1,
|
|
Node->getOperand(0).getValueType());
|
|
}
|
|
Result = DAG.UpdateNodeOperands(Result, Tmp1);
|
|
Result = LegalizeOp(Result); // The 'op' is not necessarily legal!
|
|
break;
|
|
}
|
|
break;
|
|
}
|
|
case ISD::TRUNCATE:
|
|
switch (getTypeAction(Node->getOperand(0).getValueType())) {
|
|
case Legal:
|
|
Tmp1 = LegalizeOp(Node->getOperand(0));
|
|
Result = DAG.UpdateNodeOperands(Result, Tmp1);
|
|
break;
|
|
case Expand:
|
|
ExpandOp(Node->getOperand(0), Tmp1, Tmp2);
|
|
|
|
// Since the result is legal, we should just be able to truncate the low
|
|
// part of the source.
|
|
Result = DAG.getNode(ISD::TRUNCATE, Node->getValueType(0), Tmp1);
|
|
break;
|
|
case Promote:
|
|
Result = PromoteOp(Node->getOperand(0));
|
|
Result = DAG.getNode(ISD::TRUNCATE, Op.getValueType(), Result);
|
|
break;
|
|
}
|
|
break;
|
|
|
|
case ISD::FP_TO_SINT:
|
|
case ISD::FP_TO_UINT:
|
|
switch (getTypeAction(Node->getOperand(0).getValueType())) {
|
|
case Legal:
|
|
Tmp1 = LegalizeOp(Node->getOperand(0));
|
|
|
|
switch (TLI.getOperationAction(Node->getOpcode(), Node->getValueType(0))){
|
|
default: assert(0 && "Unknown operation action!");
|
|
case TargetLowering::Custom:
|
|
isCustom = true;
|
|
// FALLTHROUGH
|
|
case TargetLowering::Legal:
|
|
Result = DAG.UpdateNodeOperands(Result, Tmp1);
|
|
if (isCustom) {
|
|
Tmp1 = TLI.LowerOperation(Result, DAG);
|
|
if (Tmp1.Val) Result = Tmp1;
|
|
}
|
|
break;
|
|
case TargetLowering::Promote:
|
|
Result = PromoteLegalFP_TO_INT(Tmp1, Node->getValueType(0),
|
|
Node->getOpcode() == ISD::FP_TO_SINT);
|
|
break;
|
|
case TargetLowering::Expand:
|
|
if (Node->getOpcode() == ISD::FP_TO_UINT) {
|
|
SDOperand True, False;
|
|
MVT::ValueType VT = Node->getOperand(0).getValueType();
|
|
MVT::ValueType NVT = Node->getValueType(0);
|
|
unsigned ShiftAmt = MVT::getSizeInBits(Node->getValueType(0))-1;
|
|
Tmp2 = DAG.getConstantFP((double)(1ULL << ShiftAmt), VT);
|
|
Tmp3 = DAG.getSetCC(TLI.getSetCCResultTy(),
|
|
Node->getOperand(0), Tmp2, ISD::SETLT);
|
|
True = DAG.getNode(ISD::FP_TO_SINT, NVT, Node->getOperand(0));
|
|
False = DAG.getNode(ISD::FP_TO_SINT, NVT,
|
|
DAG.getNode(ISD::FSUB, VT, Node->getOperand(0),
|
|
Tmp2));
|
|
False = DAG.getNode(ISD::XOR, NVT, False,
|
|
DAG.getConstant(1ULL << ShiftAmt, NVT));
|
|
Result = DAG.getNode(ISD::SELECT, NVT, Tmp3, True, False);
|
|
break;
|
|
} else {
|
|
assert(0 && "Do not know how to expand FP_TO_SINT yet!");
|
|
}
|
|
break;
|
|
}
|
|
break;
|
|
case Expand:
|
|
assert(0 && "Shouldn't need to expand other operators here!");
|
|
case Promote:
|
|
Tmp1 = PromoteOp(Node->getOperand(0));
|
|
Result = DAG.UpdateNodeOperands(Result, LegalizeOp(Tmp1));
|
|
Result = LegalizeOp(Result);
|
|
break;
|
|
}
|
|
break;
|
|
|
|
case ISD::ANY_EXTEND:
|
|
case ISD::ZERO_EXTEND:
|
|
case ISD::SIGN_EXTEND:
|
|
case ISD::FP_EXTEND:
|
|
case ISD::FP_ROUND:
|
|
switch (getTypeAction(Node->getOperand(0).getValueType())) {
|
|
case Expand: assert(0 && "Shouldn't need to expand other operators here!");
|
|
case Legal:
|
|
Tmp1 = LegalizeOp(Node->getOperand(0));
|
|
Result = DAG.UpdateNodeOperands(Result, Tmp1);
|
|
break;
|
|
case Promote:
|
|
switch (Node->getOpcode()) {
|
|
case ISD::ANY_EXTEND:
|
|
Tmp1 = PromoteOp(Node->getOperand(0));
|
|
Result = DAG.getNode(ISD::ANY_EXTEND, Op.getValueType(), Tmp1);
|
|
break;
|
|
case ISD::ZERO_EXTEND:
|
|
Result = PromoteOp(Node->getOperand(0));
|
|
Result = DAG.getNode(ISD::ANY_EXTEND, Op.getValueType(), Result);
|
|
Result = DAG.getZeroExtendInReg(Result,
|
|
Node->getOperand(0).getValueType());
|
|
break;
|
|
case ISD::SIGN_EXTEND:
|
|
Result = PromoteOp(Node->getOperand(0));
|
|
Result = DAG.getNode(ISD::ANY_EXTEND, Op.getValueType(), Result);
|
|
Result = DAG.getNode(ISD::SIGN_EXTEND_INREG, Result.getValueType(),
|
|
Result,
|
|
DAG.getValueType(Node->getOperand(0).getValueType()));
|
|
break;
|
|
case ISD::FP_EXTEND:
|
|
Result = PromoteOp(Node->getOperand(0));
|
|
if (Result.getValueType() != Op.getValueType())
|
|
// Dynamically dead while we have only 2 FP types.
|
|
Result = DAG.getNode(ISD::FP_EXTEND, Op.getValueType(), Result);
|
|
break;
|
|
case ISD::FP_ROUND:
|
|
Result = PromoteOp(Node->getOperand(0));
|
|
Result = DAG.getNode(Node->getOpcode(), Op.getValueType(), Result);
|
|
break;
|
|
}
|
|
}
|
|
break;
|
|
case ISD::FP_ROUND_INREG:
|
|
case ISD::SIGN_EXTEND_INREG: {
|
|
Tmp1 = LegalizeOp(Node->getOperand(0));
|
|
MVT::ValueType ExtraVT = cast<VTSDNode>(Node->getOperand(1))->getVT();
|
|
|
|
// If this operation is not supported, convert it to a shl/shr or load/store
|
|
// pair.
|
|
switch (TLI.getOperationAction(Node->getOpcode(), ExtraVT)) {
|
|
default: assert(0 && "This action not supported for this op yet!");
|
|
case TargetLowering::Legal:
|
|
Result = DAG.UpdateNodeOperands(Result, Tmp1, Node->getOperand(1));
|
|
break;
|
|
case TargetLowering::Expand:
|
|
// If this is an integer extend and shifts are supported, do that.
|
|
if (Node->getOpcode() == ISD::SIGN_EXTEND_INREG) {
|
|
// NOTE: we could fall back on load/store here too for targets without
|
|
// SAR. However, it is doubtful that any exist.
|
|
unsigned BitsDiff = MVT::getSizeInBits(Node->getValueType(0)) -
|
|
MVT::getSizeInBits(ExtraVT);
|
|
SDOperand ShiftCst = DAG.getConstant(BitsDiff, TLI.getShiftAmountTy());
|
|
Result = DAG.getNode(ISD::SHL, Node->getValueType(0),
|
|
Node->getOperand(0), ShiftCst);
|
|
Result = DAG.getNode(ISD::SRA, Node->getValueType(0),
|
|
Result, ShiftCst);
|
|
} else if (Node->getOpcode() == ISD::FP_ROUND_INREG) {
|
|
// The only way we can lower this is to turn it into a STORETRUNC,
|
|
// EXTLOAD pair, targetting a temporary location (a stack slot).
|
|
|
|
// NOTE: there is a choice here between constantly creating new stack
|
|
// slots and always reusing the same one. We currently always create
|
|
// new ones, as reuse may inhibit scheduling.
|
|
const Type *Ty = MVT::getTypeForValueType(ExtraVT);
|
|
unsigned TySize = (unsigned)TLI.getTargetData().getTypeSize(Ty);
|
|
unsigned Align = TLI.getTargetData().getTypeAlignment(Ty);
|
|
MachineFunction &MF = DAG.getMachineFunction();
|
|
int SSFI =
|
|
MF.getFrameInfo()->CreateStackObject((unsigned)TySize, Align);
|
|
SDOperand StackSlot = DAG.getFrameIndex(SSFI, TLI.getPointerTy());
|
|
Result = DAG.getNode(ISD::TRUNCSTORE, MVT::Other, DAG.getEntryNode(),
|
|
Node->getOperand(0), StackSlot,
|
|
DAG.getSrcValue(NULL), DAG.getValueType(ExtraVT));
|
|
Result = DAG.getExtLoad(ISD::EXTLOAD, Node->getValueType(0),
|
|
Result, StackSlot, DAG.getSrcValue(NULL),
|
|
ExtraVT);
|
|
} else {
|
|
assert(0 && "Unknown op");
|
|
}
|
|
break;
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
|
|
// Make sure that the generated code is itself legal.
|
|
if (Result != Op)
|
|
Result = LegalizeOp(Result);
|
|
|
|
// Note that LegalizeOp may be reentered even from single-use nodes, which
|
|
// means that we always must cache transformed nodes.
|
|
AddLegalizedOperand(Op, Result);
|
|
return Result;
|
|
}
|
|
|
|
/// PromoteOp - Given an operation that produces a value in an invalid type,
|
|
/// promote it to compute the value into a larger type. The produced value will
|
|
/// have the correct bits for the low portion of the register, but no guarantee
|
|
/// is made about the top bits: it may be zero, sign-extended, or garbage.
|
|
SDOperand SelectionDAGLegalize::PromoteOp(SDOperand Op) {
|
|
MVT::ValueType VT = Op.getValueType();
|
|
MVT::ValueType NVT = TLI.getTypeToTransformTo(VT);
|
|
assert(getTypeAction(VT) == Promote &&
|
|
"Caller should expand or legalize operands that are not promotable!");
|
|
assert(NVT > VT && MVT::isInteger(NVT) == MVT::isInteger(VT) &&
|
|
"Cannot promote to smaller type!");
|
|
|
|
SDOperand Tmp1, Tmp2, Tmp3;
|
|
SDOperand Result;
|
|
SDNode *Node = Op.Val;
|
|
|
|
std::map<SDOperand, SDOperand>::iterator I = PromotedNodes.find(Op);
|
|
if (I != PromotedNodes.end()) return I->second;
|
|
|
|
switch (Node->getOpcode()) {
|
|
case ISD::CopyFromReg:
|
|
assert(0 && "CopyFromReg must be legal!");
|
|
default:
|
|
std::cerr << "NODE: "; Node->dump(); std::cerr << "\n";
|
|
assert(0 && "Do not know how to promote this operator!");
|
|
abort();
|
|
case ISD::UNDEF:
|
|
Result = DAG.getNode(ISD::UNDEF, NVT);
|
|
break;
|
|
case ISD::Constant:
|
|
if (VT != MVT::i1)
|
|
Result = DAG.getNode(ISD::SIGN_EXTEND, NVT, Op);
|
|
else
|
|
Result = DAG.getNode(ISD::ZERO_EXTEND, NVT, Op);
|
|
assert(isa<ConstantSDNode>(Result) && "Didn't constant fold zext?");
|
|
break;
|
|
case ISD::ConstantFP:
|
|
Result = DAG.getNode(ISD::FP_EXTEND, NVT, Op);
|
|
assert(isa<ConstantFPSDNode>(Result) && "Didn't constant fold fp_extend?");
|
|
break;
|
|
|
|
case ISD::SETCC:
|
|
assert(isTypeLegal(TLI.getSetCCResultTy()) && "SetCC type is not legal??");
|
|
Result = DAG.getNode(ISD::SETCC, TLI.getSetCCResultTy(),Node->getOperand(0),
|
|
Node->getOperand(1), Node->getOperand(2));
|
|
break;
|
|
|
|
case ISD::TRUNCATE:
|
|
switch (getTypeAction(Node->getOperand(0).getValueType())) {
|
|
case Legal:
|
|
Result = LegalizeOp(Node->getOperand(0));
|
|
assert(Result.getValueType() >= NVT &&
|
|
"This truncation doesn't make sense!");
|
|
if (Result.getValueType() > NVT) // Truncate to NVT instead of VT
|
|
Result = DAG.getNode(ISD::TRUNCATE, NVT, Result);
|
|
break;
|
|
case Promote:
|
|
// The truncation is not required, because we don't guarantee anything
|
|
// about high bits anyway.
|
|
Result = PromoteOp(Node->getOperand(0));
|
|
break;
|
|
case Expand:
|
|
ExpandOp(Node->getOperand(0), Tmp1, Tmp2);
|
|
// Truncate the low part of the expanded value to the result type
|
|
Result = DAG.getNode(ISD::TRUNCATE, NVT, Tmp1);
|
|
}
|
|
break;
|
|
case ISD::SIGN_EXTEND:
|
|
case ISD::ZERO_EXTEND:
|
|
case ISD::ANY_EXTEND:
|
|
switch (getTypeAction(Node->getOperand(0).getValueType())) {
|
|
case Expand: assert(0 && "BUG: Smaller reg should have been promoted!");
|
|
case Legal:
|
|
// Input is legal? Just do extend all the way to the larger type.
|
|
Result = DAG.getNode(Node->getOpcode(), NVT, Node->getOperand(0));
|
|
break;
|
|
case Promote:
|
|
// Promote the reg if it's smaller.
|
|
Result = PromoteOp(Node->getOperand(0));
|
|
// The high bits are not guaranteed to be anything. Insert an extend.
|
|
if (Node->getOpcode() == ISD::SIGN_EXTEND)
|
|
Result = DAG.getNode(ISD::SIGN_EXTEND_INREG, NVT, Result,
|
|
DAG.getValueType(Node->getOperand(0).getValueType()));
|
|
else if (Node->getOpcode() == ISD::ZERO_EXTEND)
|
|
Result = DAG.getZeroExtendInReg(Result,
|
|
Node->getOperand(0).getValueType());
|
|
break;
|
|
}
|
|
break;
|
|
case ISD::BIT_CONVERT:
|
|
Result = ExpandBIT_CONVERT(Node->getValueType(0), Node->getOperand(0));
|
|
Result = PromoteOp(Result);
|
|
break;
|
|
|
|
case ISD::FP_EXTEND:
|
|
assert(0 && "Case not implemented. Dynamically dead with 2 FP types!");
|
|
case ISD::FP_ROUND:
|
|
switch (getTypeAction(Node->getOperand(0).getValueType())) {
|
|
case Expand: assert(0 && "BUG: Cannot expand FP regs!");
|
|
case Promote: assert(0 && "Unreachable with 2 FP types!");
|
|
case Legal:
|
|
// Input is legal? Do an FP_ROUND_INREG.
|
|
Result = DAG.getNode(ISD::FP_ROUND_INREG, NVT, Node->getOperand(0),
|
|
DAG.getValueType(VT));
|
|
break;
|
|
}
|
|
break;
|
|
|
|
case ISD::SINT_TO_FP:
|
|
case ISD::UINT_TO_FP:
|
|
switch (getTypeAction(Node->getOperand(0).getValueType())) {
|
|
case Legal:
|
|
// No extra round required here.
|
|
Result = DAG.getNode(Node->getOpcode(), NVT, Node->getOperand(0));
|
|
break;
|
|
|
|
case Promote:
|
|
Result = PromoteOp(Node->getOperand(0));
|
|
if (Node->getOpcode() == ISD::SINT_TO_FP)
|
|
Result = DAG.getNode(ISD::SIGN_EXTEND_INREG, Result.getValueType(),
|
|
Result,
|
|
DAG.getValueType(Node->getOperand(0).getValueType()));
|
|
else
|
|
Result = DAG.getZeroExtendInReg(Result,
|
|
Node->getOperand(0).getValueType());
|
|
// No extra round required here.
|
|
Result = DAG.getNode(Node->getOpcode(), NVT, Result);
|
|
break;
|
|
case Expand:
|
|
Result = ExpandIntToFP(Node->getOpcode() == ISD::SINT_TO_FP, NVT,
|
|
Node->getOperand(0));
|
|
// Round if we cannot tolerate excess precision.
|
|
if (NoExcessFPPrecision)
|
|
Result = DAG.getNode(ISD::FP_ROUND_INREG, NVT, Result,
|
|
DAG.getValueType(VT));
|
|
break;
|
|
}
|
|
break;
|
|
|
|
case ISD::SIGN_EXTEND_INREG:
|
|
Result = PromoteOp(Node->getOperand(0));
|
|
Result = DAG.getNode(ISD::SIGN_EXTEND_INREG, NVT, Result,
|
|
Node->getOperand(1));
|
|
break;
|
|
case ISD::FP_TO_SINT:
|
|
case ISD::FP_TO_UINT:
|
|
switch (getTypeAction(Node->getOperand(0).getValueType())) {
|
|
case Legal:
|
|
Tmp1 = Node->getOperand(0);
|
|
break;
|
|
case Promote:
|
|
// The input result is prerounded, so we don't have to do anything
|
|
// special.
|
|
Tmp1 = PromoteOp(Node->getOperand(0));
|
|
break;
|
|
case Expand:
|
|
assert(0 && "not implemented");
|
|
}
|
|
// If we're promoting a UINT to a larger size, check to see if the new node
|
|
// will be legal. If it isn't, check to see if FP_TO_SINT is legal, since
|
|
// we can use that instead. This allows us to generate better code for
|
|
// FP_TO_UINT for small destination sizes on targets where FP_TO_UINT is not
|
|
// legal, such as PowerPC.
|
|
if (Node->getOpcode() == ISD::FP_TO_UINT &&
|
|
!TLI.isOperationLegal(ISD::FP_TO_UINT, NVT) &&
|
|
(TLI.isOperationLegal(ISD::FP_TO_SINT, NVT) ||
|
|
TLI.getOperationAction(ISD::FP_TO_SINT, NVT)==TargetLowering::Custom)){
|
|
Result = DAG.getNode(ISD::FP_TO_SINT, NVT, Tmp1);
|
|
} else {
|
|
Result = DAG.getNode(Node->getOpcode(), NVT, Tmp1);
|
|
}
|
|
break;
|
|
|
|
case ISD::FABS:
|
|
case ISD::FNEG:
|
|
Tmp1 = PromoteOp(Node->getOperand(0));
|
|
assert(Tmp1.getValueType() == NVT);
|
|
Result = DAG.getNode(Node->getOpcode(), NVT, Tmp1);
|
|
// NOTE: we do not have to do any extra rounding here for
|
|
// NoExcessFPPrecision, because we know the input will have the appropriate
|
|
// precision, and these operations don't modify precision at all.
|
|
break;
|
|
|
|
case ISD::FSQRT:
|
|
case ISD::FSIN:
|
|
case ISD::FCOS:
|
|
Tmp1 = PromoteOp(Node->getOperand(0));
|
|
assert(Tmp1.getValueType() == NVT);
|
|
Result = DAG.getNode(Node->getOpcode(), NVT, Tmp1);
|
|
if (NoExcessFPPrecision)
|
|
Result = DAG.getNode(ISD::FP_ROUND_INREG, NVT, Result,
|
|
DAG.getValueType(VT));
|
|
break;
|
|
|
|
case ISD::AND:
|
|
case ISD::OR:
|
|
case ISD::XOR:
|
|
case ISD::ADD:
|
|
case ISD::SUB:
|
|
case ISD::MUL:
|
|
// The input may have strange things in the top bits of the registers, but
|
|
// these operations don't care. They may have weird bits going out, but
|
|
// that too is okay if they are integer operations.
|
|
Tmp1 = PromoteOp(Node->getOperand(0));
|
|
Tmp2 = PromoteOp(Node->getOperand(1));
|
|
assert(Tmp1.getValueType() == NVT && Tmp2.getValueType() == NVT);
|
|
Result = DAG.getNode(Node->getOpcode(), NVT, Tmp1, Tmp2);
|
|
break;
|
|
case ISD::FADD:
|
|
case ISD::FSUB:
|
|
case ISD::FMUL:
|
|
Tmp1 = PromoteOp(Node->getOperand(0));
|
|
Tmp2 = PromoteOp(Node->getOperand(1));
|
|
assert(Tmp1.getValueType() == NVT && Tmp2.getValueType() == NVT);
|
|
Result = DAG.getNode(Node->getOpcode(), NVT, Tmp1, Tmp2);
|
|
|
|
// Floating point operations will give excess precision that we may not be
|
|
// able to tolerate. If we DO allow excess precision, just leave it,
|
|
// otherwise excise it.
|
|
// FIXME: Why would we need to round FP ops more than integer ones?
|
|
// Is Round(Add(Add(A,B),C)) != Round(Add(Round(Add(A,B)), C))
|
|
if (NoExcessFPPrecision)
|
|
Result = DAG.getNode(ISD::FP_ROUND_INREG, NVT, Result,
|
|
DAG.getValueType(VT));
|
|
break;
|
|
|
|
case ISD::SDIV:
|
|
case ISD::SREM:
|
|
// These operators require that their input be sign extended.
|
|
Tmp1 = PromoteOp(Node->getOperand(0));
|
|
Tmp2 = PromoteOp(Node->getOperand(1));
|
|
if (MVT::isInteger(NVT)) {
|
|
Tmp1 = DAG.getNode(ISD::SIGN_EXTEND_INREG, NVT, Tmp1,
|
|
DAG.getValueType(VT));
|
|
Tmp2 = DAG.getNode(ISD::SIGN_EXTEND_INREG, NVT, Tmp2,
|
|
DAG.getValueType(VT));
|
|
}
|
|
Result = DAG.getNode(Node->getOpcode(), NVT, Tmp1, Tmp2);
|
|
|
|
// Perform FP_ROUND: this is probably overly pessimistic.
|
|
if (MVT::isFloatingPoint(NVT) && NoExcessFPPrecision)
|
|
Result = DAG.getNode(ISD::FP_ROUND_INREG, NVT, Result,
|
|
DAG.getValueType(VT));
|
|
break;
|
|
case ISD::FDIV:
|
|
case ISD::FREM:
|
|
case ISD::FCOPYSIGN:
|
|
// These operators require that their input be fp extended.
|
|
Tmp1 = PromoteOp(Node->getOperand(0));
|
|
Tmp2 = PromoteOp(Node->getOperand(1));
|
|
Result = DAG.getNode(Node->getOpcode(), NVT, Tmp1, Tmp2);
|
|
|
|
// Perform FP_ROUND: this is probably overly pessimistic.
|
|
if (NoExcessFPPrecision && Node->getOpcode() != ISD::FCOPYSIGN)
|
|
Result = DAG.getNode(ISD::FP_ROUND_INREG, NVT, Result,
|
|
DAG.getValueType(VT));
|
|
break;
|
|
|
|
case ISD::UDIV:
|
|
case ISD::UREM:
|
|
// These operators require that their input be zero extended.
|
|
Tmp1 = PromoteOp(Node->getOperand(0));
|
|
Tmp2 = PromoteOp(Node->getOperand(1));
|
|
assert(MVT::isInteger(NVT) && "Operators don't apply to FP!");
|
|
Tmp1 = DAG.getZeroExtendInReg(Tmp1, VT);
|
|
Tmp2 = DAG.getZeroExtendInReg(Tmp2, VT);
|
|
Result = DAG.getNode(Node->getOpcode(), NVT, Tmp1, Tmp2);
|
|
break;
|
|
|
|
case ISD::SHL:
|
|
Tmp1 = PromoteOp(Node->getOperand(0));
|
|
Result = DAG.getNode(ISD::SHL, NVT, Tmp1, Node->getOperand(1));
|
|
break;
|
|
case ISD::SRA:
|
|
// The input value must be properly sign extended.
|
|
Tmp1 = PromoteOp(Node->getOperand(0));
|
|
Tmp1 = DAG.getNode(ISD::SIGN_EXTEND_INREG, NVT, Tmp1,
|
|
DAG.getValueType(VT));
|
|
Result = DAG.getNode(ISD::SRA, NVT, Tmp1, Node->getOperand(1));
|
|
break;
|
|
case ISD::SRL:
|
|
// The input value must be properly zero extended.
|
|
Tmp1 = PromoteOp(Node->getOperand(0));
|
|
Tmp1 = DAG.getZeroExtendInReg(Tmp1, VT);
|
|
Result = DAG.getNode(ISD::SRL, NVT, Tmp1, Node->getOperand(1));
|
|
break;
|
|
|
|
case ISD::VAARG:
|
|
Tmp1 = Node->getOperand(0); // Get the chain.
|
|
Tmp2 = Node->getOperand(1); // Get the pointer.
|
|
if (TLI.getOperationAction(ISD::VAARG, VT) == TargetLowering::Custom) {
|
|
Tmp3 = DAG.getVAArg(VT, Tmp1, Tmp2, Node->getOperand(2));
|
|
Result = TLI.CustomPromoteOperation(Tmp3, DAG);
|
|
} else {
|
|
SDOperand VAList = DAG.getLoad(TLI.getPointerTy(), Tmp1, Tmp2,
|
|
Node->getOperand(2));
|
|
// Increment the pointer, VAList, to the next vaarg
|
|
Tmp3 = DAG.getNode(ISD::ADD, TLI.getPointerTy(), VAList,
|
|
DAG.getConstant(MVT::getSizeInBits(VT)/8,
|
|
TLI.getPointerTy()));
|
|
// Store the incremented VAList to the legalized pointer
|
|
Tmp3 = DAG.getNode(ISD::STORE, MVT::Other, VAList.getValue(1), Tmp3, Tmp2,
|
|
Node->getOperand(2));
|
|
// Load the actual argument out of the pointer VAList
|
|
Result = DAG.getExtLoad(ISD::EXTLOAD, NVT, Tmp3, VAList,
|
|
DAG.getSrcValue(0), VT);
|
|
}
|
|
// Remember that we legalized the chain.
|
|
AddLegalizedOperand(Op.getValue(1), LegalizeOp(Result.getValue(1)));
|
|
break;
|
|
|
|
case ISD::LOAD:
|
|
Result = DAG.getExtLoad(ISD::EXTLOAD, NVT, Node->getOperand(0),
|
|
Node->getOperand(1), Node->getOperand(2), VT);
|
|
// Remember that we legalized the chain.
|
|
AddLegalizedOperand(Op.getValue(1), LegalizeOp(Result.getValue(1)));
|
|
break;
|
|
case ISD::SEXTLOAD:
|
|
case ISD::ZEXTLOAD:
|
|
case ISD::EXTLOAD:
|
|
Result = DAG.getExtLoad(Node->getOpcode(), NVT, Node->getOperand(0),
|
|
Node->getOperand(1), Node->getOperand(2),
|
|
cast<VTSDNode>(Node->getOperand(3))->getVT());
|
|
// Remember that we legalized the chain.
|
|
AddLegalizedOperand(Op.getValue(1), LegalizeOp(Result.getValue(1)));
|
|
break;
|
|
case ISD::SELECT:
|
|
Tmp2 = PromoteOp(Node->getOperand(1)); // Legalize the op0
|
|
Tmp3 = PromoteOp(Node->getOperand(2)); // Legalize the op1
|
|
Result = DAG.getNode(ISD::SELECT, NVT, Node->getOperand(0), Tmp2, Tmp3);
|
|
break;
|
|
case ISD::SELECT_CC:
|
|
Tmp2 = PromoteOp(Node->getOperand(2)); // True
|
|
Tmp3 = PromoteOp(Node->getOperand(3)); // False
|
|
Result = DAG.getNode(ISD::SELECT_CC, NVT, Node->getOperand(0),
|
|
Node->getOperand(1), Tmp2, Tmp3, Node->getOperand(4));
|
|
break;
|
|
case ISD::BSWAP:
|
|
Tmp1 = Node->getOperand(0);
|
|
Tmp1 = DAG.getNode(ISD::ZERO_EXTEND, NVT, Tmp1);
|
|
Tmp1 = DAG.getNode(ISD::BSWAP, NVT, Tmp1);
|
|
Result = DAG.getNode(ISD::SRL, NVT, Tmp1,
|
|
DAG.getConstant(getSizeInBits(NVT) - getSizeInBits(VT),
|
|
TLI.getShiftAmountTy()));
|
|
break;
|
|
case ISD::CTPOP:
|
|
case ISD::CTTZ:
|
|
case ISD::CTLZ:
|
|
// Zero extend the argument
|
|
Tmp1 = DAG.getNode(ISD::ZERO_EXTEND, NVT, Node->getOperand(0));
|
|
// Perform the larger operation, then subtract if needed.
|
|
Tmp1 = DAG.getNode(Node->getOpcode(), NVT, Tmp1);
|
|
switch(Node->getOpcode()) {
|
|
case ISD::CTPOP:
|
|
Result = Tmp1;
|
|
break;
|
|
case ISD::CTTZ:
|
|
// if Tmp1 == sizeinbits(NVT) then Tmp1 = sizeinbits(Old VT)
|
|
Tmp2 = DAG.getSetCC(TLI.getSetCCResultTy(), Tmp1,
|
|
DAG.getConstant(getSizeInBits(NVT), NVT), ISD::SETEQ);
|
|
Result = DAG.getNode(ISD::SELECT, NVT, Tmp2,
|
|
DAG.getConstant(getSizeInBits(VT), NVT), Tmp1);
|
|
break;
|
|
case ISD::CTLZ:
|
|
//Tmp1 = Tmp1 - (sizeinbits(NVT) - sizeinbits(Old VT))
|
|
Result = DAG.getNode(ISD::SUB, NVT, Tmp1,
|
|
DAG.getConstant(getSizeInBits(NVT) -
|
|
getSizeInBits(VT), NVT));
|
|
break;
|
|
}
|
|
break;
|
|
}
|
|
|
|
assert(Result.Val && "Didn't set a result!");
|
|
|
|
// Make sure the result is itself legal.
|
|
Result = LegalizeOp(Result);
|
|
|
|
// Remember that we promoted this!
|
|
AddPromotedOperand(Op, Result);
|
|
return Result;
|
|
}
|
|
|
|
/// LegalizeSetCCOperands - Attempts to create a legal LHS and RHS for a SETCC
|
|
/// with condition CC on the current target. This usually involves legalizing
|
|
/// or promoting the arguments. In the case where LHS and RHS must be expanded,
|
|
/// there may be no choice but to create a new SetCC node to represent the
|
|
/// legalized value of setcc lhs, rhs. In this case, the value is returned in
|
|
/// LHS, and the SDOperand returned in RHS has a nil SDNode value.
|
|
void SelectionDAGLegalize::LegalizeSetCCOperands(SDOperand &LHS,
|
|
SDOperand &RHS,
|
|
SDOperand &CC) {
|
|
SDOperand Tmp1, Tmp2, Result;
|
|
|
|
switch (getTypeAction(LHS.getValueType())) {
|
|
case Legal:
|
|
Tmp1 = LegalizeOp(LHS); // LHS
|
|
Tmp2 = LegalizeOp(RHS); // RHS
|
|
break;
|
|
case Promote:
|
|
Tmp1 = PromoteOp(LHS); // LHS
|
|
Tmp2 = PromoteOp(RHS); // RHS
|
|
|
|
// If this is an FP compare, the operands have already been extended.
|
|
if (MVT::isInteger(LHS.getValueType())) {
|
|
MVT::ValueType VT = LHS.getValueType();
|
|
MVT::ValueType NVT = TLI.getTypeToTransformTo(VT);
|
|
|
|
// Otherwise, we have to insert explicit sign or zero extends. Note
|
|
// that we could insert sign extends for ALL conditions, but zero extend
|
|
// is cheaper on many machines (an AND instead of two shifts), so prefer
|
|
// it.
|
|
switch (cast<CondCodeSDNode>(CC)->get()) {
|
|
default: assert(0 && "Unknown integer comparison!");
|
|
case ISD::SETEQ:
|
|
case ISD::SETNE:
|
|
case ISD::SETUGE:
|
|
case ISD::SETUGT:
|
|
case ISD::SETULE:
|
|
case ISD::SETULT:
|
|
// ALL of these operations will work if we either sign or zero extend
|
|
// the operands (including the unsigned comparisons!). Zero extend is
|
|
// usually a simpler/cheaper operation, so prefer it.
|
|
Tmp1 = DAG.getZeroExtendInReg(Tmp1, VT);
|
|
Tmp2 = DAG.getZeroExtendInReg(Tmp2, VT);
|
|
break;
|
|
case ISD::SETGE:
|
|
case ISD::SETGT:
|
|
case ISD::SETLT:
|
|
case ISD::SETLE:
|
|
Tmp1 = DAG.getNode(ISD::SIGN_EXTEND_INREG, NVT, Tmp1,
|
|
DAG.getValueType(VT));
|
|
Tmp2 = DAG.getNode(ISD::SIGN_EXTEND_INREG, NVT, Tmp2,
|
|
DAG.getValueType(VT));
|
|
break;
|
|
}
|
|
}
|
|
break;
|
|
case Expand:
|
|
SDOperand LHSLo, LHSHi, RHSLo, RHSHi;
|
|
ExpandOp(LHS, LHSLo, LHSHi);
|
|
ExpandOp(RHS, RHSLo, RHSHi);
|
|
switch (cast<CondCodeSDNode>(CC)->get()) {
|
|
case ISD::SETEQ:
|
|
case ISD::SETNE:
|
|
if (RHSLo == RHSHi)
|
|
if (ConstantSDNode *RHSCST = dyn_cast<ConstantSDNode>(RHSLo))
|
|
if (RHSCST->isAllOnesValue()) {
|
|
// Comparison to -1.
|
|
Tmp1 = DAG.getNode(ISD::AND, LHSLo.getValueType(), LHSLo, LHSHi);
|
|
Tmp2 = RHSLo;
|
|
break;
|
|
}
|
|
|
|
Tmp1 = DAG.getNode(ISD::XOR, LHSLo.getValueType(), LHSLo, RHSLo);
|
|
Tmp2 = DAG.getNode(ISD::XOR, LHSLo.getValueType(), LHSHi, RHSHi);
|
|
Tmp1 = DAG.getNode(ISD::OR, Tmp1.getValueType(), Tmp1, Tmp2);
|
|
Tmp2 = DAG.getConstant(0, Tmp1.getValueType());
|
|
break;
|
|
default:
|
|
// If this is a comparison of the sign bit, just look at the top part.
|
|
// X > -1, x < 0
|
|
if (ConstantSDNode *CST = dyn_cast<ConstantSDNode>(RHS))
|
|
if ((cast<CondCodeSDNode>(CC)->get() == ISD::SETLT &&
|
|
CST->getValue() == 0) || // X < 0
|
|
(cast<CondCodeSDNode>(CC)->get() == ISD::SETGT &&
|
|
CST->isAllOnesValue())) { // X > -1
|
|
Tmp1 = LHSHi;
|
|
Tmp2 = RHSHi;
|
|
break;
|
|
}
|
|
|
|
// FIXME: This generated code sucks.
|
|
ISD::CondCode LowCC;
|
|
switch (cast<CondCodeSDNode>(CC)->get()) {
|
|
default: assert(0 && "Unknown integer setcc!");
|
|
case ISD::SETLT:
|
|
case ISD::SETULT: LowCC = ISD::SETULT; break;
|
|
case ISD::SETGT:
|
|
case ISD::SETUGT: LowCC = ISD::SETUGT; break;
|
|
case ISD::SETLE:
|
|
case ISD::SETULE: LowCC = ISD::SETULE; break;
|
|
case ISD::SETGE:
|
|
case ISD::SETUGE: LowCC = ISD::SETUGE; break;
|
|
}
|
|
|
|
// Tmp1 = lo(op1) < lo(op2) // Always unsigned comparison
|
|
// Tmp2 = hi(op1) < hi(op2) // Signedness depends on operands
|
|
// dest = hi(op1) == hi(op2) ? Tmp1 : Tmp2;
|
|
|
|
// NOTE: on targets without efficient SELECT of bools, we can always use
|
|
// this identity: (B1 ? B2 : B3) --> (B1 & B2)|(!B1&B3)
|
|
Tmp1 = DAG.getSetCC(TLI.getSetCCResultTy(), LHSLo, RHSLo, LowCC);
|
|
Tmp2 = DAG.getNode(ISD::SETCC, TLI.getSetCCResultTy(), LHSHi, RHSHi, CC);
|
|
Result = DAG.getSetCC(TLI.getSetCCResultTy(), LHSHi, RHSHi, ISD::SETEQ);
|
|
Result = LegalizeOp(DAG.getNode(ISD::SELECT, Tmp1.getValueType(),
|
|
Result, Tmp1, Tmp2));
|
|
Tmp1 = Result;
|
|
Tmp2 = SDOperand();
|
|
}
|
|
}
|
|
LHS = Tmp1;
|
|
RHS = Tmp2;
|
|
}
|
|
|
|
/// ExpandBIT_CONVERT - Expand a BIT_CONVERT node into a store/load combination.
|
|
/// The resultant code need not be legal. Note that SrcOp is the input operand
|
|
/// to the BIT_CONVERT, not the BIT_CONVERT node itself.
|
|
SDOperand SelectionDAGLegalize::ExpandBIT_CONVERT(MVT::ValueType DestVT,
|
|
SDOperand SrcOp) {
|
|
// Create the stack frame object.
|
|
SDOperand FIPtr = CreateStackTemporary(DestVT);
|
|
|
|
// Emit a store to the stack slot.
|
|
SDOperand Store = DAG.getNode(ISD::STORE, MVT::Other, DAG.getEntryNode(),
|
|
SrcOp, FIPtr, DAG.getSrcValue(NULL));
|
|
// Result is a load from the stack slot.
|
|
return DAG.getLoad(DestVT, Store, FIPtr, DAG.getSrcValue(0));
|
|
}
|
|
|
|
/// ExpandBUILD_VECTOR - Expand a BUILD_VECTOR node on targets that don't
|
|
/// support the operation, but do support the resultant packed vector type.
|
|
SDOperand SelectionDAGLegalize::ExpandBUILD_VECTOR(SDNode *Node) {
|
|
|
|
// If the only non-undef value is the low element, turn this into a
|
|
// SCALAR_TO_VECTOR node. If this is { X, X, X, X }, determine X.
|
|
unsigned NumElems = Node->getNumOperands();
|
|
bool isOnlyLowElement = true;
|
|
SDOperand SplatValue = Node->getOperand(0);
|
|
std::map<SDOperand, std::vector<unsigned> > Values;
|
|
Values[SplatValue].push_back(0);
|
|
bool isConstant = true;
|
|
if (!isa<ConstantFPSDNode>(SplatValue) && !isa<ConstantSDNode>(SplatValue) &&
|
|
SplatValue.getOpcode() != ISD::UNDEF)
|
|
isConstant = false;
|
|
|
|
for (unsigned i = 1; i < NumElems; ++i) {
|
|
SDOperand V = Node->getOperand(i);
|
|
std::map<SDOperand, std::vector<unsigned> >::iterator I = Values.find(V);
|
|
if (I != Values.end())
|
|
I->second.push_back(i);
|
|
else
|
|
Values[V].push_back(i);
|
|
if (V.getOpcode() != ISD::UNDEF)
|
|
isOnlyLowElement = false;
|
|
if (SplatValue != V)
|
|
SplatValue = SDOperand(0,0);
|
|
|
|
// If this isn't a constant element or an undef, we can't use a constant
|
|
// pool load.
|
|
if (!isa<ConstantFPSDNode>(V) && !isa<ConstantSDNode>(V) &&
|
|
V.getOpcode() != ISD::UNDEF)
|
|
isConstant = false;
|
|
}
|
|
|
|
if (isOnlyLowElement) {
|
|
// If the low element is an undef too, then this whole things is an undef.
|
|
if (Node->getOperand(0).getOpcode() == ISD::UNDEF)
|
|
return DAG.getNode(ISD::UNDEF, Node->getValueType(0));
|
|
// Otherwise, turn this into a scalar_to_vector node.
|
|
return DAG.getNode(ISD::SCALAR_TO_VECTOR, Node->getValueType(0),
|
|
Node->getOperand(0));
|
|
}
|
|
|
|
// If all elements are constants, create a load from the constant pool.
|
|
if (isConstant) {
|
|
MVT::ValueType VT = Node->getValueType(0);
|
|
const Type *OpNTy =
|
|
MVT::getTypeForValueType(Node->getOperand(0).getValueType());
|
|
std::vector<Constant*> CV;
|
|
for (unsigned i = 0, e = NumElems; i != e; ++i) {
|
|
if (ConstantFPSDNode *V =
|
|
dyn_cast<ConstantFPSDNode>(Node->getOperand(i))) {
|
|
CV.push_back(ConstantFP::get(OpNTy, V->getValue()));
|
|
} else if (ConstantSDNode *V =
|
|
dyn_cast<ConstantSDNode>(Node->getOperand(i))) {
|
|
CV.push_back(ConstantUInt::get(OpNTy, V->getValue()));
|
|
} else {
|
|
assert(Node->getOperand(i).getOpcode() == ISD::UNDEF);
|
|
CV.push_back(UndefValue::get(OpNTy));
|
|
}
|
|
}
|
|
Constant *CP = ConstantPacked::get(CV);
|
|
SDOperand CPIdx = DAG.getConstantPool(CP, TLI.getPointerTy());
|
|
return DAG.getLoad(VT, DAG.getEntryNode(), CPIdx,
|
|
DAG.getSrcValue(NULL));
|
|
}
|
|
|
|
if (SplatValue.Val) { // Splat of one value?
|
|
// Build the shuffle constant vector: <0, 0, 0, 0>
|
|
MVT::ValueType MaskVT =
|
|
MVT::getIntVectorWithNumElements(NumElems);
|
|
SDOperand Zero = DAG.getConstant(0, MVT::getVectorBaseType(MaskVT));
|
|
std::vector<SDOperand> ZeroVec(NumElems, Zero);
|
|
SDOperand SplatMask = DAG.getNode(ISD::BUILD_VECTOR, MaskVT, ZeroVec);
|
|
|
|
// If the target supports VECTOR_SHUFFLE and this shuffle mask, use it.
|
|
if (TLI.isShuffleLegal(Node->getValueType(0), SplatMask)) {
|
|
// Get the splatted value into the low element of a vector register.
|
|
SDOperand LowValVec =
|
|
DAG.getNode(ISD::SCALAR_TO_VECTOR, Node->getValueType(0), SplatValue);
|
|
|
|
// Return shuffle(LowValVec, undef, <0,0,0,0>)
|
|
return DAG.getNode(ISD::VECTOR_SHUFFLE, Node->getValueType(0), LowValVec,
|
|
DAG.getNode(ISD::UNDEF, Node->getValueType(0)),
|
|
SplatMask);
|
|
}
|
|
}
|
|
|
|
// If there are only two unique elements, we may be able to turn this into a
|
|
// vector shuffle.
|
|
if (Values.size() == 2) {
|
|
// Build the shuffle constant vector: e.g. <0, 4, 0, 4>
|
|
MVT::ValueType MaskVT =
|
|
MVT::getIntVectorWithNumElements(NumElems);
|
|
std::vector<SDOperand> MaskVec(NumElems);
|
|
unsigned i = 0;
|
|
for (std::map<SDOperand,std::vector<unsigned> >::iterator I=Values.begin(),
|
|
E = Values.end(); I != E; ++I) {
|
|
for (std::vector<unsigned>::iterator II = I->second.begin(),
|
|
EE = I->second.end(); II != EE; ++II)
|
|
MaskVec[*II] = DAG.getConstant(i, MVT::getVectorBaseType(MaskVT));
|
|
i += NumElems;
|
|
}
|
|
SDOperand ShuffleMask = DAG.getNode(ISD::BUILD_VECTOR, MaskVT, MaskVec);
|
|
|
|
// If the target supports VECTOR_SHUFFLE and this shuffle mask, use it.
|
|
if (TLI.isShuffleLegal(Node->getValueType(0), ShuffleMask) &&
|
|
TLI.isOperationLegal(ISD::SCALAR_TO_VECTOR, Node->getValueType(0))) {
|
|
std::vector<SDOperand> Ops;
|
|
for(std::map<SDOperand,std::vector<unsigned> >::iterator I=Values.begin(),
|
|
E = Values.end(); I != E; ++I) {
|
|
SDOperand Op = DAG.getNode(ISD::SCALAR_TO_VECTOR, Node->getValueType(0),
|
|
I->first);
|
|
Ops.push_back(Op);
|
|
}
|
|
Ops.push_back(ShuffleMask);
|
|
|
|
// Return shuffle(LoValVec, HiValVec, <0,1,0,1>)
|
|
return DAG.getNode(ISD::VECTOR_SHUFFLE, Node->getValueType(0), Ops);
|
|
}
|
|
}
|
|
|
|
// Otherwise, we can't handle this case efficiently. Allocate a sufficiently
|
|
// aligned object on the stack, store each element into it, then load
|
|
// the result as a vector.
|
|
MVT::ValueType VT = Node->getValueType(0);
|
|
// Create the stack frame object.
|
|
SDOperand FIPtr = CreateStackTemporary(VT);
|
|
|
|
// Emit a store of each element to the stack slot.
|
|
std::vector<SDOperand> Stores;
|
|
unsigned TypeByteSize =
|
|
MVT::getSizeInBits(Node->getOperand(0).getValueType())/8;
|
|
unsigned VectorSize = MVT::getSizeInBits(VT)/8;
|
|
// Store (in the right endianness) the elements to memory.
|
|
for (unsigned i = 0, e = Node->getNumOperands(); i != e; ++i) {
|
|
// Ignore undef elements.
|
|
if (Node->getOperand(i).getOpcode() == ISD::UNDEF) continue;
|
|
|
|
unsigned Offset = TypeByteSize*i;
|
|
|
|
SDOperand Idx = DAG.getConstant(Offset, FIPtr.getValueType());
|
|
Idx = DAG.getNode(ISD::ADD, FIPtr.getValueType(), FIPtr, Idx);
|
|
|
|
Stores.push_back(DAG.getNode(ISD::STORE, MVT::Other, DAG.getEntryNode(),
|
|
Node->getOperand(i), Idx,
|
|
DAG.getSrcValue(NULL)));
|
|
}
|
|
|
|
SDOperand StoreChain;
|
|
if (!Stores.empty()) // Not all undef elements?
|
|
StoreChain = DAG.getNode(ISD::TokenFactor, MVT::Other, Stores);
|
|
else
|
|
StoreChain = DAG.getEntryNode();
|
|
|
|
// Result is a load from the stack slot.
|
|
return DAG.getLoad(VT, StoreChain, FIPtr, DAG.getSrcValue(0));
|
|
}
|
|
|
|
/// CreateStackTemporary - Create a stack temporary, suitable for holding the
|
|
/// specified value type.
|
|
SDOperand SelectionDAGLegalize::CreateStackTemporary(MVT::ValueType VT) {
|
|
MachineFrameInfo *FrameInfo = DAG.getMachineFunction().getFrameInfo();
|
|
unsigned ByteSize = MVT::getSizeInBits(VT)/8;
|
|
int FrameIdx = FrameInfo->CreateStackObject(ByteSize, ByteSize);
|
|
return DAG.getFrameIndex(FrameIdx, TLI.getPointerTy());
|
|
}
|
|
|
|
void SelectionDAGLegalize::ExpandShiftParts(unsigned NodeOp,
|
|
SDOperand Op, SDOperand Amt,
|
|
SDOperand &Lo, SDOperand &Hi) {
|
|
// Expand the subcomponents.
|
|
SDOperand LHSL, LHSH;
|
|
ExpandOp(Op, LHSL, LHSH);
|
|
|
|
std::vector<SDOperand> Ops;
|
|
Ops.push_back(LHSL);
|
|
Ops.push_back(LHSH);
|
|
Ops.push_back(Amt);
|
|
std::vector<MVT::ValueType> VTs(2, LHSL.getValueType());
|
|
Lo = DAG.getNode(NodeOp, VTs, Ops);
|
|
Hi = Lo.getValue(1);
|
|
}
|
|
|
|
|
|
/// ExpandShift - Try to find a clever way to expand this shift operation out to
|
|
/// smaller elements. If we can't find a way that is more efficient than a
|
|
/// libcall on this target, return false. Otherwise, return true with the
|
|
/// low-parts expanded into Lo and Hi.
|
|
bool SelectionDAGLegalize::ExpandShift(unsigned Opc, SDOperand Op,SDOperand Amt,
|
|
SDOperand &Lo, SDOperand &Hi) {
|
|
assert((Opc == ISD::SHL || Opc == ISD::SRA || Opc == ISD::SRL) &&
|
|
"This is not a shift!");
|
|
|
|
MVT::ValueType NVT = TLI.getTypeToTransformTo(Op.getValueType());
|
|
SDOperand ShAmt = LegalizeOp(Amt);
|
|
MVT::ValueType ShTy = ShAmt.getValueType();
|
|
unsigned VTBits = MVT::getSizeInBits(Op.getValueType());
|
|
unsigned NVTBits = MVT::getSizeInBits(NVT);
|
|
|
|
// Handle the case when Amt is an immediate. Other cases are currently broken
|
|
// and are disabled.
|
|
if (ConstantSDNode *CN = dyn_cast<ConstantSDNode>(Amt.Val)) {
|
|
unsigned Cst = CN->getValue();
|
|
// Expand the incoming operand to be shifted, so that we have its parts
|
|
SDOperand InL, InH;
|
|
ExpandOp(Op, InL, InH);
|
|
switch(Opc) {
|
|
case ISD::SHL:
|
|
if (Cst > VTBits) {
|
|
Lo = DAG.getConstant(0, NVT);
|
|
Hi = DAG.getConstant(0, NVT);
|
|
} else if (Cst > NVTBits) {
|
|
Lo = DAG.getConstant(0, NVT);
|
|
Hi = DAG.getNode(ISD::SHL, NVT, InL, DAG.getConstant(Cst-NVTBits,ShTy));
|
|
} else if (Cst == NVTBits) {
|
|
Lo = DAG.getConstant(0, NVT);
|
|
Hi = InL;
|
|
} else {
|
|
Lo = DAG.getNode(ISD::SHL, NVT, InL, DAG.getConstant(Cst, ShTy));
|
|
Hi = DAG.getNode(ISD::OR, NVT,
|
|
DAG.getNode(ISD::SHL, NVT, InH, DAG.getConstant(Cst, ShTy)),
|
|
DAG.getNode(ISD::SRL, NVT, InL, DAG.getConstant(NVTBits-Cst, ShTy)));
|
|
}
|
|
return true;
|
|
case ISD::SRL:
|
|
if (Cst > VTBits) {
|
|
Lo = DAG.getConstant(0, NVT);
|
|
Hi = DAG.getConstant(0, NVT);
|
|
} else if (Cst > NVTBits) {
|
|
Lo = DAG.getNode(ISD::SRL, NVT, InH, DAG.getConstant(Cst-NVTBits,ShTy));
|
|
Hi = DAG.getConstant(0, NVT);
|
|
} else if (Cst == NVTBits) {
|
|
Lo = InH;
|
|
Hi = DAG.getConstant(0, NVT);
|
|
} else {
|
|
Lo = DAG.getNode(ISD::OR, NVT,
|
|
DAG.getNode(ISD::SRL, NVT, InL, DAG.getConstant(Cst, ShTy)),
|
|
DAG.getNode(ISD::SHL, NVT, InH, DAG.getConstant(NVTBits-Cst, ShTy)));
|
|
Hi = DAG.getNode(ISD::SRL, NVT, InH, DAG.getConstant(Cst, ShTy));
|
|
}
|
|
return true;
|
|
case ISD::SRA:
|
|
if (Cst > VTBits) {
|
|
Hi = Lo = DAG.getNode(ISD::SRA, NVT, InH,
|
|
DAG.getConstant(NVTBits-1, ShTy));
|
|
} else if (Cst > NVTBits) {
|
|
Lo = DAG.getNode(ISD::SRA, NVT, InH,
|
|
DAG.getConstant(Cst-NVTBits, ShTy));
|
|
Hi = DAG.getNode(ISD::SRA, NVT, InH,
|
|
DAG.getConstant(NVTBits-1, ShTy));
|
|
} else if (Cst == NVTBits) {
|
|
Lo = InH;
|
|
Hi = DAG.getNode(ISD::SRA, NVT, InH,
|
|
DAG.getConstant(NVTBits-1, ShTy));
|
|
} else {
|
|
Lo = DAG.getNode(ISD::OR, NVT,
|
|
DAG.getNode(ISD::SRL, NVT, InL, DAG.getConstant(Cst, ShTy)),
|
|
DAG.getNode(ISD::SHL, NVT, InH, DAG.getConstant(NVTBits-Cst, ShTy)));
|
|
Hi = DAG.getNode(ISD::SRA, NVT, InH, DAG.getConstant(Cst, ShTy));
|
|
}
|
|
return true;
|
|
}
|
|
}
|
|
return false;
|
|
}
|
|
|
|
|
|
// ExpandLibCall - Expand a node into a call to a libcall. If the result value
|
|
// does not fit into a register, return the lo part and set the hi part to the
|
|
// by-reg argument. If it does fit into a single register, return the result
|
|
// and leave the Hi part unset.
|
|
SDOperand SelectionDAGLegalize::ExpandLibCall(const char *Name, SDNode *Node,
|
|
SDOperand &Hi) {
|
|
assert(!IsLegalizingCall && "Cannot overlap legalization of calls!");
|
|
// The input chain to this libcall is the entry node of the function.
|
|
// Legalizing the call will automatically add the previous call to the
|
|
// dependence.
|
|
SDOperand InChain = DAG.getEntryNode();
|
|
|
|
TargetLowering::ArgListTy Args;
|
|
for (unsigned i = 0, e = Node->getNumOperands(); i != e; ++i) {
|
|
MVT::ValueType ArgVT = Node->getOperand(i).getValueType();
|
|
const Type *ArgTy = MVT::getTypeForValueType(ArgVT);
|
|
Args.push_back(std::make_pair(Node->getOperand(i), ArgTy));
|
|
}
|
|
SDOperand Callee = DAG.getExternalSymbol(Name, TLI.getPointerTy());
|
|
|
|
// Splice the libcall in wherever FindInputOutputChains tells us to.
|
|
const Type *RetTy = MVT::getTypeForValueType(Node->getValueType(0));
|
|
std::pair<SDOperand,SDOperand> CallInfo =
|
|
TLI.LowerCallTo(InChain, RetTy, false, CallingConv::C, false,
|
|
Callee, Args, DAG);
|
|
|
|
// Legalize the call sequence, starting with the chain. This will advance
|
|
// the LastCALLSEQ_END to the legalized version of the CALLSEQ_END node that
|
|
// was added by LowerCallTo (guaranteeing proper serialization of calls).
|
|
LegalizeOp(CallInfo.second);
|
|
SDOperand Result;
|
|
switch (getTypeAction(CallInfo.first.getValueType())) {
|
|
default: assert(0 && "Unknown thing");
|
|
case Legal:
|
|
Result = CallInfo.first;
|
|
break;
|
|
case Expand:
|
|
ExpandOp(CallInfo.first, Result, Hi);
|
|
break;
|
|
}
|
|
return Result;
|
|
}
|
|
|
|
|
|
/// ExpandIntToFP - Expand a [US]INT_TO_FP operation, assuming that the
|
|
/// destination type is legal.
|
|
SDOperand SelectionDAGLegalize::
|
|
ExpandIntToFP(bool isSigned, MVT::ValueType DestTy, SDOperand Source) {
|
|
assert(isTypeLegal(DestTy) && "Destination type is not legal!");
|
|
assert(getTypeAction(Source.getValueType()) == Expand &&
|
|
"This is not an expansion!");
|
|
assert(Source.getValueType() == MVT::i64 && "Only handle expand from i64!");
|
|
|
|
if (!isSigned) {
|
|
assert(Source.getValueType() == MVT::i64 &&
|
|
"This only works for 64-bit -> FP");
|
|
// The 64-bit value loaded will be incorrectly if the 'sign bit' of the
|
|
// incoming integer is set. To handle this, we dynamically test to see if
|
|
// it is set, and, if so, add a fudge factor.
|
|
SDOperand Lo, Hi;
|
|
ExpandOp(Source, Lo, Hi);
|
|
|
|
// If this is unsigned, and not supported, first perform the conversion to
|
|
// signed, then adjust the result if the sign bit is set.
|
|
SDOperand SignedConv = ExpandIntToFP(true, DestTy,
|
|
DAG.getNode(ISD::BUILD_PAIR, Source.getValueType(), Lo, Hi));
|
|
|
|
SDOperand SignSet = DAG.getSetCC(TLI.getSetCCResultTy(), Hi,
|
|
DAG.getConstant(0, Hi.getValueType()),
|
|
ISD::SETLT);
|
|
SDOperand Zero = getIntPtrConstant(0), Four = getIntPtrConstant(4);
|
|
SDOperand CstOffset = DAG.getNode(ISD::SELECT, Zero.getValueType(),
|
|
SignSet, Four, Zero);
|
|
uint64_t FF = 0x5f800000ULL;
|
|
if (TLI.isLittleEndian()) FF <<= 32;
|
|
static Constant *FudgeFactor = ConstantUInt::get(Type::ULongTy, FF);
|
|
|
|
SDOperand CPIdx = DAG.getConstantPool(FudgeFactor, TLI.getPointerTy());
|
|
CPIdx = DAG.getNode(ISD::ADD, TLI.getPointerTy(), CPIdx, CstOffset);
|
|
SDOperand FudgeInReg;
|
|
if (DestTy == MVT::f32)
|
|
FudgeInReg = DAG.getLoad(MVT::f32, DAG.getEntryNode(), CPIdx,
|
|
DAG.getSrcValue(NULL));
|
|
else {
|
|
assert(DestTy == MVT::f64 && "Unexpected conversion");
|
|
FudgeInReg = DAG.getExtLoad(ISD::EXTLOAD, MVT::f64, DAG.getEntryNode(),
|
|
CPIdx, DAG.getSrcValue(NULL), MVT::f32);
|
|
}
|
|
return DAG.getNode(ISD::FADD, DestTy, SignedConv, FudgeInReg);
|
|
}
|
|
|
|
// Check to see if the target has a custom way to lower this. If so, use it.
|
|
switch (TLI.getOperationAction(ISD::SINT_TO_FP, Source.getValueType())) {
|
|
default: assert(0 && "This action not implemented for this operation!");
|
|
case TargetLowering::Legal:
|
|
case TargetLowering::Expand:
|
|
break; // This case is handled below.
|
|
case TargetLowering::Custom: {
|
|
SDOperand NV = TLI.LowerOperation(DAG.getNode(ISD::SINT_TO_FP, DestTy,
|
|
Source), DAG);
|
|
if (NV.Val)
|
|
return LegalizeOp(NV);
|
|
break; // The target decided this was legal after all
|
|
}
|
|
}
|
|
|
|
// Expand the source, then glue it back together for the call. We must expand
|
|
// the source in case it is shared (this pass of legalize must traverse it).
|
|
SDOperand SrcLo, SrcHi;
|
|
ExpandOp(Source, SrcLo, SrcHi);
|
|
Source = DAG.getNode(ISD::BUILD_PAIR, Source.getValueType(), SrcLo, SrcHi);
|
|
|
|
const char *FnName = 0;
|
|
if (DestTy == MVT::f32)
|
|
FnName = "__floatdisf";
|
|
else {
|
|
assert(DestTy == MVT::f64 && "Unknown fp value type!");
|
|
FnName = "__floatdidf";
|
|
}
|
|
|
|
Source = DAG.getNode(ISD::SINT_TO_FP, DestTy, Source);
|
|
SDOperand UnusedHiPart;
|
|
return ExpandLibCall(FnName, Source.Val, UnusedHiPart);
|
|
}
|
|
|
|
/// ExpandLegalINT_TO_FP - This function is responsible for legalizing a
|
|
/// INT_TO_FP operation of the specified operand when the target requests that
|
|
/// we expand it. At this point, we know that the result and operand types are
|
|
/// legal for the target.
|
|
SDOperand SelectionDAGLegalize::ExpandLegalINT_TO_FP(bool isSigned,
|
|
SDOperand Op0,
|
|
MVT::ValueType DestVT) {
|
|
if (Op0.getValueType() == MVT::i32) {
|
|
// simple 32-bit [signed|unsigned] integer to float/double expansion
|
|
|
|
// get the stack frame index of a 8 byte buffer
|
|
MachineFunction &MF = DAG.getMachineFunction();
|
|
int SSFI = MF.getFrameInfo()->CreateStackObject(8, 8);
|
|
// get address of 8 byte buffer
|
|
SDOperand StackSlot = DAG.getFrameIndex(SSFI, TLI.getPointerTy());
|
|
// word offset constant for Hi/Lo address computation
|
|
SDOperand WordOff = DAG.getConstant(sizeof(int), TLI.getPointerTy());
|
|
// set up Hi and Lo (into buffer) address based on endian
|
|
SDOperand Hi = StackSlot;
|
|
SDOperand Lo = DAG.getNode(ISD::ADD, TLI.getPointerTy(), StackSlot,WordOff);
|
|
if (TLI.isLittleEndian())
|
|
std::swap(Hi, Lo);
|
|
|
|
// if signed map to unsigned space
|
|
SDOperand Op0Mapped;
|
|
if (isSigned) {
|
|
// constant used to invert sign bit (signed to unsigned mapping)
|
|
SDOperand SignBit = DAG.getConstant(0x80000000u, MVT::i32);
|
|
Op0Mapped = DAG.getNode(ISD::XOR, MVT::i32, Op0, SignBit);
|
|
} else {
|
|
Op0Mapped = Op0;
|
|
}
|
|
// store the lo of the constructed double - based on integer input
|
|
SDOperand Store1 = DAG.getNode(ISD::STORE, MVT::Other, DAG.getEntryNode(),
|
|
Op0Mapped, Lo, DAG.getSrcValue(NULL));
|
|
// initial hi portion of constructed double
|
|
SDOperand InitialHi = DAG.getConstant(0x43300000u, MVT::i32);
|
|
// store the hi of the constructed double - biased exponent
|
|
SDOperand Store2 = DAG.getNode(ISD::STORE, MVT::Other, Store1,
|
|
InitialHi, Hi, DAG.getSrcValue(NULL));
|
|
// load the constructed double
|
|
SDOperand Load = DAG.getLoad(MVT::f64, Store2, StackSlot,
|
|
DAG.getSrcValue(NULL));
|
|
// FP constant to bias correct the final result
|
|
SDOperand Bias = DAG.getConstantFP(isSigned ?
|
|
BitsToDouble(0x4330000080000000ULL)
|
|
: BitsToDouble(0x4330000000000000ULL),
|
|
MVT::f64);
|
|
// subtract the bias
|
|
SDOperand Sub = DAG.getNode(ISD::FSUB, MVT::f64, Load, Bias);
|
|
// final result
|
|
SDOperand Result;
|
|
// handle final rounding
|
|
if (DestVT == MVT::f64) {
|
|
// do nothing
|
|
Result = Sub;
|
|
} else {
|
|
// if f32 then cast to f32
|
|
Result = DAG.getNode(ISD::FP_ROUND, MVT::f32, Sub);
|
|
}
|
|
return Result;
|
|
}
|
|
assert(!isSigned && "Legalize cannot Expand SINT_TO_FP for i64 yet");
|
|
SDOperand Tmp1 = DAG.getNode(ISD::SINT_TO_FP, DestVT, Op0);
|
|
|
|
SDOperand SignSet = DAG.getSetCC(TLI.getSetCCResultTy(), Op0,
|
|
DAG.getConstant(0, Op0.getValueType()),
|
|
ISD::SETLT);
|
|
SDOperand Zero = getIntPtrConstant(0), Four = getIntPtrConstant(4);
|
|
SDOperand CstOffset = DAG.getNode(ISD::SELECT, Zero.getValueType(),
|
|
SignSet, Four, Zero);
|
|
|
|
// If the sign bit of the integer is set, the large number will be treated
|
|
// as a negative number. To counteract this, the dynamic code adds an
|
|
// offset depending on the data type.
|
|
uint64_t FF;
|
|
switch (Op0.getValueType()) {
|
|
default: assert(0 && "Unsupported integer type!");
|
|
case MVT::i8 : FF = 0x43800000ULL; break; // 2^8 (as a float)
|
|
case MVT::i16: FF = 0x47800000ULL; break; // 2^16 (as a float)
|
|
case MVT::i32: FF = 0x4F800000ULL; break; // 2^32 (as a float)
|
|
case MVT::i64: FF = 0x5F800000ULL; break; // 2^64 (as a float)
|
|
}
|
|
if (TLI.isLittleEndian()) FF <<= 32;
|
|
static Constant *FudgeFactor = ConstantUInt::get(Type::ULongTy, FF);
|
|
|
|
SDOperand CPIdx = DAG.getConstantPool(FudgeFactor, TLI.getPointerTy());
|
|
CPIdx = DAG.getNode(ISD::ADD, TLI.getPointerTy(), CPIdx, CstOffset);
|
|
SDOperand FudgeInReg;
|
|
if (DestVT == MVT::f32)
|
|
FudgeInReg = DAG.getLoad(MVT::f32, DAG.getEntryNode(), CPIdx,
|
|
DAG.getSrcValue(NULL));
|
|
else {
|
|
assert(DestVT == MVT::f64 && "Unexpected conversion");
|
|
FudgeInReg = LegalizeOp(DAG.getExtLoad(ISD::EXTLOAD, MVT::f64,
|
|
DAG.getEntryNode(), CPIdx,
|
|
DAG.getSrcValue(NULL), MVT::f32));
|
|
}
|
|
|
|
return DAG.getNode(ISD::FADD, DestVT, Tmp1, FudgeInReg);
|
|
}
|
|
|
|
/// PromoteLegalINT_TO_FP - This function is responsible for legalizing a
|
|
/// *INT_TO_FP operation of the specified operand when the target requests that
|
|
/// we promote it. At this point, we know that the result and operand types are
|
|
/// legal for the target, and that there is a legal UINT_TO_FP or SINT_TO_FP
|
|
/// operation that takes a larger input.
|
|
SDOperand SelectionDAGLegalize::PromoteLegalINT_TO_FP(SDOperand LegalOp,
|
|
MVT::ValueType DestVT,
|
|
bool isSigned) {
|
|
// First step, figure out the appropriate *INT_TO_FP operation to use.
|
|
MVT::ValueType NewInTy = LegalOp.getValueType();
|
|
|
|
unsigned OpToUse = 0;
|
|
|
|
// Scan for the appropriate larger type to use.
|
|
while (1) {
|
|
NewInTy = (MVT::ValueType)(NewInTy+1);
|
|
assert(MVT::isInteger(NewInTy) && "Ran out of possibilities!");
|
|
|
|
// If the target supports SINT_TO_FP of this type, use it.
|
|
switch (TLI.getOperationAction(ISD::SINT_TO_FP, NewInTy)) {
|
|
default: break;
|
|
case TargetLowering::Legal:
|
|
if (!TLI.isTypeLegal(NewInTy))
|
|
break; // Can't use this datatype.
|
|
// FALL THROUGH.
|
|
case TargetLowering::Custom:
|
|
OpToUse = ISD::SINT_TO_FP;
|
|
break;
|
|
}
|
|
if (OpToUse) break;
|
|
if (isSigned) continue;
|
|
|
|
// If the target supports UINT_TO_FP of this type, use it.
|
|
switch (TLI.getOperationAction(ISD::UINT_TO_FP, NewInTy)) {
|
|
default: break;
|
|
case TargetLowering::Legal:
|
|
if (!TLI.isTypeLegal(NewInTy))
|
|
break; // Can't use this datatype.
|
|
// FALL THROUGH.
|
|
case TargetLowering::Custom:
|
|
OpToUse = ISD::UINT_TO_FP;
|
|
break;
|
|
}
|
|
if (OpToUse) break;
|
|
|
|
// Otherwise, try a larger type.
|
|
}
|
|
|
|
// Okay, we found the operation and type to use. Zero extend our input to the
|
|
// desired type then run the operation on it.
|
|
return DAG.getNode(OpToUse, DestVT,
|
|
DAG.getNode(isSigned ? ISD::SIGN_EXTEND : ISD::ZERO_EXTEND,
|
|
NewInTy, LegalOp));
|
|
}
|
|
|
|
/// PromoteLegalFP_TO_INT - This function is responsible for legalizing a
|
|
/// FP_TO_*INT operation of the specified operand when the target requests that
|
|
/// we promote it. At this point, we know that the result and operand types are
|
|
/// legal for the target, and that there is a legal FP_TO_UINT or FP_TO_SINT
|
|
/// operation that returns a larger result.
|
|
SDOperand SelectionDAGLegalize::PromoteLegalFP_TO_INT(SDOperand LegalOp,
|
|
MVT::ValueType DestVT,
|
|
bool isSigned) {
|
|
// First step, figure out the appropriate FP_TO*INT operation to use.
|
|
MVT::ValueType NewOutTy = DestVT;
|
|
|
|
unsigned OpToUse = 0;
|
|
|
|
// Scan for the appropriate larger type to use.
|
|
while (1) {
|
|
NewOutTy = (MVT::ValueType)(NewOutTy+1);
|
|
assert(MVT::isInteger(NewOutTy) && "Ran out of possibilities!");
|
|
|
|
// If the target supports FP_TO_SINT returning this type, use it.
|
|
switch (TLI.getOperationAction(ISD::FP_TO_SINT, NewOutTy)) {
|
|
default: break;
|
|
case TargetLowering::Legal:
|
|
if (!TLI.isTypeLegal(NewOutTy))
|
|
break; // Can't use this datatype.
|
|
// FALL THROUGH.
|
|
case TargetLowering::Custom:
|
|
OpToUse = ISD::FP_TO_SINT;
|
|
break;
|
|
}
|
|
if (OpToUse) break;
|
|
|
|
// If the target supports FP_TO_UINT of this type, use it.
|
|
switch (TLI.getOperationAction(ISD::FP_TO_UINT, NewOutTy)) {
|
|
default: break;
|
|
case TargetLowering::Legal:
|
|
if (!TLI.isTypeLegal(NewOutTy))
|
|
break; // Can't use this datatype.
|
|
// FALL THROUGH.
|
|
case TargetLowering::Custom:
|
|
OpToUse = ISD::FP_TO_UINT;
|
|
break;
|
|
}
|
|
if (OpToUse) break;
|
|
|
|
// Otherwise, try a larger type.
|
|
}
|
|
|
|
// Okay, we found the operation and type to use. Truncate the result of the
|
|
// extended FP_TO_*INT operation to the desired size.
|
|
return DAG.getNode(ISD::TRUNCATE, DestVT,
|
|
DAG.getNode(OpToUse, NewOutTy, LegalOp));
|
|
}
|
|
|
|
/// ExpandBSWAP - Open code the operations for BSWAP of the specified operation.
|
|
///
|
|
SDOperand SelectionDAGLegalize::ExpandBSWAP(SDOperand Op) {
|
|
MVT::ValueType VT = Op.getValueType();
|
|
MVT::ValueType SHVT = TLI.getShiftAmountTy();
|
|
SDOperand Tmp1, Tmp2, Tmp3, Tmp4, Tmp5, Tmp6, Tmp7, Tmp8;
|
|
switch (VT) {
|
|
default: assert(0 && "Unhandled Expand type in BSWAP!"); abort();
|
|
case MVT::i16:
|
|
Tmp2 = DAG.getNode(ISD::SHL, VT, Op, DAG.getConstant(8, SHVT));
|
|
Tmp1 = DAG.getNode(ISD::SRL, VT, Op, DAG.getConstant(8, SHVT));
|
|
return DAG.getNode(ISD::OR, VT, Tmp1, Tmp2);
|
|
case MVT::i32:
|
|
Tmp4 = DAG.getNode(ISD::SHL, VT, Op, DAG.getConstant(24, SHVT));
|
|
Tmp3 = DAG.getNode(ISD::SHL, VT, Op, DAG.getConstant(8, SHVT));
|
|
Tmp2 = DAG.getNode(ISD::SRL, VT, Op, DAG.getConstant(8, SHVT));
|
|
Tmp1 = DAG.getNode(ISD::SRL, VT, Op, DAG.getConstant(24, SHVT));
|
|
Tmp3 = DAG.getNode(ISD::AND, VT, Tmp3, DAG.getConstant(0xFF0000, VT));
|
|
Tmp2 = DAG.getNode(ISD::AND, VT, Tmp2, DAG.getConstant(0xFF00, VT));
|
|
Tmp4 = DAG.getNode(ISD::OR, VT, Tmp4, Tmp3);
|
|
Tmp2 = DAG.getNode(ISD::OR, VT, Tmp2, Tmp1);
|
|
return DAG.getNode(ISD::OR, VT, Tmp4, Tmp2);
|
|
case MVT::i64:
|
|
Tmp8 = DAG.getNode(ISD::SHL, VT, Op, DAG.getConstant(56, SHVT));
|
|
Tmp7 = DAG.getNode(ISD::SHL, VT, Op, DAG.getConstant(40, SHVT));
|
|
Tmp6 = DAG.getNode(ISD::SHL, VT, Op, DAG.getConstant(24, SHVT));
|
|
Tmp5 = DAG.getNode(ISD::SHL, VT, Op, DAG.getConstant(8, SHVT));
|
|
Tmp4 = DAG.getNode(ISD::SRL, VT, Op, DAG.getConstant(8, SHVT));
|
|
Tmp3 = DAG.getNode(ISD::SRL, VT, Op, DAG.getConstant(24, SHVT));
|
|
Tmp2 = DAG.getNode(ISD::SRL, VT, Op, DAG.getConstant(40, SHVT));
|
|
Tmp1 = DAG.getNode(ISD::SRL, VT, Op, DAG.getConstant(56, SHVT));
|
|
Tmp7 = DAG.getNode(ISD::AND, VT, Tmp7, DAG.getConstant(255ULL<<48, VT));
|
|
Tmp6 = DAG.getNode(ISD::AND, VT, Tmp6, DAG.getConstant(255ULL<<40, VT));
|
|
Tmp5 = DAG.getNode(ISD::AND, VT, Tmp5, DAG.getConstant(255ULL<<32, VT));
|
|
Tmp4 = DAG.getNode(ISD::AND, VT, Tmp4, DAG.getConstant(255ULL<<24, VT));
|
|
Tmp3 = DAG.getNode(ISD::AND, VT, Tmp3, DAG.getConstant(255ULL<<16, VT));
|
|
Tmp2 = DAG.getNode(ISD::AND, VT, Tmp2, DAG.getConstant(255ULL<<8 , VT));
|
|
Tmp8 = DAG.getNode(ISD::OR, VT, Tmp8, Tmp7);
|
|
Tmp6 = DAG.getNode(ISD::OR, VT, Tmp6, Tmp5);
|
|
Tmp4 = DAG.getNode(ISD::OR, VT, Tmp4, Tmp3);
|
|
Tmp2 = DAG.getNode(ISD::OR, VT, Tmp2, Tmp1);
|
|
Tmp8 = DAG.getNode(ISD::OR, VT, Tmp8, Tmp6);
|
|
Tmp4 = DAG.getNode(ISD::OR, VT, Tmp4, Tmp2);
|
|
return DAG.getNode(ISD::OR, VT, Tmp8, Tmp4);
|
|
}
|
|
}
|
|
|
|
/// ExpandBitCount - Expand the specified bitcount instruction into operations.
|
|
///
|
|
SDOperand SelectionDAGLegalize::ExpandBitCount(unsigned Opc, SDOperand Op) {
|
|
switch (Opc) {
|
|
default: assert(0 && "Cannot expand this yet!");
|
|
case ISD::CTPOP: {
|
|
static const uint64_t mask[6] = {
|
|
0x5555555555555555ULL, 0x3333333333333333ULL,
|
|
0x0F0F0F0F0F0F0F0FULL, 0x00FF00FF00FF00FFULL,
|
|
0x0000FFFF0000FFFFULL, 0x00000000FFFFFFFFULL
|
|
};
|
|
MVT::ValueType VT = Op.getValueType();
|
|
MVT::ValueType ShVT = TLI.getShiftAmountTy();
|
|
unsigned len = getSizeInBits(VT);
|
|
for (unsigned i = 0; (1U << i) <= (len / 2); ++i) {
|
|
//x = (x & mask[i][len/8]) + (x >> (1 << i) & mask[i][len/8])
|
|
SDOperand Tmp2 = DAG.getConstant(mask[i], VT);
|
|
SDOperand Tmp3 = DAG.getConstant(1ULL << i, ShVT);
|
|
Op = DAG.getNode(ISD::ADD, VT, DAG.getNode(ISD::AND, VT, Op, Tmp2),
|
|
DAG.getNode(ISD::AND, VT,
|
|
DAG.getNode(ISD::SRL, VT, Op, Tmp3),Tmp2));
|
|
}
|
|
return Op;
|
|
}
|
|
case ISD::CTLZ: {
|
|
// for now, we do this:
|
|
// x = x | (x >> 1);
|
|
// x = x | (x >> 2);
|
|
// ...
|
|
// x = x | (x >>16);
|
|
// x = x | (x >>32); // for 64-bit input
|
|
// return popcount(~x);
|
|
//
|
|
// but see also: http://www.hackersdelight.org/HDcode/nlz.cc
|
|
MVT::ValueType VT = Op.getValueType();
|
|
MVT::ValueType ShVT = TLI.getShiftAmountTy();
|
|
unsigned len = getSizeInBits(VT);
|
|
for (unsigned i = 0; (1U << i) <= (len / 2); ++i) {
|
|
SDOperand Tmp3 = DAG.getConstant(1ULL << i, ShVT);
|
|
Op = DAG.getNode(ISD::OR, VT, Op, DAG.getNode(ISD::SRL, VT, Op, Tmp3));
|
|
}
|
|
Op = DAG.getNode(ISD::XOR, VT, Op, DAG.getConstant(~0ULL, VT));
|
|
return DAG.getNode(ISD::CTPOP, VT, Op);
|
|
}
|
|
case ISD::CTTZ: {
|
|
// for now, we use: { return popcount(~x & (x - 1)); }
|
|
// unless the target has ctlz but not ctpop, in which case we use:
|
|
// { return 32 - nlz(~x & (x-1)); }
|
|
// see also http://www.hackersdelight.org/HDcode/ntz.cc
|
|
MVT::ValueType VT = Op.getValueType();
|
|
SDOperand Tmp2 = DAG.getConstant(~0ULL, VT);
|
|
SDOperand Tmp3 = DAG.getNode(ISD::AND, VT,
|
|
DAG.getNode(ISD::XOR, VT, Op, Tmp2),
|
|
DAG.getNode(ISD::SUB, VT, Op, DAG.getConstant(1, VT)));
|
|
// If ISD::CTLZ is legal and CTPOP isn't, then do that instead.
|
|
if (!TLI.isOperationLegal(ISD::CTPOP, VT) &&
|
|
TLI.isOperationLegal(ISD::CTLZ, VT))
|
|
return DAG.getNode(ISD::SUB, VT,
|
|
DAG.getConstant(getSizeInBits(VT), VT),
|
|
DAG.getNode(ISD::CTLZ, VT, Tmp3));
|
|
return DAG.getNode(ISD::CTPOP, VT, Tmp3);
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
/// ExpandOp - Expand the specified SDOperand into its two component pieces
|
|
/// Lo&Hi. Note that the Op MUST be an expanded type. As a result of this, the
|
|
/// LegalizeNodes map is filled in for any results that are not expanded, the
|
|
/// ExpandedNodes map is filled in for any results that are expanded, and the
|
|
/// Lo/Hi values are returned.
|
|
void SelectionDAGLegalize::ExpandOp(SDOperand Op, SDOperand &Lo, SDOperand &Hi){
|
|
MVT::ValueType VT = Op.getValueType();
|
|
MVT::ValueType NVT = TLI.getTypeToTransformTo(VT);
|
|
SDNode *Node = Op.Val;
|
|
assert(getTypeAction(VT) == Expand && "Not an expanded type!");
|
|
assert((MVT::isInteger(VT) || VT == MVT::Vector) &&
|
|
"Cannot expand FP values!");
|
|
assert(((MVT::isInteger(NVT) && NVT < VT) || VT == MVT::Vector) &&
|
|
"Cannot expand to FP value or to larger int value!");
|
|
|
|
// See if we already expanded it.
|
|
std::map<SDOperand, std::pair<SDOperand, SDOperand> >::iterator I
|
|
= ExpandedNodes.find(Op);
|
|
if (I != ExpandedNodes.end()) {
|
|
Lo = I->second.first;
|
|
Hi = I->second.second;
|
|
return;
|
|
}
|
|
|
|
switch (Node->getOpcode()) {
|
|
case ISD::CopyFromReg:
|
|
assert(0 && "CopyFromReg must be legal!");
|
|
default:
|
|
std::cerr << "NODE: "; Node->dump(); std::cerr << "\n";
|
|
assert(0 && "Do not know how to expand this operator!");
|
|
abort();
|
|
case ISD::UNDEF:
|
|
Lo = DAG.getNode(ISD::UNDEF, NVT);
|
|
Hi = DAG.getNode(ISD::UNDEF, NVT);
|
|
break;
|
|
case ISD::Constant: {
|
|
uint64_t Cst = cast<ConstantSDNode>(Node)->getValue();
|
|
Lo = DAG.getConstant(Cst, NVT);
|
|
Hi = DAG.getConstant(Cst >> MVT::getSizeInBits(NVT), NVT);
|
|
break;
|
|
}
|
|
case ISD::BUILD_PAIR:
|
|
// Return the operands.
|
|
Lo = Node->getOperand(0);
|
|
Hi = Node->getOperand(1);
|
|
break;
|
|
|
|
case ISD::SIGN_EXTEND_INREG:
|
|
ExpandOp(Node->getOperand(0), Lo, Hi);
|
|
// Sign extend the lo-part.
|
|
Hi = DAG.getNode(ISD::SRA, NVT, Lo,
|
|
DAG.getConstant(MVT::getSizeInBits(NVT)-1,
|
|
TLI.getShiftAmountTy()));
|
|
// sext_inreg the low part if needed.
|
|
Lo = DAG.getNode(ISD::SIGN_EXTEND_INREG, NVT, Lo, Node->getOperand(1));
|
|
break;
|
|
|
|
case ISD::BSWAP: {
|
|
ExpandOp(Node->getOperand(0), Lo, Hi);
|
|
SDOperand TempLo = DAG.getNode(ISD::BSWAP, NVT, Hi);
|
|
Hi = DAG.getNode(ISD::BSWAP, NVT, Lo);
|
|
Lo = TempLo;
|
|
break;
|
|
}
|
|
|
|
case ISD::CTPOP:
|
|
ExpandOp(Node->getOperand(0), Lo, Hi);
|
|
Lo = DAG.getNode(ISD::ADD, NVT, // ctpop(HL) -> ctpop(H)+ctpop(L)
|
|
DAG.getNode(ISD::CTPOP, NVT, Lo),
|
|
DAG.getNode(ISD::CTPOP, NVT, Hi));
|
|
Hi = DAG.getConstant(0, NVT);
|
|
break;
|
|
|
|
case ISD::CTLZ: {
|
|
// ctlz (HL) -> ctlz(H) != 32 ? ctlz(H) : (ctlz(L)+32)
|
|
ExpandOp(Node->getOperand(0), Lo, Hi);
|
|
SDOperand BitsC = DAG.getConstant(MVT::getSizeInBits(NVT), NVT);
|
|
SDOperand HLZ = DAG.getNode(ISD::CTLZ, NVT, Hi);
|
|
SDOperand TopNotZero = DAG.getSetCC(TLI.getSetCCResultTy(), HLZ, BitsC,
|
|
ISD::SETNE);
|
|
SDOperand LowPart = DAG.getNode(ISD::CTLZ, NVT, Lo);
|
|
LowPart = DAG.getNode(ISD::ADD, NVT, LowPart, BitsC);
|
|
|
|
Lo = DAG.getNode(ISD::SELECT, NVT, TopNotZero, HLZ, LowPart);
|
|
Hi = DAG.getConstant(0, NVT);
|
|
break;
|
|
}
|
|
|
|
case ISD::CTTZ: {
|
|
// cttz (HL) -> cttz(L) != 32 ? cttz(L) : (cttz(H)+32)
|
|
ExpandOp(Node->getOperand(0), Lo, Hi);
|
|
SDOperand BitsC = DAG.getConstant(MVT::getSizeInBits(NVT), NVT);
|
|
SDOperand LTZ = DAG.getNode(ISD::CTTZ, NVT, Lo);
|
|
SDOperand BotNotZero = DAG.getSetCC(TLI.getSetCCResultTy(), LTZ, BitsC,
|
|
ISD::SETNE);
|
|
SDOperand HiPart = DAG.getNode(ISD::CTTZ, NVT, Hi);
|
|
HiPart = DAG.getNode(ISD::ADD, NVT, HiPart, BitsC);
|
|
|
|
Lo = DAG.getNode(ISD::SELECT, NVT, BotNotZero, LTZ, HiPart);
|
|
Hi = DAG.getConstant(0, NVT);
|
|
break;
|
|
}
|
|
|
|
case ISD::VAARG: {
|
|
SDOperand Ch = Node->getOperand(0); // Legalize the chain.
|
|
SDOperand Ptr = Node->getOperand(1); // Legalize the pointer.
|
|
Lo = DAG.getVAArg(NVT, Ch, Ptr, Node->getOperand(2));
|
|
Hi = DAG.getVAArg(NVT, Lo.getValue(1), Ptr, Node->getOperand(2));
|
|
|
|
// Remember that we legalized the chain.
|
|
Hi = LegalizeOp(Hi);
|
|
AddLegalizedOperand(Op.getValue(1), Hi.getValue(1));
|
|
if (!TLI.isLittleEndian())
|
|
std::swap(Lo, Hi);
|
|
break;
|
|
}
|
|
|
|
case ISD::LOAD: {
|
|
SDOperand Ch = Node->getOperand(0); // Legalize the chain.
|
|
SDOperand Ptr = Node->getOperand(1); // Legalize the pointer.
|
|
Lo = DAG.getLoad(NVT, Ch, Ptr, Node->getOperand(2));
|
|
|
|
// Increment the pointer to the other half.
|
|
unsigned IncrementSize = MVT::getSizeInBits(Lo.getValueType())/8;
|
|
Ptr = DAG.getNode(ISD::ADD, Ptr.getValueType(), Ptr,
|
|
getIntPtrConstant(IncrementSize));
|
|
// FIXME: This creates a bogus srcvalue!
|
|
Hi = DAG.getLoad(NVT, Ch, Ptr, Node->getOperand(2));
|
|
|
|
// Build a factor node to remember that this load is independent of the
|
|
// other one.
|
|
SDOperand TF = DAG.getNode(ISD::TokenFactor, MVT::Other, Lo.getValue(1),
|
|
Hi.getValue(1));
|
|
|
|
// Remember that we legalized the chain.
|
|
AddLegalizedOperand(Op.getValue(1), LegalizeOp(TF));
|
|
if (!TLI.isLittleEndian())
|
|
std::swap(Lo, Hi);
|
|
break;
|
|
}
|
|
case ISD::AND:
|
|
case ISD::OR:
|
|
case ISD::XOR: { // Simple logical operators -> two trivial pieces.
|
|
SDOperand LL, LH, RL, RH;
|
|
ExpandOp(Node->getOperand(0), LL, LH);
|
|
ExpandOp(Node->getOperand(1), RL, RH);
|
|
Lo = DAG.getNode(Node->getOpcode(), NVT, LL, RL);
|
|
Hi = DAG.getNode(Node->getOpcode(), NVT, LH, RH);
|
|
break;
|
|
}
|
|
case ISD::SELECT: {
|
|
SDOperand LL, LH, RL, RH;
|
|
ExpandOp(Node->getOperand(1), LL, LH);
|
|
ExpandOp(Node->getOperand(2), RL, RH);
|
|
Lo = DAG.getNode(ISD::SELECT, NVT, Node->getOperand(0), LL, RL);
|
|
Hi = DAG.getNode(ISD::SELECT, NVT, Node->getOperand(0), LH, RH);
|
|
break;
|
|
}
|
|
case ISD::SELECT_CC: {
|
|
SDOperand TL, TH, FL, FH;
|
|
ExpandOp(Node->getOperand(2), TL, TH);
|
|
ExpandOp(Node->getOperand(3), FL, FH);
|
|
Lo = DAG.getNode(ISD::SELECT_CC, NVT, Node->getOperand(0),
|
|
Node->getOperand(1), TL, FL, Node->getOperand(4));
|
|
Hi = DAG.getNode(ISD::SELECT_CC, NVT, Node->getOperand(0),
|
|
Node->getOperand(1), TH, FH, Node->getOperand(4));
|
|
break;
|
|
}
|
|
case ISD::SEXTLOAD: {
|
|
SDOperand Chain = Node->getOperand(0);
|
|
SDOperand Ptr = Node->getOperand(1);
|
|
MVT::ValueType EVT = cast<VTSDNode>(Node->getOperand(3))->getVT();
|
|
|
|
if (EVT == NVT)
|
|
Lo = DAG.getLoad(NVT, Chain, Ptr, Node->getOperand(2));
|
|
else
|
|
Lo = DAG.getExtLoad(ISD::SEXTLOAD, NVT, Chain, Ptr, Node->getOperand(2),
|
|
EVT);
|
|
|
|
// Remember that we legalized the chain.
|
|
AddLegalizedOperand(SDOperand(Node, 1), LegalizeOp(Lo.getValue(1)));
|
|
|
|
// The high part is obtained by SRA'ing all but one of the bits of the lo
|
|
// part.
|
|
unsigned LoSize = MVT::getSizeInBits(Lo.getValueType());
|
|
Hi = DAG.getNode(ISD::SRA, NVT, Lo, DAG.getConstant(LoSize-1,
|
|
TLI.getShiftAmountTy()));
|
|
break;
|
|
}
|
|
case ISD::ZEXTLOAD: {
|
|
SDOperand Chain = Node->getOperand(0);
|
|
SDOperand Ptr = Node->getOperand(1);
|
|
MVT::ValueType EVT = cast<VTSDNode>(Node->getOperand(3))->getVT();
|
|
|
|
if (EVT == NVT)
|
|
Lo = DAG.getLoad(NVT, Chain, Ptr, Node->getOperand(2));
|
|
else
|
|
Lo = DAG.getExtLoad(ISD::ZEXTLOAD, NVT, Chain, Ptr, Node->getOperand(2),
|
|
EVT);
|
|
|
|
// Remember that we legalized the chain.
|
|
AddLegalizedOperand(SDOperand(Node, 1), LegalizeOp(Lo.getValue(1)));
|
|
|
|
// The high part is just a zero.
|
|
Hi = DAG.getConstant(0, NVT);
|
|
break;
|
|
}
|
|
case ISD::EXTLOAD: {
|
|
SDOperand Chain = Node->getOperand(0);
|
|
SDOperand Ptr = Node->getOperand(1);
|
|
MVT::ValueType EVT = cast<VTSDNode>(Node->getOperand(3))->getVT();
|
|
|
|
if (EVT == NVT)
|
|
Lo = DAG.getLoad(NVT, Chain, Ptr, Node->getOperand(2));
|
|
else
|
|
Lo = DAG.getExtLoad(ISD::EXTLOAD, NVT, Chain, Ptr, Node->getOperand(2),
|
|
EVT);
|
|
|
|
// Remember that we legalized the chain.
|
|
AddLegalizedOperand(SDOperand(Node, 1), LegalizeOp(Lo.getValue(1)));
|
|
|
|
// The high part is undefined.
|
|
Hi = DAG.getNode(ISD::UNDEF, NVT);
|
|
break;
|
|
}
|
|
case ISD::ANY_EXTEND:
|
|
// The low part is any extension of the input (which degenerates to a copy).
|
|
Lo = DAG.getNode(ISD::ANY_EXTEND, NVT, Node->getOperand(0));
|
|
// The high part is undefined.
|
|
Hi = DAG.getNode(ISD::UNDEF, NVT);
|
|
break;
|
|
case ISD::SIGN_EXTEND: {
|
|
// The low part is just a sign extension of the input (which degenerates to
|
|
// a copy).
|
|
Lo = DAG.getNode(ISD::SIGN_EXTEND, NVT, Node->getOperand(0));
|
|
|
|
// The high part is obtained by SRA'ing all but one of the bits of the lo
|
|
// part.
|
|
unsigned LoSize = MVT::getSizeInBits(Lo.getValueType());
|
|
Hi = DAG.getNode(ISD::SRA, NVT, Lo,
|
|
DAG.getConstant(LoSize-1, TLI.getShiftAmountTy()));
|
|
break;
|
|
}
|
|
case ISD::ZERO_EXTEND:
|
|
// The low part is just a zero extension of the input (which degenerates to
|
|
// a copy).
|
|
Lo = DAG.getNode(ISD::ZERO_EXTEND, NVT, Node->getOperand(0));
|
|
|
|
// The high part is just a zero.
|
|
Hi = DAG.getConstant(0, NVT);
|
|
break;
|
|
|
|
case ISD::BIT_CONVERT: {
|
|
SDOperand Tmp = ExpandBIT_CONVERT(Node->getValueType(0),
|
|
Node->getOperand(0));
|
|
ExpandOp(Tmp, Lo, Hi);
|
|
break;
|
|
}
|
|
|
|
case ISD::READCYCLECOUNTER:
|
|
assert(TLI.getOperationAction(ISD::READCYCLECOUNTER, VT) ==
|
|
TargetLowering::Custom &&
|
|
"Must custom expand ReadCycleCounter");
|
|
Lo = TLI.LowerOperation(Op, DAG);
|
|
assert(Lo.Val && "Node must be custom expanded!");
|
|
Hi = Lo.getValue(1);
|
|
AddLegalizedOperand(SDOperand(Node, 1), // Remember we legalized the chain.
|
|
LegalizeOp(Lo.getValue(2)));
|
|
break;
|
|
|
|
// These operators cannot be expanded directly, emit them as calls to
|
|
// library functions.
|
|
case ISD::FP_TO_SINT:
|
|
if (TLI.getOperationAction(ISD::FP_TO_SINT, VT) == TargetLowering::Custom) {
|
|
SDOperand Op;
|
|
switch (getTypeAction(Node->getOperand(0).getValueType())) {
|
|
case Expand: assert(0 && "cannot expand FP!");
|
|
case Legal: Op = LegalizeOp(Node->getOperand(0)); break;
|
|
case Promote: Op = PromoteOp (Node->getOperand(0)); break;
|
|
}
|
|
|
|
Op = TLI.LowerOperation(DAG.getNode(ISD::FP_TO_SINT, VT, Op), DAG);
|
|
|
|
// Now that the custom expander is done, expand the result, which is still
|
|
// VT.
|
|
if (Op.Val) {
|
|
ExpandOp(Op, Lo, Hi);
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (Node->getOperand(0).getValueType() == MVT::f32)
|
|
Lo = ExpandLibCall("__fixsfdi", Node, Hi);
|
|
else
|
|
Lo = ExpandLibCall("__fixdfdi", Node, Hi);
|
|
break;
|
|
|
|
case ISD::FP_TO_UINT:
|
|
if (TLI.getOperationAction(ISD::FP_TO_UINT, VT) == TargetLowering::Custom) {
|
|
SDOperand Op;
|
|
switch (getTypeAction(Node->getOperand(0).getValueType())) {
|
|
case Expand: assert(0 && "cannot expand FP!");
|
|
case Legal: Op = LegalizeOp(Node->getOperand(0)); break;
|
|
case Promote: Op = PromoteOp (Node->getOperand(0)); break;
|
|
}
|
|
|
|
Op = TLI.LowerOperation(DAG.getNode(ISD::FP_TO_UINT, VT, Op), DAG);
|
|
|
|
// Now that the custom expander is done, expand the result.
|
|
if (Op.Val) {
|
|
ExpandOp(Op, Lo, Hi);
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (Node->getOperand(0).getValueType() == MVT::f32)
|
|
Lo = ExpandLibCall("__fixunssfdi", Node, Hi);
|
|
else
|
|
Lo = ExpandLibCall("__fixunsdfdi", Node, Hi);
|
|
break;
|
|
|
|
case ISD::SHL: {
|
|
// If the target wants custom lowering, do so.
|
|
SDOperand ShiftAmt = LegalizeOp(Node->getOperand(1));
|
|
if (TLI.getOperationAction(ISD::SHL, VT) == TargetLowering::Custom) {
|
|
SDOperand Op = DAG.getNode(ISD::SHL, VT, Node->getOperand(0), ShiftAmt);
|
|
Op = TLI.LowerOperation(Op, DAG);
|
|
if (Op.Val) {
|
|
// Now that the custom expander is done, expand the result, which is
|
|
// still VT.
|
|
ExpandOp(Op, Lo, Hi);
|
|
break;
|
|
}
|
|
}
|
|
|
|
// If we can emit an efficient shift operation, do so now.
|
|
if (ExpandShift(ISD::SHL, Node->getOperand(0), ShiftAmt, Lo, Hi))
|
|
break;
|
|
|
|
// If this target supports SHL_PARTS, use it.
|
|
TargetLowering::LegalizeAction Action =
|
|
TLI.getOperationAction(ISD::SHL_PARTS, NVT);
|
|
if ((Action == TargetLowering::Legal && TLI.isTypeLegal(NVT)) ||
|
|
Action == TargetLowering::Custom) {
|
|
ExpandShiftParts(ISD::SHL_PARTS, Node->getOperand(0), ShiftAmt, Lo, Hi);
|
|
break;
|
|
}
|
|
|
|
// Otherwise, emit a libcall.
|
|
Lo = ExpandLibCall("__ashldi3", Node, Hi);
|
|
break;
|
|
}
|
|
|
|
case ISD::SRA: {
|
|
// If the target wants custom lowering, do so.
|
|
SDOperand ShiftAmt = LegalizeOp(Node->getOperand(1));
|
|
if (TLI.getOperationAction(ISD::SRA, VT) == TargetLowering::Custom) {
|
|
SDOperand Op = DAG.getNode(ISD::SRA, VT, Node->getOperand(0), ShiftAmt);
|
|
Op = TLI.LowerOperation(Op, DAG);
|
|
if (Op.Val) {
|
|
// Now that the custom expander is done, expand the result, which is
|
|
// still VT.
|
|
ExpandOp(Op, Lo, Hi);
|
|
break;
|
|
}
|
|
}
|
|
|
|
// If we can emit an efficient shift operation, do so now.
|
|
if (ExpandShift(ISD::SRA, Node->getOperand(0), ShiftAmt, Lo, Hi))
|
|
break;
|
|
|
|
// If this target supports SRA_PARTS, use it.
|
|
TargetLowering::LegalizeAction Action =
|
|
TLI.getOperationAction(ISD::SRA_PARTS, NVT);
|
|
if ((Action == TargetLowering::Legal && TLI.isTypeLegal(NVT)) ||
|
|
Action == TargetLowering::Custom) {
|
|
ExpandShiftParts(ISD::SRA_PARTS, Node->getOperand(0), ShiftAmt, Lo, Hi);
|
|
break;
|
|
}
|
|
|
|
// Otherwise, emit a libcall.
|
|
Lo = ExpandLibCall("__ashrdi3", Node, Hi);
|
|
break;
|
|
}
|
|
|
|
case ISD::SRL: {
|
|
// If the target wants custom lowering, do so.
|
|
SDOperand ShiftAmt = LegalizeOp(Node->getOperand(1));
|
|
if (TLI.getOperationAction(ISD::SRL, VT) == TargetLowering::Custom) {
|
|
SDOperand Op = DAG.getNode(ISD::SRL, VT, Node->getOperand(0), ShiftAmt);
|
|
Op = TLI.LowerOperation(Op, DAG);
|
|
if (Op.Val) {
|
|
// Now that the custom expander is done, expand the result, which is
|
|
// still VT.
|
|
ExpandOp(Op, Lo, Hi);
|
|
break;
|
|
}
|
|
}
|
|
|
|
// If we can emit an efficient shift operation, do so now.
|
|
if (ExpandShift(ISD::SRL, Node->getOperand(0), ShiftAmt, Lo, Hi))
|
|
break;
|
|
|
|
// If this target supports SRL_PARTS, use it.
|
|
TargetLowering::LegalizeAction Action =
|
|
TLI.getOperationAction(ISD::SRL_PARTS, NVT);
|
|
if ((Action == TargetLowering::Legal && TLI.isTypeLegal(NVT)) ||
|
|
Action == TargetLowering::Custom) {
|
|
ExpandShiftParts(ISD::SRL_PARTS, Node->getOperand(0), ShiftAmt, Lo, Hi);
|
|
break;
|
|
}
|
|
|
|
// Otherwise, emit a libcall.
|
|
Lo = ExpandLibCall("__lshrdi3", Node, Hi);
|
|
break;
|
|
}
|
|
|
|
case ISD::ADD:
|
|
case ISD::SUB: {
|
|
// If the target wants to custom expand this, let them.
|
|
if (TLI.getOperationAction(Node->getOpcode(), VT) ==
|
|
TargetLowering::Custom) {
|
|
Op = TLI.LowerOperation(Op, DAG);
|
|
if (Op.Val) {
|
|
ExpandOp(Op, Lo, Hi);
|
|
break;
|
|
}
|
|
}
|
|
|
|
// Expand the subcomponents.
|
|
SDOperand LHSL, LHSH, RHSL, RHSH;
|
|
ExpandOp(Node->getOperand(0), LHSL, LHSH);
|
|
ExpandOp(Node->getOperand(1), RHSL, RHSH);
|
|
std::vector<MVT::ValueType> VTs;
|
|
std::vector<SDOperand> LoOps, HiOps;
|
|
VTs.push_back(LHSL.getValueType());
|
|
VTs.push_back(MVT::Flag);
|
|
LoOps.push_back(LHSL);
|
|
LoOps.push_back(RHSL);
|
|
HiOps.push_back(LHSH);
|
|
HiOps.push_back(RHSH);
|
|
if (Node->getOpcode() == ISD::ADD) {
|
|
Lo = DAG.getNode(ISD::ADDC, VTs, LoOps);
|
|
HiOps.push_back(Lo.getValue(1));
|
|
Hi = DAG.getNode(ISD::ADDE, VTs, HiOps);
|
|
} else {
|
|
Lo = DAG.getNode(ISD::SUBC, VTs, LoOps);
|
|
HiOps.push_back(Lo.getValue(1));
|
|
Hi = DAG.getNode(ISD::SUBE, VTs, HiOps);
|
|
}
|
|
break;
|
|
}
|
|
case ISD::MUL: {
|
|
if (TLI.isOperationLegal(ISD::MULHU, NVT)) {
|
|
SDOperand LL, LH, RL, RH;
|
|
ExpandOp(Node->getOperand(0), LL, LH);
|
|
ExpandOp(Node->getOperand(1), RL, RH);
|
|
unsigned SH = MVT::getSizeInBits(RH.getValueType())-1;
|
|
// MULHS implicitly sign extends its inputs. Check to see if ExpandOp
|
|
// extended the sign bit of the low half through the upper half, and if so
|
|
// emit a MULHS instead of the alternate sequence that is valid for any
|
|
// i64 x i64 multiply.
|
|
if (TLI.isOperationLegal(ISD::MULHS, NVT) &&
|
|
// is RH an extension of the sign bit of RL?
|
|
RH.getOpcode() == ISD::SRA && RH.getOperand(0) == RL &&
|
|
RH.getOperand(1).getOpcode() == ISD::Constant &&
|
|
cast<ConstantSDNode>(RH.getOperand(1))->getValue() == SH &&
|
|
// is LH an extension of the sign bit of LL?
|
|
LH.getOpcode() == ISD::SRA && LH.getOperand(0) == LL &&
|
|
LH.getOperand(1).getOpcode() == ISD::Constant &&
|
|
cast<ConstantSDNode>(LH.getOperand(1))->getValue() == SH) {
|
|
Hi = DAG.getNode(ISD::MULHS, NVT, LL, RL);
|
|
} else {
|
|
Hi = DAG.getNode(ISD::MULHU, NVT, LL, RL);
|
|
RH = DAG.getNode(ISD::MUL, NVT, LL, RH);
|
|
LH = DAG.getNode(ISD::MUL, NVT, LH, RL);
|
|
Hi = DAG.getNode(ISD::ADD, NVT, Hi, RH);
|
|
Hi = DAG.getNode(ISD::ADD, NVT, Hi, LH);
|
|
}
|
|
Lo = DAG.getNode(ISD::MUL, NVT, LL, RL);
|
|
} else {
|
|
Lo = ExpandLibCall("__muldi3" , Node, Hi);
|
|
}
|
|
break;
|
|
}
|
|
case ISD::SDIV: Lo = ExpandLibCall("__divdi3" , Node, Hi); break;
|
|
case ISD::UDIV: Lo = ExpandLibCall("__udivdi3", Node, Hi); break;
|
|
case ISD::SREM: Lo = ExpandLibCall("__moddi3" , Node, Hi); break;
|
|
case ISD::UREM: Lo = ExpandLibCall("__umoddi3", Node, Hi); break;
|
|
}
|
|
|
|
// Make sure the resultant values have been legalized themselves, unless this
|
|
// is a type that requires multi-step expansion.
|
|
if (getTypeAction(NVT) != Expand && NVT != MVT::isVoid) {
|
|
Lo = LegalizeOp(Lo);
|
|
Hi = LegalizeOp(Hi);
|
|
}
|
|
|
|
// Remember in a map if the values will be reused later.
|
|
bool isNew =
|
|
ExpandedNodes.insert(std::make_pair(Op, std::make_pair(Lo, Hi))).second;
|
|
assert(isNew && "Value already expanded?!?");
|
|
}
|
|
|
|
/// SplitVectorOp - Given an operand of MVT::Vector type, break it down into
|
|
/// two smaller values of MVT::Vector type.
|
|
void SelectionDAGLegalize::SplitVectorOp(SDOperand Op, SDOperand &Lo,
|
|
SDOperand &Hi) {
|
|
assert(Op.getValueType() == MVT::Vector && "Cannot split non-vector type!");
|
|
SDNode *Node = Op.Val;
|
|
unsigned NumElements = cast<ConstantSDNode>(*(Node->op_end()-2))->getValue();
|
|
assert(NumElements > 1 && "Cannot split a single element vector!");
|
|
unsigned NewNumElts = NumElements/2;
|
|
SDOperand NewNumEltsNode = DAG.getConstant(NewNumElts, MVT::i32);
|
|
SDOperand TypeNode = *(Node->op_end()-1);
|
|
|
|
// See if we already split it.
|
|
std::map<SDOperand, std::pair<SDOperand, SDOperand> >::iterator I
|
|
= SplitNodes.find(Op);
|
|
if (I != SplitNodes.end()) {
|
|
Lo = I->second.first;
|
|
Hi = I->second.second;
|
|
return;
|
|
}
|
|
|
|
switch (Node->getOpcode()) {
|
|
default: Node->dump(); assert(0 && "Unknown vector operation!");
|
|
case ISD::VBUILD_VECTOR: {
|
|
std::vector<SDOperand> LoOps(Node->op_begin(), Node->op_begin()+NewNumElts);
|
|
LoOps.push_back(NewNumEltsNode);
|
|
LoOps.push_back(TypeNode);
|
|
Lo = DAG.getNode(ISD::VBUILD_VECTOR, MVT::Vector, LoOps);
|
|
|
|
std::vector<SDOperand> HiOps(Node->op_begin()+NewNumElts, Node->op_end()-2);
|
|
HiOps.push_back(NewNumEltsNode);
|
|
HiOps.push_back(TypeNode);
|
|
Hi = DAG.getNode(ISD::VBUILD_VECTOR, MVT::Vector, HiOps);
|
|
break;
|
|
}
|
|
case ISD::VADD:
|
|
case ISD::VSUB:
|
|
case ISD::VMUL:
|
|
case ISD::VSDIV:
|
|
case ISD::VUDIV:
|
|
case ISD::VAND:
|
|
case ISD::VOR:
|
|
case ISD::VXOR: {
|
|
SDOperand LL, LH, RL, RH;
|
|
SplitVectorOp(Node->getOperand(0), LL, LH);
|
|
SplitVectorOp(Node->getOperand(1), RL, RH);
|
|
|
|
Lo = DAG.getNode(Node->getOpcode(), MVT::Vector, LL, RL,
|
|
NewNumEltsNode, TypeNode);
|
|
Hi = DAG.getNode(Node->getOpcode(), MVT::Vector, LH, RH,
|
|
NewNumEltsNode, TypeNode);
|
|
break;
|
|
}
|
|
case ISD::VLOAD: {
|
|
SDOperand Ch = Node->getOperand(0); // Legalize the chain.
|
|
SDOperand Ptr = Node->getOperand(1); // Legalize the pointer.
|
|
MVT::ValueType EVT = cast<VTSDNode>(TypeNode)->getVT();
|
|
|
|
Lo = DAG.getVecLoad(NewNumElts, EVT, Ch, Ptr, Node->getOperand(2));
|
|
unsigned IncrementSize = NewNumElts * MVT::getSizeInBits(EVT)/8;
|
|
Ptr = DAG.getNode(ISD::ADD, Ptr.getValueType(), Ptr,
|
|
getIntPtrConstant(IncrementSize));
|
|
// FIXME: This creates a bogus srcvalue!
|
|
Hi = DAG.getVecLoad(NewNumElts, EVT, Ch, Ptr, Node->getOperand(2));
|
|
|
|
// Build a factor node to remember that this load is independent of the
|
|
// other one.
|
|
SDOperand TF = DAG.getNode(ISD::TokenFactor, MVT::Other, Lo.getValue(1),
|
|
Hi.getValue(1));
|
|
|
|
// Remember that we legalized the chain.
|
|
AddLegalizedOperand(Op.getValue(1), LegalizeOp(TF));
|
|
if (!TLI.isLittleEndian())
|
|
std::swap(Lo, Hi);
|
|
break;
|
|
}
|
|
case ISD::VBIT_CONVERT: {
|
|
// We know the result is a vector. The input may be either a vector or a
|
|
// scalar value.
|
|
if (Op.getOperand(0).getValueType() != MVT::Vector) {
|
|
// Lower to a store/load. FIXME: this could be improved probably.
|
|
SDOperand Ptr = CreateStackTemporary(Op.getOperand(0).getValueType());
|
|
|
|
SDOperand St = DAG.getNode(ISD::STORE, MVT::Other, DAG.getEntryNode(),
|
|
Op.getOperand(0), Ptr, DAG.getSrcValue(0));
|
|
MVT::ValueType EVT = cast<VTSDNode>(TypeNode)->getVT();
|
|
St = DAG.getVecLoad(NumElements, EVT, St, Ptr, DAG.getSrcValue(0));
|
|
SplitVectorOp(St, Lo, Hi);
|
|
} else {
|
|
// If the input is a vector type, we have to either scalarize it, pack it
|
|
// or convert it based on whether the input vector type is legal.
|
|
SDNode *InVal = Node->getOperand(0).Val;
|
|
unsigned NumElems =
|
|
cast<ConstantSDNode>(*(InVal->op_end()-2))->getValue();
|
|
MVT::ValueType EVT = cast<VTSDNode>(*(InVal->op_end()-1))->getVT();
|
|
|
|
// If the input is from a single element vector, scalarize the vector,
|
|
// then treat like a scalar.
|
|
if (NumElems == 1) {
|
|
SDOperand Scalar = PackVectorOp(Op.getOperand(0), EVT);
|
|
Scalar = DAG.getNode(ISD::VBIT_CONVERT, MVT::Vector, Scalar,
|
|
Op.getOperand(1), Op.getOperand(2));
|
|
SplitVectorOp(Scalar, Lo, Hi);
|
|
} else {
|
|
// Split the input vector.
|
|
SplitVectorOp(Op.getOperand(0), Lo, Hi);
|
|
|
|
// Convert each of the pieces now.
|
|
Lo = DAG.getNode(ISD::VBIT_CONVERT, MVT::Vector, Lo,
|
|
NewNumEltsNode, TypeNode);
|
|
Hi = DAG.getNode(ISD::VBIT_CONVERT, MVT::Vector, Hi,
|
|
NewNumEltsNode, TypeNode);
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
// Remember in a map if the values will be reused later.
|
|
bool isNew =
|
|
SplitNodes.insert(std::make_pair(Op, std::make_pair(Lo, Hi))).second;
|
|
assert(isNew && "Value already expanded?!?");
|
|
}
|
|
|
|
|
|
/// PackVectorOp - Given an operand of MVT::Vector type, convert it into the
|
|
/// equivalent operation that returns a scalar (e.g. F32) or packed value
|
|
/// (e.g. MVT::V4F32). When this is called, we know that PackedVT is the right
|
|
/// type for the result.
|
|
SDOperand SelectionDAGLegalize::PackVectorOp(SDOperand Op,
|
|
MVT::ValueType NewVT) {
|
|
// FIXME: THIS IS A TEMPORARY HACK
|
|
if (Op.getValueType() == NewVT) return Op;
|
|
|
|
assert(Op.getValueType() == MVT::Vector && "Bad PackVectorOp invocation!");
|
|
SDNode *Node = Op.Val;
|
|
|
|
// See if we already packed it.
|
|
std::map<SDOperand, SDOperand>::iterator I = PackedNodes.find(Op);
|
|
if (I != PackedNodes.end()) return I->second;
|
|
|
|
SDOperand Result;
|
|
switch (Node->getOpcode()) {
|
|
default:
|
|
Node->dump(); std::cerr << "\n";
|
|
assert(0 && "Unknown vector operation in PackVectorOp!");
|
|
case ISD::VADD:
|
|
case ISD::VSUB:
|
|
case ISD::VMUL:
|
|
case ISD::VSDIV:
|
|
case ISD::VUDIV:
|
|
case ISD::VAND:
|
|
case ISD::VOR:
|
|
case ISD::VXOR:
|
|
Result = DAG.getNode(getScalarizedOpcode(Node->getOpcode(), NewVT),
|
|
NewVT,
|
|
PackVectorOp(Node->getOperand(0), NewVT),
|
|
PackVectorOp(Node->getOperand(1), NewVT));
|
|
break;
|
|
case ISD::VLOAD: {
|
|
SDOperand Ch = LegalizeOp(Node->getOperand(0)); // Legalize the chain.
|
|
SDOperand Ptr = LegalizeOp(Node->getOperand(1)); // Legalize the pointer.
|
|
|
|
Result = DAG.getLoad(NewVT, Ch, Ptr, Node->getOperand(2));
|
|
|
|
// Remember that we legalized the chain.
|
|
AddLegalizedOperand(Op.getValue(1), LegalizeOp(Result.getValue(1)));
|
|
break;
|
|
}
|
|
case ISD::VBUILD_VECTOR:
|
|
if (!MVT::isVector(NewVT)) {
|
|
// Returning a scalar?
|
|
Result = Node->getOperand(0);
|
|
} else {
|
|
// Returning a BUILD_VECTOR?
|
|
std::vector<SDOperand> Ops(Node->op_begin(), Node->op_end()-2);
|
|
Result = DAG.getNode(ISD::BUILD_VECTOR, NewVT, Ops);
|
|
}
|
|
break;
|
|
case ISD::VINSERT_VECTOR_ELT:
|
|
if (!MVT::isVector(NewVT)) {
|
|
// Returning a scalar? Must be the inserted element.
|
|
Result = Node->getOperand(1);
|
|
} else {
|
|
Result = DAG.getNode(ISD::INSERT_VECTOR_ELT, NewVT,
|
|
PackVectorOp(Node->getOperand(0), NewVT),
|
|
Node->getOperand(1), Node->getOperand(2));
|
|
}
|
|
break;
|
|
case ISD::VBIT_CONVERT:
|
|
if (Op.getOperand(0).getValueType() != MVT::Vector)
|
|
Result = DAG.getNode(ISD::BIT_CONVERT, NewVT, Op.getOperand(0));
|
|
else {
|
|
// If the input is a vector type, we have to either scalarize it, pack it
|
|
// or convert it based on whether the input vector type is legal.
|
|
SDNode *InVal = Node->getOperand(0).Val;
|
|
unsigned NumElems =
|
|
cast<ConstantSDNode>(*(InVal->op_end()-2))->getValue();
|
|
MVT::ValueType EVT = cast<VTSDNode>(*(InVal->op_end()-1))->getVT();
|
|
|
|
// Figure out if there is a Packed type corresponding to this Vector
|
|
// type. If so, convert to the packed type.
|
|
MVT::ValueType TVT = MVT::getVectorType(EVT, NumElems);
|
|
if (TVT != MVT::Other && TLI.isTypeLegal(TVT)) {
|
|
// Turn this into a bit convert of the packed input.
|
|
Result = DAG.getNode(ISD::BIT_CONVERT, NewVT,
|
|
PackVectorOp(Node->getOperand(0), TVT));
|
|
break;
|
|
} else if (NumElems == 1) {
|
|
// Turn this into a bit convert of the scalar input.
|
|
Result = DAG.getNode(ISD::BIT_CONVERT, NewVT,
|
|
PackVectorOp(Node->getOperand(0), EVT));
|
|
break;
|
|
} else {
|
|
// FIXME: UNIMP!
|
|
assert(0 && "Cast from unsupported vector type not implemented yet!");
|
|
}
|
|
}
|
|
}
|
|
|
|
if (TLI.isTypeLegal(NewVT))
|
|
Result = LegalizeOp(Result);
|
|
bool isNew = PackedNodes.insert(std::make_pair(Op, Result)).second;
|
|
assert(isNew && "Value already packed?");
|
|
return Result;
|
|
}
|
|
|
|
|
|
// SelectionDAG::Legalize - This is the entry point for the file.
|
|
//
|
|
void SelectionDAG::Legalize() {
|
|
/// run - This is the main entry point to this class.
|
|
///
|
|
SelectionDAGLegalize(*this).LegalizeDAG();
|
|
}
|
|
|