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-Revert parts of 84326 and 84411. Distinquishing between fixed and non-fixed

Browse Source 
stack slots and giving them different PseudoSourceValue's did not fix the
problem of post-alloc scheduling miscompiling llvm itself.
- Apply Dan's conservative workaround by assuming any non fixed stack slots can
alias other memory locations. This means a load from spill slot #1 cannot 
move above a store of spill slot #2. 
- Enable post-alloc scheduling for x86 at optimization leverl Default and above.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@84424 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Evan Cheng 2009-10-18 18:16:27 +00:00
parent 20270c9093
commit ff89dcb06f
15 changed files with 93 additions and 93 deletions
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4
include/llvm/CodeGen/PseudoSourceValue.h
View File

@ -39,6 +39,10 @@ namespace llvm {
///
virtual bool isConstant(const MachineFrameInfo *) const;
/// isAliased - Test whether the memory pointed to by this
/// PseudoSourceValue may also be pointed to by an LLVM IR Value.
virtual bool isAliased() const;
/// classof - Methods for support type inquiry through isa, cast, and
/// dyn_cast:
///

19
lib/CodeGen/PseudoSourceValue.cpp
View File

@ -63,6 +63,8 @@ namespace {
virtual bool isConstant(const MachineFrameInfo *MFI) const;
virtual bool isAliased() const;
virtual void printCustom(raw_ostream &OS) const {
OS << "FixedStack" << FI;
}
@ -89,6 +91,23 @@ bool PseudoSourceValue::isConstant(const MachineFrameInfo *) const {
return false;
}
bool PseudoSourceValue::isAliased() const {
if (this == getStack() ||
this == getGOT() ||
this == getConstantPool() ||
this == getJumpTable())
return false;
llvm_unreachable("Unknown PseudoSourceValue!");
return true;
}
bool FixedStackPseudoSourceValue::isConstant(const MachineFrameInfo *MFI) const{
return MFI && MFI->isImmutableObjectIndex(FI);
}
bool FixedStackPseudoSourceValue::isAliased() const{
// Negative frame indices are used for special things that don't
// appear in LLVM IR. Non-negative indices may be used for things
// like static allocas.
return FI >= 0;
}

15
lib/CodeGen/ScheduleDAGInstrs.cpp
View File

@ -106,10 +106,19 @@ static const Value *getUnderlyingObjectForInstr(const MachineInstr *MI) {
return 0;
V = getUnderlyingObject(V);
if (!isa<PseudoSourceValue>(V) && !isIdentifiedObject(V))
return 0;
if (const PseudoSourceValue *PSV = dyn_cast<PseudoSourceValue>(V)) {
// For now, ignore PseudoSourceValues which may alias LLVM IR values
// because the code that uses this function has no way to cope with
// such aliases.
if (PSV->isAliased())
return 0;
return V;
}
return V;
if (isIdentifiedObject(V))
return V;
return 0;
}
void ScheduleDAGInstrs::StartBlock(MachineBasicBlock *BB) {

27
lib/CodeGen/SelectionDAG/LegalizeDAG.cpp
View File

@ -639,9 +639,11 @@ PerformInsertVectorEltInMemory(SDValue Vec, SDValue Val, SDValue Idx,
EVT PtrVT = TLI.getPointerTy();
SDValue StackPtr = DAG.CreateStackTemporary(VT);
int SPFI = cast<FrameIndexSDNode>(StackPtr.getNode())->getIndex();
// Store the vector.
SDValue Ch = DAG.getStore(DAG.getEntryNode(), dl, Tmp1, StackPtr,
PseudoSourceValue::getStack(), 0);
PseudoSourceValue::getFixedStack(SPFI), 0);
// Truncate or zero extend offset to target pointer type.
unsigned CastOpc = IdxVT.bitsGT(PtrVT) ? ISD::TRUNCATE : ISD::ZERO_EXTEND;
@ -652,10 +654,10 @@ PerformInsertVectorEltInMemory(SDValue Vec, SDValue Val, SDValue Idx,
SDValue StackPtr2 = DAG.getNode(ISD::ADD, dl, IdxVT, Tmp3, StackPtr);
// Store the scalar value.
Ch = DAG.getTruncStore(Ch, dl, Tmp2, StackPtr2,
PseudoSourceValue::getStack(), 0, EltVT);
PseudoSourceValue::getFixedStack(SPFI), 0, EltVT);
// Load the updated vector.
return DAG.getLoad(VT, dl, Ch, StackPtr,
PseudoSourceValue::getStack(), 0);
PseudoSourceValue::getFixedStack(SPFI), 0);
}
@ -1515,7 +1517,8 @@ SDValue SelectionDAGLegalize::ExpandVectorBuildThroughStack(SDNode* Node) {
EVT OpVT = Node->getOperand(0).getValueType();
DebugLoc dl = Node->getDebugLoc();
SDValue FIPtr = DAG.CreateStackTemporary(VT);
const Value *SV = PseudoSourceValue::getStack();
int FI = cast<FrameIndexSDNode>(FIPtr.getNode())->getIndex();
const Value *SV = PseudoSourceValue::getFixedStack(FI);
// Emit a store of each element to the stack slot.
SmallVector<SDValue, 8> Stores;
@ -1709,17 +1712,20 @@ SDValue SelectionDAGLegalize::EmitStackConvert(SDValue SrcOp,
getTypeForEVT(*DAG.getContext()));
SDValue FIPtr = DAG.CreateStackTemporary(SlotVT, SrcAlign);
FrameIndexSDNode *StackPtrFI = cast<FrameIndexSDNode>(FIPtr);
int SPFI = StackPtrFI->getIndex();
const Value *SV = PseudoSourceValue::getFixedStack(SPFI);
unsigned SrcSize = SrcOp.getValueType().getSizeInBits();
unsigned SlotSize = SlotVT.getSizeInBits();
unsigned DestSize = DestVT.getSizeInBits();
unsigned DestAlign =
TLI.getTargetData()->getPrefTypeAlignment(DestVT.
getTypeForEVT(*DAG.getContext()));
TLI.getTargetData()->getPrefTypeAlignment(DestVT.getTypeForEVT(*DAG.getContext()));
// Emit a store to the stack slot. Use a truncstore if the input value is
// later than DestVT.
SDValue Store;
const Value *SV = PseudoSourceValue::getStack();
if (SrcSize > SlotSize)
Store = DAG.getTruncStore(DAG.getEntryNode(), dl, SrcOp, FIPtr,
SV, 0, SlotVT, false, SrcAlign);
@ -1744,12 +1750,15 @@ SDValue SelectionDAGLegalize::ExpandSCALAR_TO_VECTOR(SDNode *Node) {
// then load the whole vector back out.
SDValue StackPtr = DAG.CreateStackTemporary(Node->getValueType(0));
FrameIndexSDNode *StackPtrFI = cast<FrameIndexSDNode>(StackPtr);
int SPFI = StackPtrFI->getIndex();
SDValue Ch = DAG.getTruncStore(DAG.getEntryNode(), dl, Node->getOperand(0),
StackPtr,
PseudoSourceValue::getStack(), 0,
PseudoSourceValue::getFixedStack(SPFI), 0,
Node->getValueType(0).getVectorElementType());
return DAG.getLoad(Node->getValueType(0), dl, Ch, StackPtr,
PseudoSourceValue::getStack(), 0);
PseudoSourceValue::getFixedStack(SPFI), 0);
}

3
lib/CodeGen/SelectionDAG/LegalizeTypesGeneric.cpp
View File

@ -118,7 +118,8 @@ void DAGTypeLegalizer::ExpandRes_BIT_CONVERT(SDNode *N, SDValue &Lo,
TLI.getTargetData()->getPrefTypeAlignment(NOutVT.
getTypeForEVT(*DAG.getContext()));
SDValue StackPtr = DAG.CreateStackTemporary(InVT, Alignment);
const Value *SV = PseudoSourceValue::getStack();
int SPFI = cast<FrameIndexSDNode>(StackPtr.getNode())->getIndex();
const Value *SV = PseudoSourceValue::getFixedStack(SPFI);
// Emit a store to the stack slot.
SDValue Store = DAG.getStore(DAG.getEntryNode(), dl, InOp, StackPtr, SV, 0);

3
lib/CodeGen/SelectionDAG/LegalizeVectorTypes.cpp
View File

@ -1057,7 +1057,8 @@ SDValue DAGTypeLegalizer::SplitVecOp_EXTRACT_VECTOR_ELT(SDNode *N) {
EVT EltVT = VecVT.getVectorElementType();
DebugLoc dl = N->getDebugLoc();
SDValue StackPtr = DAG.CreateStackTemporary(VecVT);
const Value *SV = PseudoSourceValue::getStack();
int SPFI = cast<FrameIndexSDNode>(StackPtr.getNode())->getIndex();
const Value *SV = PseudoSourceValue::getFixedStack(SPFI);
SDValue Store = DAG.getStore(DAG.getEntryNode(), dl, Vec, StackPtr, SV, 0);
// Load back the required element.

56
lib/CodeGen/SelectionDAG/SelectionDAG.cpp
View File

@ -3507,22 +3507,16 @@ SDValue SelectionDAG::getAtomic(unsigned Opcode, DebugLoc dl, EVT MemVT,
SDValue Ptr, SDValue Cmp,
SDValue Swp, const Value* PtrVal,
unsigned Alignment) {
MachineFunction &MF = getMachineFunction();
MachineFrameInfo *FrameInfo = MF.getFrameInfo();
if (Alignment == 0) // Ensure that codegen never sees alignment 0
Alignment = getEVTAlignment(MemVT);
// Check if the memory reference references a frame index
if (!PtrVal)
if (const FrameIndexSDNode *FI =
dyn_cast<const FrameIndexSDNode>(Ptr.getNode())) {
if (FrameInfo->isFixedObjectIndex(FI->getIndex()))
PtrVal = PseudoSourceValue::getFixedStack(FI->getIndex());
else
PtrVal = PseudoSourceValue::getStack();
}
dyn_cast<const FrameIndexSDNode>(Ptr.getNode()))
PtrVal = PseudoSourceValue::getFixedStack(FI->getIndex());
MachineFunction &MF = getMachineFunction();
unsigned Flags = MachineMemOperand::MOLoad | MachineMemOperand::MOStore;
// For now, atomics are considered to be volatile always.
@ -3566,21 +3560,16 @@ SDValue SelectionDAG::getAtomic(unsigned Opcode, DebugLoc dl, EVT MemVT,
SDValue Ptr, SDValue Val,
const Value* PtrVal,
unsigned Alignment) {
MachineFunction &MF = getMachineFunction();
MachineFrameInfo *FrameInfo = MF.getFrameInfo();
if (Alignment == 0) // Ensure that codegen never sees alignment 0
Alignment = getEVTAlignment(MemVT);
// Check if the memory reference references a frame index
if (!PtrVal)
if (const FrameIndexSDNode *FI =
dyn_cast<const FrameIndexSDNode>(Ptr.getNode()))
if (FrameInfo->isFixedObjectIndex(FI->getIndex()))
PtrVal = PseudoSourceValue::getFixedStack(FI->getIndex());
else
PtrVal = PseudoSourceValue::getStack();
dyn_cast<const FrameIndexSDNode>(Ptr.getNode()))
PtrVal = PseudoSourceValue::getFixedStack(FI->getIndex());
MachineFunction &MF = getMachineFunction();
unsigned Flags = MachineMemOperand::MOLoad | MachineMemOperand::MOStore;
// For now, atomics are considered to be volatile always.
@ -3718,21 +3707,16 @@ SelectionDAG::getLoad(ISD::MemIndexedMode AM, DebugLoc dl,
SDValue Ptr, SDValue Offset,
const Value *SV, int SVOffset, EVT MemVT,
bool isVolatile, unsigned Alignment) {
MachineFunction &MF = getMachineFunction();
MachineFrameInfo *FrameInfo = MF.getFrameInfo();
if (Alignment == 0) // Ensure that codegen never sees alignment 0
Alignment = getEVTAlignment(VT);
// Check if the memory reference references a frame index
if (!SV)
if (const FrameIndexSDNode *FI =
dyn_cast<const FrameIndexSDNode>(Ptr.getNode()))
if (FrameInfo->isFixedObjectIndex(FI->getIndex()))
SV = PseudoSourceValue::getFixedStack(FI->getIndex());
else
SV = PseudoSourceValue::getStack();
dyn_cast<const FrameIndexSDNode>(Ptr.getNode()))
SV = PseudoSourceValue::getFixedStack(FI->getIndex());
MachineFunction &MF = getMachineFunction();
unsigned Flags = MachineMemOperand::MOLoad;
if (isVolatile)
Flags |= MachineMemOperand::MOVolatile;
@ -3822,21 +3806,16 @@ SelectionDAG::getIndexedLoad(SDValue OrigLoad, DebugLoc dl, SDValue Base,
SDValue SelectionDAG::getStore(SDValue Chain, DebugLoc dl, SDValue Val,
SDValue Ptr, const Value *SV, int SVOffset,
bool isVolatile, unsigned Alignment) {
MachineFunction &MF = getMachineFunction();
MachineFrameInfo *FrameInfo = MF.getFrameInfo();
if (Alignment == 0) // Ensure that codegen never sees alignment 0
Alignment = getEVTAlignment(Val.getValueType());
// Check if the memory reference references a frame index
if (!SV)
if (const FrameIndexSDNode *FI =
dyn_cast<const FrameIndexSDNode>(Ptr.getNode()))
if (FrameInfo->isFixedObjectIndex(FI->getIndex()))
SV = PseudoSourceValue::getFixedStack(FI->getIndex());
else
SV = PseudoSourceValue::getStack();
dyn_cast<const FrameIndexSDNode>(Ptr.getNode()))
SV = PseudoSourceValue::getFixedStack(FI->getIndex());
MachineFunction &MF = getMachineFunction();
unsigned Flags = MachineMemOperand::MOStore;
if (isVolatile)
Flags |= MachineMemOperand::MOVolatile;
@ -3873,21 +3852,16 @@ SDValue SelectionDAG::getTruncStore(SDValue Chain, DebugLoc dl, SDValue Val,
SDValue Ptr, const Value *SV,
int SVOffset, EVT SVT,
bool isVolatile, unsigned Alignment) {
MachineFunction &MF = getMachineFunction();
MachineFrameInfo *FrameInfo = MF.getFrameInfo();
if (Alignment == 0) // Ensure that codegen never sees alignment 0
Alignment = getEVTAlignment(SVT);
// Check if the memory reference references a frame index
if (!SV)
if (const FrameIndexSDNode *FI =
dyn_cast<const FrameIndexSDNode>(Ptr.getNode()))
if (FrameInfo->isFixedObjectIndex(FI->getIndex()))
SV = PseudoSourceValue::getFixedStack(FI->getIndex());
else
SV = PseudoSourceValue::getStack();
dyn_cast<const FrameIndexSDNode>(Ptr.getNode()))
SV = PseudoSourceValue::getFixedStack(FI->getIndex());
MachineFunction &MF = getMachineFunction();
unsigned Flags = MachineMemOperand::MOStore;
if (isVolatile)
Flags |= MachineMemOperand::MOVolatile;

6
lib/CodeGen/SelectionDAG/SelectionDAGBuild.cpp
View File

@ -4196,11 +4196,9 @@ SelectionDAGLowering::visitIntrinsicCall(CallInst &I, unsigned Intrinsic) {
SDValue FIN = DAG.getFrameIndex(FI, PtrTy);
// Store the stack protector onto the stack.
const Value *SV = MFI->isFixedObjectIndex(FI)
? PseudoSourceValue::getFixedStack(FI)
: PseudoSourceValue::getStack();
SDValue Result = DAG.getStore(getRoot(), getCurDebugLoc(), Src, FIN,
SV, 0, true);
PseudoSourceValue::getFixedStack(FI),
0, true);
setValue(&I, Result);
DAG.setRoot(Result);
return 0;

6
lib/CodeGen/StackSlotColoring.cpp
View File

@ -466,10 +466,8 @@ void StackSlotColoring::RewriteInstruction(MachineInstr *MI, int OldFI,
// Update the memory references. This changes the MachineMemOperands
// directly. They may be in use by multiple instructions, however all
// instructions using OldFI are being rewritten to use NewFI.
const Value *OldSV = MFI->isFixedObjectIndex(OldFI)
? PseudoSourceValue::getFixedStack(OldFI) : PseudoSourceValue::getStack();
const Value *NewSV = MFI->isFixedObjectIndex(NewFI)
? PseudoSourceValue::getFixedStack(NewFI) : PseudoSourceValue::getStack();
const Value *OldSV = PseudoSourceValue::getFixedStack(OldFI);
const Value *NewSV = PseudoSourceValue::getFixedStack(NewFI);
for (MachineInstr::mmo_iterator I = MI->memoperands_begin(),
E = MI->memoperands_end(); I != E; ++I)
if ((*I)->getValue() == OldSV)

5
lib/CodeGen/TargetInstrInfoImpl.cpp
View File

@ -186,11 +186,8 @@ TargetInstrInfo::foldMemoryOperand(MachineFunction &MF,
"Folded a use to a non-load!");
const MachineFrameInfo &MFI = *MF.getFrameInfo();
assert(MFI.getObjectOffset(FrameIndex) != -1);
const Value *SV = MFI.isFixedObjectIndex(FrameIndex)
? PseudoSourceValue::getFixedStack(FrameIndex)
: PseudoSourceValue::getStack();
MachineMemOperand *MMO =
MF.getMachineMemOperand(SV,
MF.getMachineMemOperand(PseudoSourceValue::getFixedStack(FrameIndex),
Flags, /*Offset=*/0,
MFI.getObjectSize(FrameIndex),
MFI.getObjectAlignment(FrameIndex));

10
lib/Target/ARM/ARMBaseInstrInfo.cpp
View File

@ -670,11 +670,8 @@ storeRegToStackSlot(MachineBasicBlock &MBB, MachineBasicBlock::iterator I,
MachineFunction &MF = *MBB.getParent();
MachineFrameInfo &MFI = *MF.getFrameInfo();
const Value *SV = (MFI.isFixedObjectIndex(FI) ||
MFI.isSpillSlotObjectIndex(FI))
? PseudoSourceValue::getFixedStack(FI) : PseudoSourceValue::getStack();
MachineMemOperand *MMO =
MF.getMachineMemOperand(SV,
MF.getMachineMemOperand(PseudoSourceValue::getFixedStack(FI),
MachineMemOperand::MOStore, 0,
MFI.getObjectSize(FI),
MFI.getObjectAlignment(FI));
@ -711,11 +708,8 @@ loadRegFromStackSlot(MachineBasicBlock &MBB, MachineBasicBlock::iterator I,
MachineFunction &MF = *MBB.getParent();
MachineFrameInfo &MFI = *MF.getFrameInfo();
const Value *SV = (MFI.isFixedObjectIndex(FI) ||
MFI.isSpillSlotObjectIndex(FI))
? PseudoSourceValue::getFixedStack(FI) : PseudoSourceValue::getStack();
MachineMemOperand *MMO =
MF.getMachineMemOperand(SV,
MF.getMachineMemOperand(PseudoSourceValue::getFixedStack(FI),
MachineMemOperand::MOLoad, 0,
MFI.getObjectSize(FI),
MFI.getObjectAlignment(FI));

4
lib/Target/PowerPC/PPCISelLowering.cpp
View File

@ -2225,7 +2225,7 @@ struct TailCallArgumentInfo {
/// StoreTailCallArgumentsToStackSlot - Stores arguments to their stack slot.
static void
StoreTailCallArgumentsToStackSlot(SelectionDAG &DAG,
SDValue Chain,
SDValue Chain,
const SmallVector<TailCallArgumentInfo, 8> &TailCallArgs,
SmallVector<SDValue, 8> &MemOpChains,
DebugLoc dl) {
@ -3388,7 +3388,7 @@ SDValue PPCTargetLowering::LowerSINT_TO_FP(SDValue Op, SelectionDAG &DAG) {
// STD the extended value into the stack slot.
MachineMemOperand *MMO =
MF.getMachineMemOperand(PseudoSourceValue::getStack(),
MF.getMachineMemOperand(PseudoSourceValue::getFixedStack(FrameIdx),
MachineMemOperand::MOStore, 0, 8, 8);
SDValue Ops[] = { DAG.getEntryNode(), Ext64, FIdx };
SDValue Store =

21
lib/Target/X86/X86ISelLowering.cpp
View File

@ -1562,7 +1562,7 @@ X86TargetLowering::LowerFormalArguments(SDValue Chain,
SDValue Val = DAG.getCopyFromReg(Chain, dl, VReg, MVT::i64);
SDValue Store =
DAG.getStore(Val.getValue(1), dl, Val, FIN,
PseudoSourceValue::getStack(),
PseudoSourceValue::getFixedStack(RegSaveFrameIndex),
Offset);
MemOps.push_back(Store);
Offset += 8;
@ -1765,8 +1765,9 @@ X86TargetLowering::LowerCall(SDValue Chain, SDValue Callee,
case CCValAssign::Indirect: {
// Store the argument.
SDValue SpillSlot = DAG.CreateStackTemporary(VA.getValVT());
int FI = cast<FrameIndexSDNode>(SpillSlot)->getIndex();
Chain = DAG.getStore(Chain, dl, Arg, SpillSlot,
PseudoSourceValue::getStack(), 0);
PseudoSourceValue::getFixedStack(FI), 0);
Arg = SpillSlot;
break;
}
@ -4867,7 +4868,7 @@ SDValue X86TargetLowering::LowerSINT_TO_FP(SDValue Op, SelectionDAG &DAG) {
SDValue StackSlot = DAG.getFrameIndex(SSFI, getPointerTy());
SDValue Chain = DAG.getStore(DAG.getEntryNode(), dl, Op.getOperand(0),
StackSlot,
PseudoSourceValue::getStack(), 0);
PseudoSourceValue::getFixedStack(SSFI), 0);
return BuildFILD(Op, SrcVT, Chain, StackSlot, DAG);
}
@ -4908,7 +4909,7 @@ SDValue X86TargetLowering::BuildFILD(SDValue Op, EVT SrcVT, SDValue Chain,
Ops.push_back(InFlag);
Chain = DAG.getNode(X86ISD::FST, dl, Tys, &Ops[0], Ops.size());
Result = DAG.getLoad(Op.getValueType(), dl, Chain, StackSlot,
PseudoSourceValue::getStack(), 0);
PseudoSourceValue::getFixedStack(SSFI), 0);
}
return Result;
@ -5123,7 +5124,7 @@ FP_TO_INTHelper(SDValue Op, SelectionDAG &DAG, bool IsSigned) {
if (isScalarFPTypeInSSEReg(Op.getOperand(0).getValueType())) {
assert(DstTy == MVT::i64 && "Invalid FP_TO_SINT to lower!");
Chain = DAG.getStore(Chain, dl, Value, StackSlot,
PseudoSourceValue::getStack(), 0);
PseudoSourceValue::getFixedStack(SSFI), 0);
SDVTList Tys = DAG.getVTList(Op.getOperand(0).getValueType(), MVT::Other);
SDValue Ops[] = {
Chain, StackSlot, DAG.getValueType(Op.getOperand(0).getValueType())
@ -7718,7 +7719,6 @@ X86TargetLowering::EmitVAStartSaveXMMRegsWithCustomInserter(
// stores were performed.
const BasicBlock *LLVM_BB = MBB->getBasicBlock();
MachineFunction *F = MBB->getParent();
MachineFrameInfo *MFI = F->getFrameInfo();
MachineFunction::iterator MBBIter = MBB;
++MBBIter;
MachineBasicBlock *XMMSaveMBB = F->CreateMachineBasicBlock(LLVM_BB);
@ -7750,14 +7750,13 @@ X86TargetLowering::EmitVAStartSaveXMMRegsWithCustomInserter(
}
// In the XMM save block, save all the XMM argument registers.
const Value *SV = MFI->isFixedObjectIndex(RegSaveFrameIndex)
? PseudoSourceValue::getFixedStack(RegSaveFrameIndex)
: PseudoSourceValue::getStack();
for (int i = 3, e = MI->getNumOperands(); i != e; ++i) {
int64_t Offset = (i - 3) * 16 + VarArgsFPOffset;
MachineMemOperand *MMO =
F->getMachineMemOperand(SV, MachineMemOperand::MOStore, Offset,
/*Size=*/16, /*Align=*/16);
F->getMachineMemOperand(
PseudoSourceValue::getFixedStack(RegSaveFrameIndex),
MachineMemOperand::MOStore, Offset,
/*Size=*/16, /*Align=*/16);
BuildMI(XMMSaveMBB, DL, TII->get(X86::MOVAPSmr))
.addFrameIndex(RegSaveFrameIndex)
.addImm(/*Scale=*/1)

5
lib/Target/X86/X86InstrBuilder.h
View File

@ -143,11 +143,8 @@ addFrameReference(const MachineInstrBuilder &MIB, int FI, int Offset = 0) {
Flags |= MachineMemOperand::MOLoad;
if (TID.mayStore())
Flags |= MachineMemOperand::MOStore;
const Value *SV = (MFI.isFixedObjectIndex(FI) ||
MFI.isSpillSlotObjectIndex(FI))
? PseudoSourceValue::getFixedStack(FI) : PseudoSourceValue::getStack();
MachineMemOperand *MMO =
MF.getMachineMemOperand(SV,
MF.getMachineMemOperand(PseudoSourceValue::getFixedStack(FI),
Flags, Offset,
MFI.getObjectSize(FI),
MFI.getObjectAlignment(FI));

2
lib/Target/X86/X86Subtarget.h
View File

@ -220,7 +220,7 @@ public:
/// at 'More' optimization level.
bool enablePostRAScheduler(CodeGenOpt::Level OptLevel) const {
// FIXME: This causes llvm to miscompile itself on i386. :-(
return false/*OptLevel >= CodeGenOpt::Default*/;
return OptLevel >= CodeGenOpt::Default;
}
};