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The isLoadFromStackSlot and isStoreToStackSlot have no way of reporting

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subregister operands like this:

%reg1040:sub_32bit<def> = MOV32rm <fi#-2>, 1, %reg0, 0, %reg0, %reg1040<imp-def>; mem:LD4[FixedStack-2](align=8)

Make them return false when subreg operands are present. VirtRegRewriter is
making bad assumptions otherwise.

This fixes PR7713.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@109489 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Jakob Stoklund Olesen 2010-07-27 04:17:01 +00:00
parent 516cd4575e
commit 81c7b19f04
1 changed files with 3 additions and 2 deletions
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5
lib/Target/X86/X86InstrInfo.cpp
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@ -787,7 +787,7 @@ static bool isFrameStoreOpcode(int Opcode) {
unsigned X86InstrInfo::isLoadFromStackSlot(const MachineInstr *MI,
int &FrameIndex) const {
if (isFrameLoadOpcode(MI->getOpcode()))
if (isFrameOperand(MI, 1, FrameIndex))
if (MI->getOperand(0).getSubReg() == 0 && isFrameOperand(MI, 1, FrameIndex))
return MI->getOperand(0).getReg();
return 0;
}
@ -826,7 +826,8 @@ bool X86InstrInfo::hasLoadFromStackSlot(const MachineInstr *MI,
unsigned X86InstrInfo::isStoreToStackSlot(const MachineInstr *MI,
int &FrameIndex) const {
if (isFrameStoreOpcode(MI->getOpcode()))
if (isFrameOperand(MI, 0, FrameIndex))
if (MI->getOperand(X86::AddrNumOperands).getSubReg() == 0 &&
isFrameOperand(MI, 0, FrameIndex))
return MI->getOperand(X86::AddrNumOperands).getReg();
return 0;
}