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During folding for patchpoint/stackmap instructions, defer creation of new MIs

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until we know that folding will be successful.

No functional change.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@194880 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Lang Hames 2013-11-15 23:13:21 +00:00
parent 14f41e7e18
commit 8c66df2c7a
1 changed files with 5 additions and 4 deletions
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9
lib/Target/X86/X86InstrInfo.cpp
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@ -4207,10 +4207,6 @@ static MachineInstr* foldPatchpoint(MachineFunction &MF,
!MI->getOperand(0).isImplicit();
unsigned StartIdx = hasDef ? 1 : 0;
MachineInstr *NewMI =
MF.CreateMachineInstr(TII.get(MI->getOpcode()), MI->getDebugLoc(), true);
MachineInstrBuilder MIB(MF, NewMI);
switch (MI->getOpcode()) {
case TargetOpcode::STACKMAP:
StartIdx += 2; // Skip ID, nShadowBytes.
@ -4231,6 +4227,11 @@ static MachineInstr* foldPatchpoint(MachineFunction &MF,
if (*I < StartIdx)
return 0;
}
MachineInstr *NewMI =
MF.CreateMachineInstr(TII.get(MI->getOpcode()), MI->getDebugLoc(), true);
MachineInstrBuilder MIB(MF, NewMI);
// No need to fold return, the meta data, and function arguments
for (unsigned i = 0; i < StartIdx; ++i)
MIB.addOperand(MI->getOperand(i));