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ARMBaseRegisterInfo::hasFP() has been broken for a while now. :-(

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This will always be false before PEI:
(DisableFramePointerElim(MF) && MFI->adjustsStack())
Which means it's going to make r11 available as a general purpose register even
if -disable-fp-elim is specified. It's working on Darwin only because r7 is
always reserved. But it's obviously broken for other targets.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@110614 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Evan Cheng 2010-08-09 22:32:45 +00:00
parent 93f6c1ec6e
commit b000d683c8
1 changed files with 2 additions and 1 deletions
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3
lib/Target/ARM/ARMBaseRegisterInfo.cpp
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@ -611,7 +611,8 @@ ARMBaseRegisterInfo::UpdateRegAllocHint(unsigned Reg, unsigned NewReg,
///
bool ARMBaseRegisterInfo::hasFP(const MachineFunction &MF) const {
const MachineFrameInfo *MFI = MF.getFrameInfo();
return ((DisableFramePointerElim(MF) && MFI->adjustsStack())||
// Always eliminate non-leaf frame pointers.
return ((DisableFramePointerElim(MF) && MFI->hasCalls()) ||
needsStackRealignment(MF) ||
MFI->hasVarSizedObjects() ||
MFI->isFrameAddressTaken());