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Check the local frame alignment for determining whether dynamic stack

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alignment should be performed. Otherwise dynamic realignment may trigger
when the register allocator has already used the frame pointer as a general
purpose register. That is, we need to make sure that the list of reserved
registers doesn't change after register allocation.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@112986 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Jim Grosbach 2010-09-03 18:28:19 +00:00
parent 260fbf2b57
commit fc63300233
1 changed files with 1 additions and 1 deletions
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2
lib/Target/ARM/ARMBaseRegisterInfo.cpp
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@ -639,7 +639,7 @@ needsStackRealignment(const MachineFunction &MF) const {
const Function *F = MF.getFunction();
const ARMFunctionInfo *AFI = MF.getInfo<ARMFunctionInfo>();
unsigned StackAlign = MF.getTarget().getFrameInfo()->getStackAlignment();
bool requiresRealignment = ((MFI->getMaxAlignment() > StackAlign) ||
bool requiresRealignment = ((MFI->getLocalFrameMaxAlign() > StackAlign) ||
F->hasFnAttr(Attribute::StackAlignment));
// FIXME: Currently we don't support stack realignment for functions with