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Round up stack to multiple of alignment only if it's a leaf function without alloca.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@33401 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Evan Cheng 2007-01-20 10:22:33 +00:00
parent 2bd7b2b41f
commit 515674c7b6
1 changed files with 7 additions and 4 deletions
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5
lib/Target/ARM/ARMRegisterInfo.cpp
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@ -917,14 +917,17 @@ void ARMRegisterInfo::emitPrologue(MachineFunction &MF) const {
// If necessary, add one more SUBri to account for the call frame
// and/or local storage, alloca area.
if (MFI->hasCalls() && !hasFP(MF))
if (MFI->hasCalls() || MF.getFrameInfo()->hasVarSizedObjects()) {
// We reserve argument space for call sites in the function immediately on
// entry to the current function. This eliminates the need for add/sub
// brackets around call sites.
if (!hasFP(MF))
NumBytes += MFI->getMaxCallFrameSize();
// Round the size to a multiple of the alignment.
NumBytes = (NumBytes+Align-1)/Align*Align;
}
MFI->setStackSize(NumBytes);
// Determine starting offsets of spill areas.