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Makes the same change in ppc backend: avoid inserting prologue before debug labels.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@46596 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Evan Cheng 2008-01-31 03:33:38 +00:00
parent fa9b80eb64
commit 0a75538a68
1 changed files with 10 additions and 0 deletions
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10
lib/Target/PowerPC/PPCRegisterInfo.cpp
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@ -712,6 +712,16 @@ void PPCRegisterInfo::emitPrologue(MachineFunction &MF) const {
// Prepare for frame info.
unsigned FrameLabelId = 0;
// Skip over the labels which mark the beginning of the function.
if (MMI && MMI->needsFrameInfo()) {
unsigned NumLabels = 0;
while (NumLabels <= 1 &&
MBBI != MBB.end() && MBBI->getOpcode() == PPC::LABEL) {
++NumLabels;
++MBBI;
}
}
// Scan the prolog, looking for an UPDATE_VRSAVE instruction. If we find it,
// process it.
for (unsigned i = 0; MBBI != MBB.end(); ++i, ++MBBI) {