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Treat the label for the first @llvm.dbg.stoppoint the same way as the dbg_func_start label. Make sure nothing else is inserted before them.

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Note this solution might be somewhat fragile since ISD::LABEL may be used for other
purposes. If that ends up to be an issue, we may need to introduce a different node
for debug labels.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@46571 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Evan Cheng 2008-01-30 20:08:35 +00:00
parent 43b8f3b7d3
commit 965d1b4bba
2 changed files with 12 additions and 8 deletions
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8
lib/CodeGen/SelectionDAG/ScheduleDAG.cpp
View File

@ -716,16 +716,16 @@ void ScheduleDAG::EmitNode(SDNode *Node, unsigned InstanceNo,
// If we are inserting a LABEL and this happens to be the first label in
// the entry block, it is the "function start" label. Make sure there are
// no other instructions before it.
bool SeenLabel = false;
unsigned NumLabels = 0;
MachineBasicBlock::iterator MBBI = BB->begin();
while (MBBI != BB->end()) {
if (MBBI->getOpcode() == TargetInstrInfo::LABEL) {
SeenLabel = true;
break;
if (++NumLabels > 1)
break;
}
++MBBI;
}
if (!SeenLabel)
if (NumLabels <= 1)
BB->insert(BB->begin(), MI);
else
BB->push_back(MI);

12
lib/Target/X86/X86RegisterInfo.cpp
View File

@ -525,11 +525,15 @@ void X86RegisterInfo::emitPrologue(MachineFunction &MF) const {
X86FI->getCalleeSavedFrameSize() +(-TailCallReturnAddrDelta));
uint64_t NumBytes = StackSize - X86FI->getCalleeSavedFrameSize();
// Skip over the label which mark the beginning of the function.
if (MMI && MMI->needsFrameInfo() &&
MBBI != MBB.end() &&
MBBI->getOpcode() == X86::LABEL)
// 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() == X86::LABEL) {
++NumLabels;
++MBBI;
}
}
// Insert stack pointer adjustment for later moving of return addr. Only
// applies to tail call optimized functions where the callee argument stack