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DebugLabelFolder ruthlessly deletes redundant labels. However, sometimes the redundant labels is referenced by debug info somewhere else. This patch provies a way so that dwarf writer can mark labels as used.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@68813 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Devang Patel
2009-04-10 18:58:59 +00:00
parent ec15bbfd2f
commit 03f0a2fba0
2 changed files with 18 additions and 1 deletions
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2
lib/CodeGen/MachineModuleInfo.cpp
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@ -333,7 +333,7 @@ bool DebugLabelFolder::runOnMachineFunction(MachineFunction &MF) {
// Iterate through instructions.
for (MachineBasicBlock::iterator I = BB->begin(), E = BB->end(); I != E; ) {
// Is it a label.
if (I->isDebugLabel()) {
if (I->isDebugLabel() && !MMI->isDbgLabelUsed(I->getOperand(0).getImm())){
// The label ID # is always operand #0, an immediate.
unsigned NextLabel = I->getOperand(0).getImm();