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Preserve debug info for unused zero extended boolean argument.

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Radar 9422775.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@131422 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Devang Patel
2011-05-16 21:24:05 +00:00
parent cacdc4fc41
commit 227dfdb3c4
2 changed files with 40 additions and 10 deletions
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17
lib/Transforms/Utils/Local.cpp
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@@ -785,10 +785,19 @@ bool llvm::ConvertDebugDeclareToDebugValue(DbgDeclareInst *DDI,
if (!DIVar.Verify())
return false;
Instruction *DbgVal =
Builder.insertDbgValueIntrinsic(SI->getOperand(0), 0,
DIVar, SI);
Instruction *DbgVal = NULL;
// If an argument is zero extended then use argument directly. The ZExt
// may be zapped by an optimization pass in future.
Argument *ExtendedArg = NULL;
if (ZExtInst *ZExt = dyn_cast<ZExtInst>(SI->getOperand(0)))
ExtendedArg = dyn_cast<Argument>(ZExt->getOperand(0));
if (SExtInst *SExt = dyn_cast<SExtInst>(SI->getOperand(0)))
ExtendedArg = dyn_cast<Argument>(SExt->getOperand(0));
if (ExtendedArg)
DbgVal = Builder.insertDbgValueIntrinsic(ExtendedArg, 0, DIVar, SI);
else
DbgVal = Builder.insertDbgValueIntrinsic(SI->getOperand(0), 0, DIVar, SI);
// Propagate any debug metadata from the store onto the dbg.value.
DebugLoc SIDL = SI->getDebugLoc();
if (!SIDL.isUnknown())