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Try to not lose variable's debug info during instcombine.

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This is done by lowering dbg.declare intrinsic into dbg.value intrinsic.
Radar 9143931.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@127834 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Devang Patel
2011-03-17 22:18:16 +00:00
parent e68d8ec252
commit 813c9a0f19
4 changed files with 92 additions and 0 deletions
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4
lib/Transforms/InstCombine/InstructionCombining.cpp
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@@ -1648,6 +1648,10 @@ bool InstCombiner::runOnFunction(Function &F) {
bool EverMadeChange = false;
// Lower dbg.declare intrinsics otherwise their value may be clobbered
// by instcombiner.
EverMadeChange = LowerDbgDeclare(F);
// Iterate while there is work to do.
unsigned Iteration = 0;
while (DoOneIteration(F, Iteration++))