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| author | Cameron Zwarich <zwarich@apple.com> | 2011-03-24 16:34:59 +0000 |
|---|---|---|
| committer | Cameron Zwarich <zwarich@apple.com> | 2011-03-24 16:34:59 +0000 |
| commit | 903548420016325db6d22328687f78cd4180facb (patch) | |
| tree | df78307840ee333d2528092ef8a52573931ec0f5 | |
| parent | 0d4b81519dc3f02bbebb4ecad86bfb590c4d1898 (diff) | |
| download | external_llvm-903548420016325db6d22328687f78cd4180facb.zip external_llvm-903548420016325db6d22328687f78cd4180facb.tar.gz external_llvm-903548420016325db6d22328687f78cd4180facb.tar.bz2 | |
Debug intrinsics must be skipped at the beginning and ends of blocks, lest they
affect the generated code.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@128217 91177308-0d34-0410-b5e6-96231b3b80d8
| -rw-r--r-- | lib/Transforms/Scalar/CodeGenPrepare.cpp | 8 |
1 files changed, 6 insertions, 2 deletions
diff --git a/lib/Transforms/Scalar/CodeGenPrepare.cpp b/lib/Transforms/Scalar/CodeGenPrepare.cpp index 337a4d3..2f7ccea 100644 --- a/lib/Transforms/Scalar/CodeGenPrepare.cpp +++ b/lib/Transforms/Scalar/CodeGenPrepare.cpp @@ -617,7 +617,9 @@ bool CodeGenPrepare::DupRetToEnableTailCallOpts(ReturnInst *RI) { if (&*BI != RI) return false; } else { - if (&*BB->begin() != RI) + BasicBlock::iterator BI = BB->begin(); + while (isa<DbgInfoIntrinsic>(BI)) ++BI; + if (&*BI != RI) return false; } @@ -641,8 +643,10 @@ bool CodeGenPrepare::DupRetToEnableTailCallOpts(ReturnInst *RI) { BasicBlock::InstListType &InstList = (*PI)->getInstList(); BasicBlock::InstListType::reverse_iterator RI = InstList.rbegin(); BasicBlock::InstListType::reverse_iterator RE = InstList.rend(); - if (++RI == RE) + do { ++RI; } while (RI != RE && isa<DbgInfoIntrinsic>(&*RI)); + if (RI == RE) continue; + CallInst *CI = dyn_cast<CallInst>(&*RI); if (CI && CI->use_empty() && TLI->mayBeEmittedAsTailCall(CI)) TailCalls.push_back(CI); |