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| author | Duncan Sands <baldrick@free.fr> | 2009-05-06 06:49:50 +0000 |
|---|---|---|
| committer | Duncan Sands <baldrick@free.fr> | 2009-05-06 06:49:50 +0000 |
| commit | 2f50083a5a30363d5e6e7ae34f7b0615d419860d (patch) | |
| tree | 36e5d75294f6632cb5486c95675e0f2b6d13de86 /lib/Transforms/Scalar/LoopDeletion.cpp | |
| parent | 905a30bc1c09d1501716dc3d12053a93fabaaefe (diff) | |
| download | external_llvm-2f50083a5a30363d5e6e7ae34f7b0615d419860d.zip external_llvm-2f50083a5a30363d5e6e7ae34f7b0615d419860d.tar.gz external_llvm-2f50083a5a30363d5e6e7ae34f7b0615d419860d.tar.bz2 | |
Allow readonly functions to unwind exceptions. Teach
the optimizers about this. For example, a readonly
function with no uses cannot be removed unless it is
also marked nounwind.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@71071 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/Transforms/Scalar/LoopDeletion.cpp')
| -rw-r--r-- | lib/Transforms/Scalar/LoopDeletion.cpp | 5 |
1 files changed, 1 insertions, 4 deletions
diff --git a/lib/Transforms/Scalar/LoopDeletion.cpp b/lib/Transforms/Scalar/LoopDeletion.cpp index 96b7a52..6512672 100644 --- a/lib/Transforms/Scalar/LoopDeletion.cpp +++ b/lib/Transforms/Scalar/LoopDeletion.cpp @@ -136,11 +136,8 @@ bool LoopDeletion::IsLoopDead(Loop* L, LI != LE; ++LI) { for (BasicBlock::iterator BI = (*LI)->begin(), BE = (*LI)->end(); BI != BE; ++BI) { - if (BI->mayWriteToMemory()) + if (BI->mayHaveSideEffects()) return false; - else if (LoadInst* L = dyn_cast<LoadInst>(BI)) - if (L->isVolatile()) - return false; } } |