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| author | Evan Cheng <evan.cheng@apple.com> | 2007-12-12 00:51:06 +0000 |
|---|---|---|
| committer | Evan Cheng <evan.cheng@apple.com> | 2007-12-12 00:51:06 +0000 |
| commit | 7bc894253220b1b4469f846a37cf6855f2ecd673 (patch) | |
| tree | 30014fd737cd6b1a14db039cf8cdde30bf4cfc77 /llvm/lib/Transforms/Scalar/CodeGenPrepare.cpp | |
| parent | 0af43a189528f7a8feb9129fcb8df1d9859e1b24 (diff) | |
| download | bcm5719-llvm-7bc894253220b1b4469f846a37cf6855f2ecd673.tar.gz bcm5719-llvm-7bc894253220b1b4469f846a37cf6855f2ecd673.zip | |
Bug fix. Only safe to perform extension uses optimization if the source of extension is also defined in the same BB as the extension.
llvm-svn: 44896
Diffstat (limited to 'llvm/lib/Transforms/Scalar/CodeGenPrepare.cpp')
| -rw-r--r-- | llvm/lib/Transforms/Scalar/CodeGenPrepare.cpp | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/llvm/lib/Transforms/Scalar/CodeGenPrepare.cpp b/llvm/lib/Transforms/Scalar/CodeGenPrepare.cpp index 594c017ba8a..37a645f3ce8 100644 --- a/llvm/lib/Transforms/Scalar/CodeGenPrepare.cpp +++ b/llvm/lib/Transforms/Scalar/CodeGenPrepare.cpp @@ -929,6 +929,11 @@ bool CodeGenPrepare::OptimizeExtUses(Instruction *I) { if (Src->hasOneUse()) return false; + // Only safe to perform the optimization if the source is also defined in + // this block. + if (DefBB != cast<Instruction>(Src)->getParent()) + return false; + bool DefIsLiveOut = false; for (Value::use_iterator UI = I->use_begin(), E = I->use_end(); UI != E; ++UI) { |
