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author | Shuxin Yang <shuxin.llvm@gmail.com> | 2013-01-10 23:32:01 +0000 |
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committer | Shuxin Yang <shuxin.llvm@gmail.com> | 2013-01-10 23:32:01 +0000 |
commit | c5c730b0e054de89cbd1ad710157c41e8b5c4381 (patch) | |
tree | 3e9509c77ca377350e8c5ffbdf5c3296afe2a907 /llvm/lib/Transforms/Scalar/LoopIdiomRecognize.cpp | |
parent | cc7f008b850b301910132f94224dc02e32418f67 (diff) | |
download | bcm5719-llvm-c5c730b0e054de89cbd1ad710157c41e8b5c4381.tar.gz bcm5719-llvm-c5c730b0e054de89cbd1ad710157c41e8b5c4381.zip |
PR14904: Segmentation fault running pass 'Recognize loop idioms'
The root cause is mistakenly taking for granted that
"dyn_cast<Instruction>(a-Value)"
return a non-NULL instruction.
llvm-svn: 172145
Diffstat (limited to 'llvm/lib/Transforms/Scalar/LoopIdiomRecognize.cpp')
-rw-r--r-- | llvm/lib/Transforms/Scalar/LoopIdiomRecognize.cpp | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/llvm/lib/Transforms/Scalar/LoopIdiomRecognize.cpp b/llvm/lib/Transforms/Scalar/LoopIdiomRecognize.cpp index c4f90125ac5..8258719a020 100644 --- a/llvm/lib/Transforms/Scalar/LoopIdiomRecognize.cpp +++ b/llvm/lib/Transforms/Scalar/LoopIdiomRecognize.cpp @@ -407,7 +407,7 @@ bool NclPopcountRecognize::detectIdiom(Instruction *&CntInst, // step 2: detect instructions corresponding to "x2 = x1 & (x1 - 1)" { - if (DefX2->getOpcode() != Instruction::And) + if (!DefX2 || DefX2->getOpcode() != Instruction::And) return false; BinaryOperator *SubOneOp; |