diff options
Diffstat (limited to 'lib/Transforms')
| -rw-r--r-- | lib/Transforms/Scalar/MemCpyOptimizer.cpp | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/lib/Transforms/Scalar/MemCpyOptimizer.cpp b/lib/Transforms/Scalar/MemCpyOptimizer.cpp index 0d3c5c7..acddf08 100644 --- a/lib/Transforms/Scalar/MemCpyOptimizer.cpp +++ b/lib/Transforms/Scalar/MemCpyOptimizer.cpp @@ -690,8 +690,10 @@ bool MemCpyOpt::processMemCpyMemCpyDependence(MemCpyInst *M, MemCpyInst *MDep, // Second, the length of the memcpy's must be the same, or the preceeding one // must be larger than the following one. - ConstantInt *C1 = dyn_cast<ConstantInt>(MDep->getLength()); - if (!C1) return false; + ConstantInt *MDepLen = dyn_cast<ConstantInt>(MDep->getLength()); + ConstantInt *MLen = dyn_cast<ConstantInt>(M->getLength()); + if (!MDepLen || !MLen || MDepLen->getZExtValue() < MLen->getZExtValue()) + return false; AliasAnalysis &AA = getAnalysis<AliasAnalysis>(); |