diff options
| author | Dan Gohman <gohman@apple.com> | 2009-08-19 00:11:12 +0000 |
|---|---|---|
| committer | Dan Gohman <gohman@apple.com> | 2009-08-19 00:11:12 +0000 |
| commit | 107f41fad5f8df734c72cf39a016a7ea0d874388 (patch) | |
| tree | 4eb7a844e364bb61f523a4d8cdf78930a3f047c4 /lib/Transforms | |
| parent | 2c9489d6e96d99f77b6c31919805b5e61954deb2 (diff) | |
| download | external_llvm-107f41fad5f8df734c72cf39a016a7ea0d874388.zip external_llvm-107f41fad5f8df734c72cf39a016a7ea0d874388.tar.gz external_llvm-107f41fad5f8df734c72cf39a016a7ea0d874388.tar.bz2 | |
Fix SimplifyLibcalls and ValueTracking to check mayBeOverridden
before performing optimizations based on constant string values.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@79384 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/Transforms')
| -rw-r--r-- | lib/Transforms/Scalar/SimplifyLibCalls.cpp | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/lib/Transforms/Scalar/SimplifyLibCalls.cpp b/lib/Transforms/Scalar/SimplifyLibCalls.cpp index 02b26bd..761c309 100644 --- a/lib/Transforms/Scalar/SimplifyLibCalls.cpp +++ b/lib/Transforms/Scalar/SimplifyLibCalls.cpp @@ -438,7 +438,8 @@ static uint64_t GetStringLengthH(Value *V, SmallPtrSet<PHINode*, 32> &PHIs) { // variable that is a constant and is initialized. The referenced constant // initializer is the array that we'll use for optimization. GlobalVariable* GV = dyn_cast<GlobalVariable>(GEP->getOperand(0)); - if (!GV || !GV->isConstant() || !GV->hasInitializer()) + if (!GV || !GV->isConstant() || !GV->hasInitializer() || + GV->mayBeOverridden()) return 0; Constant *GlobalInit = GV->getInitializer(); |