diff options
Diffstat (limited to 'lib/Transforms/Scalar/InstructionCombining.cpp')
| -rw-r--r-- | lib/Transforms/Scalar/InstructionCombining.cpp | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/lib/Transforms/Scalar/InstructionCombining.cpp b/lib/Transforms/Scalar/InstructionCombining.cpp index 07eb252..3a7d101 100644 --- a/lib/Transforms/Scalar/InstructionCombining.cpp +++ b/lib/Transforms/Scalar/InstructionCombining.cpp @@ -8939,8 +8939,9 @@ static bool isSafeToLoadUnconditionally(Value *V, Instruction *ScanFrom) { // If it is an alloca it is always safe to load from. if (isa<AllocaInst>(V)) return true; - // Don't try to evaluate aliases. External weak GV can be null. + // If it is a global variable it is mostly safe to load from. if (const GlobalValue *GV = dyn_cast<GlobalVariable>(V)) + // Don't try to evaluate aliases. External weak GV can be null. return !isa<GlobalAlias>(GV) && !GV->hasExternalWeakLinkage(); // Otherwise, be a little bit agressive by scanning the local block where we |