diff options
Diffstat (limited to 'llvm/lib/Transforms/Scalar/SCCP.cpp')
| -rw-r--r-- | llvm/lib/Transforms/Scalar/SCCP.cpp | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/llvm/lib/Transforms/Scalar/SCCP.cpp b/llvm/lib/Transforms/Scalar/SCCP.cpp index 2fca803adde..c5e2e9f3f79 100644 --- a/llvm/lib/Transforms/Scalar/SCCP.cpp +++ b/llvm/lib/Transforms/Scalar/SCCP.cpp @@ -1047,7 +1047,7 @@ void SCCPSolver::visitStoreInst(StoreInst &SI) { // global, we can replace the load with the loaded constant value! void SCCPSolver::visitLoadInst(LoadInst &I) { // If this load is of a struct, just mark the result overdefined. - if (I.getType()->isStructTy()) + if (I.getType()->isStructTy() || I.getType()->isMMXTy()) return markAnythingOverdefined(&I); LatticeVal PtrVal = getValueState(I.getOperand(0)); @@ -1061,9 +1061,9 @@ void SCCPSolver::visitLoadInst(LoadInst &I) { Constant *Ptr = PtrVal.getConstant(); - // load null -> null + // load null is undefined. if (isa<ConstantPointerNull>(Ptr) && I.getPointerAddressSpace() == 0) - return markConstant(IV, &I, UndefValue::get(I.getType())); + return; // Transform load (constant global) into the value loaded. if (GlobalVariable *GV = dyn_cast<GlobalVariable>(Ptr)) { |
