diff options
| -rw-r--r-- | lib/Transforms/Scalar/SCCP.cpp | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/lib/Transforms/Scalar/SCCP.cpp b/lib/Transforms/Scalar/SCCP.cpp index 79d90e6532..63ce512508 100644 --- a/lib/Transforms/Scalar/SCCP.cpp +++ b/lib/Transforms/Scalar/SCCP.cpp @@ -23,6 +23,7 @@ #include "llvm/ConstantPool.h" #include "llvm/InstrTypes.h" #include "llvm/iOther.h" +#include "llvm/iMemory.h" #include "llvm/iTerminators.h" #include "llvm/Tools/STLExtras.h" #include "llvm/Assembly/Writer.h" @@ -429,8 +430,13 @@ void SCCP::UpdateInstruction(Instruction *I) { //===-------------------------------------------------------------------===// // Handle Unary instructions... + // Also treated as unary here, are cast instructions and getelementptr + // instructions on struct* operands. // - if (I->isUnaryOp() || I->getOpcode() == Instruction::Cast) { + if (I->isUnaryOp() || I->getOpcode() == Instruction::Cast || + (I->getOpcode() == Instruction::GetElementPtr && + ((GetElementPtrInst*)I)->isStructSelector())) { + Value *V = I->getOperand(0); InstVal &VState = getValueState(V); if (VState.isOverdefined()) { // Inherit overdefinedness of operand |