diff options
| -rw-r--r-- | lib/Transforms/Scalar/InstructionCombining.cpp | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/lib/Transforms/Scalar/InstructionCombining.cpp b/lib/Transforms/Scalar/InstructionCombining.cpp index fcf3707..0bcd6f1 100644 --- a/lib/Transforms/Scalar/InstructionCombining.cpp +++ b/lib/Transforms/Scalar/InstructionCombining.cpp @@ -18,6 +18,7 @@ #include "llvm/ConstantHandling.h" #include "llvm/Function.h" #include "llvm/iMemory.h" +#include "llvm/iOther.h" #include "llvm/InstrTypes.h" #include "llvm/Pass.h" #include "llvm/Support/InstIterator.h" @@ -138,6 +139,13 @@ static bool CombineInstruction(Instruction *I) { Result = CombineBinOp(BOP); else if (MemAccessInst *MAI = dyn_cast<MemAccessInst>(I)) Result = CombineIndicies(MAI); + else if (CastInst *CI = dyn_cast<CastInst>(I)) { + if (CI->getType() == CI->getOperand(0)->getType() && !CI->use_empty()) { + CI->replaceAllUsesWith(CI->getOperand(0)); + return true; + } + + } if (!Result) return false; if (Result == I) return true; |