diff options
| -rw-r--r-- | llvm/include/llvm/Transforms/Scalar/InstructionCombining.h | 27 |
1 files changed, 27 insertions, 0 deletions
diff --git a/llvm/include/llvm/Transforms/Scalar/InstructionCombining.h b/llvm/include/llvm/Transforms/Scalar/InstructionCombining.h new file mode 100644 index 00000000000..09762d15526 --- /dev/null +++ b/llvm/include/llvm/Transforms/Scalar/InstructionCombining.h @@ -0,0 +1,27 @@ +//===- llvm/Transforms/Scalar/InstructionCombining.h -------------*- C++ -*--=// +// +// InstructionCombining - Combine instructions to form fewer, simple +// instructions. This pass does not modify the CFG, and has a tendancy to +// make instructions dead, so a subsequent DCE pass is useful. +// +// This pass combines things like: +// %Y = add int 1, %X +// %Z = add int 1, %Y +// into: +// %Z = add int 2, %X +// +//===----------------------------------------------------------------------===// + +#ifndef LLVM_TRANSFORMS_SCALAR_INSTRUCTIONCOMBINING_H +#define LLVM_TRANSFORMS_SCALAR_INSTRUCTIONCOMBINING_H + +#include "llvm/Pass.h" + +struct InstructionCombining : public Pass { + static bool doit(Method *M); + static bool CombineInstruction(Instruction *I); + + virtual bool doPerMethodWork(Method *M) { return doit(M); } +}; + +#endif |
