From 9f3c25aeb3df77a336693308dc0f19a4983c99af Mon Sep 17 00:00:00 2001 From: Chris Lattner Date: Mon, 9 Nov 2009 22:57:59 +0000 Subject: stub out a new libanalysis "instruction simplify" interface that takes decimated instructions and applies identities to them. This is pretty minimal at this point, but I plan to pull some instcombine logic out into these and similar routines. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@86613 91177308-0d34-0410-b5e6-96231b3b80d8 --- include/llvm/Analysis/InstructionSimplify.h | 37 +++++++++++++++++++++++++++++ 1 file changed, 37 insertions(+) create mode 100644 include/llvm/Analysis/InstructionSimplify.h (limited to 'include/llvm/Analysis/InstructionSimplify.h') diff --git a/include/llvm/Analysis/InstructionSimplify.h b/include/llvm/Analysis/InstructionSimplify.h new file mode 100644 index 0000000000..7d75435575 --- /dev/null +++ b/include/llvm/Analysis/InstructionSimplify.h @@ -0,0 +1,37 @@ +//===-- InstructionSimplify.h - Fold instructions into simpler forms ------===// +// +// The LLVM Compiler Infrastructure +// +// This file is distributed under the University of Illinois Open Source +// License. See LICENSE.TXT for details. +// +//===----------------------------------------------------------------------===// +// +// This file declares routines for folding instructions into simpler forms that +// do not require creating new instructions. For example, this does constant +// folding, and can handle identities like (X&0)->0. +// +//===----------------------------------------------------------------------===// + +#ifndef LLVM_ANALYSIS_INSTRUCTIONSIMPLIFY_H +#define LLVM_ANALYSIS_INSTRUCTIONSIMPLIFY_H + +namespace llvm { + class Value; + class TargetData; + + /// SimplifyCompare - Given operands for a CmpInst, see if we can + /// fold the result. If not, this returns null. + Value *SimplifyCompare(unsigned Predicate, Value *LHS, Value *RHS, + const TargetData *TD = 0); + + + /// SimplifyBinOp - Given operands for a BinaryOperator, see if we can + /// fold the result. If not, this returns null. + Value *SimplifyBinOp(unsigned Opcode, Value *LHS, Value *RHS, + const TargetData *TD = 0); + +} // end namespace llvm + +#endif + -- cgit v1.2.3