diff options
Diffstat (limited to 'include/llvm/Analysis/ConstantFolding.h')
| -rw-r--r-- | include/llvm/Analysis/ConstantFolding.h | 18 |
1 files changed, 13 insertions, 5 deletions
diff --git a/include/llvm/Analysis/ConstantFolding.h b/include/llvm/Analysis/ConstantFolding.h index 5fdf6d2..9805c6c 100644 --- a/include/llvm/Analysis/ConstantFolding.h +++ b/include/llvm/Analysis/ConstantFolding.h @@ -1,4 +1,4 @@ -//===-- ConstantFolding.h - Analyze constant folding possibilities --------===// +//===-- ConstantFolding.h - Fold instructions into constants --------------===// // // The LLVM Compiler Infrastructure // @@ -7,8 +7,12 @@ // //===----------------------------------------------------------------------===// // -// This family of functions determines the possibility of performing constant -// folding. +// This file declares routines for folding instructions into constants. +// +// Also, to supplement the basic VMCore ConstantExpr simplifications, +// this file declares some additional folding routines that can make use of +// TargetData information. These functions cannot go in VMCore due to library +// dependency issues. // //===----------------------------------------------------------------------===// @@ -22,18 +26,20 @@ namespace llvm { class TargetData; class Function; class Type; + class LLVMContext; /// ConstantFoldInstruction - Attempt to constant fold the specified /// instruction. If successful, the constant result is returned, if not, null /// is returned. Note that this function can only fail when attempting to fold /// instructions like loads and stores, which have no constant expression form. /// -Constant *ConstantFoldInstruction(Instruction *I, const TargetData *TD = 0); +Constant *ConstantFoldInstruction(Instruction *I, LLVMContext &Context, + const TargetData *TD = 0); /// ConstantFoldConstantExpression - Attempt to fold the constant expression /// using the specified TargetData. If successful, the constant result is /// result is returned, if not, null is returned. -Constant *ConstantFoldConstantExpression(ConstantExpr *CE, +Constant *ConstantFoldConstantExpression(ConstantExpr *CE, LLVMContext &Context, const TargetData *TD = 0); /// ConstantFoldInstOperands - Attempt to constant fold an instruction with the @@ -44,6 +50,7 @@ Constant *ConstantFoldConstantExpression(ConstantExpr *CE, /// Constant *ConstantFoldInstOperands(unsigned Opcode, const Type *DestTy, Constant*const * Ops, unsigned NumOps, + LLVMContext &Context, const TargetData *TD = 0); /// ConstantFoldCompareInstOperands - Attempt to constant fold a compare @@ -52,6 +59,7 @@ Constant *ConstantFoldInstOperands(unsigned Opcode, const Type *DestTy, /// Constant *ConstantFoldCompareInstOperands(unsigned Predicate, Constant*const * Ops, unsigned NumOps, + LLVMContext &Context, const TargetData *TD = 0); |
