6024e5c395
clang 20.0.0 (based on r547379) from build 12806354. Bug: http://b/379133546 Test: N/A Change-Id: I2eb8938af55d809de674be63cb30cf27e801862b Upstream-Commit: ad834e67b1105d15ef907f6255d4c96e8e733f57
137 lines
4.3 KiB
C++
137 lines
4.3 KiB
C++
//===- NoFolder.h - Constant folding helper ---------------------*- C++ -*-===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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//
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// This file defines the NoFolder class, a helper for IRBuilder. It provides
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// IRBuilder with a set of methods for creating unfolded constants. This is
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// useful for learners trying to understand how LLVM IR works, and who don't
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// want details to be hidden by the constant folder. For general constant
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// creation and folding, use ConstantExpr and the routines in
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// llvm/Analysis/ConstantFolding.h.
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//
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// Note: since it is not actually possible to create unfolded constants, this
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// class returns instructions rather than constants.
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_IR_NOFOLDER_H
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#define LLVM_IR_NOFOLDER_H
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#include "llvm/ADT/ArrayRef.h"
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#include "llvm/IR/Constants.h"
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#include "llvm/IR/FMF.h"
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#include "llvm/IR/IRBuilderFolder.h"
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#include "llvm/IR/InstrTypes.h"
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#include "llvm/IR/Instruction.h"
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#include "llvm/IR/Instructions.h"
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namespace llvm {
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/// NoFolder - Create "constants" (actually, instructions) with no folding.
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class NoFolder final : public IRBuilderFolder {
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virtual void anchor();
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public:
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explicit NoFolder() = default;
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//===--------------------------------------------------------------------===//
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// Value-based folders.
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//
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// Return an existing value or a constant if the operation can be simplified.
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// Otherwise return nullptr.
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//===--------------------------------------------------------------------===//
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Value *FoldBinOp(Instruction::BinaryOps Opc, Value *LHS,
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Value *RHS) const override {
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return nullptr;
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}
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Value *FoldExactBinOp(Instruction::BinaryOps Opc, Value *LHS, Value *RHS,
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bool IsExact) const override {
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return nullptr;
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}
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Value *FoldNoWrapBinOp(Instruction::BinaryOps Opc, Value *LHS, Value *RHS,
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bool HasNUW, bool HasNSW) const override {
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return nullptr;
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}
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Value *FoldBinOpFMF(Instruction::BinaryOps Opc, Value *LHS, Value *RHS,
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FastMathFlags FMF) const override {
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return nullptr;
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}
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Value *FoldUnOpFMF(Instruction::UnaryOps Opc, Value *V,
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FastMathFlags FMF) const override {
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return nullptr;
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}
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Value *FoldCmp(CmpInst::Predicate P, Value *LHS, Value *RHS) const override {
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return nullptr;
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}
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Value *FoldGEP(Type *Ty, Value *Ptr, ArrayRef<Value *> IdxList,
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GEPNoWrapFlags NW) const override {
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return nullptr;
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}
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Value *FoldSelect(Value *C, Value *True, Value *False) const override {
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return nullptr;
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}
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Value *FoldExtractValue(Value *Agg,
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ArrayRef<unsigned> IdxList) const override {
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return nullptr;
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}
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Value *FoldInsertValue(Value *Agg, Value *Val,
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ArrayRef<unsigned> IdxList) const override {
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return nullptr;
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}
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Value *FoldExtractElement(Value *Vec, Value *Idx) const override {
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return nullptr;
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}
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Value *FoldInsertElement(Value *Vec, Value *NewElt,
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Value *Idx) const override {
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return nullptr;
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}
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Value *FoldShuffleVector(Value *V1, Value *V2,
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ArrayRef<int> Mask) const override {
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return nullptr;
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}
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Value *FoldCast(Instruction::CastOps Op, Value *V,
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Type *DestTy) const override {
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return nullptr;
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}
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Value *FoldBinaryIntrinsic(Intrinsic::ID ID, Value *LHS, Value *RHS, Type *Ty,
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Instruction *FMFSource) const override {
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return nullptr;
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}
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//===--------------------------------------------------------------------===//
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// Cast/Conversion Operators
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//===--------------------------------------------------------------------===//
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Instruction *CreatePointerCast(Constant *C, Type *DestTy) const override {
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return CastInst::CreatePointerCast(C, DestTy);
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}
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Instruction *CreatePointerBitCastOrAddrSpaceCast(
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Constant *C, Type *DestTy) const override {
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return CastInst::CreatePointerBitCastOrAddrSpaceCast(C, DestTy);
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}
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};
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} // end namespace llvm
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#endif // LLVM_IR_NOFOLDER_H
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