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to reflect the new license. We understand that people may be surprised that we're moving the header entirely to discuss the new license. We checked this carefully with the Foundation's lawyer and we believe this is the correct approach. Essentially, all code in the project is now made available by the LLVM project under our new license, so you will see that the license headers include that license only. Some of our contributors have contributed code under our old license, and accordingly, we have retained a copy of our old license notice in the top-level files in each project and repository. llvm-svn: 351636
54 lines
1.9 KiB
C++
54 lines
1.9 KiB
C++
//===-- IntrinsicLowering.h - Intrinsic Function Lowering -------*- 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 IntrinsicLowering interface. This interface allows
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// addition of domain-specific or front-end specific intrinsics to LLVM without
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// having to modify all of the C backend or interpreter.
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_CODEGEN_INTRINSICLOWERING_H
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#define LLVM_CODEGEN_INTRINSICLOWERING_H
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#include "llvm/IR/Intrinsics.h"
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namespace llvm {
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class CallInst;
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class Module;
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class DataLayout;
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class IntrinsicLowering {
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const DataLayout &DL;
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bool Warned;
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public:
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explicit IntrinsicLowering(const DataLayout &DL) : DL(DL), Warned(false) {}
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/// Add all of the prototypes that might be needed by an intrinsic lowering
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/// implementation to be inserted into the module specified.
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void AddPrototypes(Module &M);
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/// Replace a call to the specified intrinsic function.
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/// If an intrinsic function must be implemented by the code generator
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/// (such as va_start), this function should print a message and abort.
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///
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/// Otherwise, if an intrinsic function call can be lowered, the code to
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/// implement it (often a call to a non-intrinsic function) is inserted
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/// _after_ the call instruction and the call is deleted. The caller must
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/// be capable of handling this kind of change.
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void LowerIntrinsicCall(CallInst *CI);
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/// Try to replace a call instruction with a call to a bswap intrinsic. Return
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/// false if the call is not a simple integer bswap.
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static bool LowerToByteSwap(CallInst *CI);
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};
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}
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#endif
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