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59 lines
2.1 KiB
59 lines
2.1 KiB
//===-- IntrinsicLowering.h - Intrinsic Function Lowering -------*- C++ -*-===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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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& TD;
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bool Warned;
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public:
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explicit IntrinsicLowering(const DataLayout &td) :
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TD(td), Warned(false) {}
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/// AddPrototypes - This method, if called, causes all of the prototypes
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/// that might be needed by an intrinsic lowering implementation to be
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/// inserted into the module specified.
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void AddPrototypes(Module &M);
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/// LowerIntrinsicCall - This method replaces a call with the LLVM function
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/// which should be used to implement the specified intrinsic function call.
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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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///
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void LowerIntrinsicCall(CallInst *CI);
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/// LowerToByteSwap - Replace a call instruction into a call to bswap
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/// intrinsic. Return false if it has determined the call is not a
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/// 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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