+++ /dev/null
-//===-- llvm/IntrinsicLowering.h - Intrinsic Function Lowering --*- C++ -*-===//
-//
-// The LLVM Compiler Infrastructure
-//
-// This file was developed by the LLVM research group and is distributed under
-// the University of Illinois Open Source License. See LICENSE.TXT for details.
-//
-//===----------------------------------------------------------------------===//
-//
-// This file defines the IntrinsicLowering interface. This interface allows
-// addition of domain-specific or front-end specific intrinsics to LLVM without
-// having to modify all of the target-machines to support the new intrinsic.
-// Later, as desired, code generators can incrementally add support for
-// particular intrinsic functions, as desired, to generate better code.
-//
-// If a code generator cannot handle or does not know about an intrinsic
-// function, it will use the intrinsic lowering interface to change an intrinsic
-// function name into a concrete function name which can be used to implement
-// the functionality of the intrinsic. For example, llvm.acos can be
-// implemented as a call to the math library 'acos' function if the target
-// doesn't have hardware support for the intrinsic, or if it has not yet been
-// implemented yet.
-//
-// Another use for this interface is the addition of domain-specific intrinsics.
-// The default implementation of this interface would then lower the intrinsics
-// to noop calls, allowing the direct execution of programs with instrumentation
-// or other hooks placed in them. When a specific tool or flag is used, a
-// different implementation of these interfaces may be used, which activates the
-// intrinsics in some way.
-//
-//===----------------------------------------------------------------------===//
-
-#ifndef LLVM_INTRINSICLOWERING_H
-#define LLVM_INTRINSICLOWERING_H
-
-#include "llvm/Intrinsics.h"
-
-namespace llvm {
- class CallInst;
- class Module;
-
- struct IntrinsicLowering {
- virtual ~IntrinsicLowering() {}
-
- /// AddPrototypes - This method, if called, causes all of the prototypes
- /// that might be needed by an intrinsic lowering implementation to be
- /// inserted into the module specified.
- virtual void AddPrototypes(Module &M) = 0;
-
- /// LowerIntrinsicCall - This method returns the LLVM function which should
- /// be used to implement the specified intrinsic function call. If an
- /// intrinsic function must be implemented by the code generator (such as
- /// va_start), this function should print a message and abort.
- ///
- /// Otherwise, if an intrinsic function call can be lowered, the code to
- /// implement it (often a call to a non-intrinsic function) is inserted
- /// _after_ the call instruction and the call is deleted. The caller must
- /// be capable of handling this kind of change.
- ///
- virtual void LowerIntrinsicCall(CallInst *CI) = 0;
- };
-
- /// DefaultIntrinsicLower - This is the default intrinsic lowering pass which
- /// is used if no other one is specified. Custom intrinsic lowering
- /// implementations should pass any unhandled intrinsics to this
- /// implementation to allow for future extensibility.
- struct DefaultIntrinsicLowering : public IntrinsicLowering {
- virtual void AddPrototypes(Module &M);
- virtual void LowerIntrinsicCall(CallInst *CI);
- };
-}
-
-#endif