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1e60a9165d
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10542 91177308-0d34-0410-b5e6-96231b3b80d8
55 lines
2.1 KiB
C++
55 lines
2.1 KiB
C++
//===- Target/TargetJITInfo.h - Target Information for JIT ------*- C++ -*-===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file was developed by the LLVM research group and is distributed under
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// the University of Illinois Open Source License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This file exposes an abstract interface used by the Just-In-Time code
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// generator to perform target-specific activities, such as emitting stubs. If
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// a TargetMachine supports JIT code generation, it should provide one of these
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// objects through the getJITInfo() method.
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_TARGET_TARGETJITINFO_H
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#define LLVM_TARGET_TARGETJITINFO_H
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namespace llvm {
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class Function;
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class FunctionPassManager;
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class MachineCodeEmitter;
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/// TargetJITInfo - Target specific information required by the Just-In-Time
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/// code generator.
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struct TargetJITInfo {
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virtual ~TargetJITInfo() {}
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/// addPassesToJITCompile - Add passes to the specified pass manager to
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/// implement a fast code generator for this target.
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///
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virtual void addPassesToJITCompile(FunctionPassManager &PM) = 0;
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/// replaceMachineCodeForFunction - Make it so that calling the function
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/// whose machine code is at OLD turns into a call to NEW, perhaps by
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/// overwriting OLD with a branch to NEW. This is used for self-modifying
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/// code.
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///
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virtual void replaceMachineCodeForFunction (void *Old, void *New) = 0;
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/// getJITStubForFunction - Create or return a stub for the specified
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/// function. This stub acts just like the specified function, except that
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/// it allows the "address" of the function to be taken without having to
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/// generate code for it. Targets do not need to implement this method, but
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/// doing so will allow for faster startup of the JIT.
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///
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virtual void *getJITStubForFunction(Function *F, MachineCodeEmitter &MCE) {
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return 0;
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}
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};
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} // End llvm namespace
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#endif
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