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Diffstat (limited to 'include/llvm/Target/TargetJITInfo.h')
| -rw-r--r-- | include/llvm/Target/TargetJITInfo.h | 137 |
1 files changed, 0 insertions, 137 deletions
diff --git a/include/llvm/Target/TargetJITInfo.h b/include/llvm/Target/TargetJITInfo.h deleted file mode 100644 index f9bd0fb..0000000 --- a/include/llvm/Target/TargetJITInfo.h +++ /dev/null @@ -1,137 +0,0 @@ -//===- Target/TargetJITInfo.h - Target Information for JIT ------*- C++ -*-===// -// -// The LLVM Compiler Infrastructure -// -// This file is distributed under the University of Illinois Open Source -// License. See LICENSE.TXT for details. -// -//===----------------------------------------------------------------------===// -// -// This file exposes an abstract interface used by the Just-In-Time code -// generator to perform target-specific activities, such as emitting stubs. If -// a TargetMachine supports JIT code generation, it should provide one of these -// objects through the getJITInfo() method. -// -//===----------------------------------------------------------------------===// - -#ifndef LLVM_TARGET_TARGETJITINFO_H -#define LLVM_TARGET_TARGETJITINFO_H - -#include "llvm/Support/DataTypes.h" -#include "llvm/Support/ErrorHandling.h" -#include <cassert> - -namespace llvm { - class Function; - class GlobalValue; - class JITCodeEmitter; - class MachineRelocation; - - /// TargetJITInfo - Target specific information required by the Just-In-Time - /// code generator. - class TargetJITInfo { - virtual void anchor(); - public: - virtual ~TargetJITInfo() {} - - /// replaceMachineCodeForFunction - Make it so that calling the function - /// whose machine code is at OLD turns into a call to NEW, perhaps by - /// overwriting OLD with a branch to NEW. This is used for self-modifying - /// code. - /// - virtual void replaceMachineCodeForFunction(void *Old, void *New) = 0; - - /// emitGlobalValueIndirectSym - Use the specified JITCodeEmitter object - /// to emit an indirect symbol which contains the address of the specified - /// ptr. - virtual void *emitGlobalValueIndirectSym(const GlobalValue* GV, void *ptr, - JITCodeEmitter &JCE) { - llvm_unreachable("This target doesn't implement " - "emitGlobalValueIndirectSym!"); - } - - /// Records the required size and alignment for a call stub in bytes. - struct StubLayout { - size_t Size; - size_t Alignment; - }; - /// Returns the maximum size and alignment for a call stub on this target. - virtual StubLayout getStubLayout() { - llvm_unreachable("This target doesn't implement getStubLayout!"); - } - - /// emitFunctionStub - Use the specified JITCodeEmitter object to emit a - /// small native function that simply calls the function at the specified - /// address. The JITCodeEmitter must already have storage allocated for the - /// stub. Return the address of the resultant function, which may have been - /// aligned from the address the JCE was set up to emit at. - virtual void *emitFunctionStub(const Function* F, void *Target, - JITCodeEmitter &JCE) { - llvm_unreachable("This target doesn't implement emitFunctionStub!"); - } - - /// getPICJumpTableEntry - Returns the value of the jumptable entry for the - /// specific basic block. - virtual uintptr_t getPICJumpTableEntry(uintptr_t BB, uintptr_t JTBase) { - llvm_unreachable("This target doesn't implement getPICJumpTableEntry!"); - } - - /// LazyResolverFn - This typedef is used to represent the function that - /// unresolved call points should invoke. This is a target specific - /// function that knows how to walk the stack and find out which stub the - /// call is coming from. - typedef void (*LazyResolverFn)(); - - /// JITCompilerFn - This typedef is used to represent the JIT function that - /// lazily compiles the function corresponding to a stub. The JIT keeps - /// track of the mapping between stubs and LLVM Functions, the target - /// provides the ability to figure out the address of a stub that is called - /// by the LazyResolverFn. - typedef void* (*JITCompilerFn)(void *); - - /// getLazyResolverFunction - This method is used to initialize the JIT, - /// giving the target the function that should be used to compile a - /// function, and giving the JIT the target function used to do the lazy - /// resolving. - virtual LazyResolverFn getLazyResolverFunction(JITCompilerFn) { - llvm_unreachable("Not implemented for this target!"); - } - - /// relocate - Before the JIT can run a block of code that has been emitted, - /// it must rewrite the code to contain the actual addresses of any - /// referenced global symbols. - virtual void relocate(void *Function, MachineRelocation *MR, - unsigned NumRelocs, unsigned char* GOTBase) { - assert(NumRelocs == 0 && "This target does not have relocations!"); - } - - - /// allocateThreadLocalMemory - Each target has its own way of - /// handling thread local variables. This method returns a value only - /// meaningful to the target. - virtual char* allocateThreadLocalMemory(size_t size) { - llvm_unreachable("This target does not implement thread local storage!"); - } - - /// needsGOT - Allows a target to specify that it would like the - /// JIT to manage a GOT for it. - bool needsGOT() const { return useGOT; } - - /// hasCustomConstantPool - Allows a target to specify that constant - /// pool address resolution is handled by the target. - virtual bool hasCustomConstantPool() const { return false; } - - /// hasCustomJumpTables - Allows a target to specify that jumptables - /// are emitted by the target. - virtual bool hasCustomJumpTables() const { return false; } - - /// allocateSeparateGVMemory - If true, globals should be placed in - /// separately allocated heap memory rather than in the same - /// code memory allocated by JITCodeEmitter. - virtual bool allocateSeparateGVMemory() const { return false; } - protected: - bool useGOT; - }; -} // End llvm namespace - -#endif |