1 //===- X86JITInfo.h - X86 implementation of the JIT interface --*- C++ -*-===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // This file contains the X86 implementation of the TargetJITInfo class.
12 //===----------------------------------------------------------------------===//
17 #include "llvm/Function.h"
18 #include "llvm/Target/TargetJITInfo.h"
21 class X86TargetMachine;
23 class X86JITInfo : public TargetJITInfo {
28 explicit X86JITInfo(X86TargetMachine &tm) : TM(tm) {
33 /// replaceMachineCodeForFunction - Make it so that calling the function
34 /// whose machine code is at OLD turns into a call to NEW, perhaps by
35 /// overwriting OLD with a branch to NEW. This is used for self-modifying
38 virtual void replaceMachineCodeForFunction(void *Old, void *New);
40 /// emitGlobalValueLazyPtr - Use the specified MachineCodeEmitter object to
41 /// emit a lazy pointer which contains the address of the specified ptr.
42 virtual void *emitGlobalValueLazyPtr(const GlobalValue* GV, void *ptr,
43 MachineCodeEmitter &MCE);
45 /// emitFunctionStub - Use the specified MachineCodeEmitter object to emit a
46 /// small native function that simply calls the function at the specified
48 virtual void *emitFunctionStub(const Function* F, void *Fn,
49 MachineCodeEmitter &MCE);
51 /// getPICJumpTableEntry - Returns the value of the jumptable entry for the
52 /// specific basic block.
53 virtual intptr_t getPICJumpTableEntry(intptr_t BB, intptr_t JTBase);
55 /// getLazyResolverFunction - Expose the lazy resolver to the JIT.
56 virtual LazyResolverFn getLazyResolverFunction(JITCompilerFn);
58 /// relocate - Before the JIT can run a block of code that has been emitted,
59 /// it must rewrite the code to contain the actual addresses of any
60 /// referenced global symbols.
61 virtual void relocate(void *Function, MachineRelocation *MR,
62 unsigned NumRelocs, unsigned char* GOTBase);
64 /// allocateThreadLocalMemory - Each target has its own way of
65 /// handling thread local variables. This method returns a value only
66 /// meaningful to the target.
67 virtual char* allocateThreadLocalMemory(size_t size);
69 /// setPICBase / getPICBase - Getter / setter of PICBase, used to compute
70 /// PIC jumptable entry.
71 void setPICBase(intptr_t Base) { PICBase = Base; }
72 intptr_t getPICBase() const { return PICBase; }