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 //===----------------------------------------------------------------------===//
14 #ifndef LLVM_LIB_TARGET_X86_X86JITINFO_H
15 #define LLVM_LIB_TARGET_X86_X86JITINFO_H
17 #include "llvm/CodeGen/JITCodeEmitter.h"
18 #include "llvm/IR/Function.h"
19 #include "llvm/Target/TargetJITInfo.h"
24 class X86JITInfo : public TargetJITInfo {
29 explicit X86JITInfo(bool UseSSE);
31 /// replaceMachineCodeForFunction - Make it so that calling the function
32 /// whose machine code is at OLD turns into a call to NEW, perhaps by
33 /// overwriting OLD with a branch to NEW. This is used for self-modifying
36 void replaceMachineCodeForFunction(void *Old, void *New) override;
38 /// emitGlobalValueIndirectSym - Use the specified JITCodeEmitter object
39 /// to emit an indirect symbol which contains the address of the specified
41 void *emitGlobalValueIndirectSym(const GlobalValue* GV, void *ptr,
42 JITCodeEmitter &JCE) override;
44 // getStubLayout - Returns the size and alignment of the largest call stub
46 StubLayout getStubLayout() override;
48 /// emitFunctionStub - Use the specified JITCodeEmitter object to emit a
49 /// small native function that simply calls the function at the specified
51 void *emitFunctionStub(const Function* F, void *Target,
52 JITCodeEmitter &JCE) override;
54 /// getPICJumpTableEntry - Returns the value of the jumptable entry for the
55 /// specific basic block.
56 uintptr_t getPICJumpTableEntry(uintptr_t BB, uintptr_t JTBase) override;
58 /// getLazyResolverFunction - Expose the lazy resolver to the JIT.
59 LazyResolverFn getLazyResolverFunction(JITCompilerFn) override;
61 /// relocate - Before the JIT can run a block of code that has been emitted,
62 /// it must rewrite the code to contain the actual addresses of any
63 /// referenced global symbols.
64 void relocate(void *Function, MachineRelocation *MR,
65 unsigned NumRelocs, unsigned char* GOTBase) override;
67 /// allocateThreadLocalMemory - Each target has its own way of
68 /// handling thread local variables. This method returns a value only
69 /// meaningful to the target.
70 char* allocateThreadLocalMemory(size_t size) override;
72 /// setPICBase / getPICBase - Getter / setter of PICBase, used to compute
73 /// PIC jumptable entry.
74 void setPICBase(uintptr_t Base) { PICBase = Base; }
75 uintptr_t getPICBase() const { return PICBase; }