+ 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!");
+ }