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Support targets that require stubs for external functions better

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@18098 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner
2004-11-22 07:24:43 +00:00
parent 93ee7dc430
commit b43dbdcb20
1 changed files with 18 additions and 2 deletions
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18
lib/ExecutionEngine/JIT/JITEmitter.cpp
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@@ -151,9 +151,22 @@ void *JITResolver::getFunctionStub(Function *F) {
void *&Stub = FunctionToStubMap[F]; void *&Stub = FunctionToStubMap[F];
if (Stub) return Stub; if (Stub) return Stub;
// Call the lazy resolver function unless we already KNOW it is an external
// function, in which case we just skip the lazy resolution step.
void *Actual = (void*)LazyResolverFn;
if (F->hasExternalLinkage())
Actual = TheJIT->getPointerToFunction(F);
// Otherwise, codegen a new stub. For now, the stub will call the lazy // Otherwise, codegen a new stub. For now, the stub will call the lazy
// resolver function. // resolver function.
Stub = TheJIT->getJITInfo().emitFunctionStub((void*)LazyResolverFn, MCE); Stub = TheJIT->getJITInfo().emitFunctionStub(Actual, MCE);
if (F->hasExternalLinkage()) {
// If we are getting the stub for an external function, we really want the
// address of the stub in the GlobalAddressMap for the JIT, not the address
// of the external function.
TheJIT->updateGlobalMapping(F, Stub);
}
DEBUG(std::cerr << "JIT: Stub emitted at [" << Stub << "] for function '" DEBUG(std::cerr << "JIT: Stub emitted at [" << Stub << "] for function '"
<< F->getName() << "\n"); << F->getName() << "\n");
@@ -274,7 +287,10 @@ void *Emitter::getPointerToGlobal(GlobalValue *V, void *Reference,
if (F->hasExternalLinkage()) { if (F->hasExternalLinkage()) {
// If this is an external function pointer, we can force the JIT to // If this is an external function pointer, we can force the JIT to
// 'compile' it, which really just adds it to the map. // 'compile' it, which really just adds it to the map.
if (DoesntNeedStub)
return TheJIT->getPointerToFunction(F); return TheJIT->getPointerToFunction(F);
return getJITResolver(this).getFunctionStub(F);
} }
// Okay, the function has not been compiled yet, if the target callback // Okay, the function has not been compiled yet, if the target callback