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move more EH stuff to being lazily created. An empty .m file now 

produces just 14 dead "declares" in llvm ir instead of 19.

llvm-svn: 69763
This commit is contained in:
Chris Lattner 2009-04-22 02:26:14 +00:00
parent a7c00b4c4c
commit c6406dbf7f
1 changed files with 54 additions and 52 deletions
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102
clang/lib/CodeGen/CGObjCMac.cpp
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@ -194,19 +194,54 @@ public:
const llvm::Type *ExceptionDataTy;
/// ExceptionTryEnterFn - LLVM objc_exception_try_enter function.
llvm::Constant *ExceptionTryEnterFn;
llvm::Constant *getExceptionTryEnterFn() {
std::vector<const llvm::Type*> Params;
Params.push_back(llvm::PointerType::getUnqual(ExceptionDataTy));
return CGM.CreateRuntimeFunction(llvm::FunctionType::get(llvm::Type::VoidTy,
Params, false),
"objc_exception_try_enter");
}
/// ExceptionTryExitFn - LLVM objc_exception_try_exit function.
llvm::Constant *ExceptionTryExitFn;
llvm::Constant *getExceptionTryExitFn() {
std::vector<const llvm::Type*> Params;
Params.push_back(llvm::PointerType::getUnqual(ExceptionDataTy));
return CGM.CreateRuntimeFunction(llvm::FunctionType::get(llvm::Type::VoidTy,
Params, false),
"objc_exception_try_exit");
}
/// ExceptionExtractFn - LLVM objc_exception_extract function.
llvm::Constant *ExceptionExtractFn;
llvm::Constant *getExceptionExtractFn() {
std::vector<const llvm::Type*> Params;
Params.push_back(llvm::PointerType::getUnqual(ExceptionDataTy));
return CGM.CreateRuntimeFunction(llvm::FunctionType::get(ObjectPtrTy,
Params, false),
"objc_exception_extract");
}
/// ExceptionMatchFn - LLVM objc_exception_match function.
llvm::Constant *ExceptionMatchFn;
llvm::Constant *getExceptionMatchFn() {
std::vector<const llvm::Type*> Params;
Params.push_back(ClassPtrTy);
Params.push_back(ObjectPtrTy);
return CGM.CreateRuntimeFunction(llvm::FunctionType::get(llvm::Type::Int32Ty,
Params, false),
"objc_exception_match");
}
/// SetJmpFn - LLVM _setjmp function.
llvm::Constant *SetJmpFn;
llvm::Constant *getSetJmpFn() {
std::vector<const llvm::Type*> Params;
Params.push_back(llvm::PointerType::getUnqual(llvm::Type::Int32Ty));
return
CGM.CreateRuntimeFunction(llvm::FunctionType::get(llvm::Type::Int32Ty,
Params, false),
"_setjmp");
}
public:
ObjCTypesHelper(CodeGen::CodeGenModule &cgm);
@ -2081,11 +2116,11 @@ void CGObjCMac::EmitTryOrSynchronizedStmt(CodeGen::CodeGenFunction &CGF,
CGF.Builder.CreateStore(llvm::ConstantInt::getTrue(), CallTryExitPtr);
// Enter a new try block and call setjmp.
CGF.Builder.CreateCall(ObjCTypes.ExceptionTryEnterFn, ExceptionData);
CGF.Builder.CreateCall(ObjCTypes.getExceptionTryEnterFn(), ExceptionData);
llvm::Value *JmpBufPtr = CGF.Builder.CreateStructGEP(ExceptionData, 0,
"jmpbufarray");
JmpBufPtr = CGF.Builder.CreateStructGEP(JmpBufPtr, 0, "tmp");
llvm::Value *SetJmpResult = CGF.Builder.CreateCall(ObjCTypes.SetJmpFn,
llvm::Value *SetJmpResult = CGF.Builder.CreateCall(ObjCTypes.getSetJmpFn(),
JmpBufPtr, "result");
llvm::BasicBlock *TryBlock = CGF.createBasicBlock("try");
@ -2104,9 +2139,9 @@ void CGObjCMac::EmitTryOrSynchronizedStmt(CodeGen::CodeGenFunction &CGF,
// Retrieve the exception object. We may emit multiple blocks but
// nothing can cross this so the value is already in SSA form.
llvm::Value *Caught = CGF.Builder.CreateCall(ObjCTypes.ExceptionExtractFn,
ExceptionData,
"caught");
llvm::Value *Caught =
CGF.Builder.CreateCall(ObjCTypes.getExceptionExtractFn(),
ExceptionData, "caught");
CGF.ObjCEHValueStack.back() = Caught;
if (!isTry)
{
@ -2119,9 +2154,9 @@ void CGObjCMac::EmitTryOrSynchronizedStmt(CodeGen::CodeGenFunction &CGF,
{
// Enter a new exception try block (in case a @catch block throws
// an exception).
CGF.Builder.CreateCall(ObjCTypes.ExceptionTryEnterFn, ExceptionData);
CGF.Builder.CreateCall(ObjCTypes.getExceptionTryEnterFn(), ExceptionData);
llvm::Value *SetJmpResult = CGF.Builder.CreateCall(ObjCTypes.SetJmpFn,
llvm::Value *SetJmpResult = CGF.Builder.CreateCall(ObjCTypes.getSetJmpFn(),
JmpBufPtr, "result");
llvm::Value *Threw = CGF.Builder.CreateIsNotNull(SetJmpResult, "threw");
@ -2175,7 +2210,8 @@ void CGObjCMac::EmitTryOrSynchronizedStmt(CodeGen::CodeGenFunction &CGF,
// Check if the @catch block matches the exception object.
llvm::Value *Class = EmitClassRef(CGF.Builder, ObjCType->getDecl());
llvm::Value *Match = CGF.Builder.CreateCall2(ObjCTypes.ExceptionMatchFn,
llvm::Value *Match =
CGF.Builder.CreateCall2(ObjCTypes.getExceptionMatchFn(),
Class, Caught, "match");
llvm::BasicBlock *MatchedBlock = CGF.createBasicBlock("matched");
@ -2208,7 +2244,8 @@ void CGObjCMac::EmitTryOrSynchronizedStmt(CodeGen::CodeGenFunction &CGF,
// Emit the exception handler for the @catch blocks.
CGF.EmitBlock(CatchHandler);
CGF.Builder.CreateStore(CGF.Builder.CreateCall(ObjCTypes.ExceptionExtractFn,
CGF.Builder.CreateStore(
CGF.Builder.CreateCall(ObjCTypes.getExceptionExtractFn(),
ExceptionData),
RethrowPtr);
CGF.Builder.CreateStore(llvm::ConstantInt::getFalse(), CallTryExitPtr);
@ -2233,7 +2270,7 @@ void CGObjCMac::EmitTryOrSynchronizedStmt(CodeGen::CodeGenFunction &CGF,
CGF.Builder.CreateCondBr(CallTryExit, FinallyExit, FinallyNoExit);
CGF.EmitBlock(FinallyExit);
CGF.Builder.CreateCall(ObjCTypes.ExceptionTryExitFn, ExceptionData);
CGF.Builder.CreateCall(ObjCTypes.getExceptionTryExitFn(), ExceptionData);
CGF.EmitBlock(FinallyNoExit);
if (isTry) {
@ -3626,41 +3663,6 @@ ObjCTypesHelper::ObjCTypesHelper(CodeGen::CodeGenModule &cgm)
CGM.getModule().addTypeName("struct._objc_exception_data",
ExceptionDataTy);
Params.clear();
Params.push_back(llvm::PointerType::getUnqual(ExceptionDataTy));
ExceptionTryEnterFn =
CGM.CreateRuntimeFunction(llvm::FunctionType::get(llvm::Type::VoidTy,
Params,
false),
"objc_exception_try_enter");
ExceptionTryExitFn =
CGM.CreateRuntimeFunction(llvm::FunctionType::get(llvm::Type::VoidTy,
Params,
false),
"objc_exception_try_exit");
ExceptionExtractFn =
CGM.CreateRuntimeFunction(llvm::FunctionType::get(ObjectPtrTy,
Params,
false),
"objc_exception_extract");
Params.clear();
Params.push_back(ClassPtrTy);
Params.push_back(ObjectPtrTy);
ExceptionMatchFn =
CGM.CreateRuntimeFunction(llvm::FunctionType::get(llvm::Type::Int32Ty,
Params,
false),
"objc_exception_match");
Params.clear();
Params.push_back(llvm::PointerType::getUnqual(llvm::Type::Int32Ty));
SetJmpFn =
CGM.CreateRuntimeFunction(llvm::FunctionType::get(llvm::Type::Int32Ty,
Params,
false),
"_setjmp");
}
ObjCNonFragileABITypesHelper::ObjCNonFragileABITypesHelper(CodeGen::CodeGenModule &cgm)