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Add cleanups for exceptional edges. WIP.

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llvm-svn: 90940
This commit is contained in:
Mike Stump
2009-12-09 03:35:49 +00:00
parent daa3d6bb50
commit aff69af918
5 changed files with 174 additions and 34 deletions
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52
clang/lib/CodeGen/CGException.cpp
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@@ -650,3 +650,55 @@ void CodeGenFunction::EmitCXXTryStmt(const CXXTryStmt &S) {
EmitBlock(FinallyEnd);
}
CodeGenFunction::EHCleanupBlock::~EHCleanupBlock() {
llvm::BasicBlock *Cont1 = CGF.createBasicBlock("cont");
CGF.EmitBranch(Cont1);
CGF.setInvokeDest(PreviousInvokeDest);
CGF.EmitBlock(CleanupHandler);
llvm::Constant *Personality =
CGF.CGM.CreateRuntimeFunction(llvm::FunctionType::get(llvm::Type::getInt32Ty
(CGF.VMContext),
true),
"__gxx_personality_v0");
Personality = llvm::ConstantExpr::getBitCast(Personality, CGF.PtrToInt8Ty);
llvm::Value *llvm_eh_exception =
CGF.CGM.getIntrinsic(llvm::Intrinsic::eh_exception);
llvm::Value *llvm_eh_selector =
CGF.CGM.getIntrinsic(llvm::Intrinsic::eh_selector);
llvm::Value *Exc = CGF.Builder.CreateCall(llvm_eh_exception, "exc");
const llvm::IntegerType *Int8Ty;
const llvm::PointerType *PtrToInt8Ty;
Int8Ty = llvm::Type::getInt8Ty(CGF.VMContext);
// C string type. Used in lots of places.
PtrToInt8Ty = llvm::PointerType::getUnqual(Int8Ty);
llvm::Constant *Null = llvm::ConstantPointerNull::get(PtrToInt8Ty);
llvm::SmallVector<llvm::Value*, 8> Args;
Args.clear();
Args.push_back(Exc);
Args.push_back(Personality);
Args.push_back(Null);
CGF.Builder.CreateCall(llvm_eh_selector, Args.begin(), Args.end());
CGF.EmitBlock(CleanupEntryBB);
CGF.EmitBlock(Cont1);
if (CGF.getInvokeDest()) {
llvm::BasicBlock *Cont = CGF.createBasicBlock("invoke.cont");
CGF.Builder.CreateInvoke(getUnwindResumeOrRethrowFn(CGF), Cont,
CGF.getInvokeDest(), Exc);
CGF.EmitBlock(Cont);
} else
CGF.Builder.CreateCall(getUnwindResumeOrRethrowFn(CGF), Exc);
CGF.Builder.CreateUnreachable();
CGF.EmitBlock(Cont);
if (CGF.Exceptions)
CGF.setInvokeDest(CleanupHandler);
}