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Add support for __builtin_unwind_init. 

Also, committing an #if 0'ed __builtin_setjmp and __builtin_longjmp 
implementation I've had sitting in my tree for a while.  I haven't 
enabled it because the LLVM backend support isn't complete yet.

llvm-svn: 72727
This commit is contained in:
Eli Friedman 2009-06-02 09:37:50 +00:00
parent 9baa191f31
commit cb9d07caeb
2 changed files with 34 additions and 0 deletions
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30
clang/lib/CodeGen/CGBuiltin.cpp
View File

@ -320,6 +320,36 @@ RValue CodeGenFunction::EmitBuiltinExpr(const FunctionDecl *FD,
// FIXME: There should be a target hook for this
return RValue::get(EmitScalarExpr(E->getArg(0)));
}
case Builtin::BI__builtin_unwind_init: {
Value *F = CGM.getIntrinsic(Intrinsic::eh_unwind_init, 0, 0);
return RValue::get(Builder.CreateCall(F));
}
#if 0
// FIXME: Finish/enable when LLVM backend support stabilizes
case Builtin::BI__builtin_setjmp: {
Value *Buf = EmitScalarExpr(E->getArg(0));
// Store the frame pointer to the buffer
Value *FrameAddrF = CGM.getIntrinsic(Intrinsic::frameaddress, 0, 0);
Value *FrameAddr =
Builder.CreateCall(FrameAddrF,
Constant::getNullValue(llvm::Type::Int32Ty));
Builder.CreateStore(FrameAddr, Buf);
// Call the setjmp intrinsic
Value *F = CGM.getIntrinsic(Intrinsic::eh_sjlj_setjmp, 0, 0);
const llvm::Type *DestType =
llvm::PointerType::getUnqual(llvm::Type::Int8Ty);
Buf = Builder.CreateBitCast(Buf, DestType);
return RValue::get(Builder.CreateCall(F, Buf));
}
case Builtin::BI__builtin_longjmp: {
Value *F = CGM.getIntrinsic(Intrinsic::eh_sjlj_longjmp, 0, 0);
Value *Buf = EmitScalarExpr(E->getArg(0));
const llvm::Type *DestType =
llvm::PointerType::getUnqual(llvm::Type::Int8Ty);
Buf = Builder.CreateBitCast(Buf, DestType);
return RValue::get(Builder.CreateCall(F, Buf));
}
#endif
case Builtin::BI__sync_fetch_and_add:
case Builtin::BI__sync_fetch_and_sub:
case Builtin::BI__sync_fetch_and_or:

4
clang/test/CodeGen/builtin-unwind-init.c Normal file
View File

@ -0,0 +1,4 @@
// RUN: clang-cc -emit-llvm < %s -o - | grep -F "llvm.eh.unwind.init"
int a() { __builtin_unwind_init(); }