IRLandingPadInfo::IRLandingPadInfo(Catch* catchstmt, llvm::BasicBlock* end)
: finallyBody(NULL)
{
target = llvm::BasicBlock::Create(gIR->context(), "catch", gIR->topfunc(), end);
gIR->scope() = IRScope(target,end);
DtoDwarfBlockStart(catchstmt->loc);
// assign storage to catch var
if(catchstmt->var) {
// use the same storage for all exceptions that are not accessed in
// nested functions
#if DMDV2
if(!catchstmt->var->nestedrefs.dim) {
#else
if(!catchstmt->var->nestedref) {
#endif
assert(!catchstmt->var->ir.irLocal);
catchstmt->var->ir.irLocal = new IrLocal(catchstmt->var);
LLValue* catch_var = gIR->func()->gen->landingPadInfo.getExceptionStorage();
catchstmt->var->ir.irLocal->value = gIR->ir->CreateBitCast(catch_var, getPtrToType(DtoType(catchstmt->var->type)));
}
// this will alloca if we haven't already and take care of nested refs
DtoDeclarationExp(catchstmt->var);
// the exception will only be stored in catch_var. copy it over if necessary
if(catchstmt->var->ir.irLocal->value != gIR->func()->gen->landingPadInfo.getExceptionStorage()) {
LLValue* exc = gIR->ir->CreateBitCast(DtoLoad(gIR->func()->gen->landingPadInfo.getExceptionStorage()), DtoType(catchstmt->var->type));
DtoStore(exc, catchstmt->var->ir.irLocal->value);
}
}
// emit handler, if there is one
// handler is zero for instance for 'catch { debug foo(); }'
if(catchstmt->handler)
catchstmt->handler->toIR(gIR);
if (!gIR->scopereturned())
gIR->ir->CreateBr(end);
assert(catchstmt->type);
catchType = catchstmt->type->toBasetype()->isClassHandle();
assert(catchType);
catchType->codegen(Type::sir);
DtoDwarfBlockEnd();
}
IRLandingPadInfo::IRLandingPadInfo(Statement* finallystmt)
: target(NULL), finallyBody(finallystmt), catchType(NULL)
{
}
void IRLandingPad::addCatch(Catch* catchstmt, llvm::BasicBlock* end)
{
unpushed_infos.push_front(IRLandingPadInfo(catchstmt, end));
}
void IRLandingPad::addFinally(Statement* finallystmt)
{
unpushed_infos.push_front(IRLandingPadInfo(finallystmt));
}
void IRLandingPad::addCatch(Catch* catchstmt, llvm::BasicBlock* end)
{
unpushed_infos.push_front(IRLandingPadInfo(catchstmt, end));
}
