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Allow 'return exp;' for void main().

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It's unfortunate that for main the llvm type and D type don't match up...
This commit is contained in:
Christian Kamm 2009-02-17 18:53:15 +01:00
parent d6a264e74b
commit f62df176d6
2 changed files with 14 additions and 2 deletions
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9
gen/statements.cpp
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@ -90,10 +90,15 @@ void ReturnStatement::toIR(IRState* p)
if (Logger::enabled()) if (Logger::enabled())
Logger::cout() << "return value is '" <<*v << "'\n"; Logger::cout() << "return value is '" <<*v << "'\n";
// can happen for classes // can happen for classes and void main
if (v->getType() != p->topfunc()->getReturnType()) if (v->getType() != p->topfunc()->getReturnType())
{ {
v = gIR->ir->CreateBitCast(v, p->topfunc()->getReturnType(), "tmp"); // for main and a void expression: return 0 instead, else bitcast
if (p->topfunc() == p->mainFunc && v->getType() == LLType::VoidTy)
v = llvm::Constant::getNullValue(p->mainFunc->getReturnType());
else
v = gIR->ir->CreateBitCast(v, p->topfunc()->getReturnType(), "tmp");
if (Logger::enabled()) if (Logger::enabled())
Logger::cout() << "return value after cast: " << *v << '\n'; Logger::cout() << "return value after cast: " << *v << '\n';
} }

7
tests/mini/mainvoidreturn.d Normal file
View file

@ -0,0 +1,7 @@
void foo()
{}
void main()
{
return foo();
}