[cfe-dev] merging of FunctionDecl's

[Douglas Gregor]

On Oct 28, 2009, at 5:43 AM, Roman Divacky wrote:

> Hi,
>
> example code:
>
> int func(void);					(1)
> extern int func (void) __asm__ ("FUNC");	(2)
>
> int func(void) {
>      return 42;
> }
>
>
> this piece of code has two declarators (1 and 2). When clang decides
> what symbol name the code goes like this:
>
> CodeGenModule::GetAddrOfFunction
>
> 	return GetOrCreateLLVMFunction(getMangledName(GD), Ty, GD);
>
>
> the getMangledName() calls
>
> 	if (!mangleName(getMangleContext(), ND, Out)) {
>
> which creates CXXNameMangler and tries to mangle the name via it:
>
>    CXXNameMangler Mangler(Context, os);
>    if (!Mangler.mangle(cast<NamedDecl>(D->getCanonicalDecl())))
>      return false;

This is actually this issue. We should be mangling based on the  
declaration we're given, not based on the canonical declaration (which  
is the first declaration and, therefore, does not have the attribute).  
Fixed here:

	http://lists.cs.uiuc.edu/pipermail/cfe-commits/Week-of-Mon-20091026/022863.html

	- Doug