[mac os/x86] Structures <= 8 bytes should be returned in registers

[lattner]

Bugzilla Link	785
Resolution	FIXED
Resolved on	Feb 22, 2010 12:49
Version	1.6
OS	MacOS X

Extended Description

Consider this example:
struct X { double D; };
struct Y { struct X x;};

struct Y bar();
void foo(struct Y *P) {
*P = bar();
}

The result of bar() should be in ST0 on Darwin/x86.

-Chris

[lattner]

This is fixed in llvm-gcc4.

[lattner]

This is fixed in llvm-gcc4 and llvmgcc3 doesn't support mac os/x86.

-Chris