[Issue 9931] Mac OS X ABI not followed when returning structs for extern (C)

[d-bugmail at puremagic.com]

http://d.puremagic.com/issues/show_bug.cgi?id=9931



--- Comment #28 from Jacob Carlborg <doob at me.com> 2013-04-27 07:15:30 PDT ---
(In reply to comment #27)
> Can you be a little more precise?
> Does it fail for the code in comment 22?

Yes, the code in comment 22.

> So everything in C or D?

The disassembly is in C. Below is the disassembly for the D version of the
"bar" function from comment 22:

_D4main3barFZS4main3Foo:
0000000100000b6c        pushq   %rbp
0000000100000b6d        movq    %rsp,%rbp
0000000100000b70        subq    $0x20,%rsp
0000000100000b74        movq    %rdi,0xf8(%rbp)
0000000100000b78        xorl    %esi,%esi
0000000100000b7a        leaq    0xe8(%rbp),%rdi
0000000100000b7e        callq   _foo
0000000100000b83        leaq    0xe8(%rbp),%rsi
0000000100000b87        movq    0xf8(%rbp),%rdi
0000000100000b8b        movsq   (%esi),(%edi)
0000000100000b8d        movsb   (%esi),(%edi)
0000000100000b8e        movsb   (%esi),(%edi)
0000000100000b8f        movsb   (%esi),(%edi)
0000000100000b90        movsb   (%esi),(%edi)
0000000100000b91        movq    0xf8(%rbp),%rax
0000000100000b95        leave
0000000100000b96        ret
0000000100000b97        nopl    0x00(%rax,%rax)

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