[Bug target/35926] Pushing / Poping ebx without using it.

[tony.poppleton at gmail dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=35926

--- Comment #8 from Tony Poppleton <tony.poppleton at gmail dot com> 2013-04-10 01:42:20 UTC ---
This appears to be fixed in GCC 4.8.0, compiling with just -S and -O3, the asm
output is now a much simpler:

        .file   "test.c"
        .text
        .p2align 4,,15
        .globl  add
        .type   add, @function
add:
.LFB0:
        .cfi_startproc
        andq    $-2, %rsi
        leaq    (%rdi,%rsi), %rax
        ret
        .cfi_endproc
.LFE0:
        .size   add, .-add
        .ident  "GCC: (GNU) 4.8.0 20130316 (Red Hat 4.8.0-0.17)"
        .section        .note.GNU-stack,"",@progbits