[Bug optimization/11180] [avr-gcc] Optimization decrease performance of struct assignment.

["steven at gcc dot gnu dot org" <gcc-bugzilla at gcc dot gnu dot org>]

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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=11180



------- Additional Comments From steven at gcc dot gnu dot org  2003-07-10 13:38 -------
On i686-pc-linux-gnu I get identical asm for -O2 and -O3 and also for -O1 and
-Os.   The only difference between -O[23] and -O[1s] is:
<       .p2align 2,,3

        .file   "11180.c"
        .text
        .p2align 2,,3
.globl foo
        .type   foo, @function
foo:
        pushl   %ebp
        movl    %esp, %ebp
        movl    8(%ebp), %eax
        movl    $1, (%eax)
        movl    $2, 4(%eax)
        leave
        ret     $4
        .size   foo, .-foo
        .section        .note.GNU-stack,"",@progbits
        .ident  "GCC: (GNU) 3.4 20030710 (experimental)"

So -Os is optimal AFAICT (obviously it gets even smaller with -fomit-frame-pointer).

Apparently this is something target specific.  What target is avr-gcc?

Gr.
Steven