[Bug middle-end/37774] [4.4 Regression] Alignment information is lost for ARRAY_REFs

[hjl dot tools at gmail dot com]

------- Comment #4 from hjl dot tools at gmail dot com  2008-10-08 20:55 -------
(In reply to comment #3)
> Newer patch http://gcc.gnu.org/ml/gcc-patches/2008-10/msg00350.html
> 

With this patch, I got

.globl foo
        .type   foo, @function
foo:
        xorl    %eax, %eax
        .p2align 4,,10
        .p2align 3
.L2:
        pabsw   src(%rax), %xmm0
        movdqa  %xmm0, resdst(%rax)
        addq    $16, %rax
        cmpq    $160, %rax
        jne     .L2
        rep
        ret

The load is combined into pabsw. The extra load insn and unaligned move
are gone.


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=37774