[Bug tree-optimization/43692] small loop not vectorized

[wbrana at gmail dot com]

------- Comment #6 from wbrana at gmail dot com  2010-04-08 18:31 -------
Loop is vectorized with GCC 4.4 if these flags are used: 
-O1 -ftree-vectorize -march=core2

.LFB0:
        .cfi_startproc
        movaps  b(%rip), %xmm0
        addps   c(%rip), %xmm0
        movaps  %xmm0, a(%rip)
        ret
        .cfi_endproc

How can I prevent unrolling of this loop with O3 ?


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=43692