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[Bug tree-optimization/18767] No vectorization for simple loop
- From: "pinskia at gcc dot gnu dot org" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: 21 Sep 2005 01:33:06 -0000
- Subject: [Bug tree-optimization/18767] No vectorization for simple loop
- References: <20041201205850.18767.bangerth@dealii.org>
- Reply-to: gcc-bugzilla at gcc dot gnu dot org
------- Additional Comments From pinskia at gcc dot gnu dot org 2005-09-21 01:33 -------
With -ffast-math on the mainline, we get:
_Z6foobarv:
.LFB2:
movaps b(%rip), %xmm1
mulps a(%rip), %xmm1
movaps %xmm1, %xmm2
movaps %xmm1, %xmm0
shufps $85, %xmm1, %xmm2
addss %xmm2, %xmm0
movaps %xmm1, %xmm2
unpckhps %xmm1, %xmm2
shufps $255, %xmm1, %xmm1
addss %xmm2, %xmm0
addss %xmm1, %xmm0
ret
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=18767