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[Bug middle-end/64909] [4.8/5 regression] Missed vectorization
- From: "hjl.tools at gmail dot com" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: Mon, 02 Feb 2015 23:43:12 +0000
- Subject: [Bug middle-end/64909] [4.8/5 regression] Missed vectorization
- Auto-submitted: auto-generated
- References: <bug-64909-4 at http dot gcc dot gnu dot org/bugzilla/>
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64909
H.J. Lu <hjl.tools at gmail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |WAITING
Last reconfirmed| |2015-02-02
Ever confirmed|0 |1
--- Comment #2 from H.J. Lu <hjl.tools at gmail dot com> ---
Today's mainline generates:
movzwl a+16(%rip), %eax
pxor %xmm1, %xmm1
movdqa a(%rip), %xmm0
movdqa %xmm0, %xmm2
movl %eax, b+32(%rip)
movzwl a+18(%rip), %eax
punpcklwd %xmm1, %xmm2
punpckhwd %xmm1, %xmm0
movl %eax, b+36(%rip)
movzwl a+20(%rip), %eax
movaps %xmm2, b(%rip)
movaps %xmm0, b+16(%rip)
movl %eax, b+40(%rip)
movzwl a+22(%rip), %eax
movl %eax, b+44(%rip)
ret
at -O3.