[Bug middle-end/46011] New: 256bit vectorizer failed on double->int

[Bug middle-end/46011] New: 256bit vectorizer failed on double->int

[hjl.tools at gmail dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=46011

           Summary: 256bit vectorizer failed on double->int
           Product: gcc
           Version: 4.6.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: middle-end
        AssignedTo: unassigned@gcc.gnu.org
        ReportedBy: hjl.tools@gmail.com


For gcc.target/i386/vectorize4-avx.c, vect256 branch
generates:

.L2:
    vmovaps    -120(%rsp,%rax), %ymm0
    vcvtps2pd    %xmm0, %ymm1
    vextractf128    $0x1, %ymm0, %xmm0
    vsqrtpd    %ymm1, %ymm1
    vcvttpd2dqy    %ymm1, %xmm1
    vmovdqu    %xmm1, (%rdi,%rax)
    vcvtps2pd    %xmm0, %ymm0
    vsqrtpd    %ymm0, %ymm0
    vcvttpd2dqy    %ymm0, %xmm0
    vmovdqu    %xmm0, 16(%rdi,%rax)
    addq    $32, %rax
    cmpq    $1024, %rax
    jne    .L2

Trunk at revision 165455 generates

.L2:
    vmovaps    -120(%rsp,%rax), %xmm1
    vmovhlps    %xmm1, %xmm0, %xmm0
    vcvtps2pd    %xmm1, %xmm2
    vsqrtpd    %xmm2, %xmm2
    vcvttpd2dqx    %xmm2, %xmm2
    vcvtps2pd    %xmm0, %xmm1
    vsqrtpd    %xmm1, %xmm1
    vcvttpd2dqx    %xmm1, %xmm1
    vpunpcklqdq    %xmm1, %xmm2, %xmm1
    vmovdqu    %xmm1, (%rdi,%rax)
    addq    $16, %rax
    cmpq    $1024, %rax
    jne    .L2

[Bug middle-end/46011] 256bit vectorizer failed on double->int

[hjl at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=46011

--- Comment #1 from hjl at gcc dot gnu.org <hjl at gcc dot gnu.org> 2010-10-14 08:33:13 UTC ---
Author: hjl
Date: Thu Oct 14 08:33:09 2010
New Revision: 165457

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=165457
Log:
Scan 256bit AVX register and xfail vectorize4-avx.c.

2010-10-14  H.J. Lu  <hongjiu.lu@intel.com>

    PR middle-end/46011
    * gcc.target/i386/vectorize4-avx.c: Scan 256bit AVX register
    and xfail.

Modified:
    trunk/gcc/testsuite/ChangeLog
    trunk/gcc/testsuite/gcc.target/i386/vectorize4-avx.c

[Bug tree-optimization/46011] 256bit vectorizer failed on double->int

[rguenth at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=46011

Richard Guenther <rguenth at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |NEW
   Last reconfirmed|                            |2010.10.14 08:36:25
          Component|middle-end                  |tree-optimization
     Ever Confirmed|0                           |1
           Severity|normal                      |enhancement

--- Comment #2 from Richard Guenther <rguenth at gcc dot gnu.org> 2010-10-14 08:36:25 UTC ---
Yep, that's a known limitation with the new scheme which just allows one
vector size per loop.  It needs special support in the vectorize_conversion
routine.

[Bug tree-optimization/46011] 256bit vectorizer failed on double->int

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=46011

Richard Biener <rguenth at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
         Resolution|---                         |FIXED
             Status|NEW                         |RESOLVED

--- Comment #3 from Richard Biener <rguenth at gcc dot gnu.org> ---
Fixed in GCC10+