[Bug target/37169] New: [4.4 Regression] Inefficent code for _mm_cvtsi64_si128

[Bug target/37169] New: [4.4 Regression] Inefficent code for _mm_cvtsi64_si128

[hjl dot tools at gmail dot com]

[hjl@gnu-6 i386]$ cat x.c
/* { dg-do run } */
/* { dg-options "-O2 -msse2" } */

#include <emmintrin.h>

__m128i
test (long long b)
{
  return _mm_cvtsi64_si128 (b); 
}
[hjl@gnu-6 i386]$
/export/build/gnu/gcc-avx-internal/build-x86_64-linux/gcc/xgcc
-B/export/build/gnu/gcc-avx-internal/build-x86_64-linux/gcc/ -DDEBUG -Wall
-Werror  -mfpmath=sse x.c -S  -O2 -msse4 -march=core2
[hjl@gnu-6 i386]$ cat x.s
        .file   "x.c"
        .text
        .p2align 4,,15
.globl test
        .type   test, @function
test:
.LFB493:
        .cfi_startproc
        pxor    %xmm0, %xmm0
        pinsrq  $0, %rdi, %xmm0
        ret
        .cfi_endproc
.LFE493:
        .size   test, .-test
[hjl@gnu-6 i386]$ 

Gcc 4.3 generates
hjl@gnu-6 i386]$ gcc  x.c -S  -O2 -msse4 -march=core2[hjl@gnu-6 i386]$ cat x.s
        .file   "x.c"
        .text
        .p2align 4,,15
.globl test
        .type   test, @function
test:
.LFB518:
        movq    %rdi, %xmm0
        ret


-- 
           Summary: [4.4 Regression] Inefficent code for _mm_cvtsi64_si128
           Product: gcc
           Version: 4.4.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: target
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: hjl dot tools at gmail dot com
GCC target triplet: x86_64-unknown-linux-gnu


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=37169

[Bug target/37169] [4.4 Regression] Inefficent code for _mm_cvtsi64_si128

[hjl dot tools at gmail dot com]

------- Comment #1 from hjl dot tools at gmail dot com  2008-08-20 01:39 -------
A patch is posted at

http://gcc.gnu.org/ml/gcc-patches/2008-08/msg01351.html


-- 

hjl dot tools at gmail dot com changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                URL|                            |http://gcc.gnu.org/ml/gcc-
                   |                            |patches/2008-
                   |                            |08/msg01351.html


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=37169

[Bug target/37169] [4.4 Regression] Inefficent code for _mm_cvtsi64_si128

[hjl at gcc dot gnu dot org]

------- Comment #2 from hjl at gcc dot gnu dot org  2008-08-20 13:23 -------
Subject: Bug 37169

Author: hjl
Date: Wed Aug 20 13:22:30 2008
New Revision: 139289

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=139289
Log:
gcc/

2008-08-20  H.J. Lu  <hongjiu.lu@intel.com>

        PR target/37169
        * config/i386/i386.c (ix86_expand_vector_init_one_nonzero): In
        V2DI mode, for SSE4.1, use movq instead of vector set if the
        second element is zero and inter-unit moves are OK.

gcc/testsuite/

2008-08-20  H.J. Lu  <hongjiu.lu@intel.com>

        PR target/37169
        * i386/sse2-init-v2di-2.c: New.

Added:
    trunk/gcc/testsuite/gcc.target/i386/sse2-init-v2di-2.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/config/i386/i386.c
    trunk/gcc/testsuite/ChangeLog


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=37169

[Bug target/37169] [4.4 Regression] Inefficent code for _mm_cvtsi64_si128

[hjl dot tools at gmail dot com]

------- Comment #3 from hjl dot tools at gmail dot com  2008-08-20 21:17 -------
Fixed.


-- 

hjl dot tools at gmail dot com changed:

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


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=37169

[Bug target/37169] [4.4 Regression] Inefficent code for _mm_cvtsi64_si128

[pinskia at gcc dot gnu dot org]

-- 

pinskia at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |pinskia at gcc dot gnu dot
                   |                            |org
   Target Milestone|---                         |4.4.0


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=37169