[Bug 1334919] Comment bridged from LTC Bugzilla

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Thu Oct 9 11:09:31 UTC 2014


------- Comment From thierry.fauck at fr.ibm.com 2014-10-09 11:05 EDT-------
I retrieved the testsuite from : wget http://ftp.gnu.org/gnu/gcc/gcc-4.9.1/gcc-4.9.1.tar.bz2

Checked the test case:
gcc/testsuite/gcc.dg/vect$ make vect-nop-move
cc     vect-nop-move.c   -o vect-nop-move
gcc/testsuite/gcc.dg/vect$ ./vect-nop-move
gcc/testsuite/gcc.dg/vect$ echo $?
0

$ dpkg -l |grep gcc
ii  gcc                                    4:4.9.1-4ubuntu2                     ppc64el      GNU C compiler
ii  gcc-4.9                                4.9.1-16ubuntu4                      ppc64el      GNU C compiler
ii  gcc-4.9-base:ppc64el                   4.9.1-16ubuntu4                      ppc64el      GCC, the GNU Compiler Collection (base package)
ii  gccgo                                  4:4.9.1-4ubuntu2                     ppc64el      Go compiler, based on the GCC backend
ii  gccgo-4.9                              4.9.1-16ubuntu4                      ppc64el      GNU Go compiler
ii  libgcc-4.9-dev:ppc64el                 4.9.1-16ubuntu4                      ppc64el      GCC support library (development files)
ii  libgcc1:ppc64el                        1:4.9.1-16ubuntu4                    ppc64el      GCC support library

$ uname -a
Linux fauck4 3.16.0-20-generic #27-Ubuntu SMP Wed Oct 1 17:24:38 UTC 2014 ppc64le ppc64le ppc64le GNU/Linux

Can you verify or confirm it is fixed

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https://bugs.launchpad.net/bugs/1334919

Title:
  gcc48, gcc49: vect-nop-move.c fails on powerpc64le-unknown-linux-gnu
  (FSF PR 61542)

Status in “gcc-4.8-ppc64el-cross” package in Ubuntu:
  New

Bug description:
  ---Problem Description---
  https://gcc.gnu.org/bugzilla/show_bug.cgi?id=61542 describes a problem with the vec_extract operation on a V4SFmode vector on powerpc64le-linux-gnu:

  "A test case (gcc.dg/vect/vect-nop-move.c) was added in 4.9 that
  exposes a bug on PowerPC little endian for extracting an element from
  a V4SF value.  When attempting to extract element N, element 3 - N is
  extracted instead when N <> 3."

  This problem has been fixed upstream in GCC 4.8 (r212050), 4.9 (r212048), and trunk (r212047). The fix should be picked up for 14.04.1 and 14.10, please.
   
   
  Machine Type = Power8 
    
  ---Steps to Reproduce---
  Compile the test case associated with the bug report.

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