https://gcc.gnu.org/bugzilla/show_bug.cgi?id=61680
Bug ID: 61680
Summary: vectorization gives wrong answer for sandybridge
target
Product: gcc
Version: 4.9.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: fortran
Assignee: unassigned at gcc dot gnu.org
Reporter: longb at cray dot com
Created attachment 33056
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=33056&action=edit
test3.f90
Bad result:
> gfortran -march=corei7-avx -O3 test3.f90
> ./a.out
10.000000000000000
Good result:
> gfortran -march=corei7-avx -O3 -fno-tree-vectorize test3.f90
> ./a.out
13.114877048604001
>
Version info:
> gfortran --version
GNU Fortran (GCC) 4.9.0 20140422 (Cray Inc.)
Copyright (C) 2014 Free Software Foundation, Inc.
