https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68775
Bug ID: 68775
Summary: spec2006 test case 465.tonto fails with the gcc 6.0
fortran compiler
Product: gcc
Version: 6.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: tree-optimization
Assignee: unassigned at gcc dot gnu.org
Reporter: seurer at linux dot vnet.ibm.com
Target Milestone: ---
The spec2006 test case 465.tonto fails with the gcc 6.0 fortran compiler on
powerpc. The failure started with revision r230855. The compilation works but
the output of the test is wrong.
r230855 | rguenth | 2015-11-25 02:53:22 -0600 (Wed, 25 Nov 2015) | 6 lines
2015-11-25 Richard Biener <rguent...@suse.de>
PR tree-optimization/68492
* tree-vect-slp.c (vect_build_slp_tree): Consistently build up
op from scalars after operand swapping.
Options used were: -m64 -O3 -mcpu=power8 -fpeel-loops -funroll-loops
-ffast-math -fvect-cost-model -mpopcntd -mrecip=rsqrt
Minimal option set to cause the failure: -m64 -O3 -mcpu=power8 -ffast-math
Note that it succeeds with -mcpu=power7
