[Bug target/69007] New: [6 regression] test cases gcc.dg/vect/vect-reduc-dot-s8a.c fails starting with r231815

[seurer at linux dot vnet.ibm.com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69007

            Bug ID: 69007
           Summary: [6 regression] test cases
                    gcc.dg/vect/vect-reduc-dot-s8a.c fails starting with
                    r231815
           Product: gcc
           Version: 6.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: target
          Assignee: unassigned at gcc dot gnu.org
          Reporter: seurer at linux dot vnet.ibm.com
  Target Milestone: ---

It fails on both little and big endian on power8.  I tried this on an x86
machine and it succeeds.


PASS: gcc.dg/vect/vect-reduc-dot-s8a.c (test for excess errors)
PASS: gcc.dg/vect/vect-reduc-dot-s8a.c execution test
FAIL: gcc.dg/vect/vect-reduc-dot-s8a.c scan-tree-dump-times vect
"vect_recog_dot_prod_pattern: detected" 1
PASS: gcc.dg/vect/vect-reduc-dot-s8a.c scan-tree-dump-times vect
"vect_recog_widen_mult_pattern: detected" 1
PASS: gcc.dg/vect/vect-reduc-dot-s8a.c scan-tree-dump-times vect "vectorized 1
loops" 1
PASS: gcc.dg/vect/vect-reduc-dot-s8a.c -flto -ffat-lto-objects (test for excess
errors)
PASS: gcc.dg/vect/vect-reduc-dot-s8a.c -flto -ffat-lto-objects execution test
FAIL: gcc.dg/vect/vect-reduc-dot-s8a.c -flto -ffat-lto-objects 
scan-tree-dump-times vect "vect_recog_dot_prod_pattern: detected" 1
PASS: gcc.dg/vect/vect-reduc-dot-s8a.c -flto -ffat-lto-objects 
scan-tree-dump-times vect "vect_recog_widen_mult_pattern: detected" 1
PASS: gcc.dg/vect/vect-reduc-dot-s8a.c -flto -ffat-lto-objects 
scan-tree-dump-times vect "vectorized 1 loops" 1


Also gcc.dg/vect/vect-reduc-dot-u8a.c:

PASS: gcc.dg/vect/vect-reduc-dot-u8a.c (test for excess errors)
PASS: gcc.dg/vect/vect-reduc-dot-u8a.c execution test
FAIL: gcc.dg/vect/vect-reduc-dot-u8a.c scan-tree-dump-times vect
"vect_recog_dot_prod_pattern: detected" 1
PASS: gcc.dg/vect/vect-reduc-dot-u8a.c scan-tree-dump-times vect "vectorized 1
loops" 1
PASS: gcc.dg/vect/vect-reduc-dot-u8a.c scan-tree-dump-times vect "vectorized 1
loops" 1
PASS: gcc.dg/vect/vect-reduc-dot-u8a.c -flto -ffat-lto-objects (test for excess
errors)
PASS: gcc.dg/vect/vect-reduc-dot-u8a.c -flto -ffat-lto-objects execution test
FAIL: gcc.dg/vect/vect-reduc-dot-u8a.c -flto -ffat-lto-objects 
scan-tree-dump-times vect "vect_recog_dot_prod_pattern: detected" 1
PASS: gcc.dg/vect/vect-reduc-dot-u8a.c -flto -ffat-lto-objects 
scan-tree-dump-times vect "vectorized 1 loops" 1
PASS: gcc.dg/vect/vect-reduc-dot-u8a.c -flto -ffat-lto-objects 
scan-tree-dump-times vect "vectorized 1 loops" 1