https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69019
Bug ID: 69019
Summary: [5 regression] Failure of test case
gcc.target/powerpc/ti_math1.c
Product: gcc
Version: 5.0
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: ---
PASS: gcc.target/powerpc/ti_math1.c (test for excess errors)
PASS: gcc.target/powerpc/ti_math1.c scan-assembler-times addc 1
FAIL: gcc.target/powerpc/ti_math1.c scan-assembler-times adde 1
PASS: gcc.target/powerpc/ti_math1.c scan-assembler-times subfc 1
PASS: gcc.target/powerpc/ti_math1.c scan-assembler-times subfe 1
PASS: gcc.target/powerpc/ti_math1.c scan-assembler-not subf
Seen with gcc-5-branch revision 231903. I don't know when this started failing
This test works with gcc 4.9 and gcc 6 and works with gcc 5 on big endian.
The problem can be seen here when comparing the assembler from gcc 6 with that
from 5:
seurer@genoa:~/tests/gcc$ diff ti_math1.s.gcc5 ti_math1.s.gcc6
13,14c13
< addze 5,5
< add 4,5,10
---
> adde 4,5,10
It also only occurs with -O2
With -O2:
addze 5,5
add 4,5,10
With -O1:
adde 4,5,10
