https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92758
Bug ID: 92758
Summary: [10 regression] r278833 breaks
gcc.target/powerpc/fold-vec-splat-floatdouble.c
Product: gcc
Version: 10.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: target
Assignee: unassigned at gcc dot gnu.org
Reporter: seurer at gcc dot gnu.org
Target Milestone: ---
FAIL: gcc.target/powerpc/fold-vec-splat-floatdouble.c scan-assembler-times
xxpermdi 3
This is one of those tests that just counts assembler instructions and the
count of xxpermdi changed
seurer@makalu-lp1:~/gcc/build/gcc-test2$ diff
fold-vec-splat-floatdouble.s.r278832 fold-vec-splat-floatdouble.s.r278833
94c94,95
< xxpermdi 34,34,34,0
---
> xxlor 0,34,34
> xxpermdi 34,0,0,0
113c114,115
< xxpermdi 34,34,34,3
---
> xxpermdi 0,34,34,2
> xxpermdi 34,0,0,0
which in this case looks like missed optimization given the extra instructions
are just copying things needlessly between registers.
