https://gcc.gnu.org/bugzilla/show_bug.cgi?id=106345
Bug ID: 106345
Summary: Some ppc64le tests fail with -mcpu=power9
-mtune=power9
Product: gcc
Version: 12.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: testsuite
Assignee: unassigned at gcc dot gnu.org
Reporter: mpolacek at gcc dot gnu.org
Target Milestone: ---
A few tests fail when GCC is configured with --with-cpu-64=power9
--with-tune-64=power9:
gcc.target/powerpc/lhs-3.c
gcc.target/powerpc/loop_align.c
gcc.target/powerpc/pr92398.p9-.c
It would be nice if we could strengthen the tests to pass with -mtune=power9
-mcpu=power9 too.
In detail:
# gcc -O2 -mdejagnu-cpu=power7 lhs-3.c -S -mtune=power8
# grep ori lhs-3.s
ori 2,2,0
but with the power9 default:
# gcc -O2 -mdejagnu-cpu=power7 lhs-3.c -S
# grep ori lhs-3.s
#
The second:
# gcc loop_align.c -fdiagnostics-plain-output -O2 -mdejagnu-cpu=power7
-falign-functions=16 -fno-unroll-loops -ffat-lto-objects -fno-ident -S -o
loop_align.s
# grep p2align loop_align.s
.p2align 4,,15
.p2align 4,,15
# gcc loop_align.c -fdiagnostics-plain-output -O2 -mdejagnu-cpu=power7
-falign-functions=16 -fno-unroll-loops -ffat-lto-objects -fno-ident -S -o
loop_align.s -mtune=power8
# grep p2align loop_align.s
.p2align 4,,15
.p2align 5
And the third test:
# gcc pr92398.p9-.c -fdiagnostics-plain-output -O2 -mvsx -ffat-lto-objects
-fno-ident -S -o pr92398.p9-.s -mtune=power8 -mcpu=power8
# grep -E '(std|not)' pr92398.p9-.s
not 4,4
not 5,5
std 4,0(3)
std 5,8(3)
.section .note.GNU-stack,"",@progbits
# gcc pr92398.p9-.c -fdiagnostics-plain-output -O2 -mvsx -ffat-lto-objects
-fno-ident -S -o pr92398.p9-.s
# grep -E '(std|not)' pr92398.p9-.s
.section .note.GNU-stack,"",@progbits
