https://gcc.gnu.org/bugzilla/show_bug.cgi?id=115282
Kewen Lin <linkw at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Last reconfirmed| |2024-05-31
Status|UNCONFIRMED |NEW
CC| |linkw at gcc dot gnu.org
Ever confirmed|0 |1
--- Comment #2 from Kewen Lin <linkw at gcc dot gnu.org> ---
(In reply to Richard Biener from comment #1)
> I don't see a good reason why, but I don't have a BE cross around to check
> myself. Does BE vect maybe not have unsigned integer vector multiplication
> support?
BE should have int vector mult too, I noticed it's guarded with TARGET_ALTIVEC.
The first loop (line 17) causes the difference, previously it did the splitting
like:
test.c:16:17: note: Splitting SLP group at stmt 6
test.c:16:17: note: Split group into 6 and 2
but now it won't and then seems to fail due to that:
test.c:16:17: note: ==> examining statement: _14 = in[_13];
test.c:16:17: missed: permutation requires at least three vectors _2 =
in[_1];
test.c:16:17: missed: unsupported load permutation
test.c:25:14: missed: not vectorized: relevant stmt not supported: _14 =
in[_13];
test.c:16:17: note: Cannot vectorize all-constant op node 0x140dd450
test.c:16:17: note: removing SLP instance operations starting from: out[_1] =
_17;
test.c:16:17: missed: unsupported SLP instances
test.c:16:17: note: re-trying with SLP disabled
test.c:16:17: note: vectorization_factor = 4, niters = 8
I can't figure out why it can pass on LE, so I did a test on LE and found it
fails on LE too!?
