[Bug target/98119] [10/11 Regression] SVE: Wrong code with -O1 -ftree-vectorize -msve-vector-bits=512 -mtune=thunderx
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98119 --- Comment #4 from CVS Commits --- The master branch has been updated by Richard Sandiford : https://gcc.gnu.org/g:1393938e4c7dab9306cdce5a73d93b242fc246ec commit r11-7927-g1393938e4c7dab9306cdce5a73d93b242fc246ec Author: Richard Sandiford Date: Wed Mar 31 11:26:06 2021 +0100 aarch64: Fix target alignment for SVE [PR98119] The vectoriser supports peeling for alignment using predication: we move back to the previous aligned boundary and make the skipped elements inactive in the first loop iteration. As it happens, the costs for existing CPUs give an equal cost to aligned and unaligned accesses, so this feature is rarely used. However, the PR shows that when the feature was forced on, we were still trying to align to a full-vector boundary even when using partial vectors. gcc/ PR target/98119 * config/aarch64/aarch64.c (aarch64_vectorize_preferred_vector_alignment): Query the size of the provided SVE vector; do not assume that all SVE vectors have the same size. gcc/testsuite/ PR target/98119 * gcc.target/aarch64/sve/pr98119.c: New test.
[Bug target/98119] [10/11 Regression] SVE: Wrong code with -O1 -ftree-vectorize -msve-vector-bits=512 -mtune=thunderx
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98119 rsandifo at gcc dot gnu.org changed: What|Removed |Added Status|NEW |ASSIGNED Assignee|unassigned at gcc dot gnu.org |rsandifo at gcc dot gnu.org --- Comment #3 from rsandifo at gcc dot gnu.org --- Mine.
[Bug target/98119] [10/11 Regression] SVE: Wrong code with -O1 -ftree-vectorize -msve-vector-bits=512 -mtune=thunderx
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98119 Richard Biener changed: What|Removed |Added Priority|P3 |P2
[Bug target/98119] [10/11 Regression] SVE: Wrong code with -O1 -ftree-vectorize -msve-vector-bits=512 -mtune=thunderx
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98119 Richard Biener changed: What|Removed |Added Target Milestone|--- |10.3
[Bug target/98119] [10/11 Regression] SVE: Wrong code with -O1 -ftree-vectorize -msve-vector-bits=512 -mtune=thunderx
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98119 Alex Coplan changed: What|Removed |Added Summary|SVE: Wrong code with -O1|[10/11 Regression] SVE: |-ftree-vectorize|Wrong code with -O1 |-msve-vector-bits=512 |-ftree-vectorize |-mtune=thunderx |-msve-vector-bits=512 ||-mtune=thunderx --- Comment #2 from Alex Coplan --- Started with r10-4749-gcc68f7c2dabbf9d90ebe025a11f6d6ed5d49a113, FWIW.
