https://gcc.gnu.org/g:18668d9c196a36dc7c0cd698a2a767b8f8c8e8a4
commit r15-9053-g18668d9c196a36dc7c0cd698a2a767b8f8c8e8a4
Author: Richard Biener <rguent...@suse.de>
Date: Thu Mar 27 11:29:21 2025 +0100
target/119010 - missing reservations for Zen4/5 and SSE compares
There's the znver4_sse_test reservation which matches the memory-less
SSE compares but currently requires prefix_extra == 1. The old
znver automata in this case sometimes uses znver1-double instead of
znver1-direct, but it's quite a maze. The following simply drops
the prefix_extra requirement, but I have no idea what I'm doing here.
There doesn't seem to be any documentation on the scheduler relevant
attributes used, or at least I cannot find that.
PR target/119010
* config/i386/zn4zn5.md (znver4_sse_test): Drop test of
prefix_extra attribute.
Diff:
---
gcc/config/i386/zn4zn5.md | 5 ++---
1 file changed, 2 insertions(+), 3 deletions(-)
diff --git a/gcc/config/i386/zn4zn5.md b/gcc/config/i386/zn4zn5.md
index fb856e9dc988..40e51456a461 100644
--- a/gcc/config/i386/zn4zn5.md
+++ b/gcc/config/i386/zn4zn5.md
@@ -953,9 +953,8 @@
(define_insn_reservation "znver4_sse_test" 1
(and (eq_attr "cpu" "znver4,znver5")
- (and (eq_attr "prefix_extra" "1")
- (and (eq_attr "type" "ssecomi")
- (eq_attr "memory" "none"))))
+ (and (eq_attr "type" "ssecomi")
+ (eq_attr "memory" "none")))
"znver4-direct,znver4-fpu1|znver4-fpu2")
(define_insn_reservation "znver4_sse_test_load" 6
