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From: "crazylht at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug rtl-optimization/97249] Missing vec_select and subreg optimization
Date: Wed, 30 Sep 2020 06:38:21 +0000 [thread overview]
Message-ID: <bug-97249-4-DmEPSJ3rYk@http.gcc.gnu.org/bugzilla/> (raw)
In-Reply-To: <bug-97249-4@http.gcc.gnu.org/bugzilla/>
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=97249
--- Comment #1 from Hongtao.liu <crazylht at gmail dot com> ---
for i386 backend, maybe we can adjust pattern of
diff --git a/gcc/config/i386/sse.md b/gcc/config/i386/sse.md
index 934b60a288f..2bfa9635fab 100644
--- a/gcc/config/i386/sse.md
+++ b/gcc/config/i386/sse.md
@@ -17658,12 +17658,7 @@ (define_expand "<code>v32qiv32hi2"
(define_insn "sse4_1_<code>v8qiv8hi2<mask_name>"
[(set (match_operand:V8HI 0 "register_operand" "=Yr,*x,v")
(any_extend:V8HI
- (vec_select:V8QI
- (match_operand:V16QI 1 "register_operand" "Yr,*x,v")
- (parallel [(const_int 0) (const_int 1)
- (const_int 2) (const_int 3)
- (const_int 4) (const_int 5)
- (const_int 6) (const_int 7)]))))]
+ (subreg:V8QI(match_operand:V16QI 1 "register_operand" "Yr,*x,v")
0)))]
"TARGET_SSE4_1 && <mask_avx512bw_condition> && <mask_avx512vl_condition>"
"%vpmov<extsuffix>bw\t{%1, %0<mask_operand2>|%0<mask_operand2>, %1}"
[(set_attr "isa" "noavx,noavx,avx")
next prev parent reply other threads:[~2020-09-30 6:38 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-09-30 6:30 [Bug rtl-optimization/97249] New: " crazylht at gmail dot com
2020-09-30 6:38 ` crazylht at gmail dot com [this message]
2020-09-30 6:39 ` [Bug rtl-optimization/97249] " crazylht at gmail dot com
2020-09-30 6:48 ` rguenth at gcc dot gnu.org
2020-10-12 2:23 ` crazylht at gmail dot com
2020-10-12 14:53 ` segher at gcc dot gnu.org
2020-10-13 1:59 ` crazylht at gmail dot com
2020-10-13 6:08 ` crazylht at gmail dot com
2020-10-22 3:38 ` cvs-commit at gcc dot gnu.org
2020-10-22 3:38 ` crazylht at gmail dot com
2021-08-21 18:28 ` pinskia at gcc dot gnu.org
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