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From: "pinskia at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/101529] wrong code with __builtin_convertvector() and __builtin_shufflevector() at -Og
Date: Tue, 20 Jul 2021 21:56:32 +0000 [thread overview]
Message-ID: <bug-101529-4-YALvnTm0kn@http.gcc.gnu.org/bugzilla/> (raw)
In-Reply-To: <bug-101529-4@http.gcc.gnu.org/bugzilla/>
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=101529
Andrew Pinski <pinskia at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Last reconfirmed| |2021-07-20
Status|UNCONFIRMED |NEW
Ever confirmed|0 |1
--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Confirmed.
-Og:
_13 = BIT_FIELD_REF <_12, 64, 0>;
_4 = VEC_PERM_EXPR <_13, { 0, 0, 0, 0, 0, 0, 0, 0 }, { 3, 9, 10, 11, 12, 13,
14, 15 }>;
_14 = BIT_FIELD_REF <_4, 8, 0>;
vs -O2:
_14 = BIT_FIELD_REF <_12, 8, 24>;
Huh:
;; _4 = VEC_PERM_EXPR <_13, { 0, 0, 0, 0, 0, 0, 0, 0 }, { 3, 9, 10, 11, 12, 13,
14, 15 }>;
(insn 16 15 17 (set (reg:V8QI 95 [ _4 ])
(vec_select:V8QI (reg:V16QI 98 [ _12 ])
(parallel [
(const_int 0 [0])
(const_int 1 [0x1])
(const_int 2 [0x2])
(const_int 3 [0x3])
(const_int 4 [0x4])
(const_int 5 [0x5])
(const_int 6 [0x6])
(const_int 7 [0x7])
]))) "t5.c":11:10 -1
(nil))
;;; Select the lower part aka _13
(insn 17 16 18 (set (reg:V8QI 112)
(const_vector:V8QI [
(const_int 0 [0]) repeated x8
])) "t5.c":11:10 -1
(nil))
(insn 18 17 19 (set (reg:V8QI 95 [ _4 ])
(reg:V8QI 112)) "t5.c":11:10 -1
(nil))
;;; BUT reuse 95/_4 for the zero constant!!!!!!!!!!!!!!!
(insn 19 18 0 (set (reg:V8QI 95 [ _4 ])
(vec_merge:V8QI (vec_duplicate:V8QI (vec_select:QI (reg:V8QI 95 [ _4 ])
(parallel [
(const_int 3 [0x3])
])))
(reg:V8QI 95 [ _4 ])
(const_int 1 [0x1]))) "t5.c":11:10 -1
(nil))
next prev parent reply other threads:[~2021-07-20 21:56 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-07-20 15:30 [Bug target/101529] New: " zsojka at seznam dot cz
2021-07-20 21:56 ` pinskia at gcc dot gnu.org [this message]
2021-08-11 19:27 ` [Bug target/101529] " pinskia at gcc dot gnu.org
2021-11-06 6:18 ` [Bug target/101529] [11/12 Regression] " pinskia at gcc dot gnu.org
2021-11-06 6:18 ` pinskia at gcc dot gnu.org
2021-11-06 6:19 ` pinskia at gcc dot gnu.org
2021-11-06 6:23 ` [Bug target/101529] [11/12 Regression] wrong code with __builtin_convertvector() and __builtin_shufflevector() at -Og caused by r11-2192 pinskia at gcc dot gnu.org
2021-11-06 6:49 ` pinskia at gcc dot gnu.org
2021-11-06 19:31 ` pinskia at gcc dot gnu.org
2021-11-10 4:07 ` cvs-commit at gcc dot gnu.org
2021-11-10 4:09 ` [Bug target/101529] [11 " pinskia at gcc dot gnu.org
2022-01-26 17:51 ` cvs-commit at gcc dot gnu.org
2022-01-26 17:52 ` pinskia at gcc dot gnu.org
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