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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/94617] Simple if condition not optimized Date: Sun, 25 Jun 2023 22:29:49 +0000 [thread overview] Message-ID: <bug-94617-4-CzOGB1bywd@http.gcc.gnu.org/bugzilla/> (raw) In-Reply-To: <bug-94617-4@http.gcc.gnu.org/bugzilla/> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=94617 --- Comment #10 from Andrew Pinski <pinskia at gcc dot gnu.org> --- For the first function (vanilla_bandpass), GCC 12+ produces now: movq %rcx, %rax cmpl %edx, %edi jg .L2 cmpl %esi, %edx cmovl %r8, %rax .L2: ret For the second the problem is: _3 = ~within_interval_11; # RANGE [irange] long unsigned int [0, 1] NONZERO 0x1 _4 = (long unsigned intD.16) _3; ... low_ptr_13 = _4 * low.0_5; # RANGE [irange] long unsigned int [0, 1] NONZERO 0x1 _6 = (long unsigned intD.16) within_interval_11; ... high_ptr_15 = _6 * high.1_7; ptr_sum_16 = low_ptr_13 + high_ptr_15; We should recongize that ptr_sum_16 is really just within_interval_11 ? high.1_7 : low.0_5; Match pattern for that: ``` (for op (plus bit_ior bit_xor) (simplify (op:c (mult:c (convert @0) @1) (mult:c (convert (bit_not @0)) @2)) (if (INTEGRAL_TYPE_P (TREE_TYPE (@0)) && TYPE_PRECISION (TREE_TYPE (@0)) == 1 && TYPE_UNSIGNED (TREE_TYPE (@0))) (cond @0 @1 @2)) ```
next prev parent reply other threads:[~2023-06-25 22:29 UTC|newest] Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top 2020-04-16 11:28 [Bug tree-optimization/94617] New: " soap at gentoo dot org 2020-04-16 11:57 ` [Bug tree-optimization/94617] " rguenth at gcc dot gnu.org 2020-04-16 12:02 ` soap at gentoo dot org 2020-04-16 12:10 ` rguenth at gcc dot gnu.org 2020-04-16 12:17 ` rguenth at gcc dot gnu.org 2020-04-16 12:18 ` soap at gentoo dot org 2020-04-16 12:47 ` jakub at gcc dot gnu.org 2020-04-16 13:11 ` rguenth at gcc dot gnu.org 2021-07-19 3:40 ` [Bug target/94617] " pinskia at gcc dot gnu.org 2022-11-26 20:43 ` pinskia at gcc dot gnu.org 2023-06-25 22:29 ` pinskia at gcc dot gnu.org [this message] 2023-06-25 22:45 ` pinskia at gcc dot gnu.org
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