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From: "rguenth at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/114485] [13/14 Regression] Wrong code with -O3 -march=rv64gcv on riscv or `-O3 -march=armv9-a` for aarch64
Date: Thu, 04 Apr 2024 07:59:06 +0000	[thread overview]
Message-ID: <bug-114485-4-AXS6Er6ZcW@http.gcc.gnu.org/bugzilla/> (raw)
In-Reply-To: <bug-114485-4@http.gcc.gnu.org/bugzilla/>

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=114485

--- Comment #10 from Richard Biener <rguenth at gcc dot gnu.org> ---
  /* Init_expr will be update by vect_update_ivs_after_vectorizer,
     if niters or vf is unkown:
     For shift, when shift mount >= precision, there would be UD.
     For mult, don't known how to generate
     init_expr * pow (step, niters) for variable niters.
     For neg, it should be ok, since niters of vectorized main loop
     will always be multiple of 2.

well, for partial vectors that's of course not true.

  parent reply	other threads:[~2024-04-04  7:59 UTC|newest]

Thread overview: 17+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2024-03-26 14:54 [Bug tree-optimization/114485] New: [14] Wrong code with -O3 -march=rv64gcv on riscv patrick at rivosinc dot com
2024-03-26 20:35 ` [Bug tree-optimization/114485] " pinskia at gcc dot gnu.org
2024-03-26 20:39 ` [Bug tree-optimization/114485] [13/14 Regression] Wrong code with -O3 -march=rv64gcv on riscv or `-O3 -march=armv9-a` for aarch64 pinskia at gcc dot gnu.org
2024-03-27  8:19 ` rguenth at gcc dot gnu.org
2024-03-27  8:19 ` rguenth at gcc dot gnu.org
2024-03-27 14:06 ` rdapp at gcc dot gnu.org
2024-03-27 21:03 ` pinskia at gcc dot gnu.org
2024-03-27 21:04 ` pinskia at gcc dot gnu.org
2024-03-27 21:06 ` pinskia at gcc dot gnu.org
2024-04-03 13:13 ` rguenth at gcc dot gnu.org
2024-04-04  7:52 ` rguenth at gcc dot gnu.org
2024-04-04  7:59 ` rguenth at gcc dot gnu.org [this message]
2024-04-04  8:04 ` rguenth at gcc dot gnu.org
2024-04-04 11:09 ` cvs-commit at gcc dot gnu.org
2024-04-04 11:10 ` [Bug tree-optimization/114485] [13 " rguenth at gcc dot gnu.org
2024-05-03 13:55 ` cvs-commit at gcc dot gnu.org
2024-05-03 13:58 ` rguenth at gcc dot gnu.org

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