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From: "law at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/104987] [12 Regression] Recent change causing vrp13.c regressions on several targets
Date: Sun, 27 Mar 2022 16:52:07 +0000	[thread overview]
Message-ID: <bug-104987-4-Ms2ZAL4twi@http.gcc.gnu.org/bugzilla/> (raw)
In-Reply-To: <bug-104987-4@http.gcc.gnu.org/bugzilla/>

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=104987

Jeffrey A. Law <law at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Target|iq2000-elf, v850e-elf       |iq2000-elf
           Priority|P3                          |P4

--- Comment #8 from Jeffrey A. Law <law at gcc dot gnu.org> ---
V850 simulator fix has been posted to the binutils list.

I've never really hacked the iq2000, but from the looks of things I think it's
mis-compiling mulsi3 in libgcc.  In particular, I don't think it's handling
delay slots properly for the bbi instruction.  reorg has tagged it as a
nullified-if-false branch, but it appears that we're using the wrong form at
assembly time and the instruction in the delay slot always executes.

So P4 as this appears to be an iq2000 specific issue.

  parent reply	other threads:[~2022-03-27 16:52 UTC|newest]

Thread overview: 12+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-03-19 18:12 [Bug tree-optimization/104987] New: " law at gcc dot gnu.org
2022-03-21  8:54 ` [Bug tree-optimization/104987] " rguenth at gcc dot gnu.org
2022-03-21 16:59 ` amacleod at redhat dot com
2022-03-21 17:16 ` law at gcc dot gnu.org
2022-03-21 21:16 ` amacleod at redhat dot com
2022-03-23 16:55 ` jakub at gcc dot gnu.org
2022-03-23 16:59 ` jakub at gcc dot gnu.org
2022-03-26 17:41 ` law at gcc dot gnu.org
2022-03-26 23:34 ` law at gcc dot gnu.org
2022-03-27 16:52 ` law at gcc dot gnu.org [this message]
2022-04-03 22:24 ` [Bug target/104987] " cvs-commit at gcc dot gnu.org
2022-04-03 22:26 ` law at gcc dot gnu.org

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