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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/103226] New: [12 Regression] Recent change to copy-headers causes execution failure for gcc.dg/torture/pr80974 Date: Sat, 13 Nov 2021 20:39:16 +0000 [thread overview] Message-ID: <bug-103226-4@http.gcc.gnu.org/bugzilla/> (raw) https://gcc.gnu.org/bugzilla/show_bug.cgi?id=103226 Bug ID: 103226 Summary: [12 Regression] Recent change to copy-headers causes execution failure for gcc.dg/torture/pr80974 Product: gcc Version: 12.0 Status: UNCONFIRMED Severity: normal Priority: P3 Component: tree-optimization Assignee: unassigned at gcc dot gnu.org Reporter: law at gcc dot gnu.org Target Milestone: --- This change: commit e82c382971664d6fd138cc36020db4b1a91885c6 Author: Aldy Hernandez <aldyh@redhat.com> Date: Wed Nov 10 13:21:59 2021 +0100 Allow loop header copying when first iteration condition is known. Causes gcc.dg/torture/pr80974.c to fail with -O2 on bfin-elf I haven't debugged it in any significant way other than bisection to the above change and quickly looking at the before/after dumps. Things diverge at the .ch2 dump (no surprise there). You may ultimately have to set up a cross environment to debug this one. The one other tidbit, before this change, the test finishes relatively fast, afterwards it takes a LOT longer. Maybe we're wrapping a loop or something like that. Dunno. It may ultimately not be relevant. Oh, if you end up doing a binutils, gcc & newlib build and want to test things yourself using dejagnu you might need a suitable baseboards file. Here's mine, which was copied and edited from some other port... # Copyright (C) 1997-2016 Free Software Foundation, Inc. # # This file is part of DejaGnu. # # DejaGnu is free software; you can redistribute it and/or modify it # under the terms of the GNU General Public License as published by # the Free Software Foundation; either version 3 of the License, or # (at your option) any later version. # # DejaGnu is distributed in the hope that it will be useful, but # WITHOUT ANY WARRANTY; without even the implied warranty of # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU # General Public License for more details. # # You should have received a copy of the GNU General Public License # along with DejaGnu; if not, write to the Free Software Foundation, # Inc., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA. # This is a list of toolchains that are supported on this board. set_board_info target_install {bfin-elf} # Load the generic configuration for this board. This will define a basic set # of routines needed by the tool to communicate with the board. load_generic_config "sim" # basic-sim.exp is a basic description for the standard Cygnus simulator. load_base_board_description "basic-sim" # "fr30" is the name of the sim subdir. setup_sim bfin # No multilib options needed by default. process_multilib_options "" # We only support newlib on this target. We assume that all multilib # options have been specified before we get here. set_board_info compiler "[find_gcc]" set_board_info cflags "[libgloss_include_flags] [newlib_include_flags]" set_board_info ldflags "-msim [libgloss_link_flags] [newlib_link_flags]" # No linker script needed. set_board_info ldscript "" # The simulator doesn't return exit statuses and we need to indicate this; # the standard GCC wrapper will work with this target. set_board_info needs_status_wrapper 1 # Doesn't pass arguments or signals, can't return results, and doesn't # do inferiorio. set_board_info noargs 1 set_board_info gdb,nosignals 1 set_board_info gdb,noresults 1 set_board_info gdb,noinferiorio 1 set_board_info gcc,stack_size 4096
next reply other threads:[~2021-11-13 20:39 UTC|newest] Thread overview: 25+ messages / expand[flat|nested] mbox.gz Atom feed top 2021-11-13 20:39 law at gcc dot gnu.org [this message] 2021-11-14 10:59 ` [Bug tree-optimization/103226] " aldyh at gcc dot gnu.org 2021-11-15 9:03 ` rguenth at gcc dot gnu.org 2021-11-16 2:30 ` law at gcc dot gnu.org 2021-11-17 11:14 ` aldyh at gcc dot gnu.org 2021-11-17 11:32 ` aldyh at gcc dot gnu.org 2021-11-17 15:00 ` tnfchris at gcc dot gnu.org 2021-11-17 15:02 ` tnfchris at gcc dot gnu.org 2021-11-17 15:53 ` aldyh at gcc dot gnu.org 2021-11-17 16:09 ` tnfchris at gcc dot gnu.org 2021-11-17 16:28 ` law at gcc dot gnu.org 2021-11-17 16:29 ` law at gcc dot gnu.org 2021-11-17 16:31 ` aldyh at gcc dot gnu.org 2021-11-17 17:18 ` aldyh at gcc dot gnu.org 2021-11-17 17:54 ` tnfchris at gcc dot gnu.org 2021-11-17 18:31 ` law at gcc dot gnu.org 2021-11-17 18:43 ` aldyh at gcc dot gnu.org 2021-11-17 19:26 ` aldyh at gcc dot gnu.org 2021-11-17 20:02 ` aldyh at gcc dot gnu.org 2021-11-18 13:28 ` aldyh at gcc dot gnu.org 2021-11-20 7:10 ` law at gcc dot gnu.org 2021-11-20 7:23 ` aldyh at gcc dot gnu.org 2021-11-20 16:30 ` cvs-commit at gcc dot gnu.org 2021-11-20 16:31 ` law at gcc dot gnu.org 2021-12-02 14:55 ` hp at gcc dot gnu.org
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