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* [Bug c/59822] New: ice in compute_live_loop_exits with -O3
@ 2014-01-15  9:42 dcb314 at hotmail dot com
  2014-01-15 11:40 ` [Bug tree-optimization/59822] [4.9 Regression] " rguenth at gcc dot gnu.org
                   ` (3 more replies)
  0 siblings, 4 replies; 5+ messages in thread
From: dcb314 at hotmail dot com @ 2014-01-15  9:42 UTC (permalink / raw)
  To: gcc-bugs

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=59822

            Bug ID: 59822
           Summary: ice in compute_live_loop_exits with -O3
           Product: gcc
           Version: 4.9.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c
          Assignee: unassigned at gcc dot gnu.org
          Reporter: dcb314 at hotmail dot com

I just tried to bootstrap trunk revision 206619 on an x86_64 Linux box.

Configure line is

../src/trunk/configure --prefix=/home/dcb/gcc/results 
    --enable-checking=yes --enable-languages=c,c++,fortran --disable-werror

In the generated Makefile, I changed BOOT_CFLAGS from
-g -O2 to -g -O3.

I got

../../src/trunk/gcc/config/i386/i386.c: In function ‘rtx_def*
ix86_build_const_vector(machine_mode, bool, rtx)’:
../../src/trunk/gcc/config/i386/i386.c:18746:1: internal compiler error: in
compute_live_loop_exits, at tree-ssa-loop-manip.c:237
 ix86_build_const_vector (enum machine_mode mode, bool vect, rtx value)
 ^
0xe978e5 compute_live_loop_exits
    ../../src/trunk/gcc/tree-ssa-loop-manip.c:237
0xe97cf8 add_exit_phis_var
    ../../src/trunk/gcc/tree-ssa-loop-manip.c:324
0xe97dfc add_exit_phis
    ../../src/trunk/gcc/tree-ssa-loop-manip.c:346
0xe9847b rewrite_into_loop_closed_ssa(bitmap_head*, unsigned int)
    ../../src/trunk/gcc/tree-ssa-loop-manip.c:540
0xf9f9bf vectorize_loops()
    ../../src/trunk/gcc/tree-vectorizer.c:579
0xeac556 tree_loop_vectorize
    ../../src/trunk/gcc/tree-ssa-loop.c:154
0xeac5e0 execute
    ../../src/trunk/gcc/tree-ssa-loop.c:189
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <http://gcc.gnu.org/bugs.html> for instructions.

Interestingly, when I dropped BOOT_CLAGS back to -g -O2, the bootstrap
worked.
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From: "clyon at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/59695] bad code generation on aarch64 in aarch64_output_mi_thunk
Date: Wed, 15 Jan 2014 10:28:00 -0000
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http://gcc.gnu.org/bugzilla/show_bug.cgi?idY695

--- Comment #2 from clyon at gcc dot gnu.org ---
Author: clyon
Date: Wed Jan 15 10:27:55 2014
New Revision: 206628

URL: http://gcc.gnu.org/viewcvs?rev 6628&root=gcc&view=rev
Log:
2014-01-15  Matthew Gretton-Dann  <matthew.gretton-dann@linaro.org>
            Kugan Vivekanandarajah  <kuganv@linaro.org>

    gcc/
    PR target/59695
    * config/aarch64/aarch64.c (aarch64_build_constant): Fix incorrect
    truncation.

    gcc/testsuite/
    PR target/59695
    * g++.dg/pr59695.C: New testcase.


Added:
    trunk/gcc/testsuite/g++.dg/pr59695.C
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/config/aarch64/aarch64.c
    trunk/gcc/testsuite/ChangeLog


^ permalink raw reply	[flat|nested] 5+ messages in thread
end of thread, other threads:[~2014-01-15 15:13 UTC | newest]

Thread overview: 5+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2014-01-15  9:42 [Bug c/59822] New: ice in compute_live_loop_exits with -O3 dcb314 at hotmail dot com
2014-01-15 11:40 ` [Bug tree-optimization/59822] [4.9 Regression] " rguenth at gcc dot gnu.org
2014-01-15 12:17 ` rguenth at gcc dot gnu.org
2014-01-15 15:13 ` rguenth at gcc dot gnu.org
2014-01-15 15:13 ` rguenth at gcc dot gnu.org

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