[Bug rtl-optimization/59020] New: [4.9 Regression] internal compiler error: in maybe_add_or_update_dep_1, at sched-deps.c:933

[Bug rtl-optimization/59020] New: [4.9 Regression] internal compiler error: in maybe_add_or_update_dep_1, at sched-deps.c:933

[Joost.VandeVondele at mat dot ethz.ch]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=59020

            Bug ID: 59020
           Summary: [4.9 Regression] internal compiler error: in
                    maybe_add_or_update_dep_1, at sched-deps.c:933
           Product: gcc
           Version: 4.9.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: rtl-optimization
          Assignee: unassigned at gcc dot gnu.org
          Reporter: Joost.VandeVondele at mat dot ethz.ch

Created attachment 31172
  --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=31172&action=edit
reduced testcase.

The attached testcase compiled with current trunk fails as

gfortran  -c -O2 -march=native -fmodulo-sched -ffast-math -ffree-form
-fno-inline  bug.f90

bug.f90:98:0: internal compiler error: in maybe_add_or_update_dep_1, at
sched-deps.c:933
   END SUBROUTINE write_forces
 ^
0xf3e498 maybe_add_or_update_dep_1
    ../../gcc/gcc/sched-deps.c:933
0xf3e498 maybe_add_or_update_dep_1
    ../../gcc/gcc/sched-deps.c:928
0xf3e5fc haifa_note_dep
    ../../gcc/gcc/sched-deps.c:1866
0xf35e52 note_dep
    ../../gcc/gcc/sched-deps.c:1901
0xf35e52 add_dependence_1
    ../../gcc/gcc/sched-deps.c:4175
0xf389d1 add_dependence(rtx_def*, rtx_def*, reg_note)
    ../../gcc/gcc/sched-deps.c:1557
0xf3c0f5 chain_to_prev_insn
    ../../gcc/gcc/sched-deps.c:1693
0xf3c0f5 deps_analyze_insn(deps_desc*, rtx_def*)
    ../../gcc/gcc/sched-deps.c:3697
0xf3c6f2 sched_analyze(deps_desc*, rtx_def*, rtx_def*)
    ../../gcc/gcc/sched-deps.c:3739
0x9b1dd5 compute_block_dependences
    ../../gcc/gcc/sched-rgn.c:2721
0x9b1dd5 sched_rgn_compute_dependencies(int)
    ../../gcc/gcc/sched-rgn.c:3234
0x9b4621 schedule_region

This is a recent failure introduced between r204343 and r204377

[Bug rtl-optimization/59020] [4.9 Regression] internal compiler error: in maybe_add_or_update_dep_1, at sched-deps.c:933

[Joost.VandeVondele at mat dot ethz.ch]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=59020

Joost VandeVondele <Joost.VandeVondele at mat dot ethz.ch> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |Joost.VandeVondele at mat dot ethz
                   |                            |.ch

--- Comment #1 from Joost VandeVondele <Joost.VandeVondele at mat dot ethz.ch> ---
output from -v 

> gfortran  -c -O2 -march=native -fmodulo-sched -ffast-math -ffree-form -fno-inline  -v bug.f90
Using built-in specs.
COLLECT_GCC=gfortran
Target: x86_64-unknown-linux-gnu
Configured with: ../gcc/configure --prefix=/data/vjoost/gnu/gcc_trunk/install
--enable-languages=c,c++,fortran --disable-multilib --enable-plugins
--enable-lto --disable-bootstrap
Thread model: posix
gcc version 4.9.0 20131106 (experimental) [trunk revision 204433] (GCC) 
COLLECT_GCC_OPTIONS='-c' '-O2' '-march=native' '-fmodulo-sched' '-ffast-math'
'-ffree-form' '-fno-inline' '-v'

/data/vjoost/gnu/gcc_trunk/install/libexec/gcc/x86_64-unknown-linux-gnu/4.9.0/f951
bug.f90 -march=corei7 -mmmx -mno-3dnow -msse -msse2 -msse3 -mssse3 -mno-sse4a
-mcx16 -msahf -mno-movbe -mno-aes -mno-pclmul -mpopcnt -mno-abm -mno-lwp
-mno-fma -mno-fma4 -mno-xop -mno-bmi -mno-bmi2 -mno-tbm -mno-avx -mno-avx2
-msse4.2 -msse4.1 -mno-lzcnt -mno-rtm -mno-hle -mno-rdrnd -mno-f16c
-mno-fsgsbase -mno-rdseed -mno-prfchw -mno-adx -mfxsr -mno-xsave -mno-xsaveopt
-mno-avx512f -mno-avx512er -mno-avx512cd -mno-avx512pf --param l1-cache-size=32
--param l1-cache-line-size=64 --param l2-cache-size=24576 -mtune=corei7 -quiet
-dumpbase bug.f90 -auxbase bug -O2 -version -fmodulo-sched -ffast-math
-ffree-form -fno-inline -fintrinsic-modules-path
/data/vjoost/gnu/gcc_trunk/install/lib/gcc/x86_64-unknown-linux-gnu/4.9.0/finclude
-o /tmp/ccJiZWVg.s
GNU Fortran (GCC) version 4.9.0 20131106 (experimental) [trunk revision 204433]
(x86_64-unknown-linux-gnu)
    compiled by GNU C version 4.7.2 20120816 (prerelease) [gcc-4_7-branch
revision 190437], GMP version 4.3.2, MPFR version 2.4.2, MPC version 0.8.1
GGC heuristics: --param ggc-min-expand=30 --param ggc-min-heapsize=4096
GNU Fortran (GCC) version 4.9.0 20131106 (experimental) [trunk revision 204433]
(x86_64-unknown-linux-gnu)
    compiled by GNU C version 4.7.2 20120816 (prerelease) [gcc-4_7-branch
revision 190437], GMP version 4.3.2, MPFR version 2.4.2, MPC version 0.8.1
GGC heuristics: --param ggc-min-expand=30 --param ggc-min-heapsize=4096
bug.f90: In function ‘write_forces’:
bug.f90:98:0: internal compiler error: in maybe_add_or_update_dep_1, at
sched-deps.c:933
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From: "mpolacek at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/59014] [4.9 Regression] wrong code at -Os and above on x86_64-linux-gnu
Date: Wed, 06 Nov 2013 11:13:00 -0000
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http://gcc.gnu.org/bugzilla/show_bug.cgi?idY014

--- Comment #3 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
And, it's not related to -Os; the bug triggers exactly when VRP is run.

[Bug rtl-optimization/59020] [4.9 Regression] internal compiler error: in maybe_add_or_update_dep_1, at sched-deps.c:933

[rguenth at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=59020

Richard Biener <rguenth at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Target|                            |x86_64-*-*
   Target Milestone|---                         |4.9.0

[Bug rtl-optimization/59020] [4.9 Regression] internal compiler error: in maybe_add_or_update_dep_1, at sched-deps.c:933

[rguenth at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=59020

Richard Biener <rguenth at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Priority|P3                          |P1
             Status|UNCONFIRMED                 |NEW
   Last reconfirmed|                            |2013-11-19
      Known to work|                            |4.8.2
     Ever confirmed|0                           |1

--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
Confirmed with -O2 -fmodulo-sched -fno-inline -march=corei7.

[Bug rtl-optimization/59020] [4.9 Regression] internal compiler error: in maybe_add_or_update_dep_1, at sched-deps.c:933

[antoine.balestrat at gmail dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=59020

Antoine Balestrat <antoine.balestrat at gmail dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |antoine.balestrat at gmail dot com

--- Comment #3 from Antoine Balestrat <antoine.balestrat at gmail dot com> ---
I've got a short C testcase if this is of any help.

$ cat fail.c
int a, b, d;
unsigned c;

void f()
{
  unsigned q;
  for(; a; a++)
    if(((c %= d && 1) ? : 1) & 1)
      for(; b; q++);
}

$ xgcc -w -march=native -O2 -fmodulo-sched fail.c 
fail.c: In function 'f':
fail.c:10:1: internal compiler error: in maybe_add_or_update_dep_1, at
sched-deps.c:933
 }
 ^
Please submit a full bug report,
with preprocessed source if appropriate.
See <http://gcc.gnu.org/bugs.html> for instructions.


Using gcc 4.9 as of 20131123.

[Bug rtl-optimization/59020] [4.9 Regression] internal compiler error: in maybe_add_or_update_dep_1, at sched-deps.c:933

[hjl.tools at gmail dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=59020

H.J. Lu <hjl.tools at gmail dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |wmi at google dot com

--- Comment #4 from H.J. Lu <hjl.tools at gmail dot com> ---
It is caused by r204369.

[Bug rtl-optimization/59020] [4.9 Regression] internal compiler error: in maybe_add_or_update_dep_1, at sched-deps.c:933

[wmi at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=59020

--- Comment #5 from wmi at gcc dot gnu.org ---
Author: wmi
Date: Tue Dec  3 18:35:24 2013
New Revision: 205644

URL: http://gcc.gnu.org/viewcvs?rev=205644&root=gcc&view=rev
Log:
2013-12-03  Wei Mi  <wmi@google.com>

    PR rtl-optimization/59020
    * sched-deps.c (try_group_insn): Move it from haifa-sched.c to here.
    (sched_analyze_insn): Call try_group_insn.
    (sched_analyze): Cleanup SCHED_GROUP_P before start the analysis.
    * haifa-sched.c (try_group_insn): Moved to sched-deps.c.
    (group_insns_for_macro_fusion): Removed.
    (sched_init): Remove calling group_insns_for_macro_fusion.

2013-12-03  Wei Mi  <wmi@google.com>

    PR rtl-optimization/59020
    * testsuite/gcc.dg/pr59020.c: New.
    * testsuite/gcc.dg/macro-fusion-1.c: New.
    * testsuite/gcc.dg/macro-fusion-2.c: New.

Added:
    trunk/gcc/testsuite/gcc.dg/macro-fusion-1.c
    trunk/gcc/testsuite/gcc.dg/macro-fusion-2.c
    trunk/gcc/testsuite/gcc.dg/pr59020.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/haifa-sched.c
    trunk/gcc/sched-deps.c
    trunk/gcc/testsuite/ChangeLog

[Bug rtl-optimization/59020] [4.9 Regression] internal compiler error: in maybe_add_or_update_dep_1, at sched-deps.c:933

[Joost.VandeVondele at mat dot ethz.ch]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=59020

Joost VandeVondele <Joost.VandeVondele at mat dot ethz.ch> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
         Resolution|---                         |FIXED

--- Comment #6 from Joost VandeVondele <Joost.VandeVondele at mat dot ethz.ch> ---
The original testcase seems fixed indeed.