[Bug middle-end/66352] New: [6 Regression] ICE in in dfs_enumerate_from, at cfganal.c:1195

[Bug middle-end/66352] New: [6 Regression] ICE in in dfs_enumerate_from, at cfganal.c:1195

[Joost.VandeVondele at mat dot ethz.ch]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66352

            Bug ID: 66352
           Summary: [6 Regression] ICE in in dfs_enumerate_from, at
                    cfganal.c:1195
           Product: gcc
           Version: 6.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: middle-end
          Assignee: unassigned at gcc dot gnu.org
          Reporter: Joost.VandeVondele at mat dot ethz.ch
  Target Milestone: ---

Recent (last few days) regression :

> cat bug.f90
  SUBROUTINE matmul_test ( ntim,len)
    INTEGER, PARAMETER :: dp=8
    REAL(KIND=dp), ALLOCATABLE, DIMENSION(:, :) :: ma, mb, mc
    INTEGER :: siz,len, ntim
    DO i = 5, siz, 2
       len = 2**i + 1
       ALLOCATE ( ma ( len, len ), STAT = ierr )
       IF ( ierr /= 0 ) EXIT
       ALLOCATE ( mb ( len, len ), STAT = ierr )
       IF ( ierr /= 0 ) EXIT
       ALLOCATE ( mc ( len, len ), STAT = ierr )
       IF ( ierr /= 0 ) EXIT
       DO j = 1, ntim
          mc = MATMUL ( ma, mb )
       END DO
    END DO
  END SUBROUTINE matmul_test

> gfortran -c -fprofile-generate -O3 bug.f90
bug.f90:1:0:

   SUBROUTINE matmul_test ( ntim,len)
^
internal compiler error: in dfs_enumerate_from, at cfganal.c:1195
0x75b65d dfs_enumerate_from(basic_block_def*, int, bool (*)(basic_block_def
const*, void const*), basic_block_def**, int, void const*)
        ../../gcc/gcc/cfganal.c:1195
0xd93996 determine_bb_domination_status
        ../../gcc/gcc/tree-ssa-threadupdate.c:1769
0xd93996 thread_through_loop_header
        ../../gcc/gcc/tree-ssa-threadupdate.c:1953
0xd9549c thread_through_all_blocks(bool)
        ../../gcc/gcc/tree-ssa-threadupdate.c:2667
0xcc667b execute
        ../../gcc/gcc/tree-ssa-dom.c:1244
Please submit a full bug report,


gcc version 6.0.0 20150531 (experimental) [trunk revision 223896] (GCC)

[Bug middle-end/66352] [6 Regression] ICE in in dfs_enumerate_from, at cfganal.c:1195

[Joost.VandeVondele at mat dot ethz.ch]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66352

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

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |Joost.VandeVondele at mat dot ethz
                   |                            |.ch, rguenth at gcc dot gnu.org

--- Comment #1 from Joost VandeVondele <Joost.VandeVondele at mat dot ethz.ch> ---
happened between -r 223856:223882, I'm guessing r223861

[Bug middle-end/66352] [6 Regression] ICE in in dfs_enumerate_from, at cfganal.c:1195

[Joost.VandeVondele at mat dot ethz.ch]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66352

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

           What    |Removed                     |Added
----------------------------------------------------------------------------
         Depends on|                            |66340

--- Comment #2 from Joost VandeVondele <Joost.VandeVondele at mat dot ethz.ch> ---
probably a dup of PR66340, but the testcase here is better.


Referenced Bugs:

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66340
[Bug 66340] [6 Regression] profiledbootstrap failure on x86-64 with LTO

[Bug middle-end/66352] [6 Regression] ICE in in dfs_enumerate_from, at cfganal.c:1195

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66352

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

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |ASSIGNED
   Last reconfirmed|                            |2015-06-01
   Target Milestone|---                         |6.0
     Ever confirmed|0                           |1

--- Comment #3 from Richard Biener <rguenth at gcc dot gnu.org> ---
Mine.

[Bug middle-end/66352] [6 Regression] ICE in in dfs_enumerate_from, at cfganal.c:1195

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66352

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

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

--- Comment #4 from Richard Biener <rguenth at gcc dot gnu.org> ---
Patch reverted.

[Bug middle-end/66352] [6 Regression] ICE in in dfs_enumerate_from, at cfganal.c:1195

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66352

--- Comment #5 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Mon Jun  1 13:58:50 2015
New Revision: 223980

URL: https://gcc.gnu.org/viewcvs?rev=223980&root=gcc&view=rev
Log:
2015-06-01  Richard Biener  <rguenther@suse.de>

        PR tree-optimization/66349
        PR tree-optimization/66352
        PR tree-optimization/66357
        * gcc.dg/torture/pr66357.c: New testcase.
        * gcc.dg/torture/pr66349.c: Likewise.
        * gfortran.fortran-torture/compile/pr66352.f90: Likewise.

Added:
    trunk/gcc/testsuite/gcc.dg/torture/pr66349.c
    trunk/gcc/testsuite/gcc.dg/torture/pr66357.c
    trunk/gcc/testsuite/gfortran.fortran-torture/compile/pr66352.f90
Modified:
    trunk/gcc/testsuite/ChangeLog

[Bug middle-end/66352] [6 Regression] ICE in in dfs_enumerate_from, at cfganal.c:1195

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66352
Bug 66352 depends on bug 66340, which changed state.

Bug 66340 Summary: [6 Regression] profiledbootstrap failure on x86-64 with LTO
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66340

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