[Bug tree-optimization/31280] New: segfault in remove_referenced_var

[Bug tree-optimization/31280] New: segfault in remove_referenced_var

[pthaugen at us dot ibm dot com]

Seeing the following with mainline using -O2 -ftree-loop-linear when
building galgel benchmark from cpu2000.

I couldn't whittle down to a single testcase so will attatch both source files.

178.galgel/run> /home/pthaugen/install/gcc/trunk/bin/gfortran -c -m64
-ffixed-form -O2 -ftree-loop-linear modules.f90
178.galgel/run> /home/pthaugen/install/gcc/trunk/bin/gfortran -c -m64
-ffixed-form -O2 -ftree-loop-linear sysnsL.f90
sysnsL.f90: In function #sysnsl#:
sysnsL.f90:6: internal compiler error: Segmentation fault
Please submit a full bug report,
with preprocessed source if appropriate.
See <URL:http://gcc.gnu.org/bugs.html> for instructions.

(gdb) run
Starting program:
/home/pthaugen/install/gcc/trunk/libexec/gcc/powerpc64-linux/4.3.0/f951
sysnsL.f90 -quiet -dumpbase sysnsL.f90 -m64 -auxbase sysnsL -O2 -version
-ffixed-form -ftree-loop-linear -fintrinsic-modules-path
/home/pthaugen/install/gcc/trunk/lib/gcc/powerpc64-linux/4.3.0/finclude -o
sysnsL.s
GNU F95 version 4.3.0 20070314 (experimental) (powerpc64-linux)
        compiled by GNU C version 4.1.0 (SUSE Linux).
GGC heuristics: --param ggc-min-expand=30 --param ggc-min-heapsize=4096

Program received signal SIGSEGV, Segmentation fault.
remove_referenced_var (var=<value optimized out>)
    at /home/pthaugen/src/gcc/trunk/gcc/gcc/tree-dfa.c:771
771       ggc_free (*loc);
(gdb) bt 5
#0  remove_referenced_var (var=<value optimized out>)
    at /home/pthaugen/src/gcc/trunk/gcc/gcc/tree-dfa.c:771
#1  0x103d1238 in remove_unused_locals ()
    at /home/pthaugen/src/gcc/trunk/gcc/gcc/tree-ssa-live.c:518
#2  0x1026f204 in execute_function_todo (data=<value optimized out>)
    at /home/pthaugen/src/gcc/trunk/gcc/gcc/passes.c:865
#3  0x1026ee44 in do_per_function (callback=0x1026efe0 <execute_function_todo>,
data=0x21)
    at /home/pthaugen/src/gcc/trunk/gcc/gcc/passes.c:757
#4  0x1026ef4c in execute_todo (flags=33) at
/home/pthaugen/src/gcc/trunk/gcc/gcc/passes.c:935
(More stack frames follow...)


-- 
           Summary: segfault in remove_referenced_var
           Product: gcc
           Version: 4.3.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: tree-optimization
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: pthaugen at us dot ibm dot com
 GCC build triplet: powerpc64-linux
  GCC host triplet: powerpc64-linux
GCC target triplet: powerpc64-linux


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=31280

[Bug tree-optimization/31280] segfault in remove_referenced_var

[pthaugen at us dot ibm dot com]

------- Comment #1 from pthaugen at us dot ibm dot com  2007-03-20 15:53 -------
Having trouble attatching source files, will keep trying...


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=31280

[Bug tree-optimization/31280] segfault in remove_referenced_var

[pinskia at gcc dot gnu dot org]

------- Comment #2 from pinskia at gcc dot gnu dot org  2007-03-20 17:34 -------
You can just send them to me if you want.


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=31280

[Bug tree-optimization/31280] segfault in remove_referenced_var

[pthaugen at us dot ibm dot com]

------- Comment #3 from pthaugen at us dot ibm dot com  2007-03-20 18:09 -------
Created an attachment (id=13238)
 --> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=13238&action=view)
Fortran source


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=31280

[Bug tree-optimization/31280] segfault in remove_referenced_var

[pthaugen at us dot ibm dot com]

------- Comment #4 from pthaugen at us dot ibm dot com  2007-03-20 18:10 -------
Created an attachment (id=13239)
 --> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=13239&action=view)
Fortran source


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=31280

[Bug tree-optimization/31280] segfault in remove_referenced_var

[pinskia at gcc dot gnu dot org]

------- Comment #5 from pinskia at gcc dot gnu dot org  2007-03-29 01:41 -------
Reduced self contained testcase:
        Module NsLin
          Real*8, Dimension(54,54) :: VXX, VXY,
     &      VYX, VYY, VXX2, VXY2, VYX2, VYY2
        End Module NsLin
      Subroutine  SysNSL (N, NX, NY)
        Use NsLin
         Implicit  Real*8 (A-H,O-Z)
         Real*8, Dimension(1000,1000) :: EnsLap, EnsArh
         Real*8, Dimension(1000,1000) ::  EnsTim, HtTim
         Integer, Allocatable, Dimension(:) :: IPIV
         Allocate ( IPIV(N), stat=jerr )
         Do L=1,NX
          Do M=1,NY
           Do i=1,NX
            Do j=1,NY
               EnsTim(NY+ M, NY+ j ) =
     &             ( VXX(i,L)* VXY(j,M) + VYX(i,L)* VYY(j,M) )
     &             * W
               EnsLap(NY*(L-1) + M,NY*(i-1) + j ) =
     &              (VXX(i,L) * VXY2(j,M)   + VYX(i,L) * VYY2(j,M) )
     &            * W
     &            + (VXX2(i,L) *  VXY(j,M) + VYX2(i,L) * VYY(j,M)  )
     &            / W
            End Do
           End Do
          End Do
         End Do
         Call    Dgetrf (EnsTim(1:N,1:N), info)
         If (info .NE. 0) then
           Write (*,*) 'sysnsL(Dgetrf): info=',info
           Stop
         End If
         Call     Dgetri ( EnsTim(1:N,1:N),  IPIV,    info)
         If (info .NE. 0) then
           Stop
         End If
         EnsLap(1:N,1:N) = MATMUL( EnsTim(1:N,1:N), EnsLap(1:N,1:N) )
         Deallocate ( IPIV, stat=jerr)
       Return
      End


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=31280

[Bug tree-optimization/31280] segfault in remove_referenced_var

[spop at gcc dot gnu dot org]

------- Comment #6 from spop at gcc dot gnu dot org  2007-06-22 08:40 -------
I cannot reproduce the ICE on trunk at 125915, on i686-linux


-- 

spop at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |spop at gcc dot gnu dot org


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=31280

[Bug tree-optimization/31280] [4.3 Regression] segfault in remove_referenced_var

[pinskia at gcc dot gnu dot org]

------- Comment #7 from pinskia at gcc dot gnu dot org  2009-01-02 05:53 -------
Fixed a long time ago


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pinskia at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |RESOLVED
           Keywords|                            |ice-on-valid-code
         Resolution|                            |FIXED
            Summary|segfault in                 |[4.3 Regression] segfault in
                   |remove_referenced_var       |remove_referenced_var
   Target Milestone|---                         |4.3.0


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=31280