[Bug c/26412] New: Problem with OpenMP / C

[Bug c/26412] New: Problem with OpenMP / C

[eloranta at jyu dot fi]

The following code causes gcc to crash when openmp is enabled:

bug2.c:

/*
 * This program triggers an openmp bug in gcc 4.2:
Using built-in specs.
Target: powerpc-apple-darwin8.4.0
Configured with: /opt/local/var/db/dports/build/_opt_local_var_db_dports_sour
ces_rsync.rsync.darwinports.org_dpupdate_dports_lang_gcc42/work/gcc-4.2-20060
204/configure --prefix=/opt/local --enable-languages=c,c++,java,objc,fortran 
--libdir=/opt/local/lib/gcc42 --includedir=/opt/local/include/gcc42 --infodir
=/opt/local/share/info --mandir=/opt/local/share/man --with-local-prefix=/opt
/local --with-system-zlib --disable-nls --program-suffix=-dp-4.2 --with-gxx-i
nclude-dir=/opt/local/include/gcc42/c++/ --with-gmp=/opt/local --with-mpfr=/o
pt/local --disable-multilib
Thread model: posix
gcc version 4.2.0 20060204 (experimental)
*
*
* To compile:
*
* gcc -fopenmp -c bug2.c
*
* The resulting error message is:
*
bug2.c: In function 'test':
bug2.c:34: internal compiler error: Bus error
Please submit a full bug report,
with preprocessed source if appropriate.
See <URL:http://gcc.gnu.org/bugs.html> for instructions.
*
* The program compiles without the -fopenmp flag.
*
* The system is MacOS X 10.4.5.
*
* Note: the program does nothing useful (it just for demonstrating the problem)
*
*/

extern double table_h[];
extern int dft_model;

void test() {

  int ri;
  double ph;

#pragma omp parallel for private(ri)
  for (ri = 0; ri < 100; ri++) {
    ph = table_h[dft_model];
  }
}

bug2.i:

# 1 "bug2.c"
# 1 "<built-in>"
# 1 "<command line>"
# 1 "bug2.c"
# 26 "bug2.c"
extern double table_h[];
extern int dft_model;

void test() {

  int ri;
  double ph;

#pragma omp parallel for private(ri)
  for (ri = 0; ri < 100; ri++) {
    ph = table_h[dft_model];
  }
}


-- 
           Summary: Problem with OpenMP / C
           Product: gcc
           Version: 4.2.0
            Status: UNCONFIRMED
          Severity: major
          Priority: P3
         Component: c
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: eloranta at jyu dot fi


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=26412

[Bug middle-end/26412] Problem with OpenMP / C

[pinskia at gcc dot gnu dot org]

------- Comment #1 from pinskia at gcc dot gnu dot org  2006-02-22 13:01 -------
Confirmed, backtrace:
#0  0x00105ff4 in omp_add_variable (ctx=0x429008e0, decl=0x41edae70, flags=5)
at /Users/pinskia/src/gcc/local/gcc/gcc/gimplify.c:4271
#1  0x00105fc0 in omp_add_variable (ctx=0x429008e0, decl=0x41edae70, flags=5)
at /Users/pinskia/src/gcc/local/gcc/gcc/gimplify.c:4253
#2  0x001065fc in omp_notice_variable (ctx=0x578630, decl=0x429008e0,
in_code=108 'l') at /Users/pinskia/src/gcc/local/gcc/gcc/gimplify.c:4390
#3  0x001064dc in omp_notice_variable (ctx=0x578630, decl=0x429008e0,
in_code=108 'l') at /Users/pinskia/src/gcc/local/gcc/gcc/gimplify.c:4411
#4  0x00106704 in gimplify_var_or_parm_decl (expr_p=0x5) at
/Users/pinskia/src/gcc/local/gcc/gcc/gimplify.c:1599
#5  0x001148d4 in gimplify_compound_lval (expr_p=0x41ee0440, pre_p=0xbffff0cc,
post_p=0xbffff0d0, fallback=fb_rvalue) at
/Users/pinskia/src/gcc/local/gcc/gcc/gimplify.c:1660


-- 

pinskia at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Severity|major                       |normal
             Status|UNCONFIRMED                 |NEW
          Component|c                           |middle-end
     Ever Confirmed|0                           |1
           Keywords|                            |ice-on-valid-code, openmp
   Last reconfirmed|0000-00-00 00:00:00         |2006-02-22 13:01:10
               date|                            |


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=26412

[Bug middle-end/26412] Problem with OpenMP / C

[pinskia at gcc dot gnu dot org]

------- Comment #2 from pinskia at gcc dot gnu dot org  2006-02-22 13:59 -------
Also confirmed on x86_64-linux-gnu with the same backtrace.


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=26412

[Bug middle-end/26412] ICE with external arrays using OpenMP

[reichelt at gcc dot gnu dot org]

------- Comment #3 from reichelt at gcc dot gnu dot org  2006-02-22 14:18 -------
Even shorter testcase:

==========================
extern int table[];

void foo()
{
#pragma omp parallel
  table[0];
}
==========================


-- 

reichelt at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |reichelt at gcc dot gnu dot
                   |                            |org
            Summary|Problem with OpenMP / C     |ICE with external arrays
                   |                            |using OpenMP


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=26412

[Bug middle-end/26412] ICE with external arrays using OpenMP

[jakub at gcc dot gnu dot org]

------- Comment #4 from jakub at gcc dot gnu dot org  2006-02-23 18:06 -------
Subject: Bug 26412

Author: jakub
Date: Thu Feb 23 18:06:21 2006
New Revision: 111391

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=111391
Log:
        PR middle-end/26412
        * gimplify.c (omp_add_variable): Guard variable size decl test with
        DECL_SIZE (decl) check.

        * gcc.dg/gomp/pr26412.c: New test.

Added:
    trunk/gcc/testsuite/gcc.dg/gomp/pr26412.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/gimplify.c
    trunk/gcc/testsuite/ChangeLog


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=26412

[Bug middle-end/26412] ICE with external arrays using OpenMP

[jakub at gcc dot gnu dot org]

------- Comment #5 from jakub at gcc dot gnu dot org  2006-02-24 10:26 -------
Fixed on the trunk.


-- 

jakub at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
         AssignedTo|unassigned at gcc dot gnu   |jakub at gcc dot gnu dot org
                   |dot org                     |
             Status|NEW                         |ASSIGNED
   Last reconfirmed|2006-02-22 13:01:10         |2006-02-24 10:26:00
               date|                            |


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=26412

[Bug middle-end/26412] ICE with external arrays using OpenMP

[jakub at gcc dot gnu dot org]

------- Comment #6 from jakub at gcc dot gnu dot org  2006-02-24 10:26 -------
Fixed.


-- 

jakub at gcc dot gnu dot org changed:

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


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=26412

[Bug middle-end/26412] ICE with external arrays using OpenMP

[pinskia at gcc dot gnu dot org]

-- 

pinskia at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
   Target Milestone|---                         |4.2.0


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=26412