[Bug c++/37533] New: ICE with parallel for loop

[Bug c++/37533] New: ICE with parallel for loop

[reichelt at gcc dot gnu dot org]

The following code snippet triggers an ICE since GCC 4.2.0 when compiled
with "-O2 -fopenmp":

======================================
template<int> void foo()
{
#pragma omp parallel for
  for (int i=""; i<4; ++i) ;
}

void bar()
{
  foo<0>();
}
======================================

bug.cc: In function 'void _Z3fooILi0EEvv.omp_fn.0(void*)':
bug.cc:4: internal compiler error: in fold_convert, at fold-const.c:2528
Please submit a full bug report, [etc.]

Without "-fopenmp" the code is rejected:

bug.cc: In function 'void foo() [with int <anonymous> = 0]':
bug.cc:9:   instantiated from here
bug.cc:4: error: invalid conversion from 'const char*' to 'int'


-- 
           Summary: ICE with parallel for loop
           Product: gcc
           Version: 4.4.0
            Status: UNCONFIRMED
          Keywords: ice-on-invalid-code, monitored, openmp
          Severity: normal
          Priority: P3
         Component: c++
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: reichelt at gcc dot gnu dot org


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=37533

[Bug c++/37533] ICE with parallel for loop

[pinskia at gcc dot gnu dot org]

------- Comment #1 from pinskia at gcc dot gnu dot org  2008-09-20 03:06 -------
Well this is an accepts invalid code since it "compiles" at -O0 when it should
not.  The ICE is during scev analysis.


-- 

pinskia at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |NEW
     Ever Confirmed|0                           |1
           Keywords|                            |accepts-invalid
   Last reconfirmed|0000-00-00 00:00:00         |2008-09-20 03:06:23
               date|                            |


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=37533

[Bug c++/37533] ICE with parallel for loop

[jakub at gcc dot gnu dot org]

------- Comment #2 from jakub at gcc dot gnu dot org  2008-09-23 18:58 -------
Subject: Bug 37533

Author: jakub
Date: Tue Sep 23 18:57:18 2008
New Revision: 140613

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=140613
Log:
        PR c++/37533
        * semantics.c (finish_omp_for): If processing_template_decl, just build
        MODIFY_EXPR for init instead of calling cp_build_modify_expr.

        * g++.dg/gomp/pr37533.C: New test.

Added:
    trunk/gcc/testsuite/g++.dg/gomp/pr37533.C
Modified:
    trunk/gcc/cp/ChangeLog
    trunk/gcc/cp/semantics.c
    trunk/gcc/testsuite/ChangeLog


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=37533

[Bug c++/37533] ICE with parallel for loop

[jakub at gcc dot gnu dot org]

------- Comment #3 from jakub at gcc dot gnu dot org  2008-09-23 19:03 -------
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=37533

[Bug c++/37533] ICE with parallel for loop

[jakub at gcc dot gnu dot org]

-- 

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|2008-09-20 03:06:23         |2008-09-23 19:02:45
               date|                            |


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=37533