[committed] Fix invalid GOMP_loop_static_start call (PR middle-end/52230)

[Jakub Jelinek]

Hi!

If omp for loop body doesn't fallthru (which doesn't make much sense),
then we would call GOMP_loop_static_start with wrong number of arguments
if collapse is 1, static scheduling without chunk size and no ordered
clause.

Fixed thusly, bootstrapped/regtested on x86_64-linux and i686-linux,
committed to trunk.

2012-02-13  Jakub Jelinek  <ja...@redhat.com>

        PR middle-end/52230
        * omp-low.c (expand_omp_for): If a static schedule without
        chunk size has NULL region->cont, force fd.chunk_size to be
        integer_zero_node.

--- gcc/omp-low.c.jj    2012-01-13 21:47:35.000000000 +0100
+++ gcc/omp-low.c       2012-02-13 12:54:55.137590443 +0100
@@ -4664,6 +4664,9 @@ expand_omp_for (struct omp_region *regio
     {
       int fn_index, start_ix, next_ix;
 
+      if (fd.chunk_size == NULL
+         && fd.sched_kind == OMP_CLAUSE_SCHEDULE_STATIC)
+       fd.chunk_size = integer_zero_node;
       gcc_assert (fd.sched_kind != OMP_CLAUSE_SCHEDULE_AUTO);
       fn_index = (fd.sched_kind == OMP_CLAUSE_SCHEDULE_RUNTIME)
                  ? 3 : fd.sched_kind;

        Jakub