diff options
Diffstat (limited to 'gcc/fortran/frontend-passes.c')
| -rw-r--r-- | gcc/fortran/frontend-passes.c | 15 |
1 files changed, 12 insertions, 3 deletions
diff --git a/gcc/fortran/frontend-passes.c b/gcc/fortran/frontend-passes.c index 08503ea5d1d..e6786635788 100644 --- a/gcc/fortran/frontend-passes.c +++ b/gcc/fortran/frontend-passes.c @@ -2580,6 +2580,7 @@ do_subscript (gfc_expr **e) bool have_do_start, have_do_end; bool error_not_proven; int warn; + int sgn; dl = lp->c; if (dl == NULL) @@ -2608,7 +2609,16 @@ do_subscript (gfc_expr **e) Do not warn in this case. */ if (dl->ext.iterator->step->expr_type == EXPR_CONSTANT) - mpz_init_set (do_step, dl->ext.iterator->step->value.integer); + { + sgn = mpz_cmp_ui (dl->ext.iterator->step->value.integer, 0); + /* This can happen, but then the error has been + reported previusly. */ + if (sgn == 0) + continue; + + mpz_init_set (do_step, dl->ext.iterator->step->value.integer); + } + else continue; @@ -2634,9 +2644,8 @@ do_subscript (gfc_expr **e) /* No warning inside a zero-trip loop. */ if (have_do_start && have_do_end) { - int sgn, cmp; + int cmp; - sgn = mpz_cmp_ui (do_step, 0); cmp = mpz_cmp (do_end, do_start); if ((sgn > 0 && cmp < 0) || (sgn < 0 && cmp > 0)) break; |