[Bug fortran/44235] array temporary with high upper bound

[dominiq at lps dot ens dot fr]

------- Comment #2 from dominiq at lps dot ens dot fr  2010-07-01 20:23 -------
Lightly tested patch that does not create temporaries for the test in comment
#1


--- ../_clean/gcc/fortran/dependency.c  2010-06-21 17:31:37.000000000 +0200
+++ gcc/fortran/dependency.c    2010-07-01 22:16:51.000000000 +0200
@@ -1037,8 +1037,9 @@ gfc_check_section_vs_section (gfc_ref *l

   /* Check for forward dependencies x:y vs. x+1:z.  */
   if (l_dir == 1 && r_dir == 1
-      && l_start && r_start && gfc_dep_compare_expr (l_start, r_start) == -1
-      && l_end && r_end && gfc_dep_compare_expr (l_end, r_end) == -1)
+      && l_start && r_start && (gfc_dep_compare_expr (l_start, r_start) == 0
+                            || gfc_dep_compare_expr (l_start, r_start) == -1)
+      /* && l_end && r_end && gfc_dep_compare_expr (l_end, r_end) == -1 */)
     {
       /* Check that the strides are the same.  */
       if (!l_stride && !r_stride)
@@ -1050,8 +1051,9 @@ gfc_check_section_vs_section (gfc_ref *l

   /* Check for forward dependencies x:y:-1 vs. x-1:z:-1.  */
   if (l_dir == -1 && r_dir == -1
-      && l_start && r_start && gfc_dep_compare_expr (l_start, r_start) == 1
-      && l_end && r_end && gfc_dep_compare_expr (l_end, r_end) == 1)
+      && l_start && r_start && (gfc_dep_compare_expr (l_start, r_start) == 0
+                             || gfc_dep_compare_expr (l_start, r_start) == 1)
+      /* && l_end && r_end && gfc_dep_compare_expr (l_end, r_end) == 1 */)
     {
       /* Check that the strides are the same.  */
       if (!l_stride && !r_stride)


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=44235