(reload): When decrement max_groups of superclass, can

only do so if the group_size is smaller than the current group.

From-SVN: r8539

diff --git a/gcc/reload1.c b/gcc/reload1.c
index 2a5db92..13dd43b 100644 (file)
--- a/gcc/reload1.c
+++ b/gcc/reload1.c
@@ -1653,7 +1653,11 @@ reload (first, global, dumpfile)
                          max_groups[class]--;
                          p = reg_class_superclasses[class];
                          while (*p != LIM_REG_CLASSES)
-                           max_groups[(int) *p++]--;
+                           {
+                             if (group_size [(int) *p] <= group_size [class])
+                               max_groups[(int) *p]--;
+                             p++;
+                           }
 
                          /* Indicate both these regs are part of a group.  */
                          SET_HARD_REG_BIT (counted_for_groups, j);
@@ -1768,8 +1772,12 @@ reload (first, global, dumpfile)
                              max_groups[class]--;
                              p = reg_class_superclasses[class];
                              while (*p != LIM_REG_CLASSES)
-                               max_groups[(int) *p++]--;
-
+                               {
+                                 if (group_size [(int) *p]
+                                     <= group_size [class])
+                                   max_groups[(int) *p]--;
+                                 p++;
+                               }
                              break;
                            }
                        }
@@ -2117,7 +2125,11 @@ count_possible_groups (group_size, group_mode, max_groups, class)
            max_groups[class]--;
            p = reg_class_superclasses[class];
            while (*p != LIM_REG_CLASSES)
-             max_groups[(int) *p++]--;
+             {
+               if (group_size [(int) *p] <= group_size [class])
+                 max_groups[(int) *p]--;
+               p++;
+             }
 
            /* Don't count these registers again.  */
            for (j = 0; j < group_size[class]; j++)