[Bug target/37633] [4.4 Regression] wrong register use on sh64

[kkojima at gcc dot gnu dot org]

------- Comment #1 from kkojima at gcc dot gnu dot org  2008-09-26 03:31 -------
I've tried

--- ORIG/trunk/gcc/ira-color.c  Wed Sep 17 09:48:49 2008
+++ LOCAL/trunk/gcc/ira-color.c Thu Sep 25 12:09:30 2008
@@ -514,7 +514,9 @@ assign_hard_reg (ira_allocno_t allocno, 
 #endif
       if (! ira_hard_reg_not_in_set_p (hard_regno, mode, conflicting_regs)
          || TEST_HARD_REG_BIT (prohibited_class_mode_regs[cover_class][mode],
-                               hard_regno))
+                               hard_regno)
+         || (ALLOCNO_CALLS_CROSSED_NUM (allocno) != 0
+             && HARD_REGNO_CALL_PART_CLOBBERED (hard_regno, mode)))
        continue;
       cost = costs[i];
       full_cost = full_costs[i];
@@ -3064,7 +3066,9 @@ ira_fast_allocation (void)
 #endif
          if (!ira_hard_reg_not_in_set_p (hard_regno, mode, conflict_hard_regs)
              || (TEST_HARD_REG_BIT
-                 (prohibited_class_mode_regs[cover_class][mode], hard_regno)))
+                 (prohibited_class_mode_regs[cover_class][mode], hard_regno))
+             || (ALLOCNO_CALLS_CROSSED_NUM (a) != 0
+                 && HARD_REGNO_CALL_PART_CLOBBERED (hard_regno, mode)))
            continue;
          ALLOCNO_HARD_REGNO (a) = hard_regno;
          for (r = ALLOCNO_LIVE_RANGES (a); r != NULL; r = r->next)


It works for me, though it could be completely wrong.


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=37633