re PR target/48380 (ICE in postreload.c while building trunk)

2011-04-01  Vladimir Makarov  <vmakarov@redhat.com>

	PR target/48380
	* ira.c (ira): Call grow_reg_equivs when fix_reg_equiv_init is
          not called.

	* ira-emit.c (emit_move_list): Update reg equiv init insn list.

From-SVN: r171951

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index fce10f95a7d567e2936094bec8177838bde733ce..659ea8355cf92d2d7d90d7cfdfa71a14e319a9ce 100644 (file)
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,11 @@
+2011-04-01  Vladimir Makarov  <vmakarov@redhat.com>
+
+       PR target/48380
+       * ira.c (ira): Call grow_reg_equivs when fix_reg_equiv_init is
+          not called.
+
+       * ira-emit.c (emit_move_list): Update reg equiv init insn list.
+
 2011-04-04  Steven Bosscher  <steven@gcc.gnu.org>
 
        * cprop.c (struct expr): Split 'expr' field in 'dest' and 'src'.

diff --git a/gcc/ira-emit.c b/gcc/ira-emit.c
index 4b5068ec8b7d71fda530d54bf9acf81350e98ba8..0219342d4c50f9be882c9f26db6584c8b3eb63b9 100644 (file)
--- a/gcc/ira-emit.c
+++ b/gcc/ira-emit.c
@@ -900,8 +900,8 @@ modify_move_list (move_t list)
 static rtx
 emit_move_list (move_t list, int freq)
 {
-  int cost;
-  rtx result, insn;
+  int cost, regno;
+  rtx result, insn, set, to;
   enum machine_mode mode;
   enum reg_class aclass;
 
@@ -913,12 +913,34 @@ emit_move_list (move_t list, int freq)
                      allocno_emit_reg (list->from));
       list->insn = get_insns ();
       end_sequence ();
-      /* The reload needs to have set up insn codes.  If the reload
-        sets up insn codes by itself, it may fail because insns will
-        have hard registers instead of pseudos and there may be no
-        machine insn with given hard registers.  */
       for (insn = list->insn; insn != NULL_RTX; insn = NEXT_INSN (insn))
-       recog_memoized (insn);
+       {
+         /* The reload needs to have set up insn codes.  If the
+            reload sets up insn codes by itself, it may fail because
+            insns will have hard registers instead of pseudos and
+            there may be no machine insn with given hard
+            registers.  */
+         recog_memoized (insn);
+         /* Add insn to equiv init insn list if it is necessary.
+            Otherwise reload will not remove this insn if it decides
+            to use the equivalence.  */
+         if ((set = single_set (insn)) != NULL_RTX)
+           {
+             to = SET_DEST (set);
+             if (GET_CODE (to) == SUBREG)
+               to = SUBREG_REG (to);
+             ira_assert (REG_P (to));
+             regno = REGNO (to);
+             if (regno >= ira_reg_equiv_len
+                 || (! ira_reg_equiv_invariant_p[regno]
+                     && ira_reg_equiv_const[regno] == NULL_RTX))
+               continue; /* regno has no equivalence.  */
+             ira_assert ((int) VEC_length (reg_equivs_t, reg_equivs)
+                         >= ira_reg_equiv_len);
+             reg_equiv_init (regno)
+               = gen_rtx_INSN_LIST (VOIDmode, insn, reg_equiv_init (regno));
+           }
+       }
       emit_insn (list->insn);
       mode = ALLOCNO_MODE (list->to);
       aclass = ALLOCNO_CLASS (list->to);

diff --git a/gcc/ira.c b/gcc/ira.c
index 0e0d0beda60d893699d23f952b404c304901fc29..79deab6344ddf84a15654015bcba774abbc09e78 100644 (file)
--- a/gcc/ira.c
+++ b/gcc/ira.c
@@ -3657,8 +3657,6 @@ ira (FILE *f)
   if (delete_trivially_dead_insns (get_insns (), max_reg_num ()))
     df_analyze ();
 
-  grow_reg_equivs ();
-
   if (max_regno != max_regno_before_ira)
     {
       regstat_free_n_sets_and_refs ();
@@ -3667,10 +3665,10 @@ ira (FILE *f)
       regstat_compute_ri ();
     }
 
-  allocate_initial_values (reg_equivs);
-
   overall_cost_before = ira_overall_cost;
-  if (ira_conflicts_p)
+  if (! ira_conflicts_p)
+    grow_reg_equivs ();
+  else
     {
       fix_reg_equiv_init ();
 
@@ -3686,6 +3684,7 @@ ira (FILE *f)
       memset (ira_spilled_reg_stack_slots, 0,
              max_regno * sizeof (struct ira_spilled_reg_stack_slot));
     }
+  allocate_initial_values (reg_equivs);
 
   timevar_pop (TV_IRA);