2010-01-14 Alexander Monakov <amonakov@ispras.ru>

	* sel-sched.c (choose_best_reg_1):  Loop over all regs for mode.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@155897 138bc75d-0d04-0410-961f-82ee72b054a4

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 56375a9..abfd461 100644 (file)
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,5 +1,9 @@
 2010-01-14  Alexander Monakov  <amonakov@ispras.ru>
 
+       * sel-sched.c (choose_best_reg_1):  Loop over all regs for mode.
+
+2010-01-14  Alexander Monakov  <amonakov@ispras.ru>
+
        * sel-sched.c (mark_unavailable_hard_regs): Do not try to search
        available registers when failed to discover LHS register class.
        Fix indentation.  Update comment.

diff --git a/gcc/sel-sched.c b/gcc/sel-sched.c
index 7fb0882..bdc7f9c 100644 (file)
--- a/gcc/sel-sched.c
+++ b/gcc/sel-sched.c
@@ -1429,6 +1429,16 @@ choose_best_reg_1 (HARD_REG_SET hard_regs_used,
                                   0, cur_reg, hrsi)
     if (! TEST_HARD_REG_BIT (hard_regs_used, cur_reg))
       {
+       /* Check that all hard regs for mode are available.  */
+       for (i = 1, n = hard_regno_nregs[cur_reg][mode]; i < n; i++)
+         if (TEST_HARD_REG_BIT (hard_regs_used, cur_reg + i)
+             || !TEST_HARD_REG_BIT (reg_rename_p->available_for_renaming,
+                                    cur_reg + i))
+           break;
+
+       if (i < n)
+         continue;
+
         /* All hard registers are available.  */
         if (best_new_reg < 0
             || reg_rename_tick[cur_reg] < reg_rename_tick[best_new_reg])
@@ -1460,6 +1470,7 @@ choose_best_reg (HARD_REG_SET hard_regs_used, struct reg_rename *reg_rename_p,
   rtx best_reg = choose_best_reg_1 (hard_regs_used, reg_rename_p,
                                     original_insns, is_orig_reg_p_ptr);
 
+  /* FIXME loop over hard_regno_nregs here.  */
   gcc_assert (best_reg == NULL_RTX
              || TEST_HARD_REG_BIT (sel_hrd.regs_ever_used, REGNO (best_reg)));