From: Richard Kenner <kenner@gcc.gnu.org>
Date: Thu, 20 Aug 1992 12:36:23 +0000 (-0400)
Subject: (init_expr_once): Set direct_load and direct_store if SOME hard register can be loade... 
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=e6fe56a4248d990cdeb8d1d5ddaed1e2510754fb;p=gcc.git

(init_expr_once): Set direct_load and direct_store if SOME hard register can be loaded or stored...

(init_expr_once): Set direct_load and direct_store if SOME hard
register can be loaded or stored; not just if the first one we pick
can be.

From-SVN: r1910
---

diff --git a/gcc/expr.c b/gcc/expr.c
index 315474d835f..2a94dcac4d7 100644
--- a/gcc/expr.c
+++ b/gcc/expr.c
@@ -155,23 +155,28 @@ init_expr_once ()
       direct_load[(int) mode] = direct_store[(int) mode] = 0;
       PUT_MODE (mem, mode);
 
-      /* Find a register that can be used in this mode, if any.  */
-      for (regno = 0; regno < FIRST_PSEUDO_REGISTER; regno++)
-	if (HARD_REGNO_MODE_OK (regno, mode))
-	  break;
+      /* See if there is some register that can be used in this mode and
+	 directly loaded or stored from memory.  */
 
-      if (regno == FIRST_PSEUDO_REGISTER)
-	continue;
+      for (regno = 0; regno < FIRST_PSEUDO_REGISTER
+	   && (direct_load[(int) mode] == 0 || direct_store[(int) mode] == 0);
+	   regno++)
+	{
+	  if (! HARD_REGNO_MODE_OK (regno, mode))
+	    continue;
 
-      reg = gen_rtx (REG, mode, regno);
+	  reg = gen_rtx (REG, mode, regno);
 
-      SET_SRC (pat) = mem;
-      SET_DEST (pat) = reg;
-      direct_load[(int) mode] = (recog (pat, insn, &num_clobbers)) >= 0;
+	  SET_SRC (pat) = mem;
+	  SET_DEST (pat) = reg;
+	  if (recog (pat, insn, &num_clobbers) >= 0)
+	    direct_load[(int) mode] = 1;
 
-      SET_SRC (pat) = reg;
-      SET_DEST (pat) = mem;
-      direct_store[(int) mode] = (recog (pat, insn, &num_clobbers)) >= 0;
+	  SET_SRC (pat) = reg;
+	  SET_DEST (pat) = mem;
+	  if (recog (pat, insn, &num_clobbers) >= 0)
+	    direct_store[(int) mode] = 1;
+	}
 
       movstr_optab[(int) mode] = CODE_FOR_nothing;
     }