From: Richard Kenner <kenner@gcc.gnu.org>
Date: Wed, 31 Mar 1993 12:00:31 +0000 (-0500)
Subject: (insert_regs): If a REG already is in a class but not in the mode we
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=1ff0c00d9f3d9eb2f6e4143c9c3daba4ff3c1d07;p=gcc.git

(insert_regs): If a REG already is in a class but not in the mode we
want, don't do anything to the classes.

From-SVN: r3951
---

diff --git a/gcc/cse.c b/gcc/cse.c
index 44042471278..a2aac9447fc 100644
--- a/gcc/cse.c
+++ b/gcc/cse.c
@@ -984,9 +984,14 @@ insert_regs (x, classp, modified)
     {
       register int regno = REGNO (x);
 
-      if (modified
-	  || ! (REGNO_QTY_VALID_P (regno)
-		&& qty_mode[reg_qty[regno]] == GET_MODE (x)))
+      /* If REGNO is in the equivalence table already but is of the
+	 wrong mode for that equivalence, don't do anything here.  */
+
+      if (REGNO_QTY_VALID_P (regno)
+	  && qty_mode[reg_qty[regno]] != GET_MODE (x))
+	return 0;
+
+      if (modified || ! REGNO_QTY_VALID_P (regno))
 	{
 	  if (classp)
 	    for (classp = classp->first_same_value;