cse.c (exp_equiv_p): Special case CONST_DOUBLE.

* cse.c (exp_equiv_p): Special case CONST_DOUBLE.
        * cselib.c (rtx_equal_for_cselib_p): Likewise.
        * jump.c (rtx_renumbered_equal_p): Likewise.
        * loop.c (rtx_equal_for_loop_p): Tidy and special case PC, CC0,
        CONST_INT and CONST_DOUBLE.
        (rtx_equal_for_prefetch_p): Likewise, plus LABEL_REF.
        * reload.c (operands_match_p): Special case CONST_INT and
        CONST_DOUBLE; check mode earlier.

From-SVN: r102548

gcc/ChangeLog

@@ -1,3 +1,14 @@
+2005-07-28  Richard Henderson  <rth@redhat.com>
+
+	* cse.c (exp_equiv_p): Special case CONST_DOUBLE.
+	* cselib.c (rtx_equal_for_cselib_p): Likewise.
+	* jump.c (rtx_renumbered_equal_p): Likewise.
+	* loop.c (rtx_equal_for_loop_p): Tidy and special case PC, CC0,
+	CONST_INT and CONST_DOUBLE.
+	(rtx_equal_for_prefetch_p): Likewise, plus LABEL_REF.
+	* reload.c (operands_match_p): Special case CONST_INT and
+	CONST_DOUBLE; check mode earlier.
+
 2005-07-29  Joseph S. Myers  <joseph@codesourcery.com>
 
 	PR c/22240

gcc/cse.c

@@ -2498,6 +2498,7 @@ exp_equiv_p (rtx x, rtx y, int validate, bool for_gcse)
     case PC:
     case CC0:
     case CONST_INT:
+    case CONST_DOUBLE:
       return x == y;
 
     case LABEL_REF:

gcc/cselib.c

@@ -462,9 +462,18 @@ rtx_equal_for_cselib_p (rtx x, rtx y)
   if (GET_CODE (x) != GET_CODE (y) || GET_MODE (x) != GET_MODE (y))
     return 0;
 
-  /* This won't be handled correctly by the code below.  */
+  /* These won't be handled correctly by the code below.  */
-  if (GET_CODE (x) == LABEL_REF)
+  switch (GET_CODE (x))
-    return XEXP (x, 0) == XEXP (y, 0);
+    {
+    case CONST_DOUBLE:
+      return 0;
+
+    case LABEL_REF:
+      return XEXP (x, 0) == XEXP (y, 0);
+
+    default:
+      break;
+    }
 
   code = GET_CODE (x);
   fmt = GET_RTX_FORMAT (code);

gcc/jump.c

@@ -1879,6 +1879,7 @@ rtx_renumbered_equal_p (rtx x, rtx y)
     case ADDR_VEC:
     case ADDR_DIFF_VEC:
     case CONST_INT:
+    case CONST_DOUBLE:
       return 0;
 
     case LABEL_REF:

gcc/loop.c

@@ -2057,14 +2057,26 @@ rtx_equal_for_loop_p (rtx x, rtx y, struct loop_movables *movables,
   if (GET_MODE (x) != GET_MODE (y))
     return 0;
 
-  /* These three types of rtx's can be compared nonrecursively.  */
+  /* These types of rtx's can be compared nonrecursively.  */
-  if (code == REG)
+  switch (code)
-    return (REGNO (x) == REGNO (y) || regs_match_p (x, y, movables));
+    {
+    case PC:
+    case CC0:
+    case CONST_INT:
+    case CONST_DOUBLE:
+      return 0;
 
-  if (code == LABEL_REF)
+    case REG:
-    return XEXP (x, 0) == XEXP (y, 0);
+      return (REGNO (x) == REGNO (y) || regs_match_p (x, y, movables));
-  if (code == SYMBOL_REF)
+
-    return XSTR (x, 0) == XSTR (y, 0);
+    case LABEL_REF:
+      return XEXP (x, 0) == XEXP (y, 0);
+    case SYMBOL_REF:
+      return XSTR (x, 0) == XSTR (y, 0);
+
+    default:
+      break;
+    }
 
   /* Compare the elements.  If any pair of corresponding elements
      fail to match, return 0 for the whole things.  */
@@ -3984,6 +3996,24 @@ rtx_equal_for_prefetch_p (rtx x, rtx y)
   if (code != GET_CODE (y))
     return 0;
 
+  if (GET_MODE (x) != GET_MODE (y))
+    return 0;
+
+  switch (code)
+    {
+    case PC:
+    case CC0:
+    case CONST_INT:
+    case CONST_DOUBLE:
+      return 0;
+
+    case LABEL_REF:
+      return XEXP (x, 0) == XEXP (y, 0);
+
+    default:
+      break;
+    }
+
   if (COMMUTATIVE_ARITH_P (x))
     {
       return ((rtx_equal_for_prefetch_p (XEXP (x, 0), XEXP (y, 0))

gcc/reload.c

@@ -2208,20 +2208,30 @@ operands_match_p (rtx x, rtx y)
 
  slow:
 
-  /* Now we have disposed of all the cases
+  /* Now we have disposed of all the cases in which different rtx codes
-     in which different rtx codes can match.  */
+     can match.  */
   if (code != GET_CODE (y))
     return 0;
-  if (code == LABEL_REF)
-    return XEXP (x, 0) == XEXP (y, 0);
-  if (code == SYMBOL_REF)
-    return XSTR (x, 0) == XSTR (y, 0);
 
   /* (MULT:SI x y) and (MULT:HI x y) are NOT equivalent.  */
-
   if (GET_MODE (x) != GET_MODE (y))
     return 0;
 
+  switch (code)
+    {
+    case CONST_INT:
+    case CONST_DOUBLE:
+      return 0;
+
+    case LABEL_REF:
+      return XEXP (x, 0) == XEXP (y, 0);
+    case SYMBOL_REF:
+      return XSTR (x, 0) == XSTR (y, 0);
+
+    default:
+      break;
+    }
+
   /* Compare the elements.  If any pair of corresponding elements
      fail to match, return 0 for the whole things.  */