fortran/

[pf3gnuchains/gcc-fork.git] / gcc / rtlanal.c

diff --git a/gcc/rtlanal.c b/gcc/rtlanal.c
index 6a7a696..8a7c914 100644 (file)
--- a/gcc/rtlanal.c
+++ b/gcc/rtlanal.c
@@ -368,17 +368,7 @@ nonzero_address_p (rtx x)
 
     case PLUS:
       if (GET_CODE (XEXP (x, 1)) == CONST_INT)
-       {
-         /* Pointers aren't allowed to wrap.  If we've got a register
-            that is known to be a pointer, and a positive offset, then
-            the composite can't be zero.  */
-         if (INTVAL (XEXP (x, 1)) > 0
-             && REG_P (XEXP (x, 0))
-             && REG_POINTER (XEXP (x, 0)))
-           return true;
-
-         return nonzero_address_p (XEXP (x, 0));
-       }
+        return nonzero_address_p (XEXP (x, 0));
       /* Handle PIC references.  */
       else if (XEXP (x, 0) == pic_offset_table_rtx
               && CONSTANT_P (XEXP (x, 1)))
@@ -2847,10 +2837,15 @@ auto_inc_p (rtx x)
 int
 loc_mentioned_in_p (rtx *loc, rtx in)
 {
-  enum rtx_code code = GET_CODE (in);
-  const char *fmt = GET_RTX_FORMAT (code);
+  enum rtx_code code;
+  const char *fmt;
   int i, j;
 
+  if (!in)
+    return 0;
+
+  code = GET_CODE (in);
+  fmt = GET_RTX_FORMAT (code);
   for (i = GET_RTX_LENGTH (code) - 1; i >= 0; i--)
     {
       if (loc == &in->u.fld[i].rt_rtx)
@@ -3286,7 +3281,7 @@ rtx_cost (rtx x, enum rtx_code outer_code ATTRIBUTE_UNUSED)
       total = COSTS_N_INSNS (7);
       break;
     case USE:
-      /* Used in loop.c and combine.c as a marker.  */
+      /* Used in combine.c as a marker.  */
       total = 0;
       break;
     default: