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Re: optimization/4815

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http://gcc.gnu.org/cgi-bin/gnatsweb.pl?cmd=view%20audit-trail&pr=4815&database=gcc

I have a better patch than the one mentioned in the e-mail archive.

Can you try the following patch?  It merges in some changes from the gcc
3.1
tree.

Index: alias.c
===================================================================
RCS file: /cvs/gcc/gcc/gcc/alias.c,v
retrieving revision 1.115.4.7
diff -u -r1.115.4.7 alias.c
--- alias.c     2001/09/11 21:39:24     1.115.4.7
+++ alias.c     2001/11/17 06:19:01
@@ -1041,6 +1041,9 @@
   /* Some RTL can be compared without a recursive examination.  */
   switch (code)
     {
+    case VALUE:
+     return CSELIB_VAL_PTR (x) == CSELIB_VAL_PTR (y);
+
     case REG:
       return REGNO (x) == REGNO (y);

@@ -1109,6 +1112,12 @@
          if (rtx_equal_for_memref_p (XEXP (x, i), XEXP (y, i)) == 0)
            return 0;
          break;
+
+         /* This can happen for asm operands.  */
+       case 's':
+         if (strcmp (XSTR (x, i), XSTR (y, i)))
+           return 0;
+       break;

        /* This can happen for an asm which clobbers memory.  */
        case '0':

--
Craig Rodrigues
http://www.gis.net/~craigr
rodrigc@mediaone.net




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