combine.c (force_to_mode): Only replace with (not Y) if all bits in fuller_mask…

combine.c (force_to_mode): Only replace with (not Y) if all bits in fuller_mask (not just mask) are set in C.

	* combine.c (force_to_mode): Only replace with (not Y) if all bits in fuller_mask
	(not just mask) are set in C.

	* gcc.c-torture/execute/20021118-3.c: New test.

From-SVN: r59295

gcc/ChangeLog

+2002-11-20  Jakub Jelinek  <jakub@redhat.com>
+
+	* combine.c (force_to_mode): Only replace with (not Y) if all bits in fuller_mask
+	(not just mask) are set in C.
+
 2002-11-19  Andreas Jaeger  <aj@suse.de>
 
 	* loop.c (record_giv): Initialize not_replaceable.

gcc/combine.c

@@ -6978,10 +6978,10 @@ force_to_mode (x, mode, mask, reg, just_select)
 	  return force_to_mode (x, mode, mask, reg, next_select);
 	}
 
-      /* Similarly, if C contains every bit in the mask, then we may
+      /* Similarly, if C contains every bit in the fuller_mask, then we may
 	 replace with (not Y).  */
       if (GET_CODE (XEXP (x, 0)) == CONST_INT
-	  && ((INTVAL (XEXP (x, 0)) | (HOST_WIDE_INT) mask)
+	  && ((INTVAL (XEXP (x, 0)) | (HOST_WIDE_INT) fuller_mask)
 	      == INTVAL (XEXP (x, 0))))
 	{
 	  x = simplify_gen_unary (NOT, GET_MODE (x),

gcc/testsuite/ChangeLog

+2002-11-20  Jakub Jelinek  <jakub@redhat.com>
+
+	* gcc.c-torture/execute/20021118-3.c: New test.
+
 2002-11-19 Eric Botcazou <ebotcazou@libertysurf.fr>
 
 	* gcc.c-torture/compile/20021119-1.c: New test.

gcc/testsuite/gcc.c-torture/execute/20021118-3.c

+extern void abort (void);
+extern void exit (int);
+
+int
+foo (int x)
+{
+  if (x == -2 || -x - 100 >= 0)
+    abort ();
+  return 0;
+}
+           
+int
+main ()
+{
+  foo (-3);
+  foo (-99);
+  exit (0);
+}