if-div.c: New file.

2007-05-02  Eric Christopher  <echristo@apple.com>

	    * gcc.dg/cpp/if-div.c: New file.

2007-05-02  Eric Christopher  <echristo@apple.com>

	    * expr.c (num_div_op): Don't overflow if the result is
	    zero.

From-SVN: r124358

gcc/testsuite/ChangeLog

+2007-05-02  Eric Christopher  <echristo@apple.com>
+
+	* gcc.dg/cpp/if-div.c: New file.
+
 2007-05-02  Tom Tromey  <tromey@redhat.com>
 
 	PR preprocessor/28709:
@@ -47,9 +51,9 @@
 2007-05-01  Dorit Nuzman  <dorit@il.ibm.com>
 
 	PR testsuite/31589
-	* gcc.dg/vect/vect-iv-9.c: Added vect_int_mult target keyword to 
+	* gcc.dg/vect/vect-iv-9.c: Added vect_int_mult target keyword to
 	dg-final test.
-	* gcc.dg/vect/vect-reduc-dot-u16b.c: Added vect_pack_trunc target 
+	* gcc.dg/vect/vect-reduc-dot-u16b.c: Added vect_pack_trunc target
 	keyword to dg-final test.
 	* gcc.dg/vect/vect-iv-4.c: Likewise.
 	* gcc.dg/vect/vect-widen-mult-u16.c: Likewise.
@@ -58,7 +62,7 @@
 	* gcc.dg/vect/vect-reduc-dot-u16a.c: Change variable type to avoid a
 	cast.
 	* gcc.dg/vect/no-section-anchors-vect-69.c: xfail on is64.
-	* lib/target-supports.exp 
+	* lib/target-supports.exp
 	(check_effective_target_vect_widen_sum_hi_to_si): Added ia64.
 	(check_effective_target_vect_widen_sum_qi_to_hi): Added ia64.
 
@@ -263,7 +267,7 @@
 	    Olga Golovanevsky  <olga@il.ibm.com>
 
 	* g++.dg/other/str_empty.C: New test.
-	
+
 2007-04-24  Richard Henderson  <rth@redhat.com>
 
 	* gcc.dg/vect/vect.exp: Don't run tests on Alpha.

gcc/testsuite/gcc.dg/cpp/if-div.c

+/* { dg-do preprocess } */
+
+/* Test that this preprocesses without error.  */
+
+#if (-1)/2
+#endif

libcpp/ChangeLog

+2007-05-02  Eric Christopher  <echristo@apple.com>
+
+	* expr.c (num_div_op): Don't overflow if the result is
+	zero.
+
 2007-05-02  Tom Tromey  <tromey@redhat.com>
 
 	PR preprocessor/28709:

libcpp/expr.c

@@ -91,7 +91,7 @@ interpret_float_suffix (const uchar *s, size_t len)
       case 'l': case 'L': l++; break;
       case 'i': case 'I':
       case 'j': case 'J': i++; break;
-      case 'd': case 'D': 
+      case 'd': case 'D':
 	/* Disallow fd, ld suffixes.  */
 	if (d && (f || l))
 	  return 0;
@@ -441,7 +441,7 @@ append_digit (cpp_num num, int digit, int base, size_t precision)
   if (add_low + digit < add_low)
     add_high++;
   add_low += digit;
-    
+
   if (result.low + add_low < result.low)
     add_high++;
   if (result.high + add_high < result.high)
@@ -1527,7 +1527,8 @@ num_div_op (cpp_reader *pfile, cpp_num lhs, cpp_num rhs, enum cpp_ttype op)
 	{
 	  if (negate)
 	    result = num_negate (result, precision);
-	  result.overflow = num_positive (result, precision) ^ !negate;
+	  result.overflow = (num_positive (result, precision) ^ !negate
+			     && !num_zerop (result));
 	}
 
       return result;