re PR c/35430 (ICE with complex arithmetic)

	PR c/35430
	* c-common.c (warn_for_sign_compare): For complex result_type
	use component's type.

	* gcc.dg/pr35430.c: New test.
	* g++.dg/warn/Wsign-compare-2.C: New test.

Co-Authored-By: Andrew Pinski <andrew_pinski@playstation.sony.com>

From-SVN: r141587

gcc/ChangeLog

+2008-11-04  Jakub Jelinek  <jakub@redhat.com>
+	    Andrew Pinski  <andrew_pinski@playstation.sony.com>
+
+	PR c/35430
+	* c-common.c (warn_for_sign_compare): For complex result_type
+	use component's type.
+
 2008-11-04  Jakub Jelinek  <jakuB@redhat.com>
 
 	* print-tree.c (print_node): Use code instead of TREE_CODE (node).

gcc/c-common.c

@@ -8258,7 +8258,7 @@ warn_for_sign_compare (location_t location,
     /* OK */;
   else
     {
-      tree sop, uop;
+      tree sop, uop, base_type;
       bool ovf;
 
       if (op0_signed)
@@ -8268,6 +8268,8 @@ warn_for_sign_compare (location_t location,
 
       STRIP_TYPE_NOPS (sop); 
       STRIP_TYPE_NOPS (uop);
+      base_type = (TREE_CODE (result_type) == COMPLEX_TYPE
+		   ? TREE_TYPE (result_type) : result_type);
 
       /* Do not warn if the signed quantity is an unsuffixed integer
          literal (or some static constant expression involving such
@@ -8280,7 +8282,7 @@ warn_for_sign_compare (location_t location,
          in the result if the result were signed.  */
       else if (TREE_CODE (uop) == INTEGER_CST
                && (resultcode == EQ_EXPR || resultcode == NE_EXPR)
-               && int_fits_type_p (uop, c_common_signed_type (result_type)))
+	       && int_fits_type_p (uop, c_common_signed_type (base_type)))
         /* OK */;
       /* In C, do not warn if the unsigned quantity is an enumeration
          constant and its maximum value would fit in the result if the
@@ -8288,7 +8290,7 @@ warn_for_sign_compare (location_t location,
       else if (!c_dialect_cxx() && TREE_CODE (uop) == INTEGER_CST
                && TREE_CODE (TREE_TYPE (uop)) == ENUMERAL_TYPE
                && int_fits_type_p (TYPE_MAX_VALUE (TREE_TYPE (uop)),
-                                   c_common_signed_type (result_type)))
+				   c_common_signed_type (base_type)))
         /* OK */;
       else 
         warning_at (location,

gcc/testsuite/ChangeLog

 2008-11-04  Jakub Jelinek  <jakub@redhat.com>
+	    Andrew Pinski  <andrew_pinski@playstation.sony.com>
+
+	PR c/35430
+	* gcc.dg/pr35430.c: New test.
+	* g++.dg/warn/Wsign-compare-2.C: New test.
+
+2008-11-04  Jakub Jelinek  <jakub@redhat.com>
 
 	PR c/37106
 	* gcc.dg/pr37106-1.c: New test.

gcc/testsuite/g++.dg/warn/Wsign-compare-2.C

+// PR c/35430
+// { dg-do compile }
+// { dg-options "-Wsign-compare" }
+
+void
+foo (__complex__ int i)
+{
+  i == 0u;
+  i == ~1u;	// { dg-warning "comparison between signed and unsigned integer expressions" }
+}

gcc/testsuite/gcc.dg/pr35430.c

+/* PR c/35430 */
+/* { dg-do compile } */
+/* { dg-options "-Wsign-compare" } */
+
+void
+foo (__complex__ int i)
+{
+  i == 0u;
+  i == ~1u;	/* { dg-warning "comparison between signed and unsigned integer expressions" } */
+}