re PR c/52862 (ICE convert_to_pointer, at convert.c:50)

2012-04-13  Richard Guenther  <rguenther@suse.de>

	PR c/52862
	* convert.c (convert_to_pointer): Remove special-casing of
	zero.

	* gcc.dg/pr52862.c: New testcase.

From-SVN: r186407

gcc/ChangeLog

+2012-04-13  Richard Guenther  <rguenther@suse.de>
+
+	PR c/52862
+	* convert.c (convert_to_pointer): Remove special-casing of
+	zero.
+
 2012-04-13  Joey Ye  <joey.ye@arm.com>
 
 	* config/arm/constraints.md (Pe): New constraint.

gcc/convert.c

@@ -44,11 +44,6 @@ convert_to_pointer (tree type, tree expr)
   if (TREE_TYPE (expr) == type)
     return expr;
 
-  /* Propagate overflow to the NULL pointer.  */
-  if (integer_zerop (expr))
-    return force_fit_type_double (type, double_int_zero, 0,
-				  TREE_OVERFLOW (expr));
-
   switch (TREE_CODE (TREE_TYPE (expr)))
     {
     case POINTER_TYPE:

gcc/testsuite/ChangeLog

+2012-04-13  Richard Guenther  <rguenther@suse.de>
+
+	PR c/52862
+	* gcc.dg/pr52862.c: New testcase.
+
 2012-04-13  Joey Ye  <joey.ye@arm.com>
 
 	* gcc.target/arm/thumb1-imm.c: New testcase.

gcc/testsuite/gcc.dg/pr52862.c

+/* { dg-do compile } */
+/* { dg-options "-O" } */
+
+void ASMAtomicWritePtrVoid(const void *pv);
+void rtThreadDestroy(void)
+{
+  void * const pvTypeChecked = ((void *)0);
+  ASMAtomicWritePtrVoid((void *)(pvTypeChecked));
+}