Another case where one address space may support multiple pointer
sizes, so conversions between such must be preserved.
* tree-ssa.c (useless_type_conversion_p): Conversions between
different-sized pointers aren't useless.
Index: tree-ssa.c
===================================================================
--- tree-ssa.c (revision 183139)
+++ tree-ssa.c (working copy)
@@ -1192,12 +1192,17 @@ bool
useless_type_conversion_p (tree outer_type, tree inner_type)
{
/* Do the following before stripping toplevel qualifiers. */
if (POINTER_TYPE_P (inner_type)
&& POINTER_TYPE_P (outer_type))
{
+ /* Do not lose casts between pointers of different precision. */
+ if (TYPE_PRECISION (outer_type)
+ != TYPE_PRECISION (inner_type))
+ return false;
+
/* Do not lose casts between pointers to different address spaces. */
if (TYPE_ADDR_SPACE (TREE_TYPE (outer_type))
!= TYPE_ADDR_SPACE (TREE_TYPE (inner_type)))
return false;
/* If the outer type is (void *), the conversion is not necessary. */
