[Bug lto/62190] LTO DWARF produces __unknown__ type for unsigned int function argument type

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=62190

Richard Biener <rguenth at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |ASSIGNED
   Last reconfirmed|                            |2014-08-20
           Assignee|unassigned at gcc dot gnu.org      |rguenth at gcc dot gnu.org
     Ever confirmed|0                           |1

--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
Ok, so the reason is that when C parses 'unsigned int' it somehow ends up using
uint32_type_node instead of unsigned_int_type_node and LTO only assigns
identifiers to a subset of all types (well, we're lazy...).

"Somehow ends up" because unsigned_type_node is pointer-equal to
uint64_type_node
for C.

I can see how this is annoying.  Will fix.

Index: gcc/tree.c
===================================================================
--- gcc/tree.c  (revision 214212)
+++ gcc/tree.c  (working copy)
@@ -9698,9 +9698,9 @@ build_common_tree_nodes (bool signed_cha
   integer_ptr_type_node = build_pointer_type (integer_type_node);

   /* Fixed size integer types.  */
-  uint16_type_node = build_nonstandard_integer_type (16, true);
-  uint32_type_node = build_nonstandard_integer_type (32, true);
-  uint64_type_node = build_nonstandard_integer_type (64, true);
+  uint16_type_node = make_or_reuse_type (16, 1);
+  uint32_type_node = make_or_reuse_type (32, 1);
+  uint64_type_node = make_or_reuse_type (64, 1);

   /* Decimal float types. */
   dfloat32_type_node = make_node (REAL_TYPE);