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re PR c++/37342 (same canonical type node for different types void (Asm::*)(std::ostream&) and void (Asm::* const)(std::ostream&))

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2008-09-05  Douglas Gregor  <doug.gregor@gmail.com>

       PR c++/37342
       * tree.c (cp_build_qualified_type_real): Deal with sharing of
       TYPE_LANG_SPECIFIC in the canonical types of pointer-to-method
       types.
	
2008-09-05  Douglas Gregor  <doug.gregor@gmail.com>

       PR c++/37342
       * g++.dg/other/canon-37342.C: New.

From-SVN: r140037
This commit is contained in:
Douglas Gregor 2008-09-05 17:04:12 +00:00 • committed by Doug Gregor
parent 37fbe8a344
commit 7aa4a1dfa9
4 changed files with 31 additions and 0 deletions
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7
gcc/cp/ChangeLog
View file

@ -1,3 +1,10 @@
2008-09-05 Douglas Gregor <doug.gregor@gmail.com>
PR c++/37342
* tree.c (cp_build_qualified_type_real): Deal with sharing of
TYPE_LANG_SPECIFIC in the canonical types of pointer-to-method
types.
2008-09-04 Ian Lance Taylor <iant@google.com>
* parser.c (check_no_duplicate_clause): Change code parameter to

11
gcc/cp/tree.c
View file

@ -877,6 +877,17 @@ cp_build_qualified_type_real (tree type,
&& TYPE_LANG_SPECIFIC (result) == TYPE_LANG_SPECIFIC (type))
TYPE_LANG_SPECIFIC (result) = NULL;
/* We may also have ended up building a new copy of the canonical
type of a pointer-to-method type, which could have the same
sharing problem described above. */
if (TYPE_CANONICAL (result) != TYPE_CANONICAL (type)
&& TREE_CODE (type) == POINTER_TYPE
&& TREE_CODE (TREE_TYPE (type)) == METHOD_TYPE
&& (TYPE_LANG_SPECIFIC (TYPE_CANONICAL (result))
== TYPE_LANG_SPECIFIC (TYPE_CANONICAL (type))))
TYPE_LANG_SPECIFIC (TYPE_CANONICAL (result)) = NULL;
return result;
}

5
gcc/testsuite/ChangeLog
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@ -1,3 +1,8 @@
2008-09-05 Douglas Gregor <doug.gregor@gmail.com>
PR c++/37342
* g++.dg/other/canon-37342.C: New.
2008-09-05 Joseph Myers <joseph@codesourcery.com>
* gcc.c-torture/compile/20080903-1.c: New test.

8
gcc/testsuite/g++.dg/other/canon-37342.C Normal file
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@ -0,0 +1,8 @@
class Asm;
template<typename _CharT> class basic_ostream;
typedef basic_ostream<char> ostream;
class Options {
typedef void (Asm::* emitfunc_t) (ostream &);
emitfunc_t getemit () const { return emitfunc; }
emitfunc_t emitfunc;
};