> >
> > 2019-12-09 Richard Sandiford <richard.sandif...@arm.com>
> >
> > gcc/
> > * ipa-utils.h (get_odr_name_for_type): Check for a TYPE_DECL.
> > * ipa-devirt.c (warn_types_mismatch): Don't call xstrdup for the
> > second demangled name.
> >
> > gcc/testsuite/
> > * gcc.dg/lto/tag-1_0.c, gcc.dg/lto/tag-1_1.c: New test.
OK,
thanks
Honza
> >
> > Index: gcc/ipa-utils.h
> > ===================================================================
> > --- gcc/ipa-utils.h 2019-12-09 12:23:47.000000000 +0000
> > +++ gcc/ipa-utils.h 2019-12-09 12:23:48.326292463 +0000
> > @@ -256,6 +256,7 @@ get_odr_name_for_type (tree type)
> > {
> > tree type_name = TYPE_NAME (type);
> > if (type_name == NULL_TREE
> > + || TREE_CODE (type_name) != TYPE_DECL
> > || !DECL_ASSEMBLER_NAME_SET_P (type_name))
> > return NULL;
> > Index: gcc/ipa-devirt.c
> > ===================================================================
> > --- gcc/ipa-devirt.c 2019-12-09 12:23:47.000000000 +0000
> > +++ gcc/ipa-devirt.c 2019-12-09 12:23:48.326292463 +0000
> > @@ -1042,7 +1042,7 @@ warn_types_mismatch (tree t1, tree t2, l
> > {
> > const int opts = DMGL_PARAMS | DMGL_ANSI | DMGL_TYPES;
> > char *name1 = xstrdup (cplus_demangle (odr1, opts));
> > - char *name2 = xstrdup (cplus_demangle (odr2, opts));
> > + char *name2 = cplus_demangle (odr2, opts);
> > if (name1 && name2 && strcmp (name1, name2))
> > {
> > inform (loc_t1,
> > Index: gcc/testsuite/gcc.dg/lto/tag-1_0.c
> > ===================================================================
> > --- /dev/null 2019-09-17 11:41:18.176664108 +0100
> > +++ gcc/testsuite/gcc.dg/lto/tag-1_0.c 2019-12-09 12:23:48.326292463
> > +0000
> > @@ -0,0 +1,5 @@
> > +/* { dg-lto-do link } */
> > +/* { dg-lto-options { { -Wodr -flto } } } */
> > +
> > +struct foo { int x; };
> > +struct foo a = {};
> > Index: gcc/testsuite/gcc.dg/lto/tag-1_1.c
> > ===================================================================
> > --- /dev/null 2019-09-17 11:41:18.176664108 +0100
> > +++ gcc/testsuite/gcc.dg/lto/tag-1_1.c 2019-12-09 12:23:48.326292463
> > +0000
> > @@ -0,0 +1,6 @@
> > +struct foo { short x; };
> > +
> > +extern struct foo a; /* { dg-lto-warning {type of 'a' does not match
> > original declaration} } */
> > +struct foo *ptr = &a;
> > +
> > +int main () { return 0; }
> >
>
