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[PATCH c++/86881] -Wshadow-local-compatible ICE

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https://gcc.gnu.org/ml/gcc-patches/2018-09/msg00984.html
	PR c++/86881
	cp/
	* name-lookup.c (check_local_shadow): Ignore auto types.

	testsuite/
	* g++.dg/warn/pr86881.C: New.

From-SVN: r264391
This commit is contained in:
Nathan Sidwell 2018-09-18 13:52:30 +00:00 committed by Nathan Sidwell
parent 0dce552628
commit 3897f13410
4 changed files with 37 additions and 0 deletions
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5
gcc/cp/ChangeLog
View File

@ -1,3 +1,8 @@
2018-09-18 Nathan Sidwell <nathan@acm.org>
PR c++/86881
* name-lookup.c (check_local_shadow): Ignore auto types.
2018-09-17 David Malcolm <dmalcolm@redhat.com>
* error.c (range_label_for_type_mismatch::get_text): Update for

7
gcc/cp/name-lookup.c
View File

@ -2764,6 +2764,13 @@ check_local_shadow (tree decl)
&& (same_type_p (TREE_TYPE (old), TREE_TYPE (decl))
|| (!dependent_type_p (TREE_TYPE (decl))
&& !dependent_type_p (TREE_TYPE (old))
/* If the new decl uses auto, we don't yet know
its type (the old type cannot be using auto
at this point, without also being
dependent). This is an indication we're
(now) doing the shadow checking too
early. */
&& !type_uses_auto (TREE_TYPE (decl))
&& can_convert (TREE_TYPE (old), TREE_TYPE (decl),
tf_none))))
warning_code = OPT_Wshadow_compatible_local;

5
gcc/testsuite/ChangeLog
View File

@ -1,3 +1,8 @@
2018-09-18 Nathan Sidwell <nathan@acm.org>
PR c++/86881
* g++.dg/warn/pr86881.C: New.
2018-09-18 Kyrylo Tkachov <kyrylo.tkachov@arm.com>
* gcc.target/aarch64/spellcheck_1.c:

20
gcc/testsuite/g++.dg/warn/pr86881.C Normal file
View File

@ -0,0 +1,20 @@
// PR c++/86881 ICE with shadow warning
// { dg-do compile { c++11 } }
// { dg-additional-options { -Wshadow-compatible-local } }}
void a() {
auto b([] {});
{
auto b = 0;
}
}
struct Proxy { };
void Two ()
{
auto my = Proxy ();
{
auto my = Proxy (); // { dg-warning "shadows" "" { xfail *-*-* } }
};
}