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C++ PATCH for c++/66216 (ICE with aligned attribute)
- From: Jason Merrill <jason at redhat dot com>
- To: gcc-patches List <gcc-patches at gcc dot gnu dot org>
- Date: Fri, 26 Jun 2015 17:30:15 -0400
- Subject: C++ PATCH for c++/66216 (ICE with aligned attribute)
- Authentication-results: sourceware.org; auth=none
We weren't properly propagating the alignment to other variants after
applying it, so we ended up with two const-qualified variants with
different alignment.
Tested x86_64-pc-linux-gnu, applying to trunk and 5.
commit ffea563209dfc6daf1054fffc6f8d726e440f1dc
Author: Jason Merrill <jason@redhat.com>
Date: Fri Jun 26 16:52:01 2015 -0400
PR c++/66216
* class.c (finish_struct): Call fixup_attribute_variants.
diff --git a/gcc/cp/class.c b/gcc/cp/class.c
index f4e4f85..be31de2 100644
--- a/gcc/cp/class.c
+++ b/gcc/cp/class.c
@@ -6820,6 +6820,7 @@ finish_struct (tree t, tree attributes)
unreverse_member_declarations (t);
cplus_decl_attributes (&t, attributes, (int) ATTR_FLAG_TYPE_IN_PLACE);
+ fixup_attribute_variants (t);
/* Nadger the current location so that diagnostics point to the start of
the struct, not the end. */
diff --git a/gcc/testsuite/g++.dg/ext/attrib52.C b/gcc/testsuite/g++.dg/ext/attrib52.C
new file mode 100644
index 0000000..e33556c
--- /dev/null
+++ b/gcc/testsuite/g++.dg/ext/attrib52.C
@@ -0,0 +1,15 @@
+// PR c++/66216
+// { dg-do compile { target c++11 } }
+// { dg-options "" }
+
+class CMymy
+{
+ unsigned char _a;
+ unsigned char _b;
+public:
+ constexpr CMymy() : _a(), _b() {}
+
+ constexpr CMymy(const CMymy &) = default;
+ CMymy &operator=(const CMymy &) = default;
+
+} __attribute__((aligned(2)));