Properly use TYPE_MAIN_VARIANT in warn_types_mismatch.

2019-11-28  Martin Liska  <mliska@suse.cz>

	PR lto/92609
	* ipa-devirt.c (warn_types_mismatch): Use TYPE_MAIN_VARIANT
	consistently.
2019-11-28  Martin Liska  <mliska@suse.cz>

	PR lto/92609
	* g++.dg/lto/pr92609_0.C: New test.
	* g++.dg/lto/pr92609_1.C: New test.


git-svn-id: https://gcc.gnu.org/svn/gcc/trunk@278819 138bc75d-0d04-0410-961f-82ee72b054a4

5 files changed, 171 insertions, 12 deletions

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 50b2278b272..99cdce7ab3f 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,9 @@
+2019-11-28  Martin Liska  <mliska@suse.cz>
+
+	PR lto/92609
+	* ipa-devirt.c (warn_types_mismatch): Use TYPE_MAIN_VARIANT
+	consistently.
+
 2019-11-28  Jan Hubicka  <hubicka@ucw.cz>
 
 	* ipa-inline.c (want_early_inline_function_p): Remove leftover optimize
diff --git a/gcc/ipa-devirt.c b/gcc/ipa-devirt.c
index c158d3c968d..0b2475ca292 100644
--- a/gcc/ipa-devirt.c
+++ b/gcc/ipa-devirt.c
@@ -986,21 +986,24 @@ warn_types_mismatch (tree t1, tree t2, location_t loc1, location_t loc2)
 
   /* It is a quite common bug to reference anonymous namespace type in
      non-anonymous namespace class.  */
-  if ((type_with_linkage_p (TYPE_MAIN_VARIANT (t1))
-       && type_in_anonymous_namespace_p (TYPE_MAIN_VARIANT (t1)))
-      || (type_with_linkage_p (TYPE_MAIN_VARIANT (t2))
-	  && type_in_anonymous_namespace_p (TYPE_MAIN_VARIANT (t2))))
+  tree mt1 = TYPE_MAIN_VARIANT (t1);
+  tree mt2 = TYPE_MAIN_VARIANT (t2);
+  if ((type_with_linkage_p (mt1)
+       && type_in_anonymous_namespace_p (mt1))
+      || (type_with_linkage_p (mt2)
+	  && type_in_anonymous_namespace_p (mt2)))
     {
-      if (!type_with_linkage_p (TYPE_MAIN_VARIANT (t1))
-	  || !type_in_anonymous_namespace_p (TYPE_MAIN_VARIANT (t1)))
+      if (!type_with_linkage_p (mt1)
+	  || !type_in_anonymous_namespace_p (mt1))
 	{
 	  std::swap (t1, t2);
+	  std::swap (mt1, mt2);
 	  std::swap (loc_t1, loc_t2);
 	}
-      gcc_assert (TYPE_NAME (t1)
-		  && TREE_CODE (TYPE_NAME (t1)) == TYPE_DECL);
-      tree n1 = TYPE_NAME (t1);
-      tree n2 = TYPE_NAME (t2) ? TYPE_NAME (t2) : NULL;
+      gcc_assert (TYPE_NAME (mt1)
+		  && TREE_CODE (TYPE_NAME (mt1)) == TYPE_DECL);
+      tree n1 = TYPE_NAME (mt1);
+      tree n2 = TYPE_NAME (mt2) ? TYPE_NAME (mt2) : NULL;
 
       if (TREE_CODE (n1) == TYPE_DECL)
 	n1 = DECL_NAME (n1);
@@ -1023,8 +1026,6 @@ warn_types_mismatch (tree t1, tree t2, location_t loc1, location_t loc2)
 	        "the incompatible type defined in another translation unit");
       return;
     }
-  tree mt1 = TYPE_MAIN_VARIANT (t1);
-  tree mt2 = TYPE_MAIN_VARIANT (t2);
   /* If types have mangled ODR names and they are different, it is most
      informative to output those.
      This also covers types defined in different namespaces.  */
diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog
index ac1a4be9888..e800a0fa1c2 100644
--- a/gcc/testsuite/ChangeLog
+++ b/gcc/testsuite/ChangeLog
@@ -1,3 +1,9 @@
+2019-11-28  Martin Liska  <mliska@suse.cz>
+
+	PR lto/92609
+	* g++.dg/lto/pr92609_0.C: New test.
+	* g++.dg/lto/pr92609_1.C: New test.
+
 2019-11-28  Iain Sandoe  <iain@sandoe.co.uk>
 
 	* gcc.target/i386/pr32219-2.c: Adjust scan-assembler entries
diff --git a/gcc/testsuite/g++.dg/lto/pr92609_0.C b/gcc/testsuite/g++.dg/lto/pr92609_0.C
new file mode 100644
index 00000000000..3cce1811d1e
--- /dev/null
+++ b/gcc/testsuite/g++.dg/lto/pr92609_0.C
@@ -0,0 +1,88 @@
+// PR lto/92609
+// { dg-lto-do link }
+// { dg-lto-options { { -fPIC -flto } } }
+// { dg-require-effective-target shared }
+// { dg-require-effective-target fpic }
+// { dg-extra-ld-options "-shared" }
+
+namespace std {
+inline namespace __cxx11 {}
+template < typename _Default > struct __detector { using type = _Default; };
+template < typename _Default, template < typename > class >
+using __detected_or = __detector< _Default >;
+template < typename _Default, template < typename > class _Op >
+using __detected_or_t = typename __detected_or< _Default, _Op >::type;
+template < typename > class allocator;
+template < class > struct char_traits;
+namespace __cxx11 {
+template < typename _CharT, typename = char_traits< _CharT >,
+           typename = allocator< _CharT > >
+class basic_string;
+}
+struct __allocator_traits_base {
+  template < typename _Tp > using __pointer = typename _Tp::pointer;
+};
+struct allocator_traits : __allocator_traits_base {
+  using pointer = __detected_or_t< char *, __pointer >;
+};
+} // std
+struct rebind {
+  typedef std::allocator_traits other;
+};
+namespace std {
+namespace __cxx11 {
+template < typename, typename, typename > class basic_string {
+  struct _Alloc_hider {
+    rebind::other::pointer _M_p;
+  } _M_dataplus;
+  unsigned long _M_string_length;
+  enum { _S_local_capacity = 15 };
+  union {
+    char _M_local_buf[_S_local_capacity + 1];
+    unsigned long _M_allocated_capacity;
+  };
+};
+} // __cxx11
+template < typename _Tp > class __uniq_ptr_impl {
+  template < typename _Up > struct _Ptr { using type = _Up *; };
+
+public:
+  using pointer = typename _Ptr< _Tp >::type;
+};
+template < typename _Tp > class unique_ptr {
+public:
+  using pointer = typename __uniq_ptr_impl< _Tp >::pointer;
+  unique_ptr(pointer);
+};
+} // std
+class wxRefCounter;
+class wxObject {
+  virtual wxRefCounter CreateRefData();
+  wxRefCounter *m_refData;
+};
+class wxGDIObject : wxObject {};
+class wxFontBase : wxGDIObject {};
+class wxFont : wxFontBase {};
+class VisualTool {
+protected:
+  VisualTool(int *, int *);
+};
+class OpenGLText;
+class VisualToolCross : VisualTool {
+  std::unique_ptr< OpenGLText > gl_text;
+  VisualToolCross();
+};
+class OpenGLText { // { dg-lto-warning "7: type 'struct OpenGLText' violates the C\\+\\+ One Definition Rule" }
+  float r, g, b, a;
+  int fontSize;
+  bool fontBold;
+  bool fontItalics;
+  std::basic_string< char > fontFace;
+  wxFont font;
+  int glyphs;
+};
+int VisualToolCross_parent;
+int VisualToolCross_context;
+VisualToolCross::VisualToolCross()
+    : VisualTool(&VisualToolCross_parent, &VisualToolCross_context),
+      gl_text(0) {}
diff --git a/gcc/testsuite/g++.dg/lto/pr92609_1.C b/gcc/testsuite/g++.dg/lto/pr92609_1.C
new file mode 100644
index 00000000000..4c65a6a4600
--- /dev/null
+++ b/gcc/testsuite/g++.dg/lto/pr92609_1.C
@@ -0,0 +1,58 @@
+namespace std {
+inline namespace __cxx11 {}
+template < typename _Default > struct __detector { using type = _Default; };
+template < typename _Default, template < typename > class >
+using __detected_or = __detector< _Default >;
+template < typename _Default, template < typename > class _Op >
+using __detected_or_t = typename __detected_or< _Default, _Op >::type;
+template < typename > class allocator;
+template < class > struct char_traits;
+namespace __cxx11 {
+template < typename _CharT, typename = char_traits< _CharT >,
+           typename = allocator< _CharT > >
+class basic_string;
+}
+struct __allocator_traits_base {
+  template < typename _Tp > using __pointer = typename _Tp::pointer;
+};
+struct allocator_traits : __allocator_traits_base {
+  using pointer = __detected_or_t< char *, __pointer >;
+};
+namespace __cxx11 {
+template < typename, typename, typename > class basic_string {
+  struct _Alloc_hider {
+    allocator_traits::pointer _M_p;
+  } _M_dataplus;
+  unsigned long _M_string_length;
+  enum { _S_local_capacity = 15 };
+  union {
+    char _M_local_buf[_S_local_capacity + 1];
+    unsigned long _M_allocated_capacity;
+  };
+};
+} // __cxx11
+} // std
+class wxRefCounter;
+class wxObject {
+  virtual int GetClassInfo();
+  wxRefCounter *m_refData;
+};
+class wxGDIObject : wxObject {};
+class wxFontBase : wxGDIObject {};
+class wxFont : wxFontBase {};
+template < class > class map {};
+namespace {
+struct OpenGLTextGlyph;
+}
+typedef map< OpenGLTextGlyph > glyphMap;
+class OpenGLText {
+  float r, g, b, a;
+  int fontSize;
+  bool fontBold;
+  bool fontItalics;
+  std::basic_string< char > fontFace;
+  wxFont font;
+  glyphMap glyphs;
+  OpenGLText();
+};
+OpenGLText::OpenGLText() {}