From: jakub <jakub@138bc75d-0d04-0410-961f-82ee72b054a4>
Date: Thu, 21 Feb 2019 00:08:59 +0000 (+0000)
Subject: 	PR c++/89405
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=02dc60280b099ffe71826ab309c6d81aacbf79ac;p=thirdparty%2Fgcc.git

	PR c++/89405
	* decl.c (maybe_commonize_var): When clearing TREE_PUBLIC and
	DECL_COMMON, set DECL_INTERFACE_KNOWN.

	* g++.dg/cpp1z/inline-var5.C: New test.


git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@269058 138bc75d-0d04-0410-961f-82ee72b054a4
---

diff --git a/gcc/cp/ChangeLog b/gcc/cp/ChangeLog
index fabcb1a5b4c1..58df2b5953cb 100644
--- a/gcc/cp/ChangeLog
+++ b/gcc/cp/ChangeLog
@@ -1,5 +1,9 @@
 2019-02-20  Jakub Jelinek  <jakub@redhat.com>
 
+	PR c++/89405
+	* decl.c (maybe_commonize_var): When clearing TREE_PUBLIC and
+	DECL_COMMON, set DECL_INTERFACE_KNOWN.
+
 	PR c++/89336
 	* constexpr.c (cxx_eval_store_expression): Diagnose changing of active
 	union member for -std=c++17 and earlier.
diff --git a/gcc/cp/decl.c b/gcc/cp/decl.c
index c164975318b6..acde010e3e52 100644
--- a/gcc/cp/decl.c
+++ b/gcc/cp/decl.c
@@ -5634,6 +5634,7 @@ maybe_commonize_var (tree decl)
 		 be merged.  */
 	      TREE_PUBLIC (decl) = 0;
 	      DECL_COMMON (decl) = 0;
+	      DECL_INTERFACE_KNOWN (decl) = 1;
 	      const char *msg;
 	      if (DECL_INLINE_VAR_P (decl))
 		msg = G_("sorry: semantics of inline variable "
diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog
index 32a68cc71f4e..d8d6ef94287b 100644
--- a/gcc/testsuite/ChangeLog
+++ b/gcc/testsuite/ChangeLog
@@ -1,5 +1,8 @@
 2019-02-20  Jakub Jelinek  <jakub@redhat.com>
 
+	PR c++/89405
+	* g++.dg/cpp1z/inline-var5.C: New test.
+
 	PR middle-end/89412
 	* gcc.c-torture/compile/pr89412.c: New test.
 
diff --git a/gcc/testsuite/g++.dg/cpp1z/inline-var5.C b/gcc/testsuite/g++.dg/cpp1z/inline-var5.C
new file mode 100644
index 000000000000..111c9788e848
--- /dev/null
+++ b/gcc/testsuite/g++.dg/cpp1z/inline-var5.C
@@ -0,0 +1,11 @@
+// PR c++/89405
+// { dg-do compile { target c++17 } }
+// { dg-options "-fno-weak" }
+
+template <int N>
+struct S
+{
+  static constexpr int a = N;	// { dg-warning "semantics of inline variable" }
+};				// { dg-message "you can work around this" "" { target *-*-* } .-1 }
+
+const int *x = &S<0>::a;