PR c++/69317 - [6 regression] wrong ABI version in -Wabi warnings

gcc/cp/ChangeLog:
2016-01-27  Martin Sebor  <msebor@redhat.com>

	PR c++/69317
	* mangle.c (mangle_decl): Reference the correct (saved) version
	of the ABI in -Wabi diagnostics.

gcc/testsuite/ChangeLog:
2016-01-27  Martin Sebor  <msebor@redhat.com>

	PR c++/69317
	* g++.dg/abi/Wabi-2-2.C: New test.
	* g++.dg/abi/Wabi-2-3.C: New test.
	* g++.dg/abi/Wabi-3-2.C: New test.
	* g++.dg/abi/Wabi-3-3.C: New test.


git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@232881 138bc75d-0d04-0410-961f-82ee72b054a4

7 files changed, 77 insertions, 3 deletions

diff --git a/gcc/cp/ChangeLog b/gcc/cp/ChangeLog
index 9f8d91a4500..6aa21763418 100644
--- a/gcc/cp/ChangeLog
+++ b/gcc/cp/ChangeLog
@@ -1,3 +1,9 @@
+2016-01-27  Martin Sebor  <msebor@redhat.com>
+
+	PR c++/69317
+	* mangle.c (mangle_decl): Reference the correct (saved) version
+	of the ABI in -Wabi diagnostics.
+
 2016-01-27  Marek Polacek  <polacek@redhat.com>
 
 	PR c++/69496
diff --git a/gcc/cp/mangle.c b/gcc/cp/mangle.c
index a8b9f37dd7a..4f1eea6335c 100644
--- a/gcc/cp/mangle.c
+++ b/gcc/cp/mangle.c
@@ -3657,13 +3657,13 @@ mangle_decl (const tree decl)
 	    warning_at (DECL_SOURCE_LOCATION (G.entity), OPT_Wabi,
 			"the mangled name of %qD changed between "
 			"-fabi-version=%d (%D) and -fabi-version=%d (%D)",
-			G.entity, warn_abi_version, id2,
-			flag_abi_version, id);
+			G.entity, save_ver, id2,
+			warn_abi_version, id);
 	  else
 	    warning_at (DECL_SOURCE_LOCATION (G.entity), OPT_Wabi,
 			"the mangled name of %qD changes between "
 			"-fabi-version=%d (%D) and -fabi-version=%d (%D)",
-			G.entity, flag_abi_version, id,
+			G.entity, save_ver, id,
 			warn_abi_version, id2);
 	}
 
diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog
index 8c7f4ddb371..ad977146f18 100644
--- a/gcc/testsuite/ChangeLog
+++ b/gcc/testsuite/ChangeLog
@@ -1,3 +1,11 @@
+2016-01-27  Martin Sebor  <msebor@redhat.com>
+
+	PR c++/69317
+	* g++.dg/abi/Wabi-2-2.C: New test.
+	* g++.dg/abi/Wabi-2-3.C: New test.
+	* g++.dg/abi/Wabi-3-2.C: New test.
+	* g++.dg/abi/Wabi-3-3.C: New test.
+
 2016-01-27  Richard Biener  <rguenther@suse.de>
 
 	PR tree-optimization/69166
diff --git a/gcc/testsuite/g++.dg/abi/Wabi-2-2.C b/gcc/testsuite/g++.dg/abi/Wabi-2-2.C
new file mode 100644
index 00000000000..d3a644b2d1c
--- /dev/null
+++ b/gcc/testsuite/g++.dg/abi/Wabi-2-2.C
@@ -0,0 +1,14 @@
+// Verify that no diagnostic is issued when the version specified
+// via -Wabi= matches the version specified by -fabi-version=.
+
+// { dg-options "-Werror -Wabi=2 -fabi-version=2" }
+// { dg-do compile }
+
+// The mangling of templates with a non-type template parameter
+// of reference type changed in ABI version 3: 
+extern int N;
+template <int &> struct S { };
+
+// Expect no diagnostic.
+void foo (S<N>) { }
+
diff --git a/gcc/testsuite/g++.dg/abi/Wabi-2-3.C b/gcc/testsuite/g++.dg/abi/Wabi-2-3.C
new file mode 100644
index 00000000000..5aadf5db7ea
--- /dev/null
+++ b/gcc/testsuite/g++.dg/abi/Wabi-2-3.C
@@ -0,0 +1,16 @@
+// PR c++/69317 - [6 regression] wrong ABI version in -Wabi warnings 
+// Exercise that the correct ABI versions are referenced in the -Wabi
+// diagnostic.  See also the equivalent Wabi-3-2.C test.
+
+// { dg-options "-Wabi=2 -fabi-version=3" }
+// { dg-do compile }
+
+// The mangling of templates with a non-type template parameter
+// of reference type changed in ABI version 3: 
+extern int N;
+template <int &> struct S { };
+
+// Expect the diagnostic to reference the ABI version specified via
+// -fabi-version=3 and the ABI version specified via -Wabi=2.
+void foo (S<N>) { }   // { dg-warning "the mangled name of .void foo\\(S<N>\\). changed between -fabi-version=3 \\(_Z3foo1SILZ1NEE\\) and -fabi-version=2 \\(_Z3foo1SIL_Z1NEE\\)" }
+
diff --git a/gcc/testsuite/g++.dg/abi/Wabi-3-2.C b/gcc/testsuite/g++.dg/abi/Wabi-3-2.C
new file mode 100644
index 00000000000..c65e3b6bd47
--- /dev/null
+++ b/gcc/testsuite/g++.dg/abi/Wabi-3-2.C
@@ -0,0 +1,16 @@
+// PR c++/69317 - [6 regression] wrong ABI version in -Wabi warnings 
+// Exercise that the correct ABI versions are referenced in the -Wabi
+// diagnostic.  See also the equivalent Wabi-2-3.C test.
+
+// { dg-options "-Wabi=3 -fabi-version=2" }
+// { dg-do compile }
+
+// The mangling of templates with a non-type template parameter
+// of reference type changed in ABI version 3: 
+extern int N;
+template <int &> struct S { };
+
+// Expect the diagnostic to reference the ABI version specified via
+// -fabi-version=2 and the ABI version specified via -Wabi=3.
+void foo (S<N>) { }   // { dg-warning "the mangled name of .void foo\\(S<N>\\). changed between -fabi-version=2 \\(_Z3foo1SIL_Z1NEE\\) and -fabi-version=3 \\(_Z3foo1SILZ1NEE\\)" }
+
diff --git a/gcc/testsuite/g++.dg/abi/Wabi-3-3.C b/gcc/testsuite/g++.dg/abi/Wabi-3-3.C
new file mode 100644
index 00000000000..443497121bd
--- /dev/null
+++ b/gcc/testsuite/g++.dg/abi/Wabi-3-3.C
@@ -0,0 +1,14 @@
+// Verify that no diagnostic is issued when the version specified
+// via -Wabi= matches the version specified by -fabi-version=.
+
+// { dg-options "-Werror -Wabi=3 -fabi-version=3" }
+// { dg-do compile }
+
+// The mangling of templates with a non-type template parameter
+// of reference type changed in ABI version 3: 
+extern int N;
+template <int &> struct S { };
+
+// Expect no diagnostic.
+void foo (S<N>) { }
+