From: mpolacek <mpolacek@138bc75d-0d04-0410-961f-82ee72b054a4>
Date: Tue, 15 Dec 2015 15:13:49 +0000 (+0000)
Subject: 	PR c/68907
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=75e722a6c6ddf62a6487b0d80db210b231d5cd8e;p=thirdparty%2Fgcc.git

	PR c/68907
	* c-typeck.c (build_atomic_assign): Set TREE_NO_WARNING on an
	artificial decl.

	* gcc.dg/pr68907.c: New test.


git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@231656 138bc75d-0d04-0410-961f-82ee72b054a4
---

diff --git a/gcc/c/ChangeLog b/gcc/c/ChangeLog
index 2ba94646e646..e61a2edd2b3e 100644
--- a/gcc/c/ChangeLog
+++ b/gcc/c/ChangeLog
@@ -1,3 +1,9 @@
+2015-12-15  Marek Polacek  <polacek@redhat.com>
+
+	PR c/68907
+	* c-typeck.c (build_atomic_assign): Set TREE_NO_WARNING on an
+	artificial decl.
+
 2015-12-08  David Malcolm  <dmalcolm@redhat.com>
 
 	* c-parser.c (c_parser_alignof_expression): Capture location of
diff --git a/gcc/c/c-typeck.c b/gcc/c/c-typeck.c
index b691072caa93..9d6c604ed909 100644
--- a/gcc/c/c-typeck.c
+++ b/gcc/c/c-typeck.c
@@ -3814,6 +3814,7 @@ build_atomic_assign (location_t loc, tree lhs, enum tree_code modifycode,
   newval = create_tmp_var_raw (nonatomic_lhs_type);
   newval_addr = build_unary_op (loc, ADDR_EXPR, newval, 0);
   TREE_ADDRESSABLE (newval) = 1;
+  TREE_NO_WARNING (newval) = 1;
 
   loop_decl = create_artificial_label (loc);
   loop_label = build1 (LABEL_EXPR, void_type_node, loop_decl);
diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog
index 633f8b2afe5b..17c1b661e198 100644
--- a/gcc/testsuite/ChangeLog
+++ b/gcc/testsuite/ChangeLog
@@ -1,3 +1,8 @@
+2015-12-15  Marek Polacek  <polacek@redhat.com>
+
+	PR c/68907
+	* gcc.dg/pr68907.c: New test.
+
 2015-12-15  Alessandro Fanfarillo  <fanfarillo.gcc@gmail.com>
 
 	* gfortran.dg/coarray_critical_1.f90: New.
diff --git a/gcc/testsuite/gcc.dg/pr68907.c b/gcc/testsuite/gcc.dg/pr68907.c
new file mode 100644
index 000000000000..de1c237b826f
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/pr68907.c
@@ -0,0 +1,14 @@
+/* PR c/60195 */
+/* { dg-do compile } */
+/* { dg-options "-std=c11 -Wpedantic -Wall" } */
+
+_Atomic int a;
+
+void
+fn (void)
+{
+  ++a;
+  a++;
+  --a;
+  a--;
+}