re PR c++/84488 (Incorrect "set but not used" warning for static_cast<Enum>(double))

	PR c++/84488
	* g++.dg/warn/Wunused-var-30.C: New test.

From-SVN: r257850

diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog
index 8eb50db74788ab2538429a641bb6d7425bb11e69..d6cedecf44ace889b3e4bdfee0190f2c5c366173 100644 (file)
--- a/gcc/testsuite/ChangeLog
+++ b/gcc/testsuite/ChangeLog
@@ -1,3 +1,8 @@
+2018-02-20  Jakub Jelinek  <jakub@redhat.com>
+
+       PR c++/84488
+       * g++.dg/warn/Wunused-var-30.C: New test.
+
 2018-02-20  Richard Sandiford  <richard.sandiford@linaro.org>
 
        PR tree-optimization/84419

diff --git a/gcc/testsuite/g++.dg/warn/Wunused-var-30.C b/gcc/testsuite/g++.dg/warn/Wunused-var-30.C
new file mode 100644 (file)
index 0000000..e95e120
--- /dev/null
+++ b/gcc/testsuite/g++.dg/warn/Wunused-var-30.C
@@ -0,0 +1,11 @@
+// PR c++/84488
+// { dg-do compile }
+// { dg-options "-Wunused-but-set-variable" }
+
+int
+foo ()
+{
+  enum E { A, B, C, D };
+  double r = 1.0;              // { dg-bogus "set but not used" }
+  return static_cast<E>(r);
+}