From: Andrew Pinski <apin...@marvell.com>
This testcase used to fail before GCC 6.4.0 due to the wrong
type being used for auto when used with bitfields, the C++
front-end was using the "bitfield" type rather than the
underlaying type.
Committed the testcase after a quick check.
PR c++/71792
gcc/testsuite/ChangeLog:
* g++.dg/torture/pr71792.C: New test.
---
gcc/testsuite/g++.dg/torture/pr71792.C | 42 ++++++++++++++++++++++++++
1 file changed, 42 insertions(+)
create mode 100644 gcc/testsuite/g++.dg/torture/pr71792.C
diff --git a/gcc/testsuite/g++.dg/torture/pr71792.C
b/gcc/testsuite/g++.dg/torture/pr71792.C
new file mode 100644
index 00000000000..607774d755d
--- /dev/null
+++ b/gcc/testsuite/g++.dg/torture/pr71792.C
@@ -0,0 +1,42 @@
+// { dg-do run { target c++11 } }
+// PR C++/71792
+
+class some_class
+{
+public:
+ unsigned int np : 4;
+ unsigned int nc : 8;
+ unsigned int nc0 : 1;
+};
+
+template<bool what>
+static void test_bug (const some_class &mp) {
+ if (what) {
+ int t = 0;
+ for (auto i = mp.nc0; i < mp.nc; i++) {
+ if (t != i) __builtin_abort ();
+ t++;
+ }
+ }
+}
+
+static void test_ok (const some_class &mp) {
+ int t = 0;
+ for (auto i = mp.nc0; i < mp.nc; i++) {
+ if (t != i) __builtin_abort ();
+ t++;
+ }
+}
+
+int main ()
+{
+ some_class mp;
+ mp.nc0 = 0;
+ mp.nc = 9;
+ mp.np = 3;
+
+ test_bug<true> (mp);
+ test_ok (mp);
+
+ return 0;
+}
--
2.17.1
