1 files changed, 41 insertions, 0 deletions
diff --git a/gcc/testsuite/gcc.dg/compare9.c b/gcc/testsuite/gcc.dg/compare9.c
new file mode 100644
index 000000000..02150cb1f
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/compare9.c
@@ -0,0 +1,41 @@
+/* Test for a bogus warning on comparison between signed and unsigned.
+   This was inspired by code in gcc.  This testcase is identical to
+   compare1.c except that we use -fshort-enums here and do not expect
+   a warning from case 4.  */
+
+/* { dg-do compile } */
+/* { dg-options "-fshort-enums -Wsign-compare" } */
+
+int tf = 1;
+
+/* This enumeration has an explicit negative value and is therefore signed.  */
+enum mm1 
+{
+  VOID, SI, DI, MAX = -1
+};
+
+/* This enumeration fits entirely in a signed int, but is unsigned anyway.  */
+enum mm2
+{
+  VOID2, SI2, DI2, MAX2
+};
+
+int f(enum mm1 x)
+{
+  return x == (tf?DI:SI); /* { dg-bogus "signed and unsigned" "case 1" } */
+}
+
+int g(enum mm1 x)
+{
+  return x == (tf?DI:-1); /* { dg-bogus "signed and unsigned" "case 2" } */
+}
+
+int h(enum mm2 x)
+{
+  return x == (tf?DI2:SI2); /* { dg-bogus "signed and unsigned" "case 3" } */
+}
+
+int i(enum mm2 x)
+{
+  return x == (tf?DI2:-1); /* { dg-bogus "signed and unsigned" "case 4" } */
+}