2 files changed, 134 insertions, 0 deletions
diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog
index bd28f18..cf4140d 100644
--- a/gcc/testsuite/ChangeLog
+++ b/gcc/testsuite/ChangeLog
@@ -1,3 +1,8 @@
+2010-05-09  Joseph Myers  <joseph@codesourcery.com>
+
+	PR c/4784
+	* gcc.dg/anon-struct-9.c: New test.
+
 2010-05-09  Richard Guenther  <rguenther@suse.de>
 
 	PR middle-end/44043
diff --git a/gcc/testsuite/gcc.dg/anon-struct-9.c b/gcc/testsuite/gcc.dg/anon-struct-9.c
new file mode 100644
index 0000000..2658ccb
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/anon-struct-9.c
@@ -0,0 +1,129 @@
+/* Test for diagnostics for duplicate member names in anonymous
+   structures and unions.  PR 4784.  */
+/* { dg-do compile } */
+/* { dg-options "" } */
+
+struct s1
+{
+  int x;
+  struct
+  {
+    int x; /* { dg-error "duplicate member" } */
+  };
+};
+
+struct s2
+{
+  struct
+  {
+    int a;
+    struct
+    {
+      int b;
+    };
+  };
+  struct
+  {
+    int b; /* { dg-error "duplicate member" } */
+  };
+};
+
+struct s3
+{
+  struct
+  {
+    int a;
+    struct
+    {
+      int b;
+    };
+  };
+  struct
+  {
+    int b; /* { dg-error "duplicate member" } */
+    int c;
+  };
+};
+
+struct s4
+{
+  int x;
+  struct
+  {
+    int x;
+  } y;
+};
+
+union u1
+{
+  int x;
+  union
+  {
+    int x; /* { dg-error "duplicate member" } */
+  };
+};
+
+union u2
+{
+  union
+  {
+    int a;
+    union
+    {
+      int b;
+    };
+  };
+  union
+  {
+    int b; /* { dg-error "duplicate member" } */
+  };
+};
+
+union u3
+{
+  union
+  {
+    int a;
+    union
+    {
+      int b;
+    };
+  };
+  union
+  {
+    int b; /* { dg-error "duplicate member" } */
+    int c;
+  };
+};
+
+union u4
+{
+  int x;
+  union
+  {
+    int x;
+  } y;
+};
+
+#define D10(x) int x##0; int x##1; int x##2; int x##3; int x##4; int x##5; int x##6; int x##7; int x##8; int x##9;
+#define D100(x) D10(x##0) D10(x##1) D10(x##2) D10(x##3) D10(x##4) D10(x##5) D10(x##6) D10(x##7) D10(x##8) D10(x##9)
+
+#define S10(x) struct { D100(x##0) }; struct { D100(x##1) }; struct { D100(x##2) }; struct { D100(x##3) }; struct { D100(x##4) }; struct { D100(x##5) }; struct { D100(x##6) }; struct { D100(x##7) }; struct { D100(x##8) }; struct { D100(x##9) };
+
+struct sbig
+{
+  S10(a)
+  S10(b)
+  S10(c)
+  S10(d)
+  S10(e)
+  S10(f)
+  S10(g)
+  S10(h)
+  S10(i)
+  S10(j)
+  struct
+  {
+    int a123; /* { dg-error "duplicate member" } */
+  };
+};