Merge branch 'master' of ssh://bitbucket.org/czan/honours

1 files changed, 71 insertions, 0 deletions

diff --git a/clang/test/Sema/offsetof.c b/clang/test/Sema/offsetof.c
new file mode 100644
index 0000000..46fb515
--- /dev/null
+++ b/clang/test/Sema/offsetof.c
@@ -0,0 +1,71 @@
+// RUN: %clang_cc1 -fsyntax-only -verify %s
+
+#define offsetof(TYPE, MEMBER) __builtin_offsetof (TYPE, MEMBER)
+
+typedef struct P { int i; float f; } PT;
+struct external_sun3_core
+{
+ unsigned c_regs; 
+
+  PT  X[100];
+  
+};
+
+void swap()
+{
+  int x;
+  x = offsetof(struct external_sun3_core, c_regs);
+  x = __builtin_offsetof(struct external_sun3_core, X[42].f);
+  
+  x = __builtin_offsetof(struct external_sun3_core, X[42].f2);  // expected-error {{no member named 'f2'}}
+  x = __builtin_offsetof(int, X[42].f2);  // expected-error {{offsetof requires struct}}
+  
+  int a[__builtin_offsetof(struct external_sun3_core, X) == 4 ? 1 : -1];
+  int b[__builtin_offsetof(struct external_sun3_core, X[42]) == 340 ? 1 : -1];
+  int c[__builtin_offsetof(struct external_sun3_core, X[42].f2) == 344 ? 1 : -1];  // expected-error {{no member named 'f2'}}
+}    
+
+extern int f();
+
+struct s1 { int a; }; 
+int v1 = offsetof (struct s1, a) == 0 ? 0 : f();
+
+struct s2 { int a; }; 
+int v2 = (int)(&((struct s2 *) 0)->a) == 0 ? 0 : f();
+
+struct s3 { int a; }; 
+int v3 = __builtin_offsetof(struct s3, a) == 0 ? 0 : f();
+
+// PR3396
+struct sockaddr_un {
+ unsigned char sun_len;
+ char sun_path[104];
+};
+int a(int len) {
+int a[__builtin_offsetof(struct sockaddr_un, sun_path[len+1])];
+}
+
+// PR4079
+union x {struct {int x;};};
+int x[__builtin_offsetof(union x, x)];
+
+// rdar://problem/7222956
+struct incomplete; // expected-note 2 {{forward declaration of 'struct incomplete'}}
+int test1[__builtin_offsetof(struct incomplete, foo)]; // expected-error {{offsetof of incomplete type 'struct incomplete'}}
+
+int test2[__builtin_offsetof(struct incomplete[10], [4].foo)]; // expected-error {{array has incomplete element type 'struct incomplete'}}
+
+// Bitfields
+struct has_bitfields {
+  int i : 7;
+  int j : 12; // expected-note{{bit-field is declared here}}
+};
+
+int test3 = __builtin_offsetof(struct has_bitfields, j); // expected-error{{cannot compute offset of bit-field 'j'}}
+
+typedef struct Array { int array[1]; } Array;
+int test4 = __builtin_offsetof(Array, array);
+
+int test5() {
+  return __builtin_offsetof(Array, array[*(int*)0]); // expected-warning{{indirection of non-volatile null pointer}} expected-note{{__builtin_trap}}
+}