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

1 files changed, 78 insertions, 0 deletions

diff --git a/clang/test/Analysis/uninit-vals-ps-region.m b/clang/test/Analysis/uninit-vals-ps-region.m
new file mode 100644
index 0000000..d613c71
--- /dev/null
+++ b/clang/test/Analysis/uninit-vals-ps-region.m
@@ -0,0 +1,78 @@
+// RUN: %clang_cc1 -analyze -analyzer-store=region -analyzer-checker=core,experimental.deadcode.IdempotentOperations -verify %s
+
+struct s {
+  int data;
+};
+
+struct s global;
+
+void g(int);
+
+void f4() {
+  int a;
+  if (global.data == 0)
+    a = 3;
+  if (global.data == 0) // When the true branch is feasible 'a = 3'.
+    g(a); // no-warning
+}
+
+
+// Test uninitialized value due to part of the structure being uninitialized.
+struct TestUninit { int x; int y; };
+struct TestUninit test_uninit_aux();
+void test_unit_aux2(int);
+void test_uninit_pos() {
+  struct TestUninit v1 = { 0, 0 };
+  struct TestUninit v2 = test_uninit_aux();
+  int z;
+  v1.y = z; // expected-warning{{Assigned value is garbage or undefined}}
+  test_unit_aux2(v2.x + v1.y);
+}
+void test_uninit_pos_2() {
+  struct TestUninit v1 = { 0, 0 };
+  struct TestUninit v2;
+  test_unit_aux2(v2.x + v1.y);  // expected-warning{{The left operand of '+' is a garbage value}}
+}
+void test_uninit_pos_3() {
+  struct TestUninit v1 = { 0, 0 };
+  struct TestUninit v2;
+  test_unit_aux2(v1.y + v2.x);  // expected-warning{{The right operand of '+' is a garbage value}}
+}
+
+void test_uninit_neg() {
+  struct TestUninit v1 = { 0, 0 };
+  struct TestUninit v2 = test_uninit_aux();
+  test_unit_aux2(v2.x + v1.y); // expected-warning{{The right operand to '+' is always 0}}
+}
+
+extern void test_uninit_struct_arg_aux(struct TestUninit arg);
+void test_uninit_struct_arg() {
+  struct TestUninit x;
+  test_uninit_struct_arg_aux(x); // expected-warning{{Passed-by-value struct argument contains uninitialized data (e.g., field: 'x')}}
+}
+
+@interface Foo
+- (void) passVal:(struct TestUninit)arg;
+@end
+void testFoo(Foo *o) {
+  struct TestUninit x;
+  [o passVal:x]; // expected-warning{{Passed-by-value struct argument contains uninitialized data (e.g., field: 'x')}}
+}
+
+// Test case from <rdar://problem/7780304>.  That shows an uninitialized value
+// being used in the LHS of a compound assignment.
+void rdar_7780304() {
+  typedef struct s_r7780304 { int x; } s_r7780304;
+  s_r7780304 b;
+  b.x |= 1; // expected-warning{{The left expression of the compound assignment is an uninitialized value. The computed value will also be garbage}}
+}
+
+
+// The flip side of PR10163 -- float arrays that are actually uninitialized
+// (The main test is in uninit-vals.m)
+void test_PR10163(float);
+void PR10163 (void) {
+  float x[2];
+  test_PR10163(x[1]); // expected-warning{{uninitialized value}}
+}
+