Add the clang library to the repo (with some of my changes, too).

1 files changed, 110 insertions, 0 deletions

diff --git a/clang/test/Analysis/unused-ivars.m b/clang/test/Analysis/unused-ivars.m
new file mode 100644
index 0000000..8941840
--- /dev/null
+++ b/clang/test/Analysis/unused-ivars.m
@@ -0,0 +1,110 @@
+// RUN: %clang_cc1 -fblocks -analyze -analyzer-checker=osx.cocoa.UnusedIvars -verify -Wno-objc-root-class %s
+
+//===--- BEGIN: Delta-debugging reduced headers. --------------------------===//
+
+@protocol NSObject
+- (id)retain;
+- (oneway void)release;
+@end
+@interface NSObject <NSObject> {}
+- (id)init;
++ (id)alloc;
+@end
+
+//===--- END: Delta-debugging reduced headers. ----------------------------===//
+
+// This test case tests the basic functionality of the unused ivar test.
+@interface TestA {
+@private
+  int x; // expected-warning {{Instance variable 'x' in class 'TestA' is never used}}
+}
+@end
+@implementation TestA @end
+
+// This test case tests whether the unused ivar check handles blocks that
+// reference an instance variable. (<rdar://problem/7075531>)
+@interface TestB : NSObject {
+@private
+  id _ivar; // no-warning
+}
+@property (readwrite,retain) id ivar;
+@end
+
+@implementation TestB
+- (id)ivar {
+  __attribute__((__blocks__(byref))) id value = ((void*)0);
+  void (^b)() = ^{ value = _ivar; };
+  b();
+  return value;
+}
+
+- (void)setIvar:(id)newValue {
+  void (^b)() = ^{ [_ivar release]; _ivar = [newValue retain]; };
+  b();
+}
+@end
+
+//===----------------------------------------------------------------------===//
+// <rdar://problem/6260004> Detect that ivar is in use, if used in category 
+//  in the same file as the implementation
+//===----------------------------------------------------------------------===//
+
+@protocol Protocol6260004
+- (id) getId;
+@end
+
+@interface RDar6260004 {
+@private
+  id x; // no-warning
+}
+@end
+@implementation RDar6260004 @end
+@implementation RDar6260004 (Protocol6260004)
+- (id) getId {
+  return x;
+}
+@end
+
+//===----------------------------------------------------------------------===//
+// <rdar://problem/7254495> - ivars referenced by lexically nested functions
+//  should not be flagged as unused
+//===----------------------------------------------------------------------===//
+
+@interface RDar7254495 {
+@private
+  int x; // no-warning
+}
+@end
+
+@implementation RDar7254495
+int radar_7254495(RDar7254495 *a) {
+  return a->x;
+}
+@end
+
+//===----------------------------------------------------------------------===//
+// <rdar://problem/7353683> - consult attribute((unused)) to silence warnings
+// about unused instance variables
+//===----------------------------------------------------------------------===//
+
+@interface RDar7353683 {
+@private
+  id x __attribute__((unused));
+}
+@end
+
+@implementation RDar7353683
+@end
+//===----------------------------------------------------------------------===//
+// <rdar://problem/8481311> Unused bitfield ivars trigger cause weird
+// diagnostic: "Instance variable '' in class..."
+//===----------------------------------------------------------------------===//
+
+@interface RDar8481311 {
+@private
+    unsigned bitfield:1; // expected-warning {{Instance variable 'bitfield' in class 'RDar8481311' is never used}}
+}
+@end
+
+@implementation RDar8481311
+@end