Add support for attributes on @implementations in Objective-C

We want to make objc_nonlazy_class apply to implementations, but ran into this.
There doesn't seem to be any reason that this isn't supported.

Differential revision: https://reviews.llvm.org/D60542

llvm-svn: 358200

1 files changed, 53 insertions, 0 deletions

diff --git a/clang/test/Parser/objc-implementation-attrs.m b/clang/test/Parser/objc-implementation-attrs.m
new file mode 100644
index 00000000000..76d9714140d
--- /dev/null
+++ b/clang/test/Parser/objc-implementation-attrs.m
@@ -0,0 +1,53 @@
+// RUN: %clang_cc1 -triple x86_64-apple-macosx10.14.0 -fsyntax-only -Wno-objc-root-class -verify %s
+
+@interface I1 @end
+
+// expected-warning@+1 {{'always_inline' attribute only applies to functions}}
+__attribute__((always_inline))
+@implementation I1 @end
+
+// expected-warning@+1 {{'always_inline' attribute only applies to functions}}
+__attribute__((always_inline))
+@implementation I1 (MyCat) @end
+
+// expected-warning@+1 {{'always_inline' attribute only applies to functions}}
+__attribute__((always_inline))
+// expected-warning@+1 {{cannot find interface declaration for 'I2'}}
+@implementation I2 @end
+
+// expected-error@+1 {{only applies to Objective-C interfaces}}
+__attribute__((objc_root_class))
+// expected-warning@+1 {{cannot find interface declaration for 'I3'}}
+@implementation I3 @end
+
+#define AVAIL_ATTR __attribute__((availability(macos, introduced=1000)))
+
+typedef int AVAIL_ATTR unavail_int; // expected-note {{marked as being introduced}}
+
+@interface I4 @end // expected-note {{annotate}}
+@implementation I4 {
+  unavail_int x; // expected-warning {{'unavail_int' is only available on macOS 1000 or newer}}
+}
+@end
+
+@interface I5 @end
+
+#pragma clang attribute push (AVAIL_ATTR, apply_to=objc_implementation)
+@implementation I5 {
+  unavail_int x;
+}
+@end
+#pragma clang attribute pop
+
+I5 *i5;
+
+// expected-error@+1 2 {{'annotate' attribute takes one argument}}
+#pragma clang attribute push (__attribute__((annotate)), apply_to=objc_implementation)
+@interface I6 @end
+@interface I6 (MyCat) @end
+@interface I6 () @end
+
+@implementation I6 @end // expected-note {{when applied to this declaration}}
+@implementation I6 (MyCat) @end // expected-note {{when applied to this declaration}}
+
+#pragma clang attribute pop