Bring llvm.annotation* intrinsics support back to where it was in llvm-gcc: can
annotate global, local variables, struct fields, or arbitrary statements (using
the __builtin_annotation), rdar://8037476.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@139423 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/test/CodeGen/annotations-field.c b/test/CodeGen/annotations-field.c
new file mode 100644
index 0000000..6b44367
--- /dev/null
+++ b/test/CodeGen/annotations-field.c
@@ -0,0 +1,27 @@
+// RUN: %clang_cc1 -emit-llvm -o - %s | FileCheck %s
+// END.
+
+// CHECK: private unnamed_addr constant [8 x i8] c"v_ann_{{.}}\00", section "llvm.metadata"
+// CHECK: private unnamed_addr constant [8 x i8] c"v_ann_{{.}}\00", section "llvm.metadata"
+
+struct foo {
+    int v __attribute__((annotate("v_ann_0"))) __attribute__((annotate("v_ann_1")));
+};
+
+static struct foo gf;
+
+int main(int argc, char **argv) {
+    struct foo f;
+    f.v = argc;
+// CHECK: getelementptr inbounds %struct.foo* %f, i32 0, i32 0
+// CHECK-NEXT: bitcast i32* {{.*}} to i8*
+// CHECK-NEXT: call i8* @llvm.ptr.annotation.p0i8({{.*}}str{{.*}}str{{.*}}i32 8)
+// CHECK-NEXT: bitcast i8* {{.*}} to i32*
+// CHECK-NEXT: bitcast i32* {{.*}} to i8*
+// CHECK-NEXT: call i8* @llvm.ptr.annotation.p0i8({{.*}}str{{.*}}str{{.*}}i32 8)
+// CHECK-NEXT: bitcast i8* {{.*}} to i32*
+    gf.v = argc;
+// CHECK: bitcast i32* getelementptr inbounds (%struct.foo* @gf, i32 0, i32 0) to i8*
+// CHECK-NEXT: call i8* @llvm.ptr.annotation.p0i8({{.*}}str{{.*}}str{{.*}}i32 8)
+    return 0;
+}