--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/clang/test/PCH/blocks.h	Thu Feb 13 15:10:13 2020 +0900
@@ -0,0 +1,14 @@
+// Header for PCH test blocks.c
+
+int call_block(int (^bl)(int x, int y), int a, int b) {
+  return bl(a, b);
+}
+
+int add(int a, int b) {
+  return call_block(^(int x, int y) { return x + y; }, a, b);
+}
+
+int scaled_add(int a, int b, int s) {
+  __block int scale = s;
+  return call_block(^(int x, int y) { return x*scale + y; }, a, b);
+}