add tests

Author: whentojump

clang/test/CoverageMapping/statement-expression.c

@@ -0,0 +1,36 @@
+// RUN: %clang_cc1 -mllvm -emptyline-comment-coverage=false -fprofile-instrument=clang -fcoverage-mapping -dump-coverage-mapping -emit-llvm-only -main-file-name statement-expression.c %s
+
+// No crash for the following examples, where GNU Statement Expression extension
+// could introduce region terminators (break, goto etc) before implicit
+// initializers in a struct or an array.
+// See https://github.com/llvm/llvm-project/pull/89564
+
+struct Foo {
+  int field1;
+  int field2;
+};
+
+void f1(void) {
+  struct Foo foo = {
+    .field1 = ({
+      switch (0) {
+      case 0:
+        break; // A region terminator
+      }
+      0;
+    }),
+    // ImplicitValueInitExpr introduced here for .field2
+  };
+}
+
+void f2(void) {
+  int arr[3] = {
+    [0] = ({
+        goto L0; // A region terminator
+L0:
+      0;
+    }),
+    // ImplicitValueInitExpr introduced here for subscript [1]
+    [2] = 0,
+  };
+}