1 files changed, 47 insertions, 0 deletions
diff --git a/test/Sema/warn-unreachable.c b/test/Sema/warn-unreachable.c
index 34e0296a20490..440aa0a5a174c 100644
--- a/test/Sema/warn-unreachable.c
+++ b/test/Sema/warn-unreachable.c
@@ -451,3 +451,50 @@ void unaryOpFixitCastSubExpr(int x) {
             // CHECK: fix-it:"{{.*}}":{[[@LINE-2]]:15-[[@LINE-2]]:15}:")"
   unaryOpFixitCastSubExpr(x); // expected-warning {{code will never be executed}}
 }
+
+#define false 0
+#define true 1
+
+void testTrueFalseMacros() {
+  if (false) // expected-note {{silence by adding parentheses to mark code as explicitly dead}}
+    testTrueFalseMacros(); // expected-warning {{code will never be executed}}
+  if (!true) // expected-note {{silence by adding parentheses to mark code as explicitly dead}}
+    testTrueFalseMacros(); // expected-warning {{code will never be executed}}
+}
+
+int pr13910_foo(int x) {
+  if (x == 1)
+    return 0;
+  else
+    return x;
+  __builtin_unreachable(); // expected no warning
+}
+
+int pr13910_bar(int x) {
+  switch (x) {
+  default:
+    return x + 1;
+  }
+  pr13910_foo(x); // expected-warning {{code will never be executed}}
+}
+
+int pr13910_bar2(int x) {
+  if (x == 1)
+    return 0;
+  else
+    return x;
+  pr13910_foo(x);          // expected-warning {{code will never be executed}}
+  __builtin_unreachable(); // expected no warning
+  pr13910_foo(x);          // expected-warning {{code will never be executed}}
+}
+
+void pr13910_noreturn() {
+  raze();
+  __builtin_unreachable(); // expected no warning
+}
+
+void pr13910_assert() {
+  myassert(0 && "unreachable");
+  return;
+  __builtin_unreachable(); // expected no warning
+}