1 files changed, 85 insertions, 0 deletions
diff --git a/test/Misc/backend-stack-frame-diagnostics.cpp b/test/Misc/backend-stack-frame-diagnostics.cpp
new file mode 100644
index 0000000..1d865e7
--- /dev/null
+++ b/test/Misc/backend-stack-frame-diagnostics.cpp
@@ -0,0 +1,85 @@
+// REQUIRES: x86-registered-target
+// RUN: %clang -target i386-apple-darwin -std=c++11 -fblocks -Wframe-larger-than=70 -Xclang -verify -o /dev/null -c %s
+// RUN: %clang -target i386-apple-darwin -std=c++11 -fblocks -Wframe-larger-than=70 -Xclang -verify -o /dev/null -c %s -DIS_SYSHEADER
+
+// Test that:
+//  * The driver passes the option through to the backend.
+//  * The frontend diagnostic handler 'demangles' and resolves the correct function definition.
+
+// Test that link invocations don't emit an "argument unused during compilation" diagnostic.
+// RUN: touch %t.o
+// RUN: %clang -Werror -Wframe-larger-than=0 %t.o -###  2>&1 | not grep ' error: '
+
+// TODO: Support rich backend diagnostics for Objective-C methods.
+
+// Backend diagnostics aren't suppressed in system headers because such results
+// are significant and actionable.
+#ifdef IS_HEADER
+
+#ifdef IS_SYSHEADER
+#pragma clang system_header
+#endif
+
+extern void doIt(char *);
+
+void frameSizeWarning(int, int) {}
+
+void frameSizeWarning();
+
+void frameSizeWarning() { // expected-warning-re {{stack frame size of {{[0-9]+}} bytes in function 'frameSizeWarning'}}
+  char buffer[80];
+  doIt(buffer);
+}
+
+void frameSizeWarning();
+
+void frameSizeWarning(int) {}
+
+#pragma GCC diagnostic push
+#pragma GCC diagnostic ignored "-Wframe-larger-than="
+void frameSizeWarningIgnored() {
+  char buffer[80];
+  doIt(buffer);
+}
+#pragma GCC diagnostic pop
+
+#pragma GCC diagnostic push
+#ifndef IS_SYSHEADER
+// expected-warning@+2 {{unknown warning group '-Wframe-larger-than'}}
+#endif
+#pragma GCC diagnostic ignored "-Wframe-larger-than"
+#pragma GCC diagnostic pop
+
+void frameSizeLocalClassWarning() {
+  struct S {
+    S() { // expected-warning-re {{stack frame size of {{[0-9]+}} bytes in function 'frameSizeLocalClassWarning()::S::S'}}
+      char buffer[80];
+      doIt(buffer);
+    }
+  };
+  S();
+}
+
+void frameSizeLambdaWarning() {
+  auto fn =
+      []() { // expected-warning-re {{stack frame size of {{[0-9]+}} bytes in lambda expression}}
+    char buffer[80];
+    doIt(buffer);
+  };
+  fn();
+}
+
+void frameSizeBlocksWarning() {
+  auto fn =
+      ^() { // expected-warning-re {{stack frame size of {{[0-9]+}} bytes in block literal}}
+    char buffer[80];
+    doIt(buffer);
+  };
+  fn();
+}
+
+#else
+
+#define IS_HEADER
+#include __FILE__
+#endif