-Rename -Wargument-larger-than -> -Wlarge-by-value-copy
-Improve the diagnostic message
-Add some comments
Suggestions by Chris.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@119594 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/test/SemaCXX/warn-large-by-value-copy.cpp b/test/SemaCXX/warn-large-by-value-copy.cpp
new file mode 100644
index 0000000..39dbd76
--- /dev/null
+++ b/test/SemaCXX/warn-large-by-value-copy.cpp
@@ -0,0 +1,42 @@
+// RUN: %clang_cc1 -verify -fsyntax-only -Wlarge-by-value-copy=100 %s
+
+// rdar://8548050
+namespace rdar8548050 {
+
+struct S100 {
+ char x[100];
+};
+
+struct S101 {
+ char x[101];
+};
+
+S100 f100(S100 s) { return s; }
+
+S101 f101(S101 s) { return s; } // expected-warning {{return value of 'f101' is a large (101 bytes) pass-by-value object}} \
+ // expected-warning {{'s' is a large (101 bytes) pass-by-value argument}}
+
+typedef int Arr[200];
+void farr(Arr a) { }
+
+struct NonPOD {
+ char x[200];
+ virtual void m();
+};
+
+NonPOD fNonPOD(NonPOD s) { return s; }
+
+template <unsigned size>
+struct TS {
+ char x[size];
+};
+
+template <unsigned size>
+void tf(TS<size> ts) {} // expected-warning {{ts' is a large (300 bytes) pass-by-value argument}}
+
+void g() {
+ TS<300> ts;
+ tf<300>(ts); // expected-note {{instantiation}}
+}
+
+}