[Sema] Emit -Winteger-overflow for arguments in function calls, ObjC messages.

rdar://problem/35539384

Reviewers: ahatanak, nicholas, rsmith, jkorous-apple

Reviewed By: jkorous-apple

Subscribers: cfe-commits, jkorous-apple

Differential Revision: https://reviews.llvm.org/D42938

llvm-svn: 328671

1 files changed, 15 insertions, 0 deletions

diff --git a/clang/test/SemaCXX/integer-overflow.cpp b/clang/test/SemaCXX/integer-overflow.cpp
index 6abc9561449..956ec157b3f 100644
--- a/clang/test/SemaCXX/integer-overflow.cpp
+++ b/clang/test/SemaCXX/integer-overflow.cpp
@@ -169,3 +169,18 @@ uint64_t check_integer_overflows(int i) { //expected-note {{declared here}}
 // expected-warning@+1 2{{overflow in expression; result is 536870912 with type 'int'}}
   return ((4608 * 1024 * 1024) + ((uint64_t)(4608 * 1024 * 1024)));
 }
+
+void check_integer_overflows_in_function_calls() {
+// expected-warning@+1 {{overflow in expression; result is 536870912 with type 'int'}}
+  (void)f0(4608 * 1024 * 1024);
+
+// expected-warning@+1 {{overflow in expression; result is 536870912 with type 'int'}}
+  uint64_t x = f0(4608 * 1024 * 1024);
+
+// expected-warning@+2 {{overflow in expression; result is 536870912 with type 'int'}}
+  uint64_t (*f0_ptr)(uint64_t) = &f0;
+  (void)(*f0_ptr)(4608 * 1024 * 1024);
+
+// expected-warning@+1 {{overflow in expression; result is 536870912 with type 'int'}}
+  (void)f2(0, f0(4608 * 1024 * 1024));
+}