55 lines · cpp
1// RUN: %clang_cc1 -verify -fsyntax-only -Wlarge-by-value-copy=100 %s2 3namespace rdar8548050 {4 5struct S100 {6 char x[100];7};8 9struct S101 {10 char x[101];11};12 13S100 f100(S100 s) { return s; }14 15S101 f101(S101 s) { return s; } // expected-warning {{return value of 'f101' is a large (101 bytes) pass-by-value object}} \16 // expected-warning {{'s' is a large (101 bytes) pass-by-value argument}}17 18void f101_no_param_name(S101) {} // expected-warning {{'' is a large (101 bytes) pass-by-value argument}}19 20// FIXME: Don't warn when when the return value is subject to (N)RVO.21 22template <typename T> T foo_template(T);23template <> S101 foo_template(S101) { return S101(); } // expected-warning {{return value of 'foo_template<rdar8548050::S101>' is a large}}24 // expected-warning@-1 {{'' is a large (101 bytes) pass-by-value argument}}25 26typedef int Arr[200];27void farr(Arr a) { }28 29struct NonPOD {30 char x[200];31 virtual void m();32};33 34NonPOD fNonPOD(NonPOD s) { return s; }35 36template <unsigned size>37struct TS {38 char x[size];39};40 41template <unsigned size>42void tf(TS<size> ts) {} // expected-warning {{ts' is a large (300 bytes) pass-by-value argument}}43 44void g() {45 TS<300> ts;46 tf<300>(ts); // expected-note {{instantiation}}47}48 49}50 51template<typename T> class DependentPOD {52 enum b { x };53 b foo() { return x; }54};55