xref: /llvm-project/clang/test/CodeGenCXX/empty-nontrivially-copyable.cpp (revision 1b9a6e58a8b831193c9e5e733f881aabe0d2d06b)
1 // RUN: %clang_cc1 -triple armv7-apple-ios -x c++ -emit-llvm -o - %s | FileCheck %s
2 // RUN: %clang_cc1 -triple arm64-apple-ios -x c++ -emit-llvm -o - %s | FileCheck %s
3 
4 // According to the Itanium ABI (3.1.1), types with non-trivial copy
5 // constructors passed by value should be passed indirectly, with the caller
6 // creating a temporary.
7 
8 struct Empty;
9 
10 struct Empty {
11   Empty(const Empty &e);
12   bool check();
13 };
14 
foo(Empty e)15 bool foo(Empty e) {
16 // CHECK: @_Z3foo5Empty(ptr noundef %e)
17 // CHECK: call {{.*}} @_ZN5Empty5checkEv(ptr {{[^,]*}} %e)
18   return e.check();
19 }
20 
caller(Empty & e)21 void caller(Empty &e) {
22 // CHECK: @_Z6callerR5Empty(ptr noundef nonnull align {{[0-9]+}} dereferenceable({{[0-9]+}}) %e)
23 // CHECK: call {{.*}} @_ZN5EmptyC1ERKS_(ptr {{[^,]*}} [[NEWTMP:%.*]], ptr
24 // CHECK: call {{.*}} @_Z3foo5Empty(ptr noundef [[NEWTMP]])
25   foo(e);
26 }
27