clang/test/CodeGenCXX/empty-nontrivially-copyable.cpp

   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
  15 bool foo(Empty e) {
  16 // CHECK: @_Z3foo5Empty(ptr noundef %e)
  17 // CHECK: call {{.*}} @_ZN5Empty5checkEv(ptr {{[^,]*}} %e)
  18   return e.check();
  19 }
  20
  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 }