mirror of
https://github.com/llvm/llvm-project.git
synced 2025-05-02 23:56:05 +00:00
a2347baaec
Because references must be initialized using some evaluated expression, they must point to something, and a callee can assume the reference parameter is dereferenceable. Taking advantage of a new attribute just added to LLVM, mark them as such. Because dereferenceability in addrspace(0) implies nonnull in the backend, we don't need both attributes. However, we need to know the size of the object to use the dereferenceable attribute, so for incomplete types we still emit only nonnull. llvm-svn: 213386
27 lines
822 B
C++
27 lines
822 B
C++
// RUN: %clang_cc1 -triple armv7-apple-ios -x c++ -emit-llvm -o - %s | FileCheck %s
|
|
// RUN: %clang_cc1 -triple arm64-apple-ios -x c++ -emit-llvm -o - %s | FileCheck %s
|
|
|
|
// According to the Itanium ABI (3.1.1), types with non-trivial copy
|
|
// constructors passed by value should be passed indirectly, with the caller
|
|
// creating a temporary.
|
|
|
|
struct Empty;
|
|
|
|
struct Empty {
|
|
Empty(const Empty &e);
|
|
bool check();
|
|
};
|
|
|
|
bool foo(Empty e) {
|
|
// CHECK: @_Z3foo5Empty(%struct.Empty* %e)
|
|
// CHECK: call {{.*}} @_ZN5Empty5checkEv(%struct.Empty* %e)
|
|
return e.check();
|
|
}
|
|
|
|
void caller(Empty &e) {
|
|
// CHECK: @_Z6callerR5Empty(%struct.Empty* dereferenceable({{[0-9]+}}) %e)
|
|
// CHECK: call {{.*}} @_ZN5EmptyC1ERKS_(%struct.Empty* [[NEWTMP:%.*]], %struct.Empty*
|
|
// CHECK: call {{.*}} @_Z3foo5Empty(%struct.Empty* [[NEWTMP]])
|
|
foo(e);
|
|
}
|