llvm-project/clang/test/CodeGenCXX/dynamic-cast-always-null.cpp
Nikita Popov 532dc62b90 [OpaquePtrs][Clang] Add -no-opaque-pointers to tests (NFC)
This adds -no-opaque-pointers to clang tests whose output will
change when opaque pointers are enabled by default. This is
intended to be part of the migration approach described in
https://discourse.llvm.org/t/enabling-opaque-pointers-by-default/61322/9.

The patch has been produced by replacing %clang_cc1 with
%clang_cc1 -no-opaque-pointers for tests that fail with opaque
pointers enabled. Worth noting that this doesn't cover all tests,
there's a remaining ~40 tests not using %clang_cc1 that will need
a followup change.

Differential Revision: https://reviews.llvm.org/D123115
2022-04-07 12:09:47 +02:00

27 lines
709 B
C++

// RUN: %clang_cc1 -no-opaque-pointers -I%S %s -triple x86_64-apple-darwin10 -emit-llvm -fcxx-exceptions -fexceptions -std=c++11 -o - | FileCheck %s
struct A { virtual ~A(); };
struct B final : A { };
struct C { virtual ~C(); int c; };
// CHECK: @_Z1fP1B
C *f(B* b) {
// CHECK-NOT: call i8* @__dynamic_cast
// CHECK: ret %struct.C* null
return dynamic_cast<C*>(b);
}
// CHECK: @_Z1fR1B
C &f(B& b) {
// CHECK-NOT: call i8* @__dynamic_cast
// CHECK: call void @__cxa_bad_cast() [[NR:#[0-9]+]]
// CHECK: ret %struct.C* undef
return dynamic_cast<C&>(b);
}
void dont_crash() {
(void) dynamic_cast<void*>((A*)0);
(void) dynamic_cast<void*>((B*)0);
}
// CHECK: attributes [[NR]] = { noreturn }