2579b411a1
Fixes https://github.com/llvm/llvm-project/pull/104722. Missed handling `decltype(auto)` trailing return types for lambdas. This was a mistake and regression on my part with my PR, https://github.com/llvm/llvm-project/pull/104722. Added some missing unit tests to test for the various placeholder trailing return types in lambdas.
398 lines
11 KiB
C++
398 lines
11 KiB
C++
// RUN: %clang_cc1 -std=c++17 -fms-compatibility-version=19.20 -emit-llvm %s -o - -fms-extensions -fdelayed-template-parsing -triple=x86_64-pc-windows-msvc | FileCheck %s
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struct StructA {};
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template<class T>
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auto AutoT() { return T(); }
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template<class T>
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const auto AutoConstT() { return T(); }
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template<class T>
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volatile auto AutoVolatileT() { return T(); }
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template<class T>
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const volatile auto AutoConstVolatileT() { return T(); }
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// The qualifiers of the return type should always be emitted even for void types.
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// Void types usually have their qualifers stripped in the mangled name for MSVC ABI.
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void test_template_auto_void() {
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AutoT<void>();
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// CHECK: call {{.*}} @"??$AutoT@X@@YA?A_PXZ"
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AutoT<const void>();
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// CHECK: call {{.*}} @"??$AutoT@$$CBX@@YA?A_PXZ"
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AutoT<volatile void>();
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// CHECK: call {{.*}} @"??$AutoT@$$CCX@@YA?A_PXZ"
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AutoT<const volatile void>();
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// CHECK: call {{.*}} @"??$AutoT@$$CDX@@YA?A_PXZ"
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AutoConstT<void>();
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// CHECK: call {{.*}} @"??$AutoConstT@X@@YA?B_PXZ"
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AutoVolatileT<void>();
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// CHECK: call {{.*}} @"??$AutoVolatileT@X@@YA?C_PXZ"
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AutoConstVolatileT<void>();
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// CHECK: call {{.*}} @"??$AutoConstVolatileT@X@@YA?D_PXZ"
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}
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void test_template_auto_int() {
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AutoT<int>();
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// CHECK: call {{.*}} @"??$AutoT@H@@YA?A_PXZ"
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AutoT<const int>();
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// CHECK: call {{.*}} @"??$AutoT@$$CBH@@YA?A_PXZ"
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AutoT<volatile int>();
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// CHECK: call {{.*}} @"??$AutoT@$$CCH@@YA?A_PXZ"
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AutoT<const volatile int>();
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// CHECK: call {{.*}} @"??$AutoT@$$CDH@@YA?A_PXZ"
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AutoConstT<int>();
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// CHECK: call {{.*}} @"??$AutoConstT@H@@YA?B_PXZ"
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AutoVolatileT<int>();
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// CHECK: call {{.*}} @"??$AutoVolatileT@H@@YA?C_PXZ"
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AutoConstVolatileT<int>();
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// CHECK: call {{.*}} @"??$AutoConstVolatileT@H@@YA?D_PXZ"
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}
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void test_template_auto_struct() {
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AutoT<StructA>();
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// CHECK: call {{.*}} @"??$AutoT@UStructA@@@@YA?A_PXZ"
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AutoT<const StructA>();
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// CHECK: call {{.*}} @"??$AutoT@$$CBUStructA@@@@YA?A_PXZ"
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AutoConstT<StructA>();
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// CHECK: call {{.*}} @"??$AutoConstT@UStructA@@@@YA?B_PXZ"
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AutoVolatileT<StructA>();
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// CHECK: call {{.*}} @"??$AutoVolatileT@UStructA@@@@YA?C_PXZ"
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AutoConstVolatileT<StructA>();
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// CHECK: call {{.*}} @"??$AutoConstVolatileT@UStructA@@@@YA?D_PXZ"
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}
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void test_template_auto_ptr() {
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AutoT<int*>();
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// CHECK: call {{.*}} @"??$AutoT@PEAH@@YA?A_PXZ"
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AutoT<const int*>();
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// CHECK: call {{.*}} @"??$AutoT@PEBH@@YA?A_PXZ"
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AutoT<const int* const>();
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// CHECK: call {{.*}} @"??$AutoT@QEBH@@YA?A_PXZ"
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AutoConstT<int*>();
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// CHECK: call {{.*}} @"??$AutoConstT@PEAH@@YA?B_PXZ"
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AutoVolatileT<int*>();
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// CHECK: call {{.*}} @"??$AutoVolatileT@PEAH@@YA?C_PXZ"
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AutoConstVolatileT<int*>();
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// CHECK: call {{.*}} @"??$AutoConstVolatileT@PEAH@@YA?D_PXZ"
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}
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template<class T>
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auto* PtrAutoT() { return T(); }
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template<class T>
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const auto* PtrAutoConstT() { return T(); }
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template<class T>
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volatile auto* PtrAutoVolatileT() { return T(); }
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template<class T>
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const volatile auto* PtrAutoConstVolatileT() { return T(); }
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void test_template_ptr_auto() {
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PtrAutoT<int*>();
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// CHECK: call {{.*}} @"??$PtrAutoT@PEAH@@YAPEA_PXZ"
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PtrAutoT<const int*>();
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// CHECK: call {{.*}} @"??$PtrAutoT@PEBH@@YAPEA_PXZ"
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PtrAutoT<const int* const>();
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// CHECK: call {{.*}} @"??$PtrAutoT@QEBH@@YAPEA_PXZ"
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PtrAutoConstT<int*>();
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// CHECK: call {{.*}} @"??$PtrAutoConstT@PEAH@@YAPEB_PXZ"
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PtrAutoVolatileT<int*>();
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// CHECK: call {{.*}} @"??$PtrAutoVolatileT@PEAH@@YAPEC_PXZ"
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PtrAutoConstVolatileT<int*>();
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// CHECK: call {{.*}} @"??$PtrAutoConstVolatileT@PEAH@@YAPED_PXZ"
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}
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int func_int();
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const int func_constint();
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void func_void();
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int* func_intptr();
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template<class T, T v>
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auto (*FuncPtrAutoT())() { return v; }
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void test_template_func_ptr_auto() {
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FuncPtrAutoT<int (*)(), &func_int>();
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// CHECK: call {{.*}} @"??$FuncPtrAutoT@P6AHXZ$1?func_int@@YAHXZ@@YAP6A?A_PXZXZ"
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FuncPtrAutoT<const int (*)(), &func_constint>();
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// CHECK: call {{.*}} @"??$FuncPtrAutoT@P6A?BHXZ$1?func_constint@@YA?BHXZ@@YAP6A?A_PXZXZ"
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FuncPtrAutoT<void (*)(), &func_void>();
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// CHECK: call {{.*}} @"??$FuncPtrAutoT@P6AXXZ$1?func_void@@YAXXZ@@YAP6A?A_PXZXZ"
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FuncPtrAutoT<int * (*)(), &func_intptr>();
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// CHECK: call {{.*}} @"??$FuncPtrAutoT@P6APEAHXZ$1?func_intptr@@YAPEAHXZ@@YAP6A?A_PXZXZ"
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}
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template<class T>
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auto& RefAutoT(T& x) { return x; }
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template<class T>
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const auto& ConstRefAutoT(T& x) { return x; }
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template<class T>
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auto&& RRefAutoT(T& x) { return static_cast<int&&>(x); }
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void test_template_ref_auto() {
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int x;
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RefAutoT(x);
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// CHECK: call {{.*}} @"??$RefAutoT@H@@YAAEA_PAEAH@Z"
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ConstRefAutoT(x);
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// CHECK: call {{.*}} @"??$ConstRefAutoT@H@@YAAEB_PAEAH@Z"
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RRefAutoT(x);
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// CHECK: call {{.*}} @"??$RRefAutoT@H@@YA$$QEA_PAEAH@Z"
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}
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template<class T>
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decltype(auto) DecltypeAutoT() { return T(); }
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template<class T>
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decltype(auto) DecltypeAutoT2(T& x) { return static_cast<T&&>(x); }
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void test_template_decltypeauto() {
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DecltypeAutoT<void>();
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// CHECK: call {{.*}} @"??$DecltypeAutoT@X@@YA?A_TXZ"
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DecltypeAutoT<const void>();
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// CHECK: call {{.*}} @"??$DecltypeAutoT@$$CBX@@YA?A_TXZ"
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DecltypeAutoT<volatile void>();
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// CHECK: call {{.*}} @"??$DecltypeAutoT@$$CCX@@YA?A_TXZ"
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DecltypeAutoT<const volatile void>();
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// CHECK: call {{.*}} @"??$DecltypeAutoT@$$CDX@@YA?A_TXZ"
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DecltypeAutoT<int>();
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// CHECK: call {{.*}} @"??$DecltypeAutoT@H@@YA?A_TXZ"
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DecltypeAutoT<const int>();
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// CHECK: call {{.*}} @"??$DecltypeAutoT@$$CBH@@YA?A_TXZ"
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DecltypeAutoT<volatile int>();
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// CHECK: call {{.*}} @"??$DecltypeAutoT@$$CCH@@YA?A_TXZ"
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DecltypeAutoT<const volatile int>();
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// CHECK: call {{.*}} @"??$DecltypeAutoT@$$CDH@@YA?A_TXZ"
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int x;
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DecltypeAutoT2(x);
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// CHECK: call {{.*}} @"??$DecltypeAutoT2@H@@YA?A_TAEAH@Z"
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}
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// Still want to use clang's custom mangling for lambdas to keep backwards compatibility until
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// MSVC lambda name mangling has been deciphered.
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void test_lambda() {
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int i = 0;
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auto lambdaIntRetAuto = []() { return 0; };
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lambdaIntRetAuto();
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// CHECK: call {{.*}} @"??R<lambda_1>@?0??test_lambda@@YAXXZ@QEBA?A?<auto>@@XZ"
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auto lambdaIntRet = []() -> int { return 0; };
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lambdaIntRet();
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// CHECK: call {{.*}} @"??R<lambda_2>@?0??test_lambda@@YAXXZ@QEBA@XZ"
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auto lambdaGenericIntIntRetAuto = [](auto a) { return a; };
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lambdaGenericIntIntRetAuto(0);
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// CHECK: call {{.*}} @"??$?RH@<lambda_0>@?0??test_lambda@@YAXXZ@QEBA?A?<auto>@@H@Z"
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auto lambdaRetTrailingAuto = []() -> auto { return 0; };
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lambdaRetTrailingAuto();
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// CHECK: call {{.*}} @"??R<lambda_3>@?0??test_lambda@@YAXXZ@QEBA?A?<auto>@@XZ"
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auto lambdaRetTrailingDecltypeAuto = []() -> decltype(auto) { return 0; };
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lambdaRetTrailingDecltypeAuto();
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// CHECK: call {{.*}} @"??R<lambda_4>@?0??test_lambda@@YAXXZ@QEBA?A?<decltype-auto>@@XZ"
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auto lambdaRetTrailingRefCollapse = [](int x) -> auto&& { return x; };
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lambdaRetTrailingRefCollapse(i);
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// CHECK: call {{.*}} @"??R<lambda_5>@?0??test_lambda@@YAXXZ@QEBA?A?<auto>@@H@Z"
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}
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auto TestTrailingInt() -> int {
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return 0;
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}
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auto TestTrailingConstVolatileVoid() -> const volatile void {
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}
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auto TestTrailingStructA() -> StructA {
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return StructA{};
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}
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void test_trailing_return() {
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TestTrailingInt();
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// CHECK: call {{.*}} @"?TestTrailingInt@@YAHXZ"
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TestTrailingConstVolatileVoid();
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// CHECK: call {{.*}} @"?TestTrailingConstVolatileVoid@@YAXXZ"
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TestTrailingStructA();
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// CHECK: call {{.*}} @"?TestTrailingStructA@@YA?AUStructA@@XZ"
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}
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auto TestNonTemplateAutoInt() {
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return 0;
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}
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auto TestNonTemplateAutoVoid() {
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return;
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}
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auto TestNonTemplateAutoStructA() {
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return StructA{};
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}
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const auto TestNonTemplateConstAutoInt() {
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return 0;
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}
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const auto TestNonTemplateConstAutoVoid() {
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return;
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}
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const auto TestNonTemplateConstAutoStructA() {
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return StructA{};
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}
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void test_nontemplate_auto() {
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TestNonTemplateAutoInt();
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// CHECK: call {{.*}} @"?TestNonTemplateAutoInt@@YA@XZ"
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TestNonTemplateAutoVoid();
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// CHECK: call {{.*}} @"?TestNonTemplateAutoVoid@@YA@XZ"
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TestNonTemplateAutoStructA();
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// CHECK: call {{.*}} @"?TestNonTemplateAutoStructA@@YA@XZ"
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TestNonTemplateConstAutoInt();
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// CHECK: call {{.*}} @"?TestNonTemplateConstAutoInt@@YA@XZ"
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TestNonTemplateConstAutoVoid();
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// CHECK: call {{.*}} @"?TestNonTemplateConstAutoVoid@@YA@XZ"
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TestNonTemplateConstAutoStructA();
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// CHECK: call {{.*}} @"?TestNonTemplateConstAutoStructA@@YA@XZ"
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}
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decltype(auto) TestNonTemplateDecltypeAutoInt() {
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return 0;
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}
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decltype(auto) TestNonTemplateDecltypeAutoVoid() {
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return;
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}
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decltype(auto) TestNonTemplateDecltypeAutoStructA() {
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return StructA{};
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}
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void test_nontemplate_decltypeauto() {
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TestNonTemplateDecltypeAutoInt();
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// CHECK: call {{.*}} @"?TestNonTemplateDecltypeAutoInt@@YA@XZ"
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TestNonTemplateDecltypeAutoVoid();
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// CHECK: call {{.*}} @"?TestNonTemplateDecltypeAutoVoid@@YA@XZ"
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TestNonTemplateDecltypeAutoStructA();
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// CHECK: call {{.*}} @"?TestNonTemplateDecltypeAutoStructA@@YA@XZ"
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}
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struct StructB {
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int x;
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};
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template<class T>
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auto StructB::* AutoMemberDataPtrT(T x) { return x; }
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template<class T>
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const auto StructB::* AutoConstMemberDataPtrT(T x) { return x; }
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void test_template_auto_member_data_ptr() {
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AutoMemberDataPtrT(&StructB::x);
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// CHECK: call {{.*}} @"??$AutoMemberDataPtrT@PEQStructB@@H@@YAPEQStructB@@_PPEQ0@H@Z"
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AutoConstMemberDataPtrT(&StructB::x);
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// CHECK: call {{.*}} @"??$AutoConstMemberDataPtrT@PEQStructB@@H@@YAPERStructB@@_PPEQ0@H@Z"
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}
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struct StructC {
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void test() {}
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};
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struct StructD {
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const int test() { return 0; }
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};
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template<class T>
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auto (StructC::*AutoMemberFuncPtrT(T x))() { return x; }
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template<class T>
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const auto (StructD::*AutoConstMemberFuncPtrT(T x))() { return x; }
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void test_template_auto_member_func_ptr() {
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AutoMemberFuncPtrT(&StructC::test);
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// CHECK: call {{.*}} @"??$AutoMemberFuncPtrT@P8StructC@@EAAXXZ@@YAP8StructC@@EAA?A_PXZP80@EAAXXZ@Z"
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AutoConstMemberFuncPtrT(&StructD::test);
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// CHECK: call {{.*}} @"??$AutoConstMemberFuncPtrT@P8StructD@@EAA?BHXZ@@YAP8StructD@@EAA?B_PXZP80@EAA?BHXZ@Z"
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}
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template<class T>
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auto * __attribute__((address_space(1))) * AutoPtrAddressSpaceT() {
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T * __attribute__((address_space(1))) * p = nullptr;
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return p;
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}
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void test_template_auto_address_space_ptr() {
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AutoPtrAddressSpaceT<int>();
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// CHECK: call {{.*}} @"??$AutoPtrAddressSpaceT@H@@YA?A?<auto>@@XZ"
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}
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template<class T>
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auto&& AutoReferenceCollapseT(T& x) { return static_cast<T&>(x); }
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auto&& AutoReferenceCollapse(int& x) { return static_cast<int&>(x); }
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void test2() {
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int x = 1;
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auto&& rref0 = AutoReferenceCollapseT(x);
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// CHECK: call {{.*}} @"??$AutoReferenceCollapseT@H@@YA$$QEA_PAEAH@Z"
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auto&& rref1 = AutoReferenceCollapse(x);
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// CHECK: call {{.*}} @"?AutoReferenceCollapse@@YA@AEAH@Z"
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}
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