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llvm-project/clang/test/CodeGenCXX/clang-abi-compat.cpp

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Itanium Mangling: Fix handling of <expr-primary> in <template-arg>. Previously, we were emitting an extraneous X .. E in <template-arg> around an <expr-primary> if the template argument was constructed from an expression (rather than an already-evaluated literal value). In such a case, we would then e.g. emit 'XLi0EE' instead of 'Li0E'. We had one special-case for DeclRefExpr expressions, in particular, to omit them the mangled-name without the surrounding X/E. However, unfortunately, that special case also triggered for ParmVarDecl (a subtype of VarDecl), and _incorrectly_ emitted 'L_Z .. E' instead of the proper 'Xfp_E'. This change causes mangleExpression itself to be responsible for emitting X/E around non-primary expressions, which removes the special-case, and corrects both these problems. Differential Revision: https://reviews.llvm.org/D95487
2021-01-25 04:50:15 +08:00
// RUN: %clang_cc1 -std=c++98 -triple x86_64-linux-gnu -fenable-matrix -fclang-abi-compat=3.0 %s -emit-llvm -o - -Wno-c++11-extensions \
// RUN: | FileCheck --check-prefixes=CHECK,PRE39,PRE5,PRE12 %s
// RUN: %clang_cc1 -std=c++17 -triple x86_64-linux-gnu -fenable-matrix -fclang-abi-compat=3.0 %s -emit-llvm -o - \
// RUN: | FileCheck --check-prefixes=CHECK,PRE39,PRE5,PRE12 %s
// RUN: %clang_cc1 -std=c++17 -triple x86_64-linux-gnu -fenable-matrix -fclang-abi-compat=3.8 %s -emit-llvm -o - \
// RUN: | FileCheck --check-prefixes=CHECK,PRE39,PRE5,PRE12 %s
// RUN: %clang_cc1 -std=c++17 -triple x86_64-linux-gnu -fenable-matrix -fclang-abi-compat=3.9 %s -emit-llvm -o - \
// RUN: | FileCheck --check-prefixes=CHECK,V39,PRE5,PRE12 %s
// RUN: %clang_cc1 -std=c++17 -triple x86_64-linux-gnu -fenable-matrix -fclang-abi-compat=4.0 %s -emit-llvm -o - \
// RUN: | FileCheck --check-prefixes=CHECK,V39,PRE5,PRE12 %s
// RUN: %clang_cc1 -std=c++17 -triple x86_64-linux-gnu -fenable-matrix -fclang-abi-compat=5 %s -emit-llvm -o - \
// RUN: | FileCheck --check-prefixes=CHECK,V39,V5,PRE12,PRE12-CXX17 %s
// RUN: %clang_cc1 -std=c++17 -triple x86_64-linux-gnu -fenable-matrix -fclang-abi-compat=11 %s -emit-llvm -o - \
// RUN: | FileCheck --check-prefixes=CHECK,V39,V5,PRE12,PRE12-CXX17 %s
// RUN: %clang_cc1 -std=c++20 -triple x86_64-linux-gnu -fenable-matrix -fclang-abi-compat=11 %s -emit-llvm -o - \
Fix bad mangling of <data-member-prefix> for a closure in the initializer of a variable at global namespace scope. This implements the direction proposed in https://github.com/itanium-cxx-abi/cxx-abi/pull/126. Differential Revision: https://reviews.llvm.org/D101968
2021-05-06 09:56:58 +08:00
// RUN: | FileCheck --check-prefixes=CHECK,V39,V5,PRE12,PRE12-CXX17,PRE12-CXX20,PRE13-CXX20 %s
// RUN: %clang_cc1 -std=c++20 -triple x86_64-linux-gnu -fenable-matrix -fclang-abi-compat=12 %s -emit-llvm -o - \
// RUN: | FileCheck --check-prefixes=CHECK,V39,V5,V12,V12-CXX17,V12-CXX20,PRE13-CXX20 %s
Itanium Mangling: Fix handling of <expr-primary> in <template-arg>. Previously, we were emitting an extraneous X .. E in <template-arg> around an <expr-primary> if the template argument was constructed from an expression (rather than an already-evaluated literal value). In such a case, we would then e.g. emit 'XLi0EE' instead of 'Li0E'. We had one special-case for DeclRefExpr expressions, in particular, to omit them the mangled-name without the surrounding X/E. However, unfortunately, that special case also triggered for ParmVarDecl (a subtype of VarDecl), and _incorrectly_ emitted 'L_Z .. E' instead of the proper 'Xfp_E'. This change causes mangleExpression itself to be responsible for emitting X/E around non-primary expressions, which removes the special-case, and corrects both these problems. Differential Revision: https://reviews.llvm.org/D95487
2021-01-25 04:50:15 +08:00
// RUN: %clang_cc1 -std=c++98 -triple x86_64-linux-gnu -fenable-matrix -fclang-abi-compat=latest %s -emit-llvm -o - -Wno-c++11-extensions \
// RUN: | FileCheck --check-prefixes=CHECK,V39,V5,V12 %s
// RUN: %clang_cc1 -std=c++20 -triple x86_64-linux-gnu -fenable-matrix -fclang-abi-compat=latest %s -emit-llvm -o - \
Fix bad mangling of <data-member-prefix> for a closure in the initializer of a variable at global namespace scope. This implements the direction proposed in https://github.com/itanium-cxx-abi/cxx-abi/pull/126. Differential Revision: https://reviews.llvm.org/D101968
2021-05-06 09:56:58 +08:00
// RUN: | FileCheck --check-prefixes=CHECK,V39,V5,V12,V12-CXX17,V12-CXX20,V13-CXX20 %s
Add flag to request Clang is ABI-compatible with older versions of itself This patch adds a flag -fclang-abi-compat that can be used to request that Clang attempts to be ABI-compatible with some older version of itself. This is provided on a best-effort basis; right now, this can be used to undo the ABI change in r310401, reverting Clang to its prior C++ ABI for pass/return by value of class types affected by that change, and to undo the ABI change in r262688, reverting Clang to using integer registers rather than SSE registers for passing <1 x long long> vectors. The intent is that we will maintain this backwards compatibility path as we make ABI-breaking fixes in future. The reversion to the old behavior for r310401 is also applied to the PS4 target since that change is not part of its platform ABI (which is essentially to do whatever Clang 3.2 did). llvm-svn: 311823
2017-08-26 09:04:35 +08:00
typedef __attribute__((vector_size(8))) long long v1xi64;
void clang39(v1xi64) {}
// PRE39: @_Z7clang39Dv1_x(i64
// V39: @_Z7clang39Dv1_x(double
struct A {
A(const A&) = default;
A(A&&);
};
void clang5(A) {}
// PRE5: @_Z6clang51A()
// V5: @_Z6clang51A(%{{.*}}*
Fix mangling of substitutions for template-prefixes. Previously we only considered using a substitution for a template-name after already having mangled its prefix, so we'd produce nonsense manglings like NS3_S4_IiEE where we should simply produce NS4_IiEE. This is not ABI-compatible with previous Clang versions, and the old behavior is restored by -fclang-abi-compat=11.0 or earlier.
2020-11-25 07:20:06 +08:00
namespace mangle_template_prefix {
// PRE12: @_ZN22mangle_template_prefix1fINS_1TEEEvNT_1UIiE1VIiEENS4_S5_IfEE(
// V12: @_ZN22mangle_template_prefix1fINS_1TEEEvNT_1UIiE1VIiEENS5_IfEE(
template<typename T> void f(typename T::template U<int>::template V<int>, typename T::template U<int>::template V<float>);
struct T { template<typename I> struct U { template<typename J> using V = int; }; };
void g() { f<T>(1, 2); }
}
Consider reference, pointer, and pointer-to-member TemplateArguments to be different if they have different types. For the Itanium ABI, this implements the mangling rule suggested in https://github.com/itanium-cxx-abi/cxx-abi/issues/47, namely mangling such template arguments as being cast to the parameter type in the case where the template name is overloadable. This can cause a mangling change for rare cases, where * the template argument declaration is converted from its declared type to the type of the template parameter, and * the template parameter either has a deduced type or is a parameter of a function template. However, such changes are necessary to avoid mangling collisions. The ABI changes can be reversed with -fclang-abi-compat=11 or earlier. Re-commit with a fix for a couple of regressions. Differential Revision: https://reviews.llvm.org/D91488
2020-11-15 09:37:25 +08:00
int arg;
template<const int *> struct clang12_unchanged {};
// CHECK: @_Z4test17clang12_unchangedIXadL_Z3argEEE
void test(clang12_unchanged<&arg>) {}
#if __cplusplus >= 201703L
// PRE12-CXX17: @_Z4test15clang12_changedIXadL_Z3argEEE
// V12-CXX17: @_Z4test15clang12_changedIXcvPKiadL_Z3argEEE
template<auto> struct clang12_changed {};
void test(clang12_changed<(const int*)&arg>) {}
#endif
// PRE12: @_Z9clang12_aIXadL_Z3argEEEvv
// V12: @_Z9clang12_aIXcvPKiadL_Z3argEEEvv
template<const int *> void clang12_a() {}
template void clang12_a<&arg>();
// PRE12: @_Z9clang12_bIXadL_Z3arrEEEvv
// V12: @_Z9clang12_bIXadsoKcL_Z3arrEEEEvv
extern const char arr[6] = "hello";
template<const char *> void clang12_b() {}
template void clang12_b<arr>();
// CHECK: @_Z9clang12_cIXadL_Z3arrEEEvv
template<const char (*)[6]> void clang12_c() {}
template void clang12_c<&arr>();
Itanium Mangling: Fix handling of <expr-primary> in <template-arg>. Previously, we were emitting an extraneous X .. E in <template-arg> around an <expr-primary> if the template argument was constructed from an expression (rather than an already-evaluated literal value). In such a case, we would then e.g. emit 'XLi0EE' instead of 'Li0E'. We had one special-case for DeclRefExpr expressions, in particular, to omit them the mangled-name without the surrounding X/E. However, unfortunately, that special case also triggered for ParmVarDecl (a subtype of VarDecl), and _incorrectly_ emitted 'L_Z .. E' instead of the proper 'Xfp_E'. This change causes mangleExpression itself to be responsible for emitting X/E around non-primary expressions, which removes the special-case, and corrects both these problems. Differential Revision: https://reviews.llvm.org/D95487
2021-01-25 04:50:15 +08:00
/// Tests for <template-arg> <expr-primary> changes in clang12:
namespace expr_primary {
struct A {
template<int N> struct Int {};
template<int& N> struct Ref {};
};
/// Check various DeclRefExpr manglings
// PRE12: @_ZN12expr_primary5test1INS_1AEEEvNT_3IntIXLi1EEEE
// V12: @_ZN12expr_primary5test1INS_1AEEEvNT_3IntILi1EEE
template <typename T> void test1(typename T::template Int<1> a) {}
template void test1<A>(typename A::template Int<1> a);
enum Enum { EnumVal = 4 };
int Global;
// PRE12: @_ZN12expr_primary5test2INS_1AEEEvNT_3IntIXLNS_4EnumE4EEEE
// V12: @_ZN12expr_primary5test2INS_1AEEEvNT_3IntILNS_4EnumE4EEE
template <typename T> void test2(typename T::template Int<EnumVal> a) {}
template void test2<A>(typename A::template Int<4> a);
// CHECK: @_ZN12expr_primary5test3ILi3EEEvNS_1A3IntIXT_EEE
template <int X> void test3(typename A::template Int<X> a) {}
template void test3<3>(A::Int<3> a);
#if __cplusplus >= 202002L
// CHECK-CXX20: @_ZN12expr_primary5test4INS_1AEEEvNT_3RefIL_ZNS_6GlobalEEEE
template <typename T> void test4(typename T::template Ref<(Global)> a) {}
template void test4<A>(typename A::template Ref<Global> a);
struct B {
struct X {
constexpr X(double) {}
constexpr X(int&) {}
};
template<X> struct Y {};
};
// PRE12-CXX20: _ZN12expr_primary5test5INS_1BEEEvNT_1YIXLd3ff0000000000000EEEE
// V12-CXX20: _ZN12expr_primary5test5INS_1BEEEvNT_1YILd3ff0000000000000EEE
template<typename T> void test5(typename T::template Y<1.0>) { }
template void test5<B>(typename B::Y<1.0>);
// PRE12-CXX20: @_ZN12expr_primary5test6INS_1BEEENT_1YIL_ZZNS_5test6EiE1bEEEi
// V12-CXX20: @_ZN12expr_primary5test6INS_1BEEENT_1YIXfp_EEEi
template<typename T> auto test6(int b) -> typename T::template Y<b> { return {}; }
template auto test6<B>(int b) -> B::Y<b>;
#endif
/// Verify non-dependent type-traits within a dependent template arg.
// PRE12: @_ZN12expr_primary5test7INS_1AEEEvNT_3IntIXLm1EEEE
// V12: @_ZN12expr_primary5test7INS_1AEEEvNT_3IntILm1EEE
template <class T> void test7(typename T::template Int<sizeof(char)> a) {}
template void test7<A>(A::Int<1>);
// PRE12: @_ZN12expr_primary5test8ILi2EEEvu11matrix_typeIXLi1EEXT_EiE
// V12: @_ZN12expr_primary5test8ILi2EEEvu11matrix_typeILi1EXT_EiE
template<int N> using matrix1xN = int __attribute__((matrix_type(1, N)));
template<int N> void test8(matrix1xN<N> a) {}
template void test8<2>(matrix1xN<2> a);
Itanium Mangling: In 'enable_if', omit X/E around <expr-primary>. The Clang enable_if extension is mangled as an <extended-qualifier>, which is supposed to contain <template-args>. However, we were unconditionally emitting X/E around its arguments, neglecting the fact that <expr-primary> should be emitted directly without the surrounding X/E. Differential Revision: https://reviews.llvm.org/D95488
2021-01-25 05:23:58 +08:00
// PRE12: @_ZN12expr_primary5test9EUa9enable_ifIXLi1EEEv
// V12: @_ZN12expr_primary5test9EUa9enable_ifILi1EEv
void test9(void) __attribute__((enable_if(1, ""))) {}
Itanium Mangling: Fix handling of <expr-primary> in <template-arg>. Previously, we were emitting an extraneous X .. E in <template-arg> around an <expr-primary> if the template argument was constructed from an expression (rather than an already-evaluated literal value). In such a case, we would then e.g. emit 'XLi0EE' instead of 'Li0E'. We had one special-case for DeclRefExpr expressions, in particular, to omit them the mangled-name without the surrounding X/E. However, unfortunately, that special case also triggered for ParmVarDecl (a subtype of VarDecl), and _incorrectly_ emitted 'L_Z .. E' instead of the proper 'Xfp_E'. This change causes mangleExpression itself to be responsible for emitting X/E around non-primary expressions, which removes the special-case, and corrects both these problems. Differential Revision: https://reviews.llvm.org/D95487
2021-01-25 04:50:15 +08:00
}
Fix bad mangling of <data-member-prefix> for a closure in the initializer of a variable at global namespace scope. This implements the direction proposed in https://github.com/itanium-cxx-abi/cxx-abi/pull/126. Differential Revision: https://reviews.llvm.org/D101968
2021-05-06 09:56:58 +08:00
#if __cplusplus >= 202002L
// PRE13-CXX20: @_Z15observe_lambdasI17inline_var_lambdaMUlvE_17inline_var_lambdaMUlvE0_PiS2_S0_S1_EiT_T0_T1_T2_
// V13-CXX20: @_Z15observe_lambdasIN17inline_var_lambdaMUlvE_ENS0_UlvE0_EPiS3_S1_S2_EiT_T0_T1_T2_
template <typename T, typename U, typename V, typename W, typename = T, typename = U>
int observe_lambdas(T, U, V, W) { return 0; }
inline auto inline_var_lambda = observe_lambdas([]{}, []{}, (int*)0, (int*)0);
int use_inline_var_lambda() { return inline_var_lambda; }
#endif