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

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Revert "Consider reference, pointer, and pointer-to-member TemplateArguments to be different if they have different types." This reverts commit 05cdf4acf42acce9ddcff646a5d6ac666710fe6d. It breaks stage-2 compilation of LLVM, see https://reviews.llvm.org/D91488#2451534
2020-12-14 21:03:38 +08:00
// RUN: %clang_cc1 -std=c++17 -triple x86_64-linux-gnu -fclang-abi-compat=3.0 %s -emit-llvm -o - | FileCheck --check-prefixes=PRE39,PRE5,PRE12 %s
// RUN: %clang_cc1 -std=c++17 -triple x86_64-linux-gnu -fclang-abi-compat=3.8 %s -emit-llvm -o - | FileCheck --check-prefixes=PRE39,PRE5,PRE12 %s
// RUN: %clang_cc1 -std=c++17 -triple x86_64-linux-gnu -fclang-abi-compat=3.9 %s -emit-llvm -o - | FileCheck --check-prefixes=V39,PRE5,PRE12 %s
// RUN: %clang_cc1 -std=c++17 -triple x86_64-linux-gnu -fclang-abi-compat=4.0 %s -emit-llvm -o - | FileCheck --check-prefixes=V39,PRE5,PRE12 %s
// RUN: %clang_cc1 -std=c++17 -triple x86_64-linux-gnu -fclang-abi-compat=5 %s -emit-llvm -o - | FileCheck --check-prefixes=V39,V5,PRE12 %s
// RUN: %clang_cc1 -std=c++17 -triple x86_64-linux-gnu -fclang-abi-compat=11 %s -emit-llvm -o - | FileCheck --check-prefixes=V11,V5,PRE12 %s
// RUN: %clang_cc1 -std=c++17 -triple x86_64-linux-gnu -fclang-abi-compat=latest %s -emit-llvm -o - | FileCheck --check-prefixes=V39,V5,V12 %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); }
}