3 files changed, 28 insertions, 0 deletions
diff --git a/clang/test/Driver/std.cpp b/clang/test/Driver/std.cpp
index aceda017a4e..52b42ab9bd4 100644
--- a/clang/test/Driver/std.cpp
+++ b/clang/test/Driver/std.cpp
@@ -9,6 +9,9 @@
 // RUN: not %clang -std=gnu++1y %s -fsyntax-only 2>&1 | FileCheck -check-prefix=GNUXX1Y %s
 // RUN: not %clang -std=c++1z %s -fsyntax-only 2>&1 | FileCheck -check-prefix=CXX1Z %s
 // RUN: not %clang -std=gnu++1z %s -fsyntax-only 2>&1 | FileCheck -check-prefix=GNUXX1Z %s
+// RUN: not %clang -std=c++2a %s -fsyntax-only 2>&1 | FileCheck -check-prefix=CXX2A %s
+// RUN: not %clang -std=gnu++2a %s -fsyntax-only 2>&1 | FileCheck -check-prefix=GNUXX2A %s
+
 
 void f(int n) {
   typeof(n)();
@@ -38,3 +41,10 @@ void f(int n) {
 
 // GNUXX1Z-NOT: undeclared identifier 'typeof'
 // GNUXX1Z-NOT: undeclared identifier 'decltype'
+
+// CXX2A: undeclared identifier 'typeof'
+// CXX2A-NOT: undeclared identifier 'decltype'
+
+// GNUXX2A-NOT: undeclared identifier 'typeof'
+// GNUXX2A-NOT: undeclared identifier 'decltype'
+
diff --git a/clang/test/Driver/unknown-std.cpp b/clang/test/Driver/unknown-std.cpp
index 4f7a5e64a6e..195a671edad 100644
--- a/clang/test/Driver/unknown-std.cpp
+++ b/clang/test/Driver/unknown-std.cpp
@@ -15,6 +15,8 @@
 // CHECK-NEXT: note: use 'gnu++14' for 'ISO C++ 2014 with amendments and GNU extensions' standard
 // CHECK-NEXT: note: use 'c++1z' for 'Working draft for ISO C++ 2017' standard
 // CHECK-NEXT: note: use 'gnu++1z' for 'Working draft for ISO C++ 2017 with GNU extensions' standard
+// CHECK-NEXT: note: use 'c++2a' for 'Working draft for ISO C++ 2020' standard
+// CHECK-NEXT: note: use 'gnu++2a' for 'Working draft for ISO C++ 2020 with GNU extensions' standard
 // CUDA-NEXT: note: use 'cuda' for 'NVIDIA CUDA(tm)' standard
 
 // Make sure that no other output is present.
diff --git a/clang/test/Preprocessor/init.c b/clang/test/Preprocessor/init.c
index 0ee7edecb3c..5a77d06d240 100644
--- a/clang/test/Preprocessor/init.c
+++ b/clang/test/Preprocessor/init.c
@@ -9,6 +9,15 @@
 // BLOCKS:#define __block __attribute__((__blocks__(byref)))
 //
 //
+// RUN: %clang_cc1 -x c++ -std=c++2a -E -dM < /dev/null | FileCheck -match-full-lines -check-prefix CXX2A %s
+//
+// CXX2A:#define __GNUG__ {{.*}}
+// CXX2A:#define __GXX_EXPERIMENTAL_CXX0X__ 1
+// CXX2A:#define __GXX_RTTI 1
+// CXX2A:#define __GXX_WEAK__ 1
+// CXX2A:#define __cplusplus 201707L
+// CXX2A:#define __private_extern__ extern
+//
 // RUN: %clang_cc1 -x c++ -std=c++1z -E -dM < /dev/null | FileCheck -match-full-lines -check-prefix CXX1Z %s
 //
 // CXX1Z:#define __GNUG__ {{.*}}
@@ -110,6 +119,13 @@
 // RUN: %clang_cc1 -ffreestanding -E -dM < /dev/null | FileCheck -match-full-lines -check-prefix FREESTANDING %s
 // FREESTANDING:#define __STDC_HOSTED__ 0
 //
+// RUN: %clang_cc1 -x c++ -std=gnu++2a -E -dM < /dev/null | FileCheck -match-full-lines -check-prefix GXX2A %s
+//
+// GXX2A:#define __GNUG__ {{.*}}
+// GXX2A:#define __GXX_WEAK__ 1
+// GXX2A:#define __cplusplus 201707L
+// GXX2A:#define __private_extern__ extern
+//
 //
 // RUN: %clang_cc1 -x c++ -std=gnu++1z -E -dM < /dev/null | FileCheck -match-full-lines -check-prefix GXX1Z %s
 //