diff --git a/clang/lib/AST/ASTDumper.cpp b/clang/lib/AST/ASTDumper.cpp
index ce32f5090a7a..ebf5e651ef9a 100644
--- a/clang/lib/AST/ASTDumper.cpp
+++ b/clang/lib/AST/ASTDumper.cpp
@@ -987,6 +987,10 @@ void ASTDumper::dumpDecl(const Decl *D) {
       OS << " referenced";
     if (D->isInvalidDecl())
       OS << " invalid";
+    if (const FunctionDecl *FD = dyn_cast<FunctionDecl>(D))
+      if (FD->isConstexpr())
+        OS << " constexpr";
+
 
     ConstDeclVisitor<ASTDumper>::Visit(D);
 
diff --git a/clang/test/Misc/ast-dump-color.cpp b/clang/test/Misc/ast-dump-color.cpp
index db4dc2b50464..479467df7160 100644
--- a/clang/test/Misc/ast-dump-color.cpp
+++ b/clang/test/Misc/ast-dump-color.cpp
@@ -77,9 +77,9 @@ struct Invalid {
 //CHECK: {{^}}[[Blue]]| |     `-[[RESET]][[Blue]]TextComment[[RESET]][[Yellow]] 0x{{[0-9a-fA-F]*}}[[RESET]] <[[Yellow]]col:6[[RESET]], [[Yellow]]col:44[[RESET]]> Text=" Like the other variable, but different"{{$}}
 //CHECK: {{^}}[[Blue]]| |-[[RESET]][[GREEN]]CXXConstructorDecl[[RESET]][[Yellow]] 0x{{[0-9a-fA-F]*}}[[RESET]] <[[Yellow]]line:18:33[[RESET]]> [[Yellow]]col:33[[RESET]] implicit used[[CYAN]] Mutex[[RESET]] [[Green]]'void (void) noexcept'[[RESET]] inline{{.*$}}
 //CHECK: {{^}}[[Blue]]| | `-[[RESET]][[MAGENTA]]CompoundStmt[[RESET]][[Yellow]] 0x{{[0-9a-fA-F]*}}[[RESET]] <[[Yellow]]col:33[[RESET]]>{{$}}
-//CHECK: {{^}}[[Blue]]| |-[[RESET]][[GREEN]]CXXConstructorDecl[[RESET]][[Yellow]] 0x{{[0-9a-fA-F]*}}[[RESET]] <[[Yellow]]col:33[[RESET]]> [[Yellow]]col:33[[RESET]] implicit[[CYAN]] Mutex[[RESET]] [[Green]]'void (const class Mutex &)'[[RESET]] inline{{ .*$}}
+//CHECK: {{^}}[[Blue]]| |-[[RESET]][[GREEN]]CXXConstructorDecl[[RESET]][[Yellow]] 0x{{[0-9a-fA-F]*}}[[RESET]] <[[Yellow]]col:33[[RESET]]> [[Yellow]]col:33[[RESET]] implicit constexpr[[CYAN]] Mutex[[RESET]] [[Green]]'void (const class Mutex &)'[[RESET]] inline{{ .*$}}
 //CHECK: {{^}}[[Blue]]| | `-[[RESET]][[GREEN]]ParmVarDecl[[RESET]][[Yellow]] 0x{{[0-9a-fA-F]*}}[[RESET]] <[[Yellow]]col:33[[RESET]]> [[Yellow]]col:33[[RESET]] [[Green]]'const class Mutex &'[[RESET]]{{$}}
-//CHECK: {{^}}[[Blue]]| `-[[RESET]][[GREEN]]CXXConstructorDecl[[RESET]][[Yellow]] 0x{{[0-9a-fA-F]*}}[[RESET]] <[[Yellow]]col:33[[RESET]]> [[Yellow]]col:33[[RESET]] implicit[[CYAN]] Mutex[[RESET]] [[Green]]'void (class Mutex &&)'[[RESET]] inline{{ .*$}}
+//CHECK: {{^}}[[Blue]]| `-[[RESET]][[GREEN]]CXXConstructorDecl[[RESET]][[Yellow]] 0x{{[0-9a-fA-F]*}}[[RESET]] <[[Yellow]]col:33[[RESET]]> [[Yellow]]col:33[[RESET]] implicit constexpr[[CYAN]] Mutex[[RESET]] [[Green]]'void (class Mutex &&)'[[RESET]] inline{{ .*$}}
 //CHECK: {{^}}[[Blue]]|   `-[[RESET]][[GREEN]]ParmVarDecl[[RESET]][[Yellow]] 0x{{[0-9a-fA-F]*}}[[RESET]] <[[Yellow]]col:33[[RESET]]> [[Yellow]]col:33[[RESET]] [[Green]]'class Mutex &&'[[RESET]]{{$}}
 //CHECK: {{^}}[[Blue]]|-[[RESET]][[GREEN]]VarDecl[[RESET]][[Yellow]] 0x{{[0-9a-fA-F]*}}[[RESET]] <[[Yellow]]col:1[[RESET]], [[Yellow]]line:25:3[[RESET]]> [[Yellow]]col:3[[RESET]] referenced[[CYAN]] mu1[[RESET]] [[Green]]'class Mutex':'class Mutex'[[RESET]]
 //CHECK: {{^}}[[Blue]]| `-[[RESET]][[MAGENTA]]CXXConstructExpr[[RESET]][[Yellow]] 0x{{[0-9a-fA-F]*}}[[RESET]] <[[Yellow]]col:3[[RESET]]> [[Green]]'class Mutex':'class Mutex'[[RESET]][[Cyan]][[RESET]][[Cyan]][[RESET]] [[Green]]'void (void) noexcept'[[RESET]]{{$}}
@@ -93,11 +93,11 @@ struct Invalid {
 //CHECK: {{^}}[[Blue]]| |-[[RESET]][[GREEN]]CXXConstructorDecl[[RESET]][[Yellow]] 0x{{[0-9a-fA-F]*}}[[RESET]] <[[Yellow]]line:29:3[[RESET]], [[Yellow]]col:42[[RESET]]> [[Yellow]]col:29[[RESET]] invalid[[CYAN]] Invalid[[RESET]] [[Green]]'void (int)'[[RESET]]
 //CHECK: {{^}}[[Blue]]| | |-[[RESET]][[GREEN]]ParmVarDecl[[RESET]][[Yellow]] 0x{{[0-9a-fA-F]*}}[[RESET]] <[[Yellow]]col:37[[RESET]], [[Yellow]]<invalid sloc>[[RESET]]> [[Yellow]]col:42[[RESET]] invalid [[Green]]'int'[[RESET]]
 //CHECK: {{^}}[[Blue]]| | `-[[RESET]][[BLUE]]NoInlineAttr[[RESET]][[Yellow]] 0x{{[0-9a-fA-F]*}}[[RESET]] <[[Yellow]]col:18[[RESET]]>
-//CHECK: {{^}}[[Blue]]| |-[[RESET]][[GREEN]]CXXConstructorDecl[[RESET]][[Yellow]] 0x{{[0-9a-fA-F]*}}[[RESET]] <[[Yellow]]line:28:8[[RESET]]> [[Yellow]]col:8[[RESET]] implicit used[[CYAN]] Invalid[[RESET]] [[Green]]'void (void) noexcept'[[RESET]] inline
+//CHECK: {{^}}[[Blue]]| |-[[RESET]][[GREEN]]CXXConstructorDecl[[RESET]][[Yellow]] 0x{{[0-9a-fA-F]*}}[[RESET]] <[[Yellow]]line:28:8[[RESET]]> [[Yellow]]col:8[[RESET]] implicit used constexpr[[CYAN]] Invalid[[RESET]] [[Green]]'void (void) noexcept'[[RESET]] inline
 //CHECK: {{^}}[[Blue]]| | `-[[RESET]][[MAGENTA]]CompoundStmt[[RESET]][[Yellow]] 0x{{[0-9a-fA-F]*}}[[RESET]] <[[Yellow]]col:8[[RESET]]>
-//CHECK: {{^}}[[Blue]]| |-[[RESET]][[GREEN]]CXXConstructorDecl[[RESET]][[Yellow]] 0x{{[0-9a-fA-F]*}}[[RESET]] <[[Yellow]]col:8[[RESET]]> [[Yellow]]col:8[[RESET]] implicit[[CYAN]] Invalid[[RESET]] [[Green]]'void (const struct Invalid &)'[[RESET]] inline noexcept-unevaluated 0x{{[0-9a-fA-F]*}}
+//CHECK: {{^}}[[Blue]]| |-[[RESET]][[GREEN]]CXXConstructorDecl[[RESET]][[Yellow]] 0x{{[0-9a-fA-F]*}}[[RESET]] <[[Yellow]]col:8[[RESET]]> [[Yellow]]col:8[[RESET]] implicit constexpr[[CYAN]] Invalid[[RESET]] [[Green]]'void (const struct Invalid &)'[[RESET]] inline noexcept-unevaluated 0x{{[0-9a-fA-F]*}}
 //CHECK: {{^}}[[Blue]]| | `-[[RESET]][[GREEN]]ParmVarDecl[[RESET]][[Yellow]] 0x{{[0-9a-fA-F]*}}[[RESET]] <[[Yellow]]col:8[[RESET]]> [[Yellow]]col:8[[RESET]] [[Green]]'const struct Invalid &'[[RESET]]
-//CHECK: {{^}}[[Blue]]| `-[[RESET]][[GREEN]]CXXConstructorDecl[[RESET]][[Yellow]] 0x{{[0-9a-fA-F]*}}[[RESET]] <[[Yellow]]col:8[[RESET]]> [[Yellow]]col:8[[RESET]] implicit[[CYAN]] Invalid[[RESET]] [[Green]]'void (struct Invalid &&)'[[RESET]] inline noexcept-unevaluated 0x{{[0-9a-fA-F]*}}
+//CHECK: {{^}}[[Blue]]| `-[[RESET]][[GREEN]]CXXConstructorDecl[[RESET]][[Yellow]] 0x{{[0-9a-fA-F]*}}[[RESET]] <[[Yellow]]col:8[[RESET]]> [[Yellow]]col:8[[RESET]] implicit constexpr[[CYAN]] Invalid[[RESET]] [[Green]]'void (struct Invalid &&)'[[RESET]] inline noexcept-unevaluated 0x{{[0-9a-fA-F]*}}
 //CHECK: {{^}}[[Blue]]|   `-[[RESET]][[GREEN]]ParmVarDecl[[RESET]][[Yellow]] 0x{{[0-9a-fA-F]*}}[[RESET]] <[[Yellow]]col:8[[RESET]]> [[Yellow]]col:8[[RESET]] [[Green]]'struct Invalid &&'[[RESET]]
 //CHECK: {{^}}[[Blue]]`-[[RESET]][[GREEN]]VarDecl[[RESET]][[Yellow]] 0x{{[0-9a-fA-F]*}}[[RESET]] <[[Yellow]]col:1[[RESET]], [[Yellow]]line:30:3[[RESET]]> [[Yellow]]col:3[[RESET]][[CYAN]] Invalid[[RESET]] [[Green]]'struct Invalid':'struct Invalid'[[RESET]]
 //CHECK: {{^}}[[Blue]]  `-[[RESET]][[MAGENTA]]CXXConstructExpr[[RESET]][[Yellow]] 0x{{[0-9a-fA-F]*}}[[RESET]] <[[Yellow]]col:3[[RESET]]> [[Green]]'struct Invalid':'struct Invalid'[[RESET]][[Cyan]][[RESET]][[Cyan]][[RESET]] [[Green]]'void (void) noexcept'[[RESET]]