Index: clang/lib/CodeGen/CGDebugInfo.cpp
===================================================================
--- clang/lib/CodeGen/CGDebugInfo.cpp
+++ clang/lib/CodeGen/CGDebugInfo.cpp
@@ -3494,6 +3494,9 @@
   if (CGM.getCodeGenOpts().DwarfVersion < 5 && !OMD->isDirectMethod())
     return nullptr;
 
+  if (OMD->isDirectMethod())
+    SPFlags |= llvm::DISubprogram::SPFlagObjCDirect;
+
   // Starting with DWARF V5 method declarations are emitted as children of
   // the interface type.
   auto *ID = dyn_cast_or_null<ObjCInterfaceDecl>(D->getDeclContext());
Index: clang/test/CodeGenObjC/debug-info-direct-method.m
===================================================================
--- clang/test/CodeGenObjC/debug-info-direct-method.m
+++ clang/test/CodeGenObjC/debug-info-direct-method.m
@@ -1,12 +1,17 @@
 // RUN: %clang_cc1 -dwarf-version=5 -emit-llvm -debug-info-kind=limited -w -triple x86_64-apple-darwin10 %s -o - | FileCheck %s
 // RUN: %clang_cc1 -dwarf-version=4 -emit-llvm -debug-info-kind=limited -w -triple x86_64-apple-darwin10 %s -o - | FileCheck %s
+// RUN: %clang_cc1 -dwarf-version=5 -emit-llvm -debug-info-kind=limited -w -triple x86_64-apple-darwin10 %s -o - -DDISABLE_DIRECT | FileCheck --check-prefix=CHECK-DISABLED %s
 
 __attribute__((objc_root_class))
 @interface Root
 @end
 
 @implementation Root
-- (int)getInt __attribute__((objc_direct)) {
+- (int)getInt
+#ifndef DISABLE_DIRECT
+ __attribute__((objc_direct))
+#endif
+{
   return 42;
 }
 @end
@@ -19,3 +24,6 @@
 // CHECK-SAME:             runtimeLang: DW_LANG_ObjC)
 // CHECK: ![[MEMBERS]] = !{![[GETTER:[0-9]+]]}
 // CHECK: ![[GETTER]] = !DISubprogram(name: "-[Root getInt]",
+// CHECK-SAME: spFlags: DISPFlagObjCDirect
+
+// CHECK-DISABLED-NOT: DISPFlagObjCDirect
Index: llvm/include/llvm/BinaryFormat/Dwarf.def
===================================================================
--- llvm/include/llvm/BinaryFormat/Dwarf.def
+++ llvm/include/llvm/BinaryFormat/Dwarf.def
@@ -421,6 +421,7 @@
 HANDLE_DW_AT(0x3feb, APPLE_property_attribute, 0, APPLE)
 HANDLE_DW_AT(0x3fec, APPLE_objc_complete_type, 0, APPLE)
 HANDLE_DW_AT(0x3fed, APPLE_property, 0, APPLE)
+HANDLE_DW_AT(0x3fee, APPLE_objc_direct, 0, APPLE)
 
 // Attribute form encodings.
 HANDLE_DW_FORM(0x01, addr, 2, DWARF)
Index: llvm/include/llvm/IR/DebugInfoFlags.def
===================================================================
--- llvm/include/llvm/IR/DebugInfoFlags.def
+++ llvm/include/llvm/IR/DebugInfoFlags.def
@@ -90,11 +90,12 @@
 // May also utilize this Flag in future, when adding support
 // for defaulted functions
 HANDLE_DISP_FLAG((1u << 9), Deleted)
+HANDLE_DISP_FLAG((1u << 10), ObjCDirect)
 
 #ifdef DISP_FLAG_LARGEST_NEEDED
 // Intended to be used with ADT/BitmaskEnum.h.
 // NOTE: Always must be equal to largest flag, check this when adding new flags.
-HANDLE_DISP_FLAG((1 << 9), Largest)
+HANDLE_DISP_FLAG((1 << 10), Largest)
 #undef DISP_FLAG_LARGEST_NEEDED
 #endif
 
Index: llvm/include/llvm/IR/DebugInfoMetadata.h
===================================================================
--- llvm/include/llvm/IR/DebugInfoMetadata.h
+++ llvm/include/llvm/IR/DebugInfoMetadata.h
@@ -1758,6 +1758,7 @@
   bool isPure() const { return getSPFlags() & SPFlagPure; }
   bool isElemental() const { return getSPFlags() & SPFlagElemental; }
   bool isRecursive() const { return getSPFlags() & SPFlagRecursive; }
+  bool isObjCDirect() const { return getSPFlags() & SPFlagObjCDirect; }
 
   /// Check if this is deleted member function.
   ///
Index: llvm/lib/CodeGen/AsmPrinter/DwarfUnit.cpp
===================================================================
--- llvm/lib/CodeGen/AsmPrinter/DwarfUnit.cpp
+++ llvm/lib/CodeGen/AsmPrinter/DwarfUnit.cpp
@@ -1233,6 +1233,9 @@
        Language == dwarf::DW_LANG_ObjC))
     addFlag(SPDie, dwarf::DW_AT_prototyped);
 
+  if (SP->isObjCDirect())
+    addFlag(SPDie, dwarf::DW_AT_APPLE_objc_direct);
+
   unsigned CC = 0;
   DITypeRefArray Args;
   if (const DISubroutineType *SPTy = SP->getType()) {
Index: llvm/test/DebugInfo/X86/objc_direct.ll
===================================================================
--- /dev/null
+++ llvm/test/DebugInfo/X86/objc_direct.ll
@@ -0,0 +1,122 @@
+; RUN: llc < %s -filetype=obj -o %t
+; RUN: llvm-dwarfdump -v %t | FileCheck %s
+
+; Source code to regenerate:
+; __attribute__((objc_root_class))
+; @interface Root
+; - (int)direct_method __attribute__((objc_direct));
+; @end
+;
+; @implementation Root
+; - (int)direct_method __attribute__((objc_direct)) {
+;   return 42;
+; }
+; @end
+;
+; clang -O0 -g -gdwarf-5 direct.m -c
+
+; CHECK: DW_TAG_subprogram [3]
+; CHECK: DW_AT_APPLE_objc_direct
+; CHECK-SAME: DW_FORM_flag_present
+; CHECK: DW_TAG_formal_parameter [4]
+
+; ModuleID = 'direct.bc'
+source_filename = "direct.m"
+target datalayout = "e-m:o-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128"
+target triple = "x86_64-apple-macosx10.15.0"
+
+%0 = type opaque
+%struct._objc_cache = type opaque
+%struct._class_t = type { %struct._class_t*, %struct._class_t*, %struct._objc_cache*, i8* (i8*, i8*)**, %struct._class_ro_t* }
+%struct._class_ro_t = type { i32, i32, i32, i8*, i8*, %struct.__method_list_t*, %struct._objc_protocol_list*, %struct._ivar_list_t*, i8*, %struct._prop_list_t* }
+%struct.__method_list_t = type { i32, i32, [0 x %struct._objc_method] }
+%struct._objc_method = type { i8*, i8*, i8* }
+%struct._objc_protocol_list = type { i64, [0 x %struct._protocol_t*] }
+%struct._protocol_t = type { i8*, i8*, %struct._objc_protocol_list*, %struct.__method_list_t*, %struct.__method_list_t*, %struct.__method_list_t*, %struct.__method_list_t*, %struct._prop_list_t*, i32, i32, i8**, i8*, %struct._prop_list_t* }
+%struct._ivar_list_t = type { i32, i32, [0 x %struct._ivar_t] }
+%struct._ivar_t = type { i64*, i8*, i8*, i32, i32 }
+%struct._prop_list_t = type { i32, i32, [0 x %struct._prop_t] }
+%struct._prop_t = type { i8*, i8* }
+
+@_objc_empty_cache = external global %struct._objc_cache
+@"OBJC_CLASS_$_Root" = global %struct._class_t { %struct._class_t* @"OBJC_METACLASS_$_Root", %struct._class_t* null, %struct._objc_cache* @_objc_empty_cache, i8* (i8*, i8*)** null, %struct._class_ro_t* @"_OBJC_CLASS_RO_$_Root" }, section "__DATA, __objc_data", align 8
+@"OBJC_METACLASS_$_Root" = global %struct._class_t { %struct._class_t* @"OBJC_METACLASS_$_Root", %struct._class_t* @"OBJC_CLASS_$_Root", %struct._objc_cache* @_objc_empty_cache, i8* (i8*, i8*)** null, %struct._class_ro_t* @"_OBJC_METACLASS_RO_$_Root" }, section "__DATA, __objc_data", align 8
+@OBJC_CLASS_NAME_ = private unnamed_addr constant [5 x i8] c"Root\00", section "__TEXT,__objc_classname,cstring_literals", align 1
+@"_OBJC_METACLASS_RO_$_Root" = internal global %struct._class_ro_t { i32 3, i32 40, i32 40, i8* null, i8* getelementptr inbounds ([5 x i8], [5 x i8]* @OBJC_CLASS_NAME_, i32 0, i32 0), %struct.__method_list_t* null, %struct._objc_protocol_list* null, %struct._ivar_list_t* null, i8* null, %struct._prop_list_t* null }, section "__DATA, __objc_const", align 8
+@"_OBJC_CLASS_RO_$_Root" = internal global %struct._class_ro_t { i32 2, i32 0, i32 0, i8* null, i8* getelementptr inbounds ([5 x i8], [5 x i8]* @OBJC_CLASS_NAME_, i32 0, i32 0), %struct.__method_list_t* null, %struct._objc_protocol_list* null, %struct._ivar_list_t* null, i8* null, %struct._prop_list_t* null }, section "__DATA, __objc_const", align 8
+@"OBJC_LABEL_CLASS_$" = internal global [1 x i8*] [i8* bitcast (%struct._class_t* @"OBJC_CLASS_$_Root" to i8*)], section "__DATA,__objc_classlist,regular,no_dead_strip", align 8
+@llvm.compiler.used = appending global [2 x i8*] [i8* getelementptr inbounds ([5 x i8], [5 x i8]* @OBJC_CLASS_NAME_, i32 0, i32 0), i8* bitcast ([1 x i8*]* @"OBJC_LABEL_CLASS_$" to i8*)], section "llvm.metadata"
+; Function Attrs: noinline optnone ssp uwtable
+define hidden i32 @"\01-[Root direct_method]"(%0* %self, i8* %_cmd) #0 !dbg !24 {
+entry:
+  %retval = alloca i32, align 4
+  %self.addr = alloca %0*, align 8
+  %_cmd.addr = alloca i8*, align 8
+  store %0* %self, %0** %self.addr, align 8
+  call void @llvm.dbg.declare(metadata %0** %self.addr, metadata !25, metadata !DIExpression()), !dbg !27
+  store i8* %_cmd, i8** %_cmd.addr, align 8
+  call void @llvm.dbg.declare(metadata i8** %_cmd.addr, metadata !28, metadata !DIExpression()), !dbg !27
+  %0 = load %0*, %0** %self.addr, align 8, !dbg !30
+  %1 = icmp eq %0* %0, null, !dbg !30
+  br i1 %1, label %objc_direct_method.self_is_nil, label %objc_direct_method.cont, !dbg !30, !prof !31
+
+objc_direct_method.self_is_nil:                   ; preds = %entry
+  %2 = bitcast i32* %retval to i8*, !dbg !30
+  call void @llvm.memset.p0i8.i64(i8* align 4 %2, i8 0, i64 4, i1 false), !dbg !30
+  br label %return, !dbg !30
+
+objc_direct_method.cont:                          ; preds = %entry
+  store i32 42, i32* %retval, align 4, !dbg !32
+  br label %return, !dbg !32
+
+return:                                           ; preds = %objc_direct_method.cont, %objc_direct_method.self_is_nil
+  %3 = load i32, i32* %retval, align 4, !dbg !33
+  ret i32 %3, !dbg !33
+}
+; Function Attrs: nounwind readnone speculatable willreturn
+declare void @llvm.dbg.declare(metadata, metadata, metadata) #1
+; Function Attrs: argmemonly nounwind willreturn
+declare void @llvm.memset.p0i8.i64(i8* nocapture writeonly, i8, i64, i1 immarg) #2
+
+attributes #0 = { noinline optnone ssp uwtable "correctly-rounded-divide-sqrt-fp-math"="false" "disable-tail-calls"="false" "frame-pointer"="all" "less-precise-fpmad"="false" "min-legal-vector-width"="0" "no-infs-fp-math"="false" "no-jump-tables"="false" "no-nans-fp-math"="false" "no-signed-zeros-fp-math"="false" "no-trapping-math"="false" "stack-protector-buffer-size"="8" "target-cpu"="penryn" "target-features"="+cx16,+cx8,+fxsr,+mmx,+sahf,+sse,+sse2,+sse3,+sse4.1,+ssse3,+x87" "unsafe-fp-math"="false" "use-soft-float"="false" }
+attributes #1 = { nounwind readnone speculatable willreturn }
+attributes #2 = { argmemonly nounwind willreturn }
+
+!llvm.dbg.cu = !{!0}
+!llvm.module.flags = !{!14, !15, !16, !17, !18, !19, !20, !21, !22}
+!llvm.ident = !{!23}
+
+!0 = distinct !DICompileUnit(language: DW_LANG_ObjC, file: !1, producer: "clang version 10.0.0 (https://github.com/llvm/llvm-project d6b2f33e2b6338d24cf756ba220939aecc81210d)", isOptimized: false, runtimeVersion: 2, emissionKind: FullDebug, enums: !2, retainedTypes: !3, nameTableKind: None)
+!1 = !DIFile(filename: "direct.m", directory: "/", checksumkind: CSK_MD5, checksum: "6b49fad130344b0011fc0eef65949390")
+!2 = !{}
+!3 = !{!4}
+!4 = !DICompositeType(tag: DW_TAG_structure_type, name: "Root", scope: !1, file: !1, line: 2, flags: DIFlagObjcClassComplete, elements: !5, runtimeLang: DW_LANG_ObjC)
+!5 = !{!6}
+!6 = !DISubprogram(name: "-[Root direct_method]", scope: !4, file: !1, line: 7, type: !7, scopeLine: 7, flags: DIFlagPrototyped, spFlags: DISPFlagObjCDirect, retainedNodes: !2)
+!7 = !DISubroutineType(types: !8)
+!8 = !{!9, !10, !11}
+!9 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
+!10 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !4, size: 64, flags: DIFlagArtificial | DIFlagObjectPointer)
+!11 = !DIDerivedType(tag: DW_TAG_typedef, name: "SEL", file: !1, baseType: !12, flags: DIFlagArtificial)
+!12 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !13, size: 64)
+!13 = !DICompositeType(tag: DW_TAG_structure_type, name: "objc_selector", file: !1, flags: DIFlagFwdDecl)
+!14 = !{i32 1, !"Objective-C Version", i32 2}
+!15 = !{i32 1, !"Objective-C Image Info Version", i32 0}
+!16 = !{i32 1, !"Objective-C Image Info Section", !"__DATA,__objc_imageinfo,regular,no_dead_strip"}
+!17 = !{i32 4, !"Objective-C Garbage Collection", i32 0}
+!18 = !{i32 1, !"Objective-C Class Properties", i32 64}
+!19 = !{i32 7, !"Dwarf Version", i32 5}
+!20 = !{i32 2, !"Debug Info Version", i32 3}
+!21 = !{i32 1, !"wchar_size", i32 4}
+!22 = !{i32 7, !"PIC Level", i32 2}
+!23 = !{!"clang version 10.0.0 (https://github.com/llvm/llvm-project d6b2f33e2b6338d24cf756ba220939aecc81210d)"}
+!24 = distinct !DISubprogram(name: "-[Root direct_method]", scope: !1, file: !1, line: 7, type: !7, scopeLine: 7, flags: DIFlagPrototyped, spFlags: DISPFlagDefinition, unit: !0, declaration: !6, retainedNodes: !2)
+!25 = !DILocalVariable(name: "self", arg: 1, scope: !24, type: !26, flags: DIFlagArtificial | DIFlagObjectPointer)
+!26 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !4, size: 64)
+!27 = !DILocation(line: 0, scope: !24)
+!28 = !DILocalVariable(name: "_cmd", arg: 2, scope: !24, type: !29, flags: DIFlagArtificial)
+!29 = !DIDerivedType(tag: DW_TAG_typedef, name: "SEL", file: !1, baseType: !12)
+!30 = !DILocation(line: 7, column: 1, scope: !24)
+!31 = !{!"branch_weights", i32 1, i32 1048576}
+!32 = !DILocation(line: 8, column: 3, scope: !24)
+!33 = !DILocation(line: 9, column: 1, scope: !24)