Index: lib/MC/MCParser/COFFAsmParser.cpp
===================================================================
--- lib/MC/MCParser/COFFAsmParser.cpp
+++ lib/MC/MCParser/COFFAsmParser.cpp
@@ -157,15 +157,16 @@
 
 bool COFFAsmParser::ParseSectionFlags(StringRef FlagsString, unsigned* Flags) {
   enum {
-    None      = 0,
-    Alloc     = 1 << 0,
-    Code      = 1 << 1,
-    Load      = 1 << 2,
-    InitData  = 1 << 3,
-    Shared    = 1 << 4,
-    NoLoad    = 1 << 5,
-    NoRead    = 1 << 6,
-    NoWrite  =  1 << 7
+    None        = 0,
+    Alloc       = 1 << 0,
+    Code        = 1 << 1,
+    Load        = 1 << 2,
+    InitData    = 1 << 3,
+    Shared      = 1 << 4,
+    NoLoad      = 1 << 5,
+    NoRead      = 1 << 6,
+    NoWrite     = 1 << 7,
+    Discardable = 1 << 8,
   };
 
   bool ReadOnlyRemoved = false;
@@ -198,6 +199,10 @@
       SecFlags &= ~Load;
       break;
 
+    case 'D': // discardable
+      SecFlags |= Discardable;
+      break;
+
     case 'r': // read-only
       ReadOnlyRemoved = false;
       SecFlags |= NoWrite;
@@ -249,6 +254,8 @@
     *Flags |= COFF::IMAGE_SCN_CNT_UNINITIALIZED_DATA;
   if (SecFlags & NoLoad)
     *Flags |= COFF::IMAGE_SCN_LNK_REMOVE;
+  if (SecFlags & Discardable)
+    *Flags |= COFF::IMAGE_SCN_MEM_DISCARDABLE;
   if ((SecFlags & NoRead) == 0)
     *Flags |= COFF::IMAGE_SCN_MEM_READ;
   if ((SecFlags & NoWrite) == 0)
@@ -326,7 +333,8 @@
 //   a: Ignored.
 //   b: BSS section (uninitialized data)
 //   d: data section (initialized data)
-//   n: Discardable section
+//   n: "noload" section (removed by linker)
+//   D: Discardable section
 //   r: Readable section
 //   s: Shared section
 //   w: Writable section
Index: lib/MC/MCSectionCOFF.cpp
===================================================================
--- lib/MC/MCSectionCOFF.cpp
+++ lib/MC/MCSectionCOFF.cpp
@@ -64,6 +64,8 @@
     OS << 'n';
   if (getCharacteristics() & COFF::IMAGE_SCN_MEM_SHARED)
     OS << 's';
+  if (getCharacteristics() & COFF::IMAGE_SCN_MEM_DISCARDABLE)
+    OS << 'D';
   OS << '"';
 
   if (getCharacteristics() & COFF::IMAGE_SCN_LNK_COMDAT) {
Index: test/MC/COFF/section.s
===================================================================
--- test/MC/COFF/section.s
+++ test/MC/COFF/section.s
@@ -30,6 +30,7 @@
 .section s_a,"a"; .long 1
 .section s_b,"b"; .long 1
 .section s_d,"d"; .long 1
+.section s_D,"D"; .long 1
 .section s_n,"n"; .long 1
 .section s_r,"r"; .long 1
 .section s_s,"s"; .long 1
@@ -83,6 +84,15 @@
 // CHECK-NEXT:     ]
 // CHECK:        }
 // CHECK:        Section {
+// CHECK:          Name: s_D
+// CHECK:          Characteristics [
+// CHECK-NEXT:       IMAGE_SCN_ALIGN_1BYTES
+// CHECK-NEXT:       IMAGE_SCN_MEM_DISCARDABLE
+// CHECK-NEXT:       IMAGE_SCN_MEM_READ
+// CHECK-NEXT:       IMAGE_SCN_MEM_WRITE
+// CHECK-NEXT:     ]
+// CHECK:        }
+// CHECK:        Section {
 // CHECK:          Name: s_n
 // CHECK:          Characteristics [
 // CHECK-NEXT:       IMAGE_SCN_ALIGN_1BYTES