Index: include/llvm/ADT/Triple.h
===================================================================
--- include/llvm/ADT/Triple.h
+++ include/llvm/ADT/Triple.h
@@ -95,7 +95,8 @@
     wasm64,         // WebAssembly with 64-bit pointers
     renderscript32, // 32-bit RenderScript
     renderscript64, // 64-bit RenderScript
-    LastArchType = renderscript64
+    aap,            // AAP architecture
+    LastArchType = aap
   };
   enum SubArchType {
     NoSubArch,
Index: lib/Support/Triple.cpp
===================================================================
--- lib/Support/Triple.cpp
+++ lib/Support/Triple.cpp
@@ -70,6 +70,7 @@
   case wasm64:         return "wasm64";
   case renderscript32: return "renderscript32";
   case renderscript64: return "renderscript64";
+  case aap:            return "aap";
   }
 
   llvm_unreachable("Invalid ArchType!");
@@ -143,6 +144,8 @@
 
   case riscv32:
   case riscv64:     return "riscv";
+
+  case aap:         return "aap";
   }
 }
 
@@ -303,6 +306,7 @@
     .Case("wasm64", wasm64)
     .Case("renderscript32", renderscript32)
     .Case("renderscript64", renderscript64)
+    .Case("aap", aap)
     .Default(UnknownArch);
 }
 
@@ -418,6 +422,7 @@
     .Case("wasm64", Triple::wasm64)
     .Case("renderscript32", Triple::renderscript32)
     .Case("renderscript64", Triple::renderscript64)
+    .Case("aap", Triple::aap)
     .Default(Triple::UnknownArch);
 
   // Some architectures require special parsing logic just to compute the
@@ -610,6 +615,7 @@
       return Triple::COFF;
     return Triple::ELF;
 
+  case Triple::aap:
   case Triple::aarch64_be:
   case Triple::amdgcn:
   case Triple::amdil:
@@ -1160,6 +1166,7 @@
 
   case llvm::Triple::avr:
   case llvm::Triple::msp430:
+  case llvm::Triple::aap:
     return 16;
 
   case llvm::Triple::arm:
@@ -1239,6 +1246,7 @@
   case Triple::msp430:
   case Triple::systemz:
   case Triple::ppc64le:
+  case Triple::aap:
     T.setArch(UnknownArch);
     break;
 
@@ -1307,6 +1315,7 @@
   case Triple::xcore:
   case Triple::sparcel:
   case Triple::shave:
+  case Triple::aap:
     T.setArch(UnknownArch);
     break;
 
@@ -1388,6 +1397,7 @@
   case Triple::xcore:
   case Triple::renderscript32:
   case Triple::renderscript64:
+  case Triple::aap:
 
   // ARM is intentionally unsupported here, changing the architecture would
   // drop any arch suffixes.
@@ -1479,6 +1489,7 @@
   case Triple::tcele:
   case Triple::renderscript32:
   case Triple::renderscript64:
+  case Triple::aap:
     return true;
   default:
     return false;
Index: unittests/ADT/TripleTest.cpp
===================================================================
--- unittests/ADT/TripleTest.cpp
+++ unittests/ADT/TripleTest.cpp
@@ -236,6 +236,18 @@
   EXPECT_EQ(Triple::UnknownOS, T.getOS());
   EXPECT_EQ(Triple::UnknownEnvironment, T.getEnvironment());
 
+  T = Triple("aap-unknown-unknown");
+  EXPECT_EQ(Triple::aap, T.getArch());
+  EXPECT_EQ(Triple::UnknownVendor, T.getVendor());
+  EXPECT_EQ(Triple::UnknownOS, T.getOS());
+  EXPECT_EQ(Triple::UnknownEnvironment, T.getEnvironment());
+
+  T = Triple("aap");
+  EXPECT_EQ(Triple::aap, T.getArch());
+  EXPECT_EQ(Triple::UnknownVendor, T.getVendor());
+  EXPECT_EQ(Triple::UnknownOS, T.getOS());
+  EXPECT_EQ(Triple::UnknownEnvironment, T.getEnvironment());
+
   T = Triple("lanai-unknown-unknown");
   EXPECT_EQ(Triple::lanai, T.getArch());
   EXPECT_EQ(Triple::UnknownVendor, T.getVendor());
@@ -579,6 +591,11 @@
   EXPECT_FALSE(T.isArch32Bit());
   EXPECT_FALSE(T.isArch64Bit());
 
+  T.setArch(Triple::aap);
+  EXPECT_TRUE(T.isArch16Bit());
+  EXPECT_FALSE(T.isArch32Bit());
+  EXPECT_FALSE(T.isArch64Bit());
+
   T.setArch(Triple::lanai);
   EXPECT_FALSE(T.isArch16Bit());
   EXPECT_TRUE(T.isArch32Bit());