Index: clang/lib/CodeGen/CGOpenMPRuntime.cpp
===================================================================
--- clang/lib/CodeGen/CGOpenMPRuntime.cpp
+++ clang/lib/CodeGen/CGOpenMPRuntime.cpp
@@ -11123,6 +11123,7 @@
     case llvm::Triple::renderscript32:
     case llvm::Triple::renderscript64:
     case llvm::Triple::ve:
+    case llvm::Triple::xtensa:
       return false;
     }
   }
Index: llvm/include/llvm/ADT/Triple.h
===================================================================
--- llvm/include/llvm/ADT/Triple.h
+++ llvm/include/llvm/ADT/Triple.h
@@ -78,6 +78,7 @@
     x86,            // X86: i[3-9]86
     x86_64,         // X86-64: amd64, x86_64
     xcore,          // XCore: xcore
+    xtensa,         // Tensilica Xtensa
     nvptx,          // NVPTX: 32-bit
     nvptx64,        // NVPTX: 64-bit
     le32,           // le32: generic little-endian 32-bit CPU (PNaCl)
Index: llvm/lib/Support/Triple.cpp
===================================================================
--- llvm/lib/Support/Triple.cpp
+++ llvm/lib/Support/Triple.cpp
@@ -71,6 +71,7 @@
   case x86:            return "i386";
   case x86_64:         return "x86_64";
   case xcore:          return "xcore";
+  case xtensa:         return "xtensa";
   }
 
   llvm_unreachable("Invalid ArchType!");
@@ -147,6 +148,8 @@
   case riscv64:     return "riscv";
 
   case ve:          return "ve";
+
+  case xtensa:      return "xtensa";
   }
 }
 
@@ -317,6 +320,7 @@
     .Case("renderscript32", renderscript32)
     .Case("renderscript64", renderscript64)
     .Case("ve", ve)
+    .Case("xtensa", xtensa)
     .Default(UnknownArch);
 }
 
@@ -446,6 +450,7 @@
     .Case("ve", Triple::ve)
     .Case("wasm32", Triple::wasm32)
     .Case("wasm64", Triple::wasm64)
+    .Case("xtensa", Triple::xtensa)
     .Default(Triple::UnknownArch);
 
   // Some architectures require special parsing logic just to compute the
@@ -706,6 +711,7 @@
   case Triple::thumbeb:
   case Triple::ve:
   case Triple::xcore:
+  case Triple::xtensa:
     return Triple::ELF;
 
   case Triple::ppc64:
@@ -1267,6 +1273,7 @@
   case llvm::Triple::wasm32:
   case llvm::Triple::x86:
   case llvm::Triple::xcore:
+  case llvm::Triple::xtensa:
     return 32;
 
   case llvm::Triple::aarch64:
@@ -1350,6 +1357,7 @@
   case Triple::wasm32:
   case Triple::x86:
   case Triple::xcore:
+  case Triple::xtensa:
     // Already 32-bit.
     break;
 
@@ -1388,6 +1396,7 @@
   case Triple::tce:
   case Triple::tcele:
   case Triple::xcore:
+  case Triple::xtensa:
     T.setArch(UnknownArch);
     break;
 
@@ -1471,6 +1480,7 @@
   case Triple::x86_64:
   case Triple::xcore:
   case Triple::ve:
+  case Triple::xtensa:
 
   // ARM is intentionally unsupported here, changing the architecture would
   // drop any arch suffixes.
@@ -1563,6 +1573,7 @@
   case Triple::x86:
   case Triple::x86_64:
   case Triple::xcore:
+  case Triple::xtensa:
     return true;
   default:
     return false;
Index: llvm/unittests/ADT/TripleTest.cpp
===================================================================
--- llvm/unittests/ADT/TripleTest.cpp
+++ llvm/unittests/ADT/TripleTest.cpp
@@ -579,6 +579,18 @@
   EXPECT_EQ(Triple::UnknownEnvironment, T.getEnvironment());
   EXPECT_TRUE(T.isArch32Bit());
 
+  T = Triple("xtensa");
+  EXPECT_EQ(Triple::xtensa, T.getArch());
+  EXPECT_EQ(Triple::UnknownVendor, T.getVendor());
+  EXPECT_EQ(Triple::UnknownOS, T.getOS());
+  EXPECT_EQ(Triple::UnknownEnvironment, T.getEnvironment());
+
+  T = Triple("xtensa-unknown-unknown");
+  EXPECT_EQ(Triple::xtensa, T.getArch());
+  EXPECT_EQ(Triple::UnknownVendor, T.getVendor());
+  EXPECT_EQ(Triple::UnknownOS, T.getOS());
+  EXPECT_EQ(Triple::UnknownEnvironment, T.getEnvironment());
+
   T = Triple("huh");
   EXPECT_EQ(Triple::UnknownArch, T.getArch());
 }
@@ -904,6 +916,11 @@
   EXPECT_FALSE(T.isArch32Bit());
   EXPECT_TRUE(T.isArch64Bit());
   EXPECT_TRUE(T.isRISCV());
+
+  T.setArch(Triple::xtensa);
+  EXPECT_FALSE(T.isArch16Bit());
+  EXPECT_TRUE(T.isArch32Bit());
+  EXPECT_FALSE(T.isArch64Bit());
 }
 
 TEST(TripleTest, BitWidthArchVariants) {
@@ -1050,6 +1067,10 @@
   T.setArch(Triple::xcore);
   EXPECT_EQ(Triple::xcore, T.get32BitArchVariant().getArch());
   EXPECT_EQ(Triple::UnknownArch, T.get64BitArchVariant().getArch());
+
+  T.setArch(Triple::xtensa);
+  EXPECT_EQ(Triple::xtensa, T.get32BitArchVariant().getArch());
+  EXPECT_EQ(Triple::UnknownArch, T.get64BitArchVariant().getArch());
 }
 
 TEST(TripleTest, EndianArchVariants) {