Index: lib/Target/X86/X86InstrInfo.td
===================================================================
--- lib/Target/X86/X86InstrInfo.td
+++ lib/Target/X86/X86InstrInfo.td
@@ -881,6 +881,7 @@
 def HasRTM       : Predicate<"Subtarget->hasRTM()">;
 def HasADX       : Predicate<"Subtarget->hasADX()">;
 def HasSHA       : Predicate<"Subtarget->hasSHA()">;
+def HasSGX       : Predicate<"Subtarget->hasSGX()">;
 def HasPRFCHW    : Predicate<"Subtarget->hasPRFCHW()">;
 def HasRDSEED    : Predicate<"Subtarget->hasRDSEED()">;
 def HasSSEPrefetch : Predicate<"Subtarget->hasSSEPrefetch()">;
Index: lib/Target/X86/X86InstrSGX.td
===================================================================
--- lib/Target/X86/X86InstrSGX.td
+++ lib/Target/X86/X86InstrSGX.td
@@ -15,7 +15,7 @@
 //===----------------------------------------------------------------------===//
 // SGX instructions
 
-let SchedRW = [WriteSystem] in {
+let SchedRW = [WriteSystem], Predicates = [HasSGX] in {
 // ENCLS - Execute an Enclave System Function of Specified Leaf Number
 def ENCLS : I<0x01, MRM_CF, (outs), (ins),
              "encls", []>, TB;
@@ -23,4 +23,8 @@
 // ENCLU - Execute an Enclave User Function of Specified Leaf Number
 def ENCLU : I<0x01, MRM_D7, (outs), (ins),
              "enclu", []>, TB;
+
+// ENCLV - Execute an Enclave VMM Function of Specified Leaf Number
+def ENCLV : I<0x01, MRM_C0, (outs), (ins),
+             "enclv", []>, TB;
 } // SchedRW
Index: lib/Target/X86/X86Subtarget.h
===================================================================
--- lib/Target/X86/X86Subtarget.h
+++ lib/Target/X86/X86Subtarget.h
@@ -640,6 +640,7 @@
   bool hasWBNOINVD() const { return HasWBNOINVD; }
   bool hasRDPID() const { return HasRDPID; }
   bool hasWAITPKG() const { return HasWAITPKG; }
+  bool hasSGX() const { return HasSGX; }
   bool useRetpoline() const { return UseRetpoline; }
   bool useRetpolineExternalThunk() const { return UseRetpolineExternalThunk; }
 
Index: test/MC/Disassembler/X86/x86-32.txt
===================================================================
--- test/MC/Disassembler/X86/x86-32.txt
+++ test/MC/Disassembler/X86/x86-32.txt
@@ -871,3 +871,12 @@
 
 #CHECK: movdir64b (%si), %ax
 0x67 0x66 0x0f 0x38 0xf8 0x04
+
+#CHECK: encls
+0x0f 0x01 0xcf
+
+#CHECK: enclu
+0x0f 0x01 0xd7
+
+#CHECK: enclv
+0x0f 0x01 0xc0
Index: test/MC/Disassembler/X86/x86-64.txt
===================================================================
--- test/MC/Disassembler/X86/x86-64.txt
+++ test/MC/Disassembler/X86/x86-64.txt
@@ -564,3 +564,12 @@
 
 #CHECK: movdir64b 485498096, %eax
 0x67 0x66 0x0f 0x38 0xf8 0x04 0x25 0xf0 0x1c 0xf0 0x1c
+
+#CHECK: encls
+0x0f 0x01 0xcf
+
+#CHECK: enclu
+0x0f 0x01 0xd7
+
+#CHECK: enclv
+0x0f 0x01 0xc0
Index: test/MC/X86/SGX-32.s
===================================================================
--- test/MC/X86/SGX-32.s
+++ /dev/null
@@ -1,10 +0,0 @@
-// RUN: llvm-mc -triple i386-unknown-unknown --show-encoding %s | FileCheck %s
-
-// CHECK: encls 
-// CHECK: encoding: [0x0f,0x01,0xcf]          
-encls 
-
-// CHECK: enclu 
-// CHECK: encoding: [0x0f,0x01,0xd7]          
-enclu 
-
Index: test/MC/X86/SGX-64.s
===================================================================
--- test/MC/X86/SGX-64.s
+++ /dev/null
@@ -1,10 +0,0 @@
-// RUN: llvm-mc -triple x86_64-unknown-unknown --show-encoding %s | FileCheck %s
-
-// CHECK: encls 
-// CHECK: encoding: [0x0f,0x01,0xcf]          
-encls 
-
-// CHECK: enclu 
-// CHECK: encoding: [0x0f,0x01,0xd7]          
-enclu 
-
Index: test/MC/X86/sgx-encoding.s
===================================================================
--- test/MC/X86/sgx-encoding.s
+++ /dev/null
@@ -1,9 +0,0 @@
-// RUN: llvm-mc -triple x86_64-unknown-unknown --show-encoding %s | FileCheck %s
-
-// CHECK: encls
-// CHECK: encoding: [0x0f,0x01,0xcf]
-	encls
-
-// CHECK: enclu
-// CHECK: encoding: [0x0f,0x01,0xd7]
-	enclu
Index: test/MC/X86/x86-32-coverage.s
===================================================================
--- test/MC/X86/x86-32-coverage.s
+++ test/MC/X86/x86-32-coverage.s
@@ -10792,3 +10792,15 @@
 // CHECK: movdir64b (%si), %ax
 // CHECK: # encoding: [0x67,0x66,0x0f,0x38,0xf8,0x04]
           movdir64b (%si), %ax
+
+// CHECK: encls
+// CHECK: encoding: [0x0f,0x01,0xcf]
+encls
+
+// CHECK: enclu
+// CHECK: encoding: [0x0f,0x01,0xd7]
+enclu
+
+// CHECK: enclv
+// CHECK: encoding: [0x0f,0x01,0xc0]
+enclv
Index: test/MC/X86/x86-64.s
===================================================================
--- test/MC/X86/x86-64.s
+++ test/MC/X86/x86-64.s
@@ -1619,6 +1619,18 @@
 // CHECK: # encoding: [0x66,0x44,0x0f,0x38,0xf8,0x3a]
 movdir64b (%rdx), %r15
 
+// CHECK: encls
+// CHECK: encoding: [0x0f,0x01,0xcf]
+encls
+
+// CHECK: enclu
+// CHECK: encoding: [0x0f,0x01,0xd7]
+enclu
+
+// CHECK: enclv
+// CHECK: encoding: [0x0f,0x01,0xc0]
+enclv
+
 //  __asm __volatile(
 //    "pushf        \n\t"
 //    "popf       \n\t"