Index: lib/Target/X86/X86InstrInfo.td
===================================================================
--- lib/Target/X86/X86InstrInfo.td
+++ lib/Target/X86/X86InstrInfo.td
@@ -728,6 +728,8 @@
 
 //===----------------------------------------------------------------------===//
 // X86 Instruction Predicate Definitions.
+def TruePredicate : Predicate<"true">;
+
 def HasCMov      : Predicate<"Subtarget->hasCMov()">;
 def NoCMov       : Predicate<"!Subtarget->hasCMov()">;
 
Index: lib/Target/X86/X86InstrSSE.td
===================================================================
--- lib/Target/X86/X86InstrSSE.td
+++ lib/Target/X86/X86InstrSSE.td
@@ -4277,17 +4277,17 @@
 //===---------------------------------------------------------------------===//
 
 defm PCMPEQB : PDI_binop_all<0x74, "pcmpeqb", X86pcmpeq, v16i8, v32i8,
-                             SSE_INTALU_ITINS_P, 1, NoVLX_Or_NoBWI>;
+                             SSE_INTALU_ITINS_P, 1, TruePredicate>;
 defm PCMPEQW : PDI_binop_all<0x75, "pcmpeqw", X86pcmpeq, v8i16, v16i16,
-                             SSE_INTALU_ITINS_P, 1, NoVLX_Or_NoBWI>;
+                             SSE_INTALU_ITINS_P, 1, TruePredicate>;
 defm PCMPEQD : PDI_binop_all<0x76, "pcmpeqd", X86pcmpeq, v4i32, v8i32,
-                             SSE_INTALU_ITINS_P, 1, NoVLX>;
+                             SSE_INTALU_ITINS_P, 1, TruePredicate>;
 defm PCMPGTB : PDI_binop_all<0x64, "pcmpgtb", X86pcmpgt, v16i8, v32i8,
-                             SSE_INTALU_ITINS_P, 0, NoVLX_Or_NoBWI>;
+                             SSE_INTALU_ITINS_P, 0, TruePredicate>;
 defm PCMPGTW : PDI_binop_all<0x65, "pcmpgtw", X86pcmpgt, v8i16, v16i16,
-                             SSE_INTALU_ITINS_P, 0, NoVLX_Or_NoBWI>;
+                             SSE_INTALU_ITINS_P, 0, TruePredicate>;
 defm PCMPGTD : PDI_binop_all<0x66, "pcmpgtd", X86pcmpgt, v4i32, v8i32,
-                             SSE_INTALU_ITINS_P, 0, NoVLX>;
+                             SSE_INTALU_ITINS_P, 0, TruePredicate>;
 
 //===---------------------------------------------------------------------===//
 // SSE2 - Packed Integer Shuffle Instructions
Index: test/CodeGen/X86/avx-isa-check.ll
===================================================================
--- test/CodeGen/X86/avx-isa-check.ll
+++ test/CodeGen/X86/avx-isa-check.ll
@@ -654,3 +654,12 @@
   %res = fsub <4 x float> %x, %a2
   ret <4 x float> %res
 }
+
+define <32 x i8> @test_cmpgtb(<32 x i8> %A) {
+; generate the follow code
+;	vpxor	 %ymm1, %ymm1, %ymm1
+;   vpcmpgtb %ymm0, %ymm1, %ymm0
+  %B = ashr <32 x i8> %A, <i8 7, i8 7, i8 7, i8 7, i8 7, i8 7, i8 7, i8 7, i8 7, i8 7, i8 7, i8 7, i8 7, i8 7, i8 7, i8 7, i8 7, i8 7, i8 7, i8 7, i8 7, i8 7, i8 7, i8 7, i8 7, i8 7, i8 7, i8 7, i8 7, i8 7, i8 7, i8 7>
+  ret <32 x i8> %B
+}
+