diff --git a/lib/Target/X86/X86InstrExtension.td b/lib/Target/X86/X86InstrExtension.td
index 0d5490a..7766671 100644
--- a/lib/Target/X86/X86InstrExtension.td
+++ b/lib/Target/X86/X86InstrExtension.td
@@ -82,6 +82,7 @@
 // These are the same as the regular MOVZX32rr8 and MOVZX32rm8
 // except that they use GR32_NOREX for the output operand register class
 // instead of GR32. This allows them to operate on h registers on x86-64.
+let neverHasSideEffects = 1, isCodeGenOnly = 1 in {
 def MOVZX32_NOREXrr8 : I<0xB6, MRMSrcReg,
                          (outs GR32_NOREX:$dst), (ins GR8_NOREX:$src),
                          "movz{bl|x}\t{$src, $dst|$dst, $src}",
@@ -91,6 +92,7 @@
                          (outs GR32_NOREX:$dst), (ins i8mem_NOREX:$src),
                          "movz{bl|x}\t{$src, $dst|$dst, $src}",
                          [], IIC_MOVZX>, TB;
+}
 
 // MOVSX64rr8 always has a REX prefix and it has an 8-bit register
 // operand, which makes it a rare instruction with an 8-bit register
diff --git a/utils/TableGen/X86RecognizableInstr.cpp b/utils/TableGen/X86RecognizableInstr.cpp
index 12ad0f2..7ac2336 100644
--- a/utils/TableGen/X86RecognizableInstr.cpp
+++ b/utils/TableGen/X86RecognizableInstr.cpp
@@ -405,8 +405,7 @@
   // printed as a separate "instruction".
 
   if (Name.find("_Int") != Name.npos       ||
-      Name.find("Int_") != Name.npos       ||
-      Name.find("_NOREX") != Name.npos)
+      Name.find("Int_") != Name.npos)
     return FILTER_STRONG;
 
   // Filter out instructions with segment override prefixes.