--- a/src/hotspot/cpu/x86/macroAssembler_x86.cpp	Wed Oct 03 17:45:59 2018 +0100
+++ b/src/hotspot/cpu/x86/macroAssembler_x86.cpp	Wed Oct 03 18:46:26 2018 +0200
@@ -3242,8 +3242,9 @@
   }
 }
 
+#ifdef COMPILER2
 void MacroAssembler::setvectmask(Register dst, Register src) {
-  guarantee(PostLoopMultiversioning == true, "must be");
+  guarantee(PostLoopMultiversioning, "must be");
   Assembler::movl(dst, 1);
   Assembler::shlxl(dst, dst, src);
   Assembler::decl(dst);
@@ -3252,9 +3253,10 @@
 }
 
 void MacroAssembler::restorevectmask() {
-  guarantee(PostLoopMultiversioning == true, "must be");
+  guarantee(PostLoopMultiversioning, "must be");
   Assembler::knotwl(k1, k0);
 }
+#endif // COMPILER2
 
 void MacroAssembler::movdbl(XMMRegister dst, AddressLiteral src) {
   if (reachable(src)) {
@@ -5004,12 +5006,15 @@
   // Clear upper bits of YMM registers to avoid SSE <-> AVX transition penalty.
   vzeroupper();
   // Reset k1 to 0xffff.
+
+#ifdef COMPILER2
   if (PostLoopMultiversioning && VM_Version::supports_evex()) {
     push(rcx);
     movl(rcx, 0xffff);
     kmovwl(k1, rcx);
     pop(rcx);
   }
+#endif // COMPILER2
 
 #ifndef _LP64
   // Either restore the x87 floating pointer control word after returning

--- a/src/hotspot/cpu/x86/macroAssembler_x86.hpp	Wed Oct 03 17:45:59 2018 +0100
+++ b/src/hotspot/cpu/x86/macroAssembler_x86.hpp	Wed Oct 03 18:46:26 2018 +0200
@@ -156,9 +156,11 @@
   void incrementq(Register reg, int value = 1);
   void incrementq(Address dst, int value = 1);
 
+#ifdef COMPILER2
   // special instructions for EVEX
   void setvectmask(Register dst, Register src);
   void restorevectmask();
+#endif
 
   // Support optimal SSE move instructions.
   void movflt(XMMRegister dst, XMMRegister src) {