[turbofan] Byte and word memory operands in x64 cmp/test. Fixes arithmetic_op_8 in assembler-x64.cc

src/compiler/x64/instruction-codes-x64.h

Index: src/compiler/x64/instruction-codes-x64.h
diff --git a/src/compiler/x64/instruction-codes-x64.h b/src/compiler/x64/instruction-codes-x64.h
index 6d5e77cceeda9bfabc829b7dee2570075bfa815e..bd19386d6a489b496f5a0fff301b78c5389923cf 100644
--- a/src/compiler/x64/instruction-codes-x64.h
+++ b/src/compiler/x64/instruction-codes-x64.h
@@ -18,8 +18,12 @@ namespace compiler {
   V(X64And32)                      \
   V(X64Cmp)                        \
   V(X64Cmp32)                      \
+  V(X64Cmp16)                      \
+  V(X64Cmp8)                       \
   V(X64Test)                       \
   V(X64Test32)                     \
+  V(X64Test16)                     \
+  V(X64Test8)                      \
   V(X64Or)                         \
   V(X64Or32)                       \
   V(X64Xor)                        \
@@ -139,7 +143,6 @@ namespace compiler {
   V(X64Poke)                       \
   V(X64StackCheck)
 
-
 // Addressing modes represent the "shape" of inputs to an instruction.
 // Many instructions support multiple addressing modes. Addressing modes
 // are encoded into the InstructionCode of the instruction and tell the