Change some cmpq to cmpp, times_8 to times_pointer_size for x32 port.

src/x64/macro-assembler-x64.cc

Index: src/x64/macro-assembler-x64.cc
diff --git a/src/x64/macro-assembler-x64.cc b/src/x64/macro-assembler-x64.cc
index 39acf80034019e963f78ffc4b549b83d46a182d3..291181fcdc9a514eece4abe09a67f0ee9f0d4d11 100644
--- a/src/x64/macro-assembler-x64.cc
+++ b/src/x64/macro-assembler-x64.cc
@@ -1100,7 +1100,7 @@ void MacroAssembler::LoadSmiConstant(Register dst, Smi* source) {
   if (emit_debug_code()) {
     Move(dst, Smi::FromInt(kSmiConstantRegisterValue),
          Assembler::RelocInfoNone());
-    cmpq(dst, kSmiConstantRegister);
+    cmpp(dst, kSmiConstantRegister);
     Assert(equal, kUninitializedKSmiConstantRegister);
   }
   int value = source->value();