[ia32] treat kTagged{Signed,Pointer} as kTagged for memory operands

Bug: chromium:777101
Change-Id: I29260420a855a060348f26138681a842bb31eb20
Reviewed-on: https://chromium-review.googlesource.com/732900
Commit-Queue: Tobias Tebbi <tebbi@chromium.org>
Reviewed-by: Jaroslav Sevcik <jarin@chromium.org>
Cr-Commit-Position: refs/heads/master@{#48860}

src/compiler/ia32/instruction-selector-ia32.cc

@@ -46,8 +46,7 @@ class IA32OperandGenerator final : public OperandGenerator {
       case kIA32Sub:
       case kIA32Cmp:
       case kIA32Test:
-        return rep == MachineRepresentation::kWord32 ||
-               rep == MachineRepresentation::kTagged;
+        return rep == MachineRepresentation::kWord32 || IsAnyTagged(rep);
       case kIA32Cmp16:
       case kIA32Test16:
         return rep == MachineRepresentation::kWord16;