[turbofan] Introduce MachineRepresentation to PropertyAccessInfo.

src/compiler/access-builder.cc

Index: src/compiler/access-builder.cc
diff --git a/src/compiler/access-builder.cc b/src/compiler/access-builder.cc
index 26a0150aa43fd713c54462f88eb0e73af1921845..f21e29ae9151918fb879f45b64254dcc7547c562 100644
--- a/src/compiler/access-builder.cc
+++ b/src/compiler/access-builder.cc
@@ -333,7 +333,7 @@ FieldAccess AccessBuilder::ForFixedArrayLength() {
                         FixedArray::kLengthOffset,
                         MaybeHandle<Name>(),
                         TypeCache::Get().kFixedArrayLengthType,
-                        MachineType::AnyTagged(),
+                        MachineType::TaggedSigned(),
                         kNoWriteBarrier};
   return access;
 }
@@ -449,7 +449,7 @@ FieldAccess AccessBuilder::ForStringLength() {
                         String::kLengthOffset,
                         Handle<Name>(),
                         TypeCache::Get().kStringLengthType,
-                        MachineType::AnyTagged(),
+                        MachineType::TaggedSigned(),
                         kNoWriteBarrier};
   return access;
 }