[turbofan] Pseudo-inline instanceof

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 090814756f172763fcb2a7138bb13b59e74e3120..ac0be79225a1a8bae269cf712fab5afc09a5a695 100644
--- a/src/compiler/access-builder.cc
+++ b/src/compiler/access-builder.cc
@@ -131,6 +131,14 @@ FieldAccess AccessBuilder::ForMapInstanceType() {
 
 
 // static
+FieldAccess AccessBuilder::ForMapPrototype() {
+  FieldAccess access = {kTaggedBase, Map::kPrototypeOffset, Handle<Name>(),
+                        Type::TaggedPointer(), kMachAnyTagged};
+  return access;
+}
+
+
+// static
 FieldAccess AccessBuilder::ForStringLength() {
   FieldAccess access = {kTaggedBase, String::kLengthOffset, Handle<Name>(),
                         TypeCache::Get().kStringLengthType, kMachAnyTagged};