[super speed] Ship --super-ic

Bug: v8:9237
Change-Id: I60b016617d468e6a04ef48998e59c80f58d16863
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2642245Reviewed-by: Leszek Swirski <leszeks@chromium.org>
Reviewed-by: Igor Sheludko <ishell@chromium.org>
Commit-Queue: Marja Hölttä <marja@chromium.org>
Cr-Commit-Position: refs/heads/master@{#72246}

src/flags/flag-definitions.h

@@ -1386,7 +1386,7 @@ DEFINE_INT(max_valid_polymorphic_map_count, 4,
 DEFINE_BOOL(native_code_counters, DEBUG_BOOL,
             "generate extra code for manipulating stats counters")
 
-DEFINE_BOOL(super_ic, false, "use an IC for super property loads")
+DEFINE_BOOL(super_ic, true, "use an IC for super property loads")
 
 // objects.cc
 DEFINE_BOOL(thin_strings, true, "Enable ThinString support")

test/cctest/interpreter/bytecode_expectations/ClassAndSuperClass.golden

@@ -20,18 +20,14 @@ snippet: "
     test();
   })();
 "
-frame size: 5
+frame size: 1
 parameter count: 1
-bytecode array length: 27
+bytecode array length: 17
 bytecodes: [
   /*  104 S> */ B(LdaImmutableCurrentContextSlot), U8(2),
-                B(Star), R(3),
-                B(LdaConstant), U8(0),
-                B(Star), R(4),
-                B(Mov), R(this), R(2),
-  /*  117 E> */ B(CallRuntime), U16(Runtime::kLoadFromSuper), R(2), U8(3),
+  /*  117 E> */ B(LdaNamedPropertyFromSuper), R(this), U8(0), U8(1),
                 B(Star), R(0),
-  /*  117 E> */ B(CallAnyReceiver), R(0), R(this), U8(1), U8(1),
+  /*  117 E> */ B(CallAnyReceiver), R(0), R(this), U8(1), U8(3),
   /*  126 E> */ B(AddSmi), I8(1), U8(0),
   /*  130 S> */ B(Return),
 ]
@@ -58,7 +54,7 @@ snippet: "
 "
 frame size: 4
 parameter count: 1
-bytecode array length: 37
+bytecode array length: 27
 bytecodes: [
   /*  130 S> */ B(LdaImmutableCurrentContextSlot), U8(2),
                 B(Star), R(1),
@@ -69,11 +65,7 @@ bytecodes: [
                 B(Mov), R(this), R(0),
   /*  138 E> */ B(CallRuntime), U16(Runtime::kStoreToSuper), R(0), U8(4),
   /*  143 S> */ B(LdaImmutableCurrentContextSlot), U8(2),
-                B(Star), R(1),
-                B(LdaConstant), U8(0),
-                B(Star), R(2),
-                B(Mov), R(this), R(0),
-  /*  156 E> */ B(CallRuntime), U16(Runtime::kLoadFromSuper), R(0), U8(3),
+  /*  156 E> */ B(LdaNamedPropertyFromSuper), R(this), U8(0), U8(0),
   /*  158 S> */ B(Return),
 ]
 constant pool: [

test/cctest/interpreter/test-bytecode-generator.cc

@@ -2592,10 +2592,6 @@ TEST(ClassDeclarations) {
 }
 
 TEST(ClassAndSuperClass) {
-  // Different bytecodes are generated with and without --future temporarily,
-  // see crbug.com/v8/9237 . TODO(marja): remove this hack once --super-ic is on
-  // by default.
-  FLAG_super_ic = false;
   InitializedIgnitionHandleScope scope;
   BytecodeExpectationsPrinter printer(CcTest::isolate());
   printer.set_wrap(false);