From 6d8dbba4624c8a453ba13ff009f011f2946422bb Mon Sep 17 00:00:00 2001
From: Lars Knoll <lars.knoll@qt.io>
Date: Sat, 30 Jun 2018 19:19:18 +0200
Subject: Add support for super calls

Implement super call support for class constructor
functions.

Change-Id: I3c64276234689cf4f644b095e0fc8ca1c634ac53
Reviewed-by: Simon Hausmann <simon.hausmann@qt.io>
---
 src/qml/jit/qv4baselinejit.cpp | 9 +++++++++
 src/qml/jit/qv4baselinejit_p.h | 1 +
 src/qml/jit/qv4jithelpers.cpp  | 9 +++++++++
 src/qml/jit/qv4jithelpers_p.h  | 1 +
 4 files changed, 20 insertions(+)

(limited to 'src/qml/jit')

diff --git a/src/qml/jit/qv4baselinejit.cpp b/src/qml/jit/qv4baselinejit.cpp
index 23df04f127..b52350a729 100644
--- a/src/qml/jit/qv4baselinejit.cpp
+++ b/src/qml/jit/qv4baselinejit.cpp
@@ -787,6 +787,15 @@ void BaselineJIT::generate_ConvertThisToObject()
     as->checkException();
 }
 
+void BaselineJIT::generate_LoadSuperConstructor()
+{
+    as->prepareCallWithArgCount(2);
+    as->passRegAsArg(CallData::Function, 1);
+    as->passEngineAsArg(0);
+    JIT_GENERATE_RUNTIME_CALL(Helpers::loadSuperConstructor, Assembler::ResultInAccumulator);
+    as->checkException();
+}
+
 void BaselineJIT::generate_ToObject()
 {
     STORE_ACC();
diff --git a/src/qml/jit/qv4baselinejit_p.h b/src/qml/jit/qv4baselinejit_p.h
index 9fa4aa2cda..26da3d5da3 100644
--- a/src/qml/jit/qv4baselinejit_p.h
+++ b/src/qml/jit/qv4baselinejit_p.h
@@ -159,6 +159,7 @@ public:
     void generate_CreateUnmappedArgumentsObject() override;
     void generate_CreateRestParameter(int argIndex) override;
     void generate_ConvertThisToObject() override;
+    void generate_LoadSuperConstructor() override;
     void generate_ToObject() override;
     void generate_Jump(int offset) override;
     void generate_JumpTrue(int offset) override;
diff --git a/src/qml/jit/qv4jithelpers.cpp b/src/qml/jit/qv4jithelpers.cpp
index f644d8c782..23e3095a85 100644
--- a/src/qml/jit/qv4jithelpers.cpp
+++ b/src/qml/jit/qv4jithelpers.cpp
@@ -69,6 +69,15 @@ ReturnedValue loadGlobalLookup(ExecutionEngine *engine, Function *f, int index)
     return l->globalGetter(l, engine);
 }
 
+ReturnedValue loadSuperConstructor(ExecutionEngine *engine, const Value *t)
+{
+    if (!t->isObject()) {
+        engine->throwTypeError();
+        return Encode::undefined();
+    }
+    return static_cast<const Object *>(t)->getPrototypeOf()->asReturnedValue();
+}
+
 ReturnedValue toObject(ExecutionEngine *engine, const Value &obj)
 {
     if (obj.isObject())
diff --git a/src/qml/jit/qv4jithelpers_p.h b/src/qml/jit/qv4jithelpers_p.h
index bb10d5722b..e0dfdc47d9 100644
--- a/src/qml/jit/qv4jithelpers_p.h
+++ b/src/qml/jit/qv4jithelpers_p.h
@@ -66,6 +66,7 @@ namespace Helpers {
 
 void convertThisToObject(ExecutionEngine *engine, Value *t);
 ReturnedValue loadGlobalLookup(ExecutionEngine *engine, Function *f, int index);
+ReturnedValue loadSuperConstructor(ExecutionEngine *engine, const Value *t);
 ReturnedValue toObject(ExecutionEngine *engine, const Value &obj);
 ReturnedValue exp(const Value &base, const Value &exp);
 ReturnedValue getLookup(ExecutionEngine *engine, Function *f, int index, const Value &base);
-- 
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