PPC: [runtime] Fix ES6 9.2.1 [[Call]] when encountering a classConstructor.

src/ppc/code-stubs-ppc.cc

 // Copyright 2014 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #if V8_TARGET_ARCH_PPC
 
 #include "src/base/bits.h"
 #include "src/bootstrapper.h"
 #include "src/code-stubs.h"
 #include "src/codegen.h"
@@ skipping 1412 matching lines @@
   __ lbz(scratch, FieldMemOperand(function_map, Map::kBitFieldOffset));
   __ TestBit(scratch, Map::kHasNonInstancePrototype, r0);
   __ bne(&slow_case, cr0);
 
   // Ensure that {function} is not bound.
   Register const shared_info = scratch;
   __ LoadP(shared_info,
            FieldMemOperand(function, JSFunction::kSharedFunctionInfoOffset));
   __ lwz(scratch, FieldMemOperand(shared_info,
                                   SharedFunctionInfo::kCompilerHintsOffset));
-  __ TestBit(scratch,
-#if V8_TARGET_ARCH_PPC64
-             SharedFunctionInfo::kBoundFunction,
-#else
-             SharedFunctionInfo::kBoundFunction + kSmiTagSize,
-#endif
-             r0);
+  __ TestBit(scratch, SharedFunctionInfo::kBoundBit, r0);
   __ bne(&slow_case, cr0);
 
   // Get the "prototype" (or initial map) of the {function}.
   __ LoadP(function_prototype,
            FieldMemOperand(function, JSFunction::kPrototypeOrInitialMapOffset));
   __ AssertNotSmi(function_prototype);
 
   // Resolve the prototype if the {function} has an initial map.  Afterwards the
   // {function_prototype} will be either the JSReceiver prototype object or the
   // hole value, which means that no instances of the {function} were created so
@@ skipping 1079 matching lines @@
 
   __ bind(&not_array_function);
 
   CreateWeakCellStub weak_cell_stub(masm->isolate());
   CallStubInRecordCallTarget(masm, &weak_cell_stub, is_super);
   __ bind(&done);
 }
 
 
 static void EmitContinueIfStrictOrNative(MacroAssembler* masm, Label* cont) {
+  // ----------- S t a t e -------------
+  // -- r4 : the function to call
+  // -- r6 : the function's shared function info
+  // -----------------------------------
   // Do not transform the receiver for strict mode functions and natives.
-  __ LoadP(r6, FieldMemOperand(r4, JSFunction::kSharedFunctionInfoOffset));
   __ lwz(r7, FieldMemOperand(r6, SharedFunctionInfo::kCompilerHintsOffset));
-  __ TestBit(r7,
-#if V8_TARGET_ARCH_PPC64
-             SharedFunctionInfo::kStrictModeFunction,
-#else
-             SharedFunctionInfo::kStrictModeFunction + kSmiTagSize,
-#endif
-             r0);
-  __ bne(cont, cr0);
-
-  // Do not transform the receiver for native.
-  __ TestBit(r7,
-#if V8_TARGET_ARCH_PPC64
-             SharedFunctionInfo::kNative,
-#else
-             SharedFunctionInfo::kNative + kSmiTagSize,
-#endif
-             r0);
+  __ andi(r0, r7, Operand((1 << SharedFunctionInfo::kStrictModeBit) |
+                          (1 << SharedFunctionInfo::kNativeBit)));
   __ bne(cont, cr0);
 }
 
 
 static void EmitSlowCase(MacroAssembler* masm, int argc) {
   __ mov(r3, Operand(argc));
   __ Jump(masm->isolate()->builtins()->Call(), RelocInfo::CODE_TARGET);
 }
 
 
 static void EmitWrapCase(MacroAssembler* masm, int argc, Label* cont) {
   // Wrap the receiver and patch it back onto the stack.
   {
     FrameAndConstantPoolScope frame_scope(masm, StackFrame::INTERNAL);
     __ push(r4);
     __ mr(r3, r6);
     ToObjectStub stub(masm->isolate());
     __ CallStub(&stub);
     __ pop(r4);
   }
   __ StoreP(r3, MemOperand(sp, argc * kPointerSize), r0);
   __ b(cont);
 }
 
 
+static void EmitClassConstructorCallCheck(MacroAssembler* masm) {
+  // ----------- S t a t e -------------
+  // -- r4 : the function to call
+  // -- r6 : the function's shared function info
+  // -----------------------------------
+  // ClassConstructor Check: ES6 section 9.2.1 [[Call]]
+  Label non_class_constructor;
+  // Check whether the current function is a classConstructor.
+  __ lwz(r7, FieldMemOperand(r6, SharedFunctionInfo::kCompilerHintsOffset));
+  __ TestBitMask(r7, SharedFunctionInfo::kClassConstructorBits, r0);
+  __ beq(&non_class_constructor, cr0);
+  // If we call a classConstructor Function throw a TypeError
+  // indirectly via the CallFunction builtin.
+  __ Jump(masm->isolate()->builtins()->CallFunction(), RelocInfo::CODE_TARGET);
+  __ bind(&non_class_constructor);
+}
+
+
 static void CallFunctionNoFeedback(MacroAssembler* masm, int argc,
                                    bool needs_checks, bool call_as_method) {
   // r4 : the function to call
   Label slow, wrap, cont;
 
   if (needs_checks) {
     // Check that the function is really a JavaScript function.
     // r4: pushed function (to be verified)
     __ JumpIfSmi(r4, &slow);
 
     // Goto slow case if we do not have a function.
     __ CompareObjectType(r4, r7, r7, JS_FUNCTION_TYPE);
     __ bne(&slow);
   }
 
+  __ LoadP(r6, FieldMemOperand(r4, JSFunction::kSharedFunctionInfoOffset));
+  EmitClassConstructorCallCheck(masm);
+
   // Fast-case: Invoke the function now.
   // r4: pushed function
   ParameterCount actual(argc);
 
   if (call_as_method) {
     if (needs_checks) {
       EmitContinueIfStrictOrNative(masm, &cont);
     }
 
     // Compute the receiver in sloppy mode.
@@ skipping 153 matching lines @@
   // convincing us that we have a monomorphic JSFunction.
   __ JumpIfSmi(r4, &extra_checks_or_miss);
 
   // Increment the call count for monomorphic function calls.
   const int count_offset = FixedArray::kHeaderSize + kPointerSize;
   __ LoadP(r6, FieldMemOperand(r9, count_offset));
   __ AddSmiLiteral(r6, r6, Smi::FromInt(CallICNexus::kCallCountIncrement), r0);
   __ StoreP(r6, FieldMemOperand(r9, count_offset), r0);
 
   __ bind(&have_js_function);
+
+  __ LoadP(r6, FieldMemOperand(r4, JSFunction::kSharedFunctionInfoOffset));
+  EmitClassConstructorCallCheck(masm);
+
   if (CallAsMethod()) {
     EmitContinueIfStrictOrNative(masm, &cont);
     // Compute the receiver in sloppy mode.
     __ LoadP(r6, MemOperand(sp, argc * kPointerSize), r0);
 
     __ JumpIfSmi(r6, &wrap);
     __ CompareObjectType(r6, r7, r7, FIRST_SPEC_OBJECT_TYPE);
     __ blt(&wrap);
 
     __ bind(&cont);
@@ skipping 3081 matching lines @@
                            kStackUnwindSpace, NULL,
                            MemOperand(fp, 6 * kPointerSize), NULL);
 }
 
 
 #undef __
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_TARGET_ARCH_PPC