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Unified Diff: src/mips/full-codegen-mips.cc

Issue 871693002: MIPS: new classes: change semantics of super(...) call and add new.target to construct stub. (Closed) Base URL: https://chromium.googlesource.com/v8/v8.git@master
Patch Set: Fixed nits. Created 5 years, 11 months ago
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Index: src/mips/full-codegen-mips.cc
diff --git a/src/mips/full-codegen-mips.cc b/src/mips/full-codegen-mips.cc
index de30a347faafb59cf60db05ff2739a39eea9e5da..0856daa2ed62326f197073d671f19b4239c7239b 100644
--- a/src/mips/full-codegen-mips.cc
+++ b/src/mips/full-codegen-mips.cc
@@ -3146,11 +3146,15 @@ void FullCodeGenerator::VisitCall(Call* expr) {
}
}
} else if (call_type == Call::SUPER_CALL) {
- SuperReference* super_ref = callee->AsSuperReference();
- EmitLoadSuperConstructor(super_ref);
- __ Push(result_register());
- VisitForStackValue(super_ref->this_var());
- EmitCall(expr, CallICState::METHOD);
+ if (FLAG_experimental_classes) {
+ EmitSuperConstructorCall(expr);
+ } else {
+ SuperReference* super_ref = callee->AsSuperReference();
+ EmitLoadSuperConstructor(super_ref);
+ __ Push(result_register());
+ VisitForStackValue(super_ref->this_var());
+ EmitCall(expr, CallICState::METHOD);
+ }
} else {
DCHECK(call_type == Call::OTHER_CALL);
// Call to an arbitrary expression not handled specially above.
@@ -3218,6 +3222,51 @@ void FullCodeGenerator::VisitCallNew(CallNew* expr) {
}
+void FullCodeGenerator::EmitSuperConstructorCall(Call* expr) {
+ SuperReference* super_ref = expr->expression()->AsSuperReference();
+ EmitLoadSuperConstructor(super_ref);
+ __ push(result_register());
+
+ // Push the arguments ("left-to-right") on the stack.
+ ZoneList<Expression*>* args = expr->arguments();
+ int arg_count = args->length();
+ for (int i = 0; i < arg_count; i++) {
+ VisitForStackValue(args->at(i));
+ }
+
+ // Call the construct call builtin that handles allocation and
+ // constructor invocation.
+ SetSourcePosition(expr->position());
+
+ // Load function and argument count into a1 and a0.
+ __ li(a0, Operand(arg_count));
+ __ lw(a1, MemOperand(sp, arg_count * kPointerSize));
+
+ // Record call targets in unoptimized code.
+ if (FLAG_pretenuring_call_new) {
+ UNREACHABLE();
+ /* TODO(dslomov): support pretenuring.
+ EnsureSlotContainsAllocationSite(expr->AllocationSiteFeedbackSlot());
+ DCHECK(expr->AllocationSiteFeedbackSlot().ToInt() ==
+ expr->CallNewFeedbackSlot().ToInt() + 1);
+ */
+ }
+
+ __ li(a2, FeedbackVector());
+ __ li(a3, Operand(SmiFromSlot(expr->CallFeedbackSlot())));
+
+ // TODO(dslomov): use a different stub and propagate new.target.
+ CallConstructStub stub(isolate(), RECORD_CONSTRUCTOR_TARGET);
+ __ Call(stub.GetCode(), RelocInfo::CONSTRUCT_CALL);
+
+ RecordJSReturnSite(expr);
+
+ // TODO(dslomov): implement TDZ for `this`.
+ EmitVariableAssignment(super_ref->this_var()->var(), Token::ASSIGN);
+ context()->Plug(v0);
+}
+
+
void FullCodeGenerator::EmitIsSmi(CallRuntime* expr) {
ZoneList<Expression*>* args = expr->arguments();
DCHECK(args->length() == 1);
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