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

Issue 1179893002: Add script context with context-allocated "const this" (Closed) Base URL: https://chromium.googlesource.com/v8/v8@master
Patch Set: Factor out Variable::HasThisName Created 5 years, 6 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 b7d161193c6ff1ecc693edcf0f1d700a7c5254d5..2440f9838362534dd70a472b133c2670b92824a7 100644
--- a/src/mips/full-codegen-mips.cc
+++ b/src/mips/full-codegen-mips.cc
@@ -3089,21 +3089,15 @@ void FullCodeGenerator::EmitResolvePossiblyDirectEval(int arg_count) {
// t2: the receiver of the enclosing function.
__ lw(t2, MemOperand(fp, JavaScriptFrameConstants::kFunctionOffset));
- // t1: the receiver of the enclosing function.
- Variable* this_var = scope()->LookupThis();
- DCHECK_NOT_NULL(this_var);
- __ lw(t1, VarOperand(this_var, t1));
+ // t1: the language mode.
+ __ li(t1, Operand(Smi::FromInt(language_mode())));
- // t0: the language mode.
- __ li(t0, Operand(Smi::FromInt(language_mode())));
-
- // a1: the start position of the scope the calls resides in.
- __ li(a1, Operand(Smi::FromInt(scope()->start_position())));
+ // t0: the start position of the scope the calls resides in.
+ __ li(t0, Operand(Smi::FromInt(scope()->start_position())));
// Do the runtime call.
- __ Push(t3);
- __ Push(t2, t1, t0, a1);
- __ CallRuntime(Runtime::kResolvePossiblyDirectEval, 6);
+ __ Push(t3, t2, t1, t0);
+ __ CallRuntime(Runtime::kResolvePossiblyDirectEval, 5);
}
@@ -3136,9 +3130,8 @@ void FullCodeGenerator::VisitCall(Call* expr) {
if (call_type == Call::POSSIBLY_EVAL_CALL) {
// In a call to eval, we first call RuntimeHidden_ResolvePossiblyDirectEval
- // to resolve the function we need to call and the receiver of the
- // call. Then we call the resolved function using the given
- // arguments.
+ // to resolve the function we need to call. Then we call the resolved
+ // function using the given arguments.
ZoneList<Expression*>* args = expr->arguments();
int arg_count = args->length();
@@ -3158,10 +3151,8 @@ void FullCodeGenerator::VisitCall(Call* expr) {
__ push(a1);
EmitResolvePossiblyDirectEval(arg_count);
- // The runtime call returns a pair of values in v0 (function) and
- // v1 (receiver). Touch up the stack with the right values.
+ // Touch up the stack with the resolved function.
__ sw(v0, MemOperand(sp, (arg_count + 1) * kPointerSize));
- __ sw(v1, MemOperand(sp, arg_count * kPointerSize));
PrepareForBailoutForId(expr->EvalOrLookupId(), NO_REGISTERS);
}
@@ -4790,9 +4781,10 @@ void FullCodeGenerator::VisitUnaryOperation(UnaryOperation* expr) {
context()->Plug(v0);
} else if (proxy != NULL) {
Variable* var = proxy->var();
- // Delete of an unqualified identifier is disallowed in strict mode
- // but "delete this" is allowed.
- DCHECK(is_sloppy(language_mode()) || var->is_this());
+ // Delete of an unqualified identifier is disallowed in strict mode but
+ // "delete this" is allowed.
+ bool is_this = var->HasThisName(isolate());
+ DCHECK(is_sloppy(language_mode()) || is_this);
if (var->IsUnallocated()) {
__ lw(a2, GlobalObjectOperand());
__ li(a1, Operand(var->name()));
@@ -4803,7 +4795,7 @@ void FullCodeGenerator::VisitUnaryOperation(UnaryOperation* expr) {
} else if (var->IsStackAllocated() || var->IsContextSlot()) {
// Result of deleting non-global, non-dynamic variables is false.
// The subexpression does not have side effects.
- context()->Plug(var->is_this());
+ context()->Plug(is_this);
} else {
// Non-global variable. Call the runtime to try to delete from the
// context where the variable was introduced.
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