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Unified Diff: src/arm64/full-codegen-arm64.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/arm64/full-codegen-arm64.cc
diff --git a/src/arm64/full-codegen-arm64.cc b/src/arm64/full-codegen-arm64.cc
index 90b57784d9eb75708bd45229ee63f3874c0ef067..454bf03ddcbd2862c1ea02a5edc63437c020e3fa 100644
--- a/src/arm64/full-codegen-arm64.cc
+++ b/src/arm64/full-codegen-arm64.cc
@@ -2799,21 +2799,17 @@ void FullCodeGenerator::EmitResolvePossiblyDirectEval(int arg_count) {
}
__ Ldr(x10, MemOperand(fp, JavaScriptFrameConstants::kFunctionOffset));
- // Prepare to push the receiver of the enclosing function.
- Variable* this_var = scope()->LookupThis();
- DCHECK_NOT_NULL(this_var);
- __ Ldr(x11, VarOperand(this_var, x11));
// Prepare to push the language mode.
- __ Mov(x12, Smi::FromInt(language_mode()));
+ __ Mov(x11, Smi::FromInt(language_mode()));
// Prepare to push the start position of the scope the calls resides in.
- __ Mov(x13, Smi::FromInt(scope()->start_position()));
+ __ Mov(x12, Smi::FromInt(scope()->start_position()));
// Push.
- __ Push(x9, x10, x11, x12, x13);
+ __ Push(x9, x10, x11, x12);
// Do the runtime call.
- __ CallRuntime(Runtime::kResolvePossiblyDirectEval, 6);
+ __ CallRuntime(Runtime::kResolvePossiblyDirectEval, 5);
}
@@ -2845,9 +2841,8 @@ 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();
@@ -2868,9 +2863,8 @@ void FullCodeGenerator::VisitCall(Call* expr) {
__ Push(x10);
EmitResolvePossiblyDirectEval(arg_count);
- // The runtime call returns a pair of values in x0 (function) and
- // x1 (receiver). Touch up the stack with the right values.
- __ PokePair(x1, x0, arg_count * kPointerSize);
+ // Touch up the stack with the resolved function.
+ __ Poke(x0, (arg_count + 1) * kPointerSize);
PrepareForBailoutForId(expr->EvalOrLookupId(), NO_REGISTERS);
}
@@ -4464,9 +4458,10 @@ void FullCodeGenerator::VisitUnaryOperation(UnaryOperation* expr) {
context()->Plug(x0);
} 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()) {
__ Ldr(x12, GlobalObjectMemOperand());
__ Mov(x11, Operand(var->name()));
@@ -4477,7 +4472,7 @@ 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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