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Unified Diff: src/arm64/full-codegen-arm64.cc

Issue 1136073002: Resolve references to "this" the same way as normal variables (Closed) Base URL: https://chromium.googlesource.com/v8/v8@master
Patch Set: "this" should never be looked up dynamically Created 5 years, 7 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 aee9ddf40329c911a6ab51cb33111d1109d799f4..ab21d023798fb1e5aa10ba374906c5d7a3923510 100644
--- a/src/arm64/full-codegen-arm64.cc
+++ b/src/arm64/full-codegen-arm64.cc
@@ -125,7 +125,7 @@ void FullCodeGenerator::Generate() {
// global proxy when called as functions (without an explicit receiver
// object).
if (is_sloppy(info->language_mode()) && !info->is_native() &&
- info->MayUseThis()) {
+ info->MayUseThis() && info->scope()->has_this_declaration()) {
Label ok;
int receiver_offset = info->scope()->num_parameters() * kXRegSize;
__ Peek(x10, receiver_offset);
@@ -217,8 +217,9 @@ void FullCodeGenerator::Generate() {
__ Str(x0, MemOperand(fp, StandardFrameConstants::kContextOffset));
// Copy any necessary parameters into the context.
int num_parameters = info->scope()->num_parameters();
- for (int i = 0; i < num_parameters; i++) {
- Variable* var = scope()->parameter(i);
+ int first_parameter = info->scope()->has_this_declaration() ? -1 : 0;
+ for (int i = first_parameter; i < num_parameters; i++) {
+ Variable* var = (i == -1) ? scope()->receiver() : scope()->parameter(i);
if (var->IsContextSlot()) {
int parameter_offset = StandardFrameConstants::kCallerSPOffset +
(num_parameters - 1 - i) * kPointerSize;
@@ -2751,8 +2752,9 @@ void FullCodeGenerator::EmitResolvePossiblyDirectEval(int arg_count) {
__ Ldr(x10, MemOperand(fp, JavaScriptFrameConstants::kFunctionOffset));
// Prepare to push the receiver of the enclosing function.
- int receiver_offset = 2 + info_->scope()->num_parameters();
- __ Ldr(x11, MemOperand(fp, receiver_offset * kPointerSize));
+ 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()));
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