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Unified Diff: src/ia32/full-codegen-ia32.cc

Issue 1037273002: Ensure object literal element boilerplates aren't modified. (Closed) Base URL: https://chromium.googlesource.com/v8/v8.git@master
Patch Set: Added comment and REBASE. Created 5 years, 9 months ago
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Index: src/ia32/full-codegen-ia32.cc
diff --git a/src/ia32/full-codegen-ia32.cc b/src/ia32/full-codegen-ia32.cc
index 357c2df1ced91c522b9ede778957b9ccbb1b1307..1e578b41412e00625fe300bbdb781b2ae8fb57c8 100644
--- a/src/ia32/full-codegen-ia32.cc
+++ b/src/ia32/full-codegen-ia32.cc
@@ -1622,17 +1622,10 @@ void FullCodeGenerator::VisitObjectLiteral(ObjectLiteral* expr) {
expr->BuildConstantProperties(isolate());
Handle<FixedArray> constant_properties = expr->constant_properties();
- int flags = expr->fast_elements()
- ? ObjectLiteral::kFastElements
- : ObjectLiteral::kNoFlags;
- flags |= expr->has_function()
- ? ObjectLiteral::kHasFunction
- : ObjectLiteral::kNoFlags;
- int properties_count = constant_properties->length() / 2;
- if (expr->may_store_doubles() || expr->depth() > 1 ||
- masm()->serializer_enabled() ||
- flags != ObjectLiteral::kFastElements ||
- properties_count > FastCloneShallowObjectStub::kMaximumClonedProperties) {
+ int flags = expr->ComputeFlags();
+ // If any of the keys would store to the elements array, then we shouldn't
+ // allow it.
+ if (MustCreateObjectLiteralWithRuntime(expr)) {
__ mov(edi, Operand(ebp, JavaScriptFrameConstants::kFunctionOffset));
__ push(FieldOperand(edi, JSFunction::kLiteralsOffset));
__ push(Immediate(Smi::FromInt(expr->literal_index())));
@@ -1645,7 +1638,7 @@ void FullCodeGenerator::VisitObjectLiteral(ObjectLiteral* expr) {
__ mov(ebx, Immediate(Smi::FromInt(expr->literal_index())));
__ mov(ecx, Immediate(constant_properties));
__ mov(edx, Immediate(Smi::FromInt(flags)));
- FastCloneShallowObjectStub stub(isolate(), properties_count);
+ FastCloneShallowObjectStub stub(isolate(), expr->properties_count());
__ CallStub(&stub);
}
PrepareForBailoutForId(expr->CreateLiteralId(), TOS_REG);
@@ -1824,20 +1817,9 @@ void FullCodeGenerator::VisitArrayLiteral(ArrayLiteral* expr) {
Comment cmnt(masm_, "[ ArrayLiteral");
expr->BuildConstantElements(isolate());
- int flags = expr->depth() == 1
- ? ArrayLiteral::kShallowElements
- : ArrayLiteral::kNoFlags;
-
- ZoneList<Expression*>* subexprs = expr->values();
- int length = subexprs->length();
Handle<FixedArray> constant_elements = expr->constant_elements();
- DCHECK_EQ(2, constant_elements->length());
- ElementsKind constant_elements_kind =
- static_cast<ElementsKind>(Smi::cast(constant_elements->get(0))->value());
bool has_constant_fast_elements =
- IsFastObjectElementsKind(constant_elements_kind);
- Handle<FixedArrayBase> constant_elements_values(
- FixedArrayBase::cast(constant_elements->get(1)));
+ IsFastObjectElementsKind(expr->constant_elements_kind());
AllocationSiteMode allocation_site_mode = TRACK_ALLOCATION_SITE;
if (has_constant_fast_elements && !FLAG_allocation_site_pretenuring) {
@@ -1846,12 +1828,12 @@ void FullCodeGenerator::VisitArrayLiteral(ArrayLiteral* expr) {
allocation_site_mode = DONT_TRACK_ALLOCATION_SITE;
}
- if (expr->depth() > 1 || length > JSObject::kInitialMaxFastElementArray) {
+ if (MustCreateArrayLiteralWithRuntime(expr)) {
__ mov(ebx, Operand(ebp, JavaScriptFrameConstants::kFunctionOffset));
__ push(FieldOperand(ebx, JSFunction::kLiteralsOffset));
__ push(Immediate(Smi::FromInt(expr->literal_index())));
__ push(Immediate(constant_elements));
- __ push(Immediate(Smi::FromInt(flags)));
+ __ push(Immediate(Smi::FromInt(expr->ComputeFlags())));
__ CallRuntime(Runtime::kCreateArrayLiteral, 4);
} else {
__ mov(ebx, Operand(ebp, JavaScriptFrameConstants::kFunctionOffset));
@@ -1864,6 +1846,8 @@ void FullCodeGenerator::VisitArrayLiteral(ArrayLiteral* expr) {
PrepareForBailoutForId(expr->CreateLiteralId(), TOS_REG);
bool result_saved = false; // Is the result saved to the stack?
+ ZoneList<Expression*>* subexprs = expr->values();
+ int length = subexprs->length();
// Emit code to evaluate all the non-constant subexpressions and to store
// them into the newly cloned array.
@@ -1880,7 +1864,7 @@ void FullCodeGenerator::VisitArrayLiteral(ArrayLiteral* expr) {
}
VisitForAccumulatorValue(subexpr);
- if (IsFastObjectElementsKind(constant_elements_kind)) {
+ if (has_constant_fast_elements) {
// Fast-case array literal with ElementsKind of FAST_*_ELEMENTS, they
// cannot transition and don't need to call the runtime stub.
int offset = FixedArray::kHeaderSize + (i * kPointerSize);
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