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Unified Diff: src/arm/full-codegen-arm.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/arm/full-codegen-arm.cc
diff --git a/src/arm/full-codegen-arm.cc b/src/arm/full-codegen-arm.cc
index 0bcb6a79ccd30154943cb7e363ca9fca50f3de6b..6ee8eb1cd68540b417adbabed51221313e3f1f93 100644
--- a/src/arm/full-codegen-arm.cc
+++ b/src/arm/full-codegen-arm.cc
@@ -1698,21 +1698,13 @@ void FullCodeGenerator::VisitObjectLiteral(ObjectLiteral* expr) {
__ ldr(r3, FieldMemOperand(r3, JSFunction::kLiteralsOffset));
__ mov(r2, Operand(Smi::FromInt(expr->literal_index())));
__ mov(r1, Operand(constant_properties));
- int flags = expr->fast_elements()
- ? ObjectLiteral::kFastElements
- : ObjectLiteral::kNoFlags;
- flags |= expr->has_function()
- ? ObjectLiteral::kHasFunction
- : ObjectLiteral::kNoFlags;
+ int flags = expr->ComputeFlags();
__ mov(r0, Operand(Smi::FromInt(flags)));
- 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) {
+ if (MustCreateObjectLiteralWithRuntime(expr)) {
__ Push(r3, r2, r1, r0);
__ CallRuntime(Runtime::kCreateObjectLiteral, 4);
} else {
- FastCloneShallowObjectStub stub(isolate(), properties_count);
+ FastCloneShallowObjectStub stub(isolate(), expr->properties_count());
__ CallStub(&stub);
}
PrepareForBailoutForId(expr->CreateLiteralId(), TOS_REG);
@@ -1904,17 +1896,10 @@ 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_fast_elements = IsFastObjectElementsKind(constant_elements_kind);
+ bool has_fast_elements =
+ IsFastObjectElementsKind(expr->constant_elements_kind());
Handle<FixedArrayBase> constant_elements_values(
FixedArrayBase::cast(constant_elements->get(1)));
@@ -1929,8 +1914,8 @@ void FullCodeGenerator::VisitArrayLiteral(ArrayLiteral* expr) {
__ ldr(r3, FieldMemOperand(r3, JSFunction::kLiteralsOffset));
__ mov(r2, Operand(Smi::FromInt(expr->literal_index())));
__ mov(r1, Operand(constant_elements));
- if (expr->depth() > 1 || length > JSObject::kInitialMaxFastElementArray) {
- __ mov(r0, Operand(Smi::FromInt(flags)));
+ if (MustCreateArrayLiteralWithRuntime(expr)) {
+ __ mov(r0, Operand(Smi::FromInt(expr->ComputeFlags())));
__ Push(r3, r2, r1, r0);
__ CallRuntime(Runtime::kCreateArrayLiteral, 4);
} else {
@@ -1940,6 +1925,8 @@ 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.
@@ -1956,7 +1943,7 @@ void FullCodeGenerator::VisitArrayLiteral(ArrayLiteral* expr) {
}
VisitForAccumulatorValue(subexpr);
- if (IsFastObjectElementsKind(constant_elements_kind)) {
+ if (has_fast_elements) {
int offset = FixedArray::kHeaderSize + (i * kPointerSize);
__ ldr(r6, MemOperand(sp, kPointerSize)); // Copy of array literal.
__ ldr(r1, FieldMemOperand(r6, JSObject::kElementsOffset));
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