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Unified Diff: src/ia32/stub-cache-ia32.cc

Issue 146003006: Revert broken ArrayPop changes (Closed) Base URL: https://v8.googlecode.com/svn/branches/bleeding_edge
Patch Set: Created 6 years, 11 months ago
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Index: src/ia32/stub-cache-ia32.cc
diff --git a/src/ia32/stub-cache-ia32.cc b/src/ia32/stub-cache-ia32.cc
index e76bfb5f3bf87569557897cad25d486e29818070..92b2f9356cb6da87b2d613cb2d596ebe5c6aa468 100644
--- a/src/ia32/stub-cache-ia32.cc
+++ b/src/ia32/stub-cache-ia32.cc
@@ -1616,6 +1616,76 @@ Handle<Code> CallStubCompiler::CompileCallField(Handle<JSObject> object,
}
+Handle<Code> CallStubCompiler::CompileArrayPopCall(
+ Handle<Object> object,
+ Handle<JSObject> holder,
+ Handle<Cell> cell,
+ Handle<JSFunction> function,
+ Handle<String> name,
+ Code::StubType type) {
+ // If object is not an array or is observed or sealed, bail out to regular
+ // call.
+ if (!object->IsJSArray() ||
+ !cell.is_null() ||
+ Handle<JSArray>::cast(object)->map()->is_observed() ||
+ !Handle<JSArray>::cast(object)->map()->is_extensible()) {
+ return Handle<Code>::null();
+ }
+
+ Label miss, return_undefined, call_builtin;
+
+ HandlerFrontendHeader(object, holder, name, RECEIVER_MAP_CHECK, &miss);
+
+ // Get the elements array of the object.
+ __ mov(ebx, FieldOperand(edx, JSArray::kElementsOffset));
+
+ // Check that the elements are in fast mode and writable.
+ __ cmp(FieldOperand(ebx, HeapObject::kMapOffset),
+ Immediate(factory()->fixed_array_map()));
+ __ j(not_equal, &call_builtin);
+
+ // Get the array's length into ecx and calculate new length.
+ __ mov(ecx, FieldOperand(edx, JSArray::kLengthOffset));
+ __ sub(ecx, Immediate(Smi::FromInt(1)));
+ __ j(negative, &return_undefined);
+
+ // Get the last element.
+ STATIC_ASSERT(kSmiTagSize == 1);
+ STATIC_ASSERT(kSmiTag == 0);
+ __ mov(eax, FieldOperand(ebx,
+ ecx, times_half_pointer_size,
+ FixedArray::kHeaderSize));
+ __ cmp(eax, Immediate(factory()->the_hole_value()));
+ __ j(equal, &call_builtin);
+
+ // Set the array's length.
+ __ mov(FieldOperand(edx, JSArray::kLengthOffset), ecx);
+
+ // Fill with the hole.
+ __ mov(FieldOperand(ebx,
+ ecx, times_half_pointer_size,
+ FixedArray::kHeaderSize),
+ Immediate(factory()->the_hole_value()));
+ const int argc = arguments().immediate();
+ __ ret((argc + 1) * kPointerSize);
+
+ __ bind(&return_undefined);
+ __ mov(eax, Immediate(factory()->undefined_value()));
+ __ ret((argc + 1) * kPointerSize);
+
+ __ bind(&call_builtin);
+ __ TailCallExternalReference(
+ ExternalReference(Builtins::c_ArrayPop, isolate()),
+ argc + 1,
+ 1);
+
+ HandlerFrontendFooter(&miss);
+
+ // Return the generated code.
+ return GetCode(type, name);
+}
+
+
Handle<Code> CallStubCompiler::CompileFastApiCall(
const CallOptimization& optimization,
Handle<Object> object,
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