JSDocumentDOMJIT.cpp [plain text]
#include "config.h"
#include "JSDocument.h"
#if ENABLE(JIT)
#include "DOMJITAbstractHeapRepository.h"
#include "DOMJITCheckDOM.h"
#include "DOMJITHelpers.h"
#include "Document.h"
#include "JSDOMWrapper.h"
#include "JSElement.h"
#include "JSHTMLElement.h"
#include <JavaScriptCore/Snippet.h>
#include <JavaScriptCore/SnippetParams.h>
namespace WebCore {
using namespace JSC;
Ref<JSC::Snippet> checkSubClassSnippetForJSDocument()
{
return DOMJIT::checkDOM<Document>();
}
Ref<JSC::DOMJIT::CallDOMGetterSnippet> compileDocumentDocumentElementAttribute()
{
Ref<JSC::DOMJIT::CallDOMGetterSnippet> snippet = JSC::DOMJIT::CallDOMGetterSnippet::create();
snippet->numGPScratchRegisters = 1;
snippet->setGenerator([=](CCallHelpers& jit, JSC::SnippetParams& params) {
JSValueRegs result = params[0].jsValueRegs();
GPRReg document = params[1].gpr();
GPRReg globalObject = params[2].gpr();
JSValue globalObjectValue = params[2].value();
GPRReg scratch = params.gpScratch(0);
jit.loadPtr(CCallHelpers::Address(document, JSDocument::offsetOfWrapped()), scratch);
DOMJIT::loadDocumentElement(jit, scratch, scratch);
auto nullCase = jit.branchTestPtr(CCallHelpers::Zero, scratch);
DOMJIT::toWrapper<Element>(jit, params, scratch, globalObject, result, DOMJIT::toWrapperSlow<Element>, globalObjectValue);
auto done = jit.jump();
nullCase.link(&jit);
jit.moveValue(jsNull(), result);
done.link(&jit);
return CCallHelpers::JumpList();
});
snippet->effect = JSC::DOMJIT::Effect::forDef(DOMJIT::AbstractHeapRepository::Document_documentElement);
return snippet;
}
static void loadLocalName(CCallHelpers& jit, GPRReg htmlElement, GPRReg localNameImpl)
{
jit.loadPtr(CCallHelpers::Address(htmlElement, Element::tagQNameMemoryOffset() + QualifiedName::implMemoryOffset()), localNameImpl);
jit.loadPtr(CCallHelpers::Address(localNameImpl, QualifiedName::QualifiedNameImpl::localNameMemoryOffset()), localNameImpl);
}
Ref<JSC::DOMJIT::CallDOMGetterSnippet> compileDocumentBodyAttribute()
{
Ref<JSC::DOMJIT::CallDOMGetterSnippet> snippet = JSC::DOMJIT::CallDOMGetterSnippet::create();
snippet->numGPScratchRegisters = 2;
snippet->setGenerator([=](CCallHelpers& jit, JSC::SnippetParams& params) {
JSValueRegs result = params[0].jsValueRegs();
GPRReg document = params[1].gpr();
GPRReg globalObject = params[2].gpr();
JSValue globalObjectValue = params[2].value();
GPRReg scratch1 = params.gpScratch(0);
GPRReg scratch2 = params.gpScratch(1);
jit.loadPtr(CCallHelpers::Address(document, JSDocument::offsetOfWrapped()), scratch1);
DOMJIT::loadDocumentElement(jit, scratch1, scratch1);
CCallHelpers::JumpList nullCases;
CCallHelpers::JumpList successCases;
nullCases.append(jit.branchTestPtr(CCallHelpers::Zero, scratch1));
nullCases.append(DOMJIT::branchTestIsHTMLFlagOnNode(jit, CCallHelpers::Zero, scratch1));
loadLocalName(jit, scratch1, scratch2);
nullCases.append(jit.branchPtr(CCallHelpers::NotEqual, scratch2, CCallHelpers::TrustedImmPtr(HTMLNames::htmlTag->localName().impl())));
RELEASE_ASSERT(!CAST_OFFSET(Node*, ContainerNode*));
RELEASE_ASSERT(!CAST_OFFSET(Node*, Element*));
RELEASE_ASSERT(!CAST_OFFSET(Node*, HTMLElement*));
jit.loadPtr(CCallHelpers::Address(scratch1, ContainerNode::firstChildMemoryOffset()), scratch1);
CCallHelpers::Label loopStart = jit.label();
nullCases.append(jit.branchTestPtr(CCallHelpers::Zero, scratch1));
auto notHTMLElementCase = DOMJIT::branchTestIsHTMLFlagOnNode(jit, CCallHelpers::Zero, scratch1);
loadLocalName(jit, scratch1, scratch2);
successCases.append(jit.branchPtr(CCallHelpers::Equal, scratch2, CCallHelpers::TrustedImmPtr(HTMLNames::bodyTag->localName().impl())));
successCases.append(jit.branchPtr(CCallHelpers::Equal, scratch2, CCallHelpers::TrustedImmPtr(HTMLNames::framesetTag->localName().impl())));
notHTMLElementCase.link(&jit);
jit.loadPtr(CCallHelpers::Address(scratch1, Node::nextSiblingMemoryOffset()), scratch1);
jit.jump().linkTo(loopStart, &jit);
successCases.link(&jit);
DOMJIT::toWrapper<HTMLElement>(jit, params, scratch1, globalObject, result, DOMJIT::toWrapperSlow<HTMLElement>, globalObjectValue);
auto done = jit.jump();
nullCases.link(&jit);
jit.moveValue(jsNull(), result);
done.link(&jit);
return CCallHelpers::JumpList();
});
snippet->effect = JSC::DOMJIT::Effect::forDef(DOMJIT::AbstractHeapRepository::Document_body);
return snippet;
}
}
#endif