Exemplo n.º 1
0
void generateICFastPath(
    State& state, CodeBlock* codeBlock, GeneratedFunction generatedFunction,
    StackMaps::RecordMap& recordMap, DescriptorType& ic, size_t sizeOfIC)
{
    VM& vm = state.graph.m_vm;

    StackMaps::RecordMap::iterator iter = recordMap.find(ic.stackmapID());
    if (iter == recordMap.end()) {
        // It was optimized out.
        return;
    }
    
    Vector<StackMaps::Record>& records = iter->value;
    
    RELEASE_ASSERT(records.size() == ic.m_generators.size());
    
    for (unsigned i = records.size(); i--;) {
        StackMaps::Record& record = records[i];
        auto generator = ic.m_generators[i];

        CCallHelpers fastPathJIT(&vm, codeBlock);
        generator.generateFastPath(fastPathJIT);
        
        char* startOfIC =
            bitwise_cast<char*>(generatedFunction) + record.instructionOffset;
        
        LinkBuffer linkBuffer(vm, fastPathJIT, startOfIC, sizeOfIC);
        // Note: we could handle the !isValid() case. We just don't appear to have a
        // reason to do so, yet.
        RELEASE_ASSERT(linkBuffer.isValid());
        
        MacroAssembler::AssemblerType_T::fillNops(
            startOfIC + linkBuffer.size(), sizeOfIC - linkBuffer.size());
        
        state.finalizer->sideCodeLinkBuffer->link(
            ic.m_slowPathDone[i], CodeLocationLabel(startOfIC + sizeOfIC));
        
        linkBuffer.link(
            generator.slowPathJump(),
            state.finalizer->sideCodeLinkBuffer->locationOf(generator.slowPathBegin()));
        
        generator.finalize(linkBuffer, *state.finalizer->sideCodeLinkBuffer);
    }
}
Exemplo n.º 2
0
void generateICFastPath(
    State& state, CodeBlock* codeBlock, GeneratedFunction generatedFunction,
    StackMaps::RecordMap& recordMap, DescriptorType& ic, size_t sizeOfIC)
{
    VM& vm = state.graph.m_vm;

    StackMaps::RecordMap::iterator iter = recordMap.find(ic.stackmapID());
    if (iter == recordMap.end()) {
        // It was optimized out.
        return;
    }
    
    Vector<StackMaps::Record>& records = iter->value;
    
    RELEASE_ASSERT(records.size() == ic.m_generators.size());
    
    for (unsigned i = records.size(); i--;) {
        StackMaps::Record& record = records[i];
        auto generator = ic.m_generators[i];

        CCallHelpers fastPathJIT(&vm, codeBlock);
        generator.generateFastPath(fastPathJIT);
        
        char* startOfIC =
            bitwise_cast<char*>(generatedFunction) + record.instructionOffset;

        generateInlineIfPossibleOutOfLineIfNot(state, vm, codeBlock, fastPathJIT, startOfIC, sizeOfIC, "inline cache fast path", [&] (LinkBuffer& linkBuffer, CCallHelpers&, bool) {
            state.finalizer->sideCodeLinkBuffer->link(ic.m_slowPathDone[i],
                CodeLocationLabel(startOfIC + sizeOfIC));

            linkBuffer.link(generator.slowPathJump(),
                state.finalizer->sideCodeLinkBuffer->locationOf(generator.slowPathBegin()));

            generator.finalize(linkBuffer, *state.finalizer->sideCodeLinkBuffer);
        });
    }
}