void Node::convertToIdentityOn(Node* child)
{
children.reset();
child1() = child->defaultEdge();
NodeFlags output = canonicalResultRepresentation(this->result());
NodeFlags input = canonicalResultRepresentation(child->result());
if (output == input) {
setOpAndDefaultFlags(Identity);
setResult(output);
return;
}
switch (output) {
case NodeResultDouble:
setOpAndDefaultFlags(DoubleRep);
switch (input) {
case NodeResultInt52:
child1().setUseKind(Int52RepUse);
return;
case NodeResultJS:
child1().setUseKind(NumberUse);
return;
default:
RELEASE_ASSERT_NOT_REACHED();
return;
}
case NodeResultInt52:
setOpAndDefaultFlags(Int52Rep);
switch (input) {
case NodeResultDouble:
child1().setUseKind(DoubleRepAnyIntUse);
return;
case NodeResultJS:
child1().setUseKind(AnyIntUse);
return;
default:
RELEASE_ASSERT_NOT_REACHED();
return;
}
case NodeResultJS:
setOpAndDefaultFlags(ValueRep);
switch (input) {
case NodeResultDouble:
child1().setUseKind(DoubleRepUse);
return;
case NodeResultInt52:
child1().setUseKind(Int52RepUse);
return;
default:
RELEASE_ASSERT_NOT_REACHED();
return;
}
default:
RELEASE_ASSERT_NOT_REACHED();
return;
}
}
void Node::convertToIdentity()
{
RELEASE_ASSERT(child1());
RELEASE_ASSERT(!child2());
NodeFlags result = canonicalResultRepresentation(this->result());
setOpAndDefaultFlags(Identity);
setResult(result);
}
void Node::remove()
{
ASSERT(!(flags() & NodeHasVarArgs));
children = children.justChecks();
setOpAndDefaultFlags(Check);
}
void Node::convertToCallDOM(Graph& graph)
{
ASSERT(op() == Call);
ASSERT(signature());
Edge edges[3];
// Skip the first one. This is callee.
RELEASE_ASSERT(numChildren() <= 4);
for (unsigned i = 1; i < numChildren(); ++i)
edges[i - 1] = graph.varArgChild(this, i);
setOpAndDefaultFlags(CallDOM);
children.setChild1(edges[0]);
children.setChild2(edges[1]);
children.setChild3(edges[2]);
if (!signature()->effect.mustGenerate())
clearFlags(NodeMustGenerate);
}