Wrapped all the most potentially expensive logging calls in a conditional to only do work when actually requested. Commented some logging calls that could potentially write out many megabytes of type dumps.

#include "gen/llvm.h"
#include "ir/irmodule.h"

IrModule::IrModule(Module* module)
{
    M = module;
    dwarfCompileUnit = NULL;
}

IrModule::~IrModule()
{
}