Truffle/Instrument: new syntax tags for periodically appearing locations.
small comment in SwitchNode
use TTY in BenchmarkCounters
use log level in EffectsClosure
use LIRKind in graalCodeInstaller, support compressed oops in frame states
Truffle: revert to previous iterator implementation, add test case
Truffle: make NeverPartOfCompilationNode a MacroStateSplitNode for better debuggability