IrHydra1 opens dart2js cfg files, but IrHydra2 doesn't anymore.
Produce cfg files by modifying dart2js source: sdk/lib/_internal/compiler/implementation/ssa/tracer.dart
Change
GENERATE_SSA_TRACE to true
Optionally change SSA_TRACE_FILTER to name (like "main").
IrHydra1 opens dart2js cfg files, but IrHydra2 doesn't anymore.
Produce cfg files by modifying dart2js source: sdk/lib/_internal/compiler/implementation/ssa/tracer.dart Change GENERATE_SSA_TRACE to true Optionally change SSA_TRACE_FILTER to name (like "main").