[Firtool] Add FlattenModules pass with command-line options #9285
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- Invoke hw::createFlattenModules after createSimpleCanonicalizerPass - Add --enable-hw-flatten-modules flag to enable the pass - Expose all FlattenModules options: inline-empty (default: true), inline-no-outputs, inline-single-use, inline-small, small-threshold, inline-with-state, inline-all - Add comprehensive lit test covering all options
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This PR adds the FlattenModules pass invocation to the
FIRRTLToHWpipeline.Changes in this PR:
--enable-hw-flatten-modulesflag to control the pass, defaulting to disabledFlattenModulesoptions with--hw-inline-emptydefaulting to true