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grt: complete route flow before failing due to congestion #6076

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grt: complete route flow before failing due to congestion #6076

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eder-matheus
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Fixes #6073.

  • When the design has congestion, grt will complete its flow and save the guides in odb before the error.
  • The -allow_congestion flag is preserved for cases where the user wants to go through drt even with congestion in grt.
  • odb::dbGuide was updated with the is_congested flag. This is used inside drt to ensure that it will not route a design that has global routing congestion. However, when the -allow_congestion flag is used in grt, this flag is set to false.

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clang-tidy review says "All clean, LGTM! 👍"

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@maliberty maliberty Awaiting requested review from maliberty

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GRT: store route guides even when it fails with congestion
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