[all-commits] [llvm/llvm-project] 5f8f1e: [CIR] Fix unreachable block generation in EH flatt...

Andy Kaylor via All-commits all-commits at lists.llvm.org
Tue Mar 3 08:30:04 PST 2026


  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 5f8f1e2afe991cd214bff9b3cb68612f594e8596
      https://github.com/llvm/llvm-project/commit/5f8f1e2afe991cd214bff9b3cb68612f594e8596
  Author: Andy Kaylor <akaylor at nvidia.com>
  Date:   2026-03-03 (Tue, 03 Mar 2026)

  Changed paths:
    M clang/lib/CIR/Dialect/Transforms/FlattenCFG.cpp
    M clang/test/CIR/Transforms/flatten-try-op.cir

  Log Message:
  -----------
  [CIR] Fix unreachable block generation in EH flattening (#184268)

The previous EH CFG flattening implementation would sometimes create
dispatch handlers in unreachable blocks. This seemed OK until I started
implementing the code to lower the flattened CIR to an ABI-specific form
and those weren't getting updated.

This change fixes the flattening code to avoid generating unreachable
blocks.



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