[all-commits] [llvm/llvm-project] aa1f11: [clang][lit] Add option to skip clang-repl checks ...

[Andy Kaylor via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: aa1f119c6dcbf0b4404a88fcaeb34d9c5ca48fb5
      https://github.com/llvm/llvm-project/commit/aa1f119c6dcbf0b4404a88fcaeb34d9c5ca48fb5
  Author: Andy Kaylor <akaylor at nvidia.com>
  Date:   2026-05-27 (Wed, 27 May 2026)

  Changed paths:
    M clang/test/lit.cfg.py

  Log Message:
  -----------
  [clang][lit] Add option to skip clang-repl checks (#199255)

Whenever lit or llvm-lit is invoked to run clang tests, clang-repl is
run at least once to check for host jit capabilities, and possibly
several more times to probe related capabilities. This adds a noticeable
delay before testing starts, especially for debug builds.

This change adds a lit parameter (clang_skip_clang_repl_checks) and an
environment variable check (CLANG_LIT_SKIP_CLANG_REPL_CHECKS) to allow
the clang-repl probes to be skipped. When this option is used, any tests
that rely on jit execution will be reported as unsupported.

This option is intended only to allow quicker targeted testing during
development. It should not be used for comprehensive verification before
submitting a patch.

On my local test system, executing `ninja check-clang-cir-codegen` with
a previously completed debug build took 18 seconds to run 354 tests with
this option and 53 seconds without it. This is the sort of use case I am
targeting -- lit test runs when the clang-repl overhead will constitute
a significant portion of the total time to execute the tests.



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