https://github.com/jofrn updated https://github.com/llvm/llvm-project/pull/200350
>From e02f075dbcc6c1be589fbe576e2e01bb400687ee Mon Sep 17 00:00:00 2001 From: jofrn <[email protected]> Date: Fri, 29 May 2026 01:09:16 -0700 Subject: [PATCH] [lit] Add lit.llvm.fn_param shared helper for --param fn= substitutions --- llvm/test/lit.cfg.py | 6 ++++ llvm/utils/lit/lit/llvm/fn_param.py | 46 +++++++++++++++++++++++++++++ 2 files changed, 52 insertions(+) create mode 100644 llvm/utils/lit/lit/llvm/fn_param.py diff --git a/llvm/test/lit.cfg.py b/llvm/test/lit.cfg.py index 09df1e3fd6281..f4b9e8aaed6ef 100644 --- a/llvm/test/lit.cfg.py +++ b/llvm/test/lit.cfg.py @@ -39,6 +39,12 @@ ) config.test_format = lit.formats.ShTest(not use_lit_shell, extra_substitutions) +# --param fn=NAMES narrows compilation to the named functions and their +# transitive dependencies. See lit.llvm.fn_param.install for dispatch details. +from lit.llvm import fn_param + +fn_param.install(config, lit_config) + # suffixes: A list of file extensions to treat as test files. This is overriden # by individual lit.local.cfg files in the test subdirectories. config.suffixes = [".ll", ".c", ".test", ".txt", ".s", ".mir", ".yaml", ".spv"] diff --git a/llvm/utils/lit/lit/llvm/fn_param.py b/llvm/utils/lit/lit/llvm/fn_param.py new file mode 100644 index 0000000000000..48d8400b80155 --- /dev/null +++ b/llvm/utils/lit/lit/llvm/fn_param.py @@ -0,0 +1,46 @@ +"""Shared building blocks for `--param fn=NAMES`-driven lit substitutions. + +Used by `lit.llvm.fn_selection` and `lit.llvm.fn_extract` to narrow compilation +to a subset of functions. Kept here so the two helpers stay short and share +parsing + capture-substitution wiring.""" + +from lit.TestingConfig import SubstituteCaptures + + +def parse_fn_names(lit_config, param="fn"): + """Return the comma-separated list passed via `--param <param>=NAMES`, + or an empty list when the param is absent or empty.""" + val = lit_config.params.get(param) + if not val: + return [] + return [n.strip() for n in val.split(",") if n.strip()] + + +def add_capture_sub(config, pattern, replacement): + """Append a substitution that preserves regex backreferences in `replacement`.""" + config.substitutions.append((pattern, SubstituteCaptures(replacement))) + + +def install(config, lit_config): + """Dispatch `--param fn=NAMES` to the right helper, and ask FileCheck to + drop CHECKs outside the selected CHECK-LABEL sections. + + `--param fn-pass=1` opts into `lit.llvm.fn_selection` (the select-function + pass, opt-only); otherwise `lit.llvm.fn_extract` is used (prepends + llvm-extract, tool-agnostic).""" + names = parse_fn_names(lit_config) + if not names: + return + # Splice `--filter-label=NAMES` after any FileCheck invocation so the + # downstream FileCheck only checks the CHECK-LABEL sections we kept. + add_capture_sub( + config, r"(\S*FileCheck)\b", r"\1 --filter-label=" + ",".join(names) + ) + if lit_config.params.get("fn-pass"): + # from lit.llvm import fn_selection + # fn_selection.install(config, lit_config) + pass + else: + # from lit.llvm import fn_extract + # fn_extract.install(config, lit_config) + pass _______________________________________________ llvm-branch-commits mailing list [email protected] https://lists.llvm.org/cgi-bin/mailman/listinfo/llvm-branch-commits
