[all-commits] [llvm/llvm-project] c61ea7: Cache analysis-warning gates by diagnostic state

[Mehdi Amini via All-commits]

  Branch: refs/heads/users/mamini/clang-speed-analysis-warning-gates
  Home:   https://github.com/llvm/llvm-project
  Commit: c61ea75c026b80da141fcfec024faf896fd5c05a
      https://github.com/llvm/llvm-project/commit/c61ea75c026b80da141fcfec024faf896fd5c05a
  Author: Mehdi Amini <joker.eph at gmail.com>
  Date:   2026-09-11 (Fri, 11 Sep 2026)

  Changed paths:
    M clang/include/clang/Sema/AnalysisBasedWarnings.h
    M clang/lib/Sema/AnalysisBasedWarnings.cpp

  Log Message:
  -----------
  Cache analysis-warning gates by diagnostic state

Avoid resolving the same disabled warning groups for every function.
Reuse one cached policy for the lifetime, uninitialized-use,
fallthrough, recursion, noexcept, and logical-error analysis gates.

CTMark O0 (3 samples, CPU 6): 29.439800 s -> 29.457833 s (+0.061%).

Impact on significant TUs in MLIR build time:
- `mlir/lib/RegisterAllDialects.cpp`: 1.5439% fewer retired
  instructions.
- `mlir/lib/Dialect/LLVMIR/IR/NVVMDialect.cpp`: 0.7746% fewer retired
  instructions.

Assisted-by: Codex



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