This moves the fast path of several functions into the header, and
extracts and sinks the slow paths into cold-attributed out-of-line
functions. The result is that the large cold code is separated and the
fast path is easily inlined into callers.
Also does some factoring to have the simplest and most minimal dispatch
to the cold paths throughout.
Benchmark results (./scripts/bench_runner.py --runs=12,
-march=x86-64-v3):
- BM_CompileApiFileDenseDecls<Lang::Carbon, Phase::Parse>/16384: CPU
Time: -7.285%
- BM_CompileApiFileDenseDecls<Lang::Carbon, Phase::Parse>/65536: CPU
Time: -6.995%
- BM_CompileImplFile<Lang::Carbon, Phase::Parse>/16384: CPU Time:
-7.341%
- BM_CompileImplFile<Lang::Carbon, Phase::Parse>/65536: CPU Time:
-5.805%
Assisted-by: Antigravity with various models
Chandler Carruth
22f3cd3539