43afcb5c96
The line between ssa.Func and ssa.Config has blurred. Concurrent compilation in the backend will require more precision. This CL lays out an (aspirational) organization. The implementation will come in follow-up CLs, once the organization is settled. ssa.Config holds basic compiler configuration, mostly arch-specific information. It is configured once, early on, and is readonly, so it is safe for concurrent use. ssa.Func is a single-shot object used for compiling a single Func. It is not concurrency-safe and not re-usable. ssa.Cache is a multi-use object used to avoid expensive allocations during compilation. Each ssa.Func is given an ssa.Cache to use. ssa.Cache is not concurrency-safe. Change-Id: Id02809b6f3541541cac6c27bbb598834888ce1cc Reviewed-on: https://go-review.googlesource.com/38160 Reviewed-by: Keith Randall <khr@golang.org>
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