c18ff18465
While tinkering with different block orders for the preemptible loop experiment, crashed the register allocator with a "bad" one (these exist). Realized that one knob was controlling two things (register allocation and branch patterns) and decided that life would be simpler if the two orders were independent. Ran some experiments and determined that we have probably, mostly, been optimizing for register allocation effects, not branch effects. Bad block orders for register allocation are somewhat costly. This will also allow separate experimentation with perhaps- better block orders for register allocation. Change-Id: I6ecf2f24cca178b6f8acc0d3c4caaef043c11ed9 Reviewed-on: https://go-review.googlesource.com/47314 Run-TryBot: David Chase <drchase@google.com> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by: Cherry Zhang <cherryyz@google.com> |
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The Go Programming Language
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