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[dev.ssa] cmd/compile, etc.: more ARM64 optimizations, and enable SSA by default

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Add more ARM64 optimizations:
- use hardware zero register when it is possible.
- use shifted ops.
  The assembler supports shifted ops but not documented, nor knows
  how to print it. This CL adds them.
- enable fast division.
  This was disabled because it makes the old backend generate slower
  code. But with SSA it generates faster code.

Turn on SSA by default, also adjust tests.

Change-Id: I7794479954c83bb65008dcb457bc1e21d7496da6
Reviewed-on: https://go-review.googlesource.com/26950
Run-TryBot: Cherry Zhang <cherryyz@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: David Chase <drchase@google.com>
This commit is contained in:
Cherry Zhang 2016-08-10 13:24:03 -04:00
parent 94c8e59ae1
commit d99cee79b9
17 changed files with 3458 additions and 35 deletions
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2
test/live.go
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@ -1,4 +1,4 @@
// +build !amd64,!arm,!amd64p32,!386
// +build !amd64,!arm,!amd64p32,!386,!arm64
// errorcheck -0 -l -live -wb=0
// Copyright 2014 The Go Authors. All rights reserved.