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cmd/compile: document regalloc fields

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Document what the fields of regalloc mean.
Hopefully will help people understand how the register allocator works.

Change-Id: Ic322ed2019cc839b812740afe8cd2cf0b61da046
Reviewed-on: https://go-review.googlesource.com/137016
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
This commit is contained in:
Keith Randall 2018-09-24 12:26:58 -07:00 • committed by Keith Randall
parent fdceb2a11b
commit f493e55723
3 changed files with 19 additions and 4 deletions
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2
src/cmd/compile/internal/ssa/regalloc.go
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@ -150,6 +150,8 @@ type register uint8
const noRegister register = 255
// A regMask encodes a set of machine registers.
// TODO: regMask -> regSet?
type regMask uint64
func (m regMask) String() string {