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cmd/compile: add ORESULT, remove OINDREGSP

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This change is mostly cosmetic.

OINDREGSP was used only for reading the results of a function call.
In recognition of that fact, rename it to ORESULT.
Along the way, trim down our handling of it to the bare minimum,
and rely on the increased clarity of ORESULT to inline nodarg.

Passes toolstash-check.

Change-Id: I25b177df4ea54a8e94b1698d044c297b7e453c64
Reviewed-on: https://go-review.googlesource.com/c/go/+/170705
Run-TryBot: Josh Bleecher Snyder <josharian@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Matthew Dempsky <mdempsky@google.com>
This commit is contained in:
Josh Bleecher Snyder 2019-04-05 16:43:08 -07:00
parent e4665da9bc
commit 336f951b07
5 changed files with 174 additions and 39 deletions
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4
src/cmd/compile/internal/gc/syntax.go
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@ -43,7 +43,7 @@ type Node struct {
// Various. Usually an offset into a struct. For example:
// - ONAME nodes that refer to local variables use it to identify their stack frame position.
// - ODOT, ODOTPTR, and OINDREGSP use it to indicate offset relative to their base address.
// - ODOT, ODOTPTR, and ORESULT use it to indicate offset relative to their base address.
// - OSTRUCTKEY uses it to store the named field's offset.
// - Named OLITERALs use it to store their ambient iota value.
// - OINLMARK stores an index into the inlTree data structure.
@ -751,7 +751,7 @@ const (
OVARDEF // variable is about to be fully initialized
OVARKILL // variable is dead
OVARLIVE // variable is alive
OINDREGSP // offset plus indirect of REGSP, such as 8(SP).
ORESULT // result of a function call; Xoffset is stack offset
OINLMARK // start of an inlined body, with file/line of caller. Xoffset is an index into the inline tree.
// arch-specific opcodes