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cmd/compile/internal/gc: refactor ACALL Prog creation

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This abstracts creation of ACALL Progs into package gc. The main
benefit of this today is we can refactor away a lot of common
boilerplate code.

Later, once liveness analysis happens on the SSA graph, this will also
provide an easy insertion point for emitting the PCDATA Progs
immediately before call instructions.

Passes toolstash-check -all.

Change-Id: Ia15108ace97201cd84314f1ca916dfeb4f09d61c
Reviewed-on: https://go-review.googlesource.com/38081
Reviewed-by: Keith Randall <khr@golang.org>
This commit is contained in:
Matthew Dempsky 2017-03-10 18:34:41 -08:00
parent 2e7c3b3f55
commit 118b3fe7bb
19 changed files with 88 additions and 285 deletions
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3
src/cmd/compile/internal/gc/go.go
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@ -365,10 +365,11 @@ type Arch struct {
REGSP int
MAXWIDTH int64
Use387 bool // should 386 backend use 387 FP instructions instead of sse2.
Defframe func(*obj.Prog)
Ginsnop func()
Proginfo func(*obj.Prog) ProgInfo
Use387 bool // should 8g use 387 FP instructions instead of sse2.
// SSAMarkMoves marks any MOVXconst ops that need to avoid clobbering flags.
SSAMarkMoves func(*SSAGenState, *ssa.Block)