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[dev.regabi] cmd/compile: replace ir.Node with *ir.Name in Liveness

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Passes buildall w/ toolstash -cmp.

Updates #42982

Change-Id: Iad8df321adfd576da070c13ed16a9651d4e59ad8
Reviewed-on: https://go-review.googlesource.com/c/go/+/275352
Trust: Cuong Manh Le <cuong.manhle.vn@gmail.com>
Run-TryBot: Cuong Manh Le <cuong.manhle.vn@gmail.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Matthew Dempsky <mdempsky@google.com>
This commit is contained in:
Cuong Manh Le 2020-12-04 11:07:25 +07:00 committed by Matthew Dempsky
parent 133b03e1c3
commit b75f51c645
1 changed files with 10 additions and 9 deletions
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19
src/cmd/compile/internal/gc/plive.go
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@ -103,8 +103,8 @@ type BlockEffects struct {
type Liveness struct {
fn *ir.Func
f *ssa.Func
vars []ir.Node
idx map[ir.Node]int32
vars []*ir.Name
idx map[*ir.Name]int32
stkptrsize int64
be []BlockEffects
@ -212,14 +212,14 @@ func livenessShouldTrack(n ir.Node) bool {
// getvariables returns the list of on-stack variables that we need to track
// and a map for looking up indices by *Node.
func getvariables(fn *ir.Func) ([]ir.Node, map[ir.Node]int32) {
var vars []ir.Node
func getvariables(fn *ir.Func) ([]*ir.Name, map[*ir.Name]int32) {
var vars []*ir.Name
for _, n := range fn.Dcl {
if livenessShouldTrack(n) {
vars = append(vars, n)
}
}
idx := make(map[ir.Node]int32, len(vars))
idx := make(map[*ir.Name]int32, len(vars))
for i, n := range vars {
idx[n] = int32(i)
}
@ -276,13 +276,14 @@ func (lv *Liveness) valueEffects(v *ssa.Value) (int32, liveEffect) {
return -1, 0
}
nn := n.(*ir.Name)
// AllocFrame has dropped unused variables from
// lv.fn.Func.Dcl, but they might still be referenced by
// OpVarFoo pseudo-ops. Ignore them to prevent "lost track of
// variable" ICEs (issue 19632).
switch v.Op {
case ssa.OpVarDef, ssa.OpVarKill, ssa.OpVarLive, ssa.OpKeepAlive:
if !n.Name().Used() {
if !nn.Name().Used() {
return -1, 0
}
}
@ -305,7 +306,7 @@ func (lv *Liveness) valueEffects(v *ssa.Value) (int32, liveEffect) {
return -1, 0
}
if pos, ok := lv.idx[n]; ok {
if pos, ok := lv.idx[nn]; ok {
return pos, effect
}
return -1, 0
@ -356,7 +357,7 @@ type livenessFuncCache struct {
// Constructs a new liveness structure used to hold the global state of the
// liveness computation. The cfg argument is a slice of *BasicBlocks and the
// vars argument is a slice of *Nodes.
func newliveness(fn *ir.Func, f *ssa.Func, vars []ir.Node, idx map[ir.Node]int32, stkptrsize int64) *Liveness {
func newliveness(fn *ir.Func, f *ssa.Func, vars []*ir.Name, idx map[*ir.Name]int32, stkptrsize int64) *Liveness {
lv := &Liveness{
fn: fn,
f: f,
@ -482,7 +483,7 @@ func onebitwalktype1(t *types.Type, off int64, bv bvec) {
// Generates live pointer value maps for arguments and local variables. The
// this argument and the in arguments are always assumed live. The vars
// argument is a slice of *Nodes.
func (lv *Liveness) pointerMap(liveout bvec, vars []ir.Node, args, locals bvec) {
func (lv *Liveness) pointerMap(liveout bvec, vars []*ir.Name, args, locals bvec) {
for i := int32(0); ; i++ {
i = liveout.Next(i)
if i < 0 {