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Commit 80f2aff9 authored by Jeremy Jackins's avatar Jeremy Jackins Committed by Ian Lance Taylor
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cmd/compile: clean up C-style variable declarations in plive.go 

Change-Id: I928f51a1fe4830a81d4f5d3eb572785e06a75b77
Reviewed-on: https://go-review.googlesource.com/20581Reviewed-by: default avatarIan Lance Taylor <iant@golang.org>
Run-TryBot: Ian Lance Taylor <iant@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
parent eb4d1be2
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Inline Side-by-side
Showing with 107 additions and 160 deletions
src/cmd/compile/internal/gc/bv.go
View file @ 80f2aff9
......@@ -105,7 +105,7 @@ func bvget(bv Bvec, i int32) int {
// bvnext returns the smallest index >= i for which bvget(bv, i) == 1.
// If there is no such index, bvnext returns -1.
func bvnext(bv Bvec, i int32) int {
func bvnext(bv Bvec, i int32) int32 {
if i >= bv.n {
return -1
}
......@@ -131,7 +131,7 @@ func bvnext(bv Bvec, i int32) int {
i++
}
return int(i)
return i
}
func bvisempty(bv Bvec) bool {
......
src/cmd/compile/internal/gc/plive.go
View file @ 80f2aff9
......@@ -33,16 +33,17 @@ const (
// program order follow the link pointer from the first node and stop after the
// last node has been visited
//
// for(p = bb->first;; p = p->link) {
// for p = bb.first; ; p = p.link {
// ...
// if(p == bb->last)
// break;
// if p == bb.last {
// break
// }
// }
//
// To iterate in reverse program order by following the opt pointer from the
// last node
//
// for(p = bb->last; p != nil; p = p->opt) {
// for p = bb.last; p != nil; p = p.opt {
// ...
// }
type BasicBlock struct {
......@@ -194,10 +195,10 @@ func blockany(bb *BasicBlock, f func(*obj.Prog) bool) bool {
return false
}
// Collects and returns and array of Node*s for functions arguments and local
// Collects and returns a slice of *Nodes for functions arguments and local
// variables.
func getvariables(fn *Node) []*Node {
result := make([]*Node, 0, 0)
var result []*Node
for _, ln := range fn.Func.Dcl {
if ln.Op == ONAME {
// In order for GODEBUG=gcdead=1 to work, each bitmap needs
......@@ -217,7 +218,7 @@ func getvariables(fn *Node) []*Node {
// already, but for some compiler-introduced names it seems not to be,
// so fix that here.
// Later, when we want to find the index of a node in the variables list,
// we will check that n->curfn == curfn and n->opt > 0. Then n->opt - 1
// we will check that n.curfn == curfn and n.opt > 0. Then n.opt - 1
// is the index in the variables list.
ln.SetOpt(nil)
......@@ -244,7 +245,7 @@ func getvariables(fn *Node) []*Node {
return result
}
// A pretty printer for control flow graphs. Takes an array of BasicBlock*s.
// A pretty printer for control flow graphs. Takes a slice of *BasicBlocks.
func printcfg(cfg []*BasicBlock) {
for _, bb := range cfg {
printblock(bb)
......@@ -344,8 +345,6 @@ func isdeferreturn(prog *obj.Prog) bool {
// are implicit successors of the runtime·selectgo call node. The goal of this
// analysis is to add these missing edges to complete the control flow graph.
func addselectgosucc(selectgo *BasicBlock) {
var succ *BasicBlock
pred := selectgo
for {
if len(pred.pred) == 0 {
......@@ -358,7 +357,7 @@ func addselectgosucc(selectgo *BasicBlock) {
if len(pred.succ) != 1 {
Fatalf("select comm case has too many successors")
}
succ = pred.succ[0]
succ := pred.succ[0]
// Its successor should have exactly two successors.
// The drop through should flow to the selectgo block
......@@ -379,8 +378,8 @@ func addselectgosucc(selectgo *BasicBlock) {
}
}
// The entry point for the missing selectgo control flow algorithm. Takes an
// array of BasicBlock*s containing selectgo calls.
// The entry point for the missing selectgo control flow algorithm. Takes a
// slice of *BasicBlocks containing selectgo calls.
func fixselectgo(selectgo []*BasicBlock) {
for _, bb := range selectgo {
addselectgosucc(bb)
......@@ -389,8 +388,8 @@ func fixselectgo(selectgo []*BasicBlock) {
// Constructs a control flow graph from a sequence of instructions. This
// procedure is complicated by various sources of implicit control flow that are
// not accounted for using the standard cfg construction algorithm. Returns an
// array of BasicBlock*s in control flow graph form (basic blocks ordered by
// not accounted for using the standard cfg construction algorithm. Returns a
// slice of *BasicBlocks in control flow graph form (basic blocks ordered by
// their RPO number).
func newcfg(firstp *obj.Prog) []*BasicBlock {
// Reset the opt field of each prog to nil. In the first and second
......@@ -401,13 +400,13 @@ func newcfg(firstp *obj.Prog) []*BasicBlock {
p.Opt = nil
}
// Allocate an array to remember where we have seen selectgo calls.
// Allocate a slice to remember where we have seen selectgo calls.
// These blocks will be revisited to add successor control flow edges.
selectgo := make([]*BasicBlock, 0, 0)
var selectgo []*BasicBlock
// Loop through all instructions identifying branch targets
// and fall-throughs and allocate basic blocks.
cfg := make([]*BasicBlock, 0, 0)
var cfg []*BasicBlock
bb := newblock(firstp)
cfg = append(cfg, bb)
......@@ -501,7 +500,7 @@ func newcfg(firstp *obj.Prog) []*BasicBlock {
reversepostorder(bb, &rpo)
// Sort the basic blocks by their depth first number. The
// array is now a depth-first spanning tree with the first
// slice is now a depth-first spanning tree with the first
// node being the root.
sort.Sort(blockrpocmp(cfg))
......@@ -518,7 +517,7 @@ func newcfg(firstp *obj.Prog) []*BasicBlock {
return cfg
}
// Frees a control flow graph (an array of BasicBlock*s) and all of its leaf
// Frees a control flow graph (a slice of *BasicBlocks) and all of its leaf
// data structures.
func freecfg(cfg []*BasicBlock) {
if len(cfg) > 0 {
......@@ -536,7 +535,7 @@ func isfunny(n *Node) bool {
}
// Computes the effects of an instruction on a set of
// variables. The vars argument is an array of Node*s.
// variables. The vars argument is a slice of *Nodes.
//
// The output vectors give bits for variables:
// uevar - used by this instruction
......@@ -559,7 +558,7 @@ func progeffects(prog *obj.Prog, vars []*Node, uevar Bvec, varkill Bvec, avarini
// the sake of correctness, out arguments must be read. For the
// sake of backtrace quality, we read in arguments as well.
//
// A return instruction with a p->to is a tail return, which brings
// A return instruction with a p.to is a tail return, which brings
// the stack pointer back up (if it ever went down) and then jumps
// to a new function entirely. That form of instruction must read
// all the parameters for correctness, and similarly it must not
......@@ -575,7 +574,7 @@ func progeffects(prog *obj.Prog, vars []*Node, uevar Bvec, varkill Bvec, avarini
// If we added it to uevar too, we'd not see any kill
// and decide that the variable was live entry, which it is not.
// So only use uevar in the non-addrtaken case.
// The p->to.type == thearch.D_NONE limits the bvset to
// The p.to.type == thearch.D_NONE limits the bvset to
// non-tail-call return instructions; see note above
// the for loop for details.
case PPARAMOUT:
......@@ -611,7 +610,7 @@ func progeffects(prog *obj.Prog, vars []*Node, uevar Bvec, varkill Bvec, avarini
case PAUTO, PPARAM, PPARAMOUT:
pos, ok := from.Node.(*Node).Opt().(int32) // index in vars
if !ok {
goto Next
break
}
if pos >= int32(len(vars)) || vars[pos] != from.Node {
Fatalf("bad bookkeeping in liveness %v %d", Nconv(from.Node.(*Node), 0), pos)
......@@ -632,7 +631,6 @@ func progeffects(prog *obj.Prog, vars []*Node, uevar Bvec, varkill Bvec, avarini
}
}
Next:
if prog.Info.Flags&(RightRead|RightWrite|RightAddr) != 0 {
to := &prog.To
if to.Node != nil && to.Sym != nil && ((to.Node).(*Node)).Name.Curfn == Curfn {
......@@ -676,14 +674,15 @@ Next:
}
// Constructs a new liveness structure used to hold the global state of the
// liveness computation. The cfg argument is an array of BasicBlock*s and the
// vars argument is an array of Node*s.
// liveness computation. The cfg argument is a slice of *BasicBlocks and the
// vars argument is a slice of *Nodes.
func newliveness(fn *Node, ptxt *obj.Prog, cfg []*BasicBlock, vars []*Node) *Liveness {
result := new(Liveness)
result.fn = fn
result.ptxt = ptxt
result.cfg = cfg
result.vars = vars
result := Liveness{
fn: fn,
ptxt: ptxt,
cfg: cfg,
vars: vars,
}
nblocks := int32(len(cfg))
nvars := int32(len(vars))
......@@ -697,17 +696,7 @@ func newliveness(fn *Node, ptxt *obj.Prog, cfg []*BasicBlock, vars []*Node) *Liv
bb.avarinitany = bulk.next()
bb.avarinitall = bulk.next()
}
result.livepointers = make([]Bvec, 0, 0)
result.argslivepointers = make([]Bvec, 0, 0)
return result
}
// Frees the liveness structure and all of its leaf data structures.
func freeliveness(lv *Liveness) {
if lv == nil {
Fatalf("freeliveness: cannot free nil")
}
return &result
}
func printeffects(p *obj.Prog, uevar Bvec, varkill Bvec, avarinit Bvec) {
......@@ -736,7 +725,7 @@ func printnode(node *Node) {
fmt.Printf(" %v%s%s", node, p, a)
}
// Pretty print a list of variables. The vars argument is an array of Node*s.
// Pretty print a list of variables. The vars argument is a slice of *Nodes.
func printvars(name string, bv Bvec, vars []*Node) {
fmt.Printf("%s:", name)
for i, node := range vars {
......@@ -820,9 +809,8 @@ func checkparam(fn *Node, p *obj.Prog, n *Node) {
if isfunny(n) {
return
}
var class Class
for _, a := range fn.Func.Dcl {
class = a.Class &^ PHEAP
class := a.Class &^ PHEAP
if a.Op == ONAME && (class == PPARAM || class == PPARAMOUT) && a == n {
return
}
......@@ -930,7 +918,7 @@ func onebitwalktype1(t *Type, xoffset *int64, bv Bvec) {
*xoffset += t.Width
case TARRAY:
// The value of t->bound is -1 for slices types and >=0 for
// The value of t.bound is -1 for slices types and >=0 for
// for fixed array types. All other values are invalid.
if t.Bound < -1 {
Fatalf("onebitwalktype1: invalid bound, %v", t)
......@@ -949,10 +937,9 @@ func onebitwalktype1(t *Type, xoffset *int64, bv Bvec) {
}
case TSTRUCT:
o := int64(0)
var fieldoffset int64
var o int64
for t1, it := IterFields(t); t1 != nil; t1 = it.Next() {
fieldoffset = t1.Width
fieldoffset := t1.Width
*xoffset += fieldoffset - o
onebitwalktype1(t1.Type, xoffset, bv)
o = fieldoffset + t1.Type.Width
......@@ -977,17 +964,16 @@ func argswords() int32 {
// 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 an array of Node*s.
// argument is a slice of *Nodes.
func onebitlivepointermap(lv *Liveness, liveout Bvec, vars []*Node, args Bvec, locals Bvec) {
var node *Node
var xoffset int64
for i := int32(0); ; i++ {
i = int32(bvnext(liveout, i))
i = bvnext(liveout, i)
if i < 0 {
break
}
node = vars[i]
node := vars[i]
switch node.Class {
case PAUTO:
xoffset = node.Xoffset + stkptrsize
......@@ -1028,9 +1014,7 @@ func unlinkedprog(as obj.As) *obj.Prog {
// Construct a new PCDATA instruction associated with and for the purposes of
// covering an existing instruction.
func newpcdataprog(prog *obj.Prog, index int32) *obj.Prog {
var from Node
var to Node
var from, to Node
Nodconst(&from, Types[TINT32], obj.PCDATA_StackMapIndex)
Nodconst(&to, Types[TINT32], int64(index))
pcdata := unlinkedprog(obj.APCDATA)
......@@ -1204,15 +1188,6 @@ func islive(n *Node, args Bvec, locals Bvec) bool {
// Visits all instructions in a basic block and computes a bit vector of live
// variables at each safe point locations.
func livenessepilogue(lv *Liveness) {
var pred *BasicBlock
var args Bvec
var locals Bvec
var n *Node
var p *obj.Prog
var j int32
var pos int32
var xoffset int64
nvars := int32(len(lv.vars))
livein := bvalloc(nvars)
liveout := bvalloc(nvars)
......@@ -1222,8 +1197,6 @@ func livenessepilogue(lv *Liveness) {
any := bvalloc(nvars)
all := bvalloc(nvars)
ambig := bvalloc(localswords())
nmsg := int32(0)
startmsg := int32(0)
for _, bb := range lv.cfg {
// Compute avarinitany and avarinitall for entry to block.
......@@ -1232,8 +1205,8 @@ func livenessepilogue(lv *Liveness) {
bvresetall(any)
bvresetall(all)
for j = 0; j < int32(len(bb.pred)); j++ {
pred = bb.pred[j]
for j := 0; j < len(bb.pred); j++ {
pred := bb.pred[j]
if j == 0 {
bvcopy(any, pred.avarinitany)
bvcopy(all, pred.avarinitall)
......@@ -1246,7 +1219,7 @@ func livenessepilogue(lv *Liveness) {
// Walk forward through the basic block instructions and
// allocate liveness maps for those instructions that need them.
// Seed the maps with information about the addrtaken variables.
for p = bb.first; ; p = p.Link {
for p := bb.first; ; p = p.Link {
progeffects(p, lv.vars, uevar, varkill, avarinit)
bvandnot(any, any, varkill)
bvandnot(all, all, varkill)
......@@ -1261,12 +1234,12 @@ func livenessepilogue(lv *Liveness) {
bvandnot(liveout, any, all)
if !bvisempty(liveout) {
for pos = 0; pos < liveout.n; pos++ {
for pos := int32(0); pos < liveout.n; pos++ {
if bvget(liveout, pos) == 0 {
continue
}
bvset(all, pos) // silence future warnings in this block
n = lv.vars[pos]
n := lv.vars[pos]
if !n.Name.Needzero {
n.Name.Needzero = true
if debuglive >= 1 {
......@@ -1274,7 +1247,7 @@ func livenessepilogue(lv *Liveness) {
}
// Record in 'ambiguous' bitmap.
xoffset = n.Xoffset + stkptrsize
xoffset := n.Xoffset + stkptrsize
onebitwalktype1(n.Type, &xoffset, ambig)
}
......@@ -1285,10 +1258,10 @@ func livenessepilogue(lv *Liveness) {
// value we are tracking.
// Live stuff first.
args = bvalloc(argswords())
args := bvalloc(argswords())
lv.argslivepointers = append(lv.argslivepointers, args)
locals = bvalloc(localswords())
locals := bvalloc(localswords())
lv.livepointers = append(lv.livepointers, locals)
if debuglive >= 3 {
......@@ -1312,22 +1285,20 @@ func livenessepilogue(lv *Liveness) {
bb.lastbitmapindex = len(lv.livepointers) - 1
}
var fmt_ string
var next *obj.Prog
var numlive int32
var msg []string
var nmsg, startmsg int
for _, bb := range lv.cfg {
if debuglive >= 1 && Curfn.Func.Nname.Sym.Name != "init" && Curfn.Func.Nname.Sym.Name[0] != '.' {
nmsg = int32(len(lv.livepointers))
nmsg = len(lv.livepointers)
startmsg = nmsg
msg = make([]string, nmsg)
for j = 0; j < nmsg; j++ {
for j := 0; j < nmsg; j++ {
msg[j] = ""
}
}
// walk backward, emit pcdata and populate the maps
pos = int32(bb.lastbitmapindex)
pos := int32(bb.lastbitmapindex)
if pos < 0 {
// the first block we encounter should have the ATEXT so
......@@ -1336,8 +1307,9 @@ func livenessepilogue(lv *Liveness) {
}
bvcopy(livein, bb.liveout)
for p = bb.last; p != nil; p = next {
next = p.Opt.(*obj.Prog) // splicebefore modifies p->opt
var next *obj.Prog
for p := bb.last; p != nil; p = next {
next = p.Opt.(*obj.Prog) // splicebefore modifies p.opt
// Propagate liveness information
progeffects(p, lv.vars, uevar, varkill, avarinit)
......@@ -1361,11 +1333,11 @@ func livenessepilogue(lv *Liveness) {
// the only things that can possibly be live are the
// input parameters.
if p.As == obj.ATEXT {
for j = 0; j < liveout.n; j++ {
for j := int32(0); j < liveout.n; j++ {
if bvget(liveout, j) == 0 {
continue
}
n = lv.vars[j]
n := lv.vars[j]
if n.Class != PPARAM {
yyerrorl(p.Lineno, "internal error: %v %v recorded as live on entry, p.Pc=%v", Curfn.Func.Nname, Nconv(n, obj.FmtLong), p.Pc)
}
......@@ -1373,9 +1345,9 @@ func livenessepilogue(lv *Liveness) {
}
// Record live pointers.
args = lv.argslivepointers[pos]
args := lv.argslivepointers[pos]
locals = lv.livepointers[pos]
locals := lv.livepointers[pos]
onebitlivepointermap(lv, liveout, lv.vars, args, locals)
// Ambiguously live variables are zeroed immediately after
......@@ -1390,8 +1362,7 @@ func livenessepilogue(lv *Liveness) {
// include the bits added by the avarinit logic in the
// previous loop.
if msg != nil {
fmt_ = ""
fmt_ += fmt.Sprintf("%v: live at ", p.Line())
fmt_ := fmt.Sprintf("%v: live at ", p.Line())
if p.As == obj.ACALL && p.To.Sym != nil {
name := p.To.Sym.Name
i := strings.Index(name, ".")
......@@ -1404,9 +1375,9 @@ func livenessepilogue(lv *Liveness) {
} else {
fmt_ += fmt.Sprintf("entry to %s:", ((p.From.Node).(*Node)).Sym.Name)
}
numlive = 0
for j = 0; j < int32(len(lv.vars)); j++ {
n = lv.vars[j]
numlive := 0
for j := 0; j < len(lv.vars); j++ {
n := lv.vars[j]
if islive(n, args, locals) {
fmt_ += fmt.Sprintf(" %v", n)
numlive++
......@@ -1450,7 +1421,7 @@ func livenessepilogue(lv *Liveness) {
}
if msg != nil {
for j = startmsg; j < nmsg; j++ {
for j := startmsg; j < nmsg; j++ {
if msg[j] != "" {
fmt.Printf("%s", msg[j])
}
......@@ -1472,11 +1443,9 @@ const (
)
func hashbitmap(h uint32, bv Bvec) uint32 {
var w uint32
n := int((bv.n + 31) / 32)
for i := 0; i < n; i++ {
w = bv.b[i]
w := bv.b[i]
h = (h * Hp) ^ (w & 0xff)
h = (h * Hp) ^ ((w >> 8) & 0xff)
h = (h * Hp) ^ ((w >> 16) & 0xff)
......@@ -1522,27 +1491,21 @@ func livenesscompact(lv *Liveness) {
// Consider bit vectors in turn.
// If new, assign next number using uniq,
// record in remap, record in lv->livepointers and lv->argslivepointers
// record in remap, record in lv.livepointers and lv.argslivepointers
// under the new index, and add entry to hash table.
// If already seen, record earlier index in remap and free bitmaps.
var jarg Bvec
var j int
var h uint32
var arg Bvec
var jlocal Bvec
var local Bvec
for i := 0; i < n; i++ {
local = lv.livepointers[i]
arg = lv.argslivepointers[i]
h = hashbitmap(hashbitmap(H0, local), arg) % uint32(tablesize)
local := lv.livepointers[i]
arg := lv.argslivepointers[i]
h := hashbitmap(hashbitmap(H0, local), arg) % uint32(tablesize)
for {
j = table[h]
j := table[h]
if j < 0 {
break
}
jlocal = lv.livepointers[j]
jarg = lv.argslivepointers[j]
jlocal := lv.livepointers[j]
jarg := lv.argslivepointers[j]
if bvcmp(local, jlocal) == 0 && bvcmp(arg, jarg) == 0 {
remap[i] = j
goto Next
......@@ -1562,8 +1525,8 @@ func livenesscompact(lv *Liveness) {
Next:
}
// We've already reordered lv->livepointers[0:uniq]
// and lv->argslivepointers[0:uniq] and freed the bitmaps
// We've already reordered lv.livepointers[0:uniq]
// and lv.argslivepointers[0:uniq] and freed the bitmaps
// we don't need anymore. Clear the pointers later in the
// array so that we can tell where the coalesced bitmaps stop
// and so that we don't double-free when cleaning up.
......@@ -1573,10 +1536,9 @@ func livenesscompact(lv *Liveness) {
}
// Rewrite PCDATA instructions to use new numbering.
var i int
for p := lv.ptxt; p != nil; p = p.Link {
if p.As == obj.APCDATA && p.From.Offset == obj.PCDATA_StackMapIndex {
i = int(p.To.Offset)
i := p.To.Offset
if i >= 0 {
p.To.Offset = int64(remap[i])
}
......@@ -1584,20 +1546,20 @@ func livenesscompact(lv *Liveness) {
}
}
func printbitset(printed int, name string, vars []*Node, bits Bvec) int {
started := 0
func printbitset(printed bool, name string, vars []*Node, bits Bvec) bool {
started := false
for i, n := range vars {
if bvget(bits, int32(i)) == 0 {
continue
}
if started == 0 {
if printed == 0 {
if !started {
if !printed {
fmt.Printf("\t")
} else {
fmt.Printf(" ")
}
started = 1
printed = 1
started = true
printed = true
fmt.Printf("%s=", name)
} else {
fmt.Printf(",")
......@@ -1613,13 +1575,6 @@ func printbitset(printed int, name string, vars []*Node, bits Bvec) int {
// This format synthesizes the information used during the multiple passes
// into a single presentation.
func livenessprintdebug(lv *Liveness) {
var j int
var printed int
var p *obj.Prog
var args Bvec
var locals Bvec
var n *Node
fmt.Printf("liveness: %s\n", Curfn.Func.Nname.Sym.Name)
uevar := bvalloc(int32(len(lv.vars)))
......@@ -1635,7 +1590,7 @@ func livenessprintdebug(lv *Liveness) {
// bb#0 pred=1,2 succ=3,4
fmt.Printf("bb#%d pred=", i)
for j = 0; j < len(bb.pred); j++ {
for j := 0; j < len(bb.pred); j++ {
if j > 0 {
fmt.Printf(",")
}
......@@ -1643,7 +1598,7 @@ func livenessprintdebug(lv *Liveness) {
}
fmt.Printf(" succ=")
for j = 0; j < len(bb.succ); j++ {
for j := 0; j < len(bb.succ); j++ {
if j > 0 {
fmt.Printf(",")
}
......@@ -1653,41 +1608,41 @@ func livenessprintdebug(lv *Liveness) {
fmt.Printf("\n")
// initial settings
printed = 0
var printed bool
printed = printbitset(printed, "uevar", lv.vars, bb.uevar)
printed = printbitset(printed, "livein", lv.vars, bb.livein)
if printed != 0 {
if printed {
fmt.Printf("\n")
}
// program listing, with individual effects listed
for p = bb.first; ; p = p.Link {
for p := bb.first; ; p = p.Link {
fmt.Printf("%v\n", p)
if p.As == obj.APCDATA && p.From.Offset == obj.PCDATA_StackMapIndex {
pcdata = int(p.To.Offset)
}
progeffects(p, lv.vars, uevar, varkill, avarinit)
printed = 0
printed = false
printed = printbitset(printed, "uevar", lv.vars, uevar)
printed = printbitset(printed, "varkill", lv.vars, varkill)
printed = printbitset(printed, "avarinit", lv.vars, avarinit)
if printed != 0 {
if printed {
fmt.Printf("\n")
}
if issafepoint(p) {
args = lv.argslivepointers[pcdata]
locals = lv.livepointers[pcdata]
args := lv.argslivepointers[pcdata]
locals := lv.livepointers[pcdata]
fmt.Printf("\tlive=")
printed = 0
for j = 0; j < len(lv.vars); j++ {
n = lv.vars[j]
printed = false
for j := 0; j < len(lv.vars); j++ {
n := lv.vars[j]
if islive(n, args, locals) {
if printed != 0 {
if printed {
fmt.Printf(",")
}
fmt.Printf("%v", n)
printed++
printed = true
}
}
fmt.Printf("\n")
......@@ -1706,7 +1661,7 @@ func livenessprintdebug(lv *Liveness) {
printed = printbitset(printed, "avarinit", lv.vars, bb.avarinit)
printed = printbitset(printed, "avarinitany", lv.vars, bb.avarinitany)
printed = printbitset(printed, "avarinitall", lv.vars, bb.avarinitall)
if printed != 0 {
if printed {
fmt.Printf("\n")
}
}
......@@ -1714,30 +1669,23 @@ func livenessprintdebug(lv *Liveness) {
fmt.Printf("\n")
}
// Dumps an array of bitmaps to a symbol as a sequence of uint32 values. The
// Dumps a slice of bitmaps to a symbol as a sequence of uint32 values. The
// first word dumped is the total number of bitmaps. The second word is the
// length of the bitmaps. All bitmaps are assumed to be of equal length. The
// words that are followed are the raw bitmap words. The arr argument is an
// array of Node*s.
// words that are followed are the raw bitmap words.
func onebitwritesymbol(arr []Bvec, sym *Sym) {
off := 4 // number of bitmaps, to fill in later
off = duint32(sym, off, uint32(arr[0].n)) // number of bits in each bitmap
var i int
var j int
var word uint32
n := len(arr)
off := 0
off += 4 // number of bitmaps, to fill in later
bv := arr[0]
off = duint32(sym, off, uint32(bv.n)) // number of bits in each bitmap
for i = 0; i < n; i++ {
for i = 0; i < len(arr); i++ {
// bitmap words
bv = arr[i]
bv := arr[i]
if bv.b == nil {
break
}
for j = 0; int32(j) < bv.n; j += 32 {
word = bv.b[j/32]
for j := 0; int32(j) < bv.n; j += 32 {
word := bv.b[j/32]
// Runtime reads the bitmaps as byte arrays. Oblige.
off = duint8(sym, off, uint8(word))
......@@ -1818,7 +1766,6 @@ func liveness(fn *Node, firstp *obj.Prog, argssym *Sym, livesym *Sym) {
ln.SetOpt(nil)
}
}
freeliveness(lv)
freecfg(cfg)
......
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