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opt / golang / 1.19.4 / src / cmd / compile / internal / ssa /

📁 ..
📄 README.md(8.14 KB)
📄 TODO(950 B)
📄 addressingmodes.go(23.64 KB)
📄 bench_test.go(531 B)
📄 biasedsparsemap.go(2.71 KB)
📄 block.go(11.1 KB)
📄 branchelim.go(11.98 KB)
📄 branchelim_test.go(5.21 KB)
📄 cache.go(2.46 KB)
📄 check.go(16.59 KB)
📄 checkbce.go(956 B)
📄 compile.go(18.19 KB)
📄 config.go(11.7 KB)
📄 copyelim.go(1.83 KB)
📄 copyelim_test.go(1.29 KB)
📄 critical.go(3.19 KB)
📄 cse.go(9.43 KB)
📄 cse_test.go(4.25 KB)
📄 deadcode.go(9.61 KB)
📄 deadcode_test.go(3.49 KB)
📄 deadstore.go(9.08 KB)
📄 deadstore_test.go(4.09 KB)
📄 debug.go(56.34 KB)
📄 debug_lines_test.go(8.29 KB)
📄 debug_test.go(28.75 KB)
📄 decompose.go(13.41 KB)
📄 dom.go(7.98 KB)
📄 dom_test.go(13.34 KB)
📄 expand_calls.go(63.5 KB)
📄 export_test.go(3.23 KB)
📄 flagalloc.go(6.68 KB)
📄 flags_amd64_test.s(533 B)
📄 flags_arm64_test.s(699 B)
📄 flags_test.go(2.49 KB)
📄 func.go(27.08 KB)
📄 func_test.go(13.07 KB)
📄 fuse.go(6.5 KB)
📄 fuse_branchredirect.go(3.24 KB)
📄 fuse_comparisons.go(4.04 KB)
📄 fuse_test.go(7.21 KB)
📁 gen
📄 html.go(34.72 KB)
📄 id.go(576 B)
📄 layout.go(4.82 KB)
📄 lca.go(3.77 KB)
📄 lca_test.go(1.65 KB)
📄 likelyadjust.go(15.24 KB)
📄 location.go(3.06 KB)
📄 loopbce.go(10.54 KB)
📄 loopreschedchecks.go(15.86 KB)
📄 looprotate.go(2.61 KB)
📄 lower.go(1.36 KB)
📄 magic.go(15.77 KB)
📄 magic_test.go(9.1 KB)
📄 nilcheck.go(11.06 KB)
📄 nilcheck_test.go(12.17 KB)
📄 numberlines.go(7.83 KB)
📄 op.go(18.65 KB)
📄 opGen.go(1.01 MB)
📄 opt.go(308 B)
📄 passbm_test.go(3.14 KB)
📄 phielim.go(1.48 KB)
📄 phiopt.go(8.08 KB)
📄 poset.go(37.2 KB)
📄 poset_test.go(18.14 KB)
📄 print.go(3.85 KB)
📄 prove.go(41.82 KB)
📄 regalloc.go(83.69 KB)
📄 regalloc_test.go(6.49 KB)
📄 rewrite.go(53.49 KB)
📄 rewrite386.go(289.01 KB)
📄 rewrite386splitload.go(4.05 KB)
📄 rewriteAMD64.go(888.95 KB)
📄 rewriteAMD64splitload.go(21.41 KB)
📄 rewriteARM.go(487.7 KB)
📄 rewriteARM64.go(751.84 KB)
📄 rewriteCond_test.go(10.62 KB)
📄 rewriteLOONG64.go(193.44 KB)
📄 rewriteMIPS.go(174.44 KB)
📄 rewriteMIPS64.go(195.55 KB)
📄 rewritePPC64.go(431.6 KB)
📄 rewriteRISCV64.go(159.66 KB)
📄 rewriteS390X.go(433.4 KB)
📄 rewriteWasm.go(109.86 KB)
📄 rewrite_test.go(6.91 KB)
📄 rewritedec.go(10.16 KB)
📄 rewritedec64.go(63.77 KB)
📄 rewritegeneric.go(617.96 KB)
📄 schedule.go(18.23 KB)
📄 schedule_test.go(2.91 KB)
📄 shift_test.go(4.05 KB)
📄 shortcircuit.go(12.63 KB)
📄 shortcircuit_test.go(1.31 KB)
📄 sizeof_test.go(855 B)
📄 softfloat.go(1.99 KB)
📄 sparsemap.go(1.98 KB)
📄 sparseset.go(1.54 KB)
📄 sparsetree.go(8.05 KB)
📄 stackalloc.go(12.79 KB)
📄 stackframe.go(290 B)
📄 stmtlines_test.go(2.96 KB)
📁 testdata
📄 tighten.go(4.3 KB)
📄 trim.go(4.24 KB)
📄 tuple.go(1.97 KB)
📄 value.go(15.21 KB)
📄 writebarrier.go(19.29 KB)
📄 writebarrier_test.go(1.75 KB)
📄 xposmap.go(3.29 KB)
📄 zcse.go(2.07 KB)
📄 zeroextension_test.go(1.66 KB)

Editing: print.go

// Copyright 2015 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.

package ssa

import (
	"bytes"
	"fmt"
	"io"

"cmd/internal/notsha256"
	"cmd/internal/src"
)

func printFunc(f *Func) {
	f.Logf("%s", f)
}

func hashFunc(f *Func) []byte {
	h := notsha256.New()
	p := stringFuncPrinter{w: h, printDead: true}
	fprintFunc(p, f)
	return h.Sum(nil)
}

func (f *Func) String() string {
	var buf bytes.Buffer
	p := stringFuncPrinter{w: &buf, printDead: true}
	fprintFunc(p, f)
	return buf.String()
}

// rewriteHash returns a hash of f suitable for detecting rewrite cycles.
func (f *Func) rewriteHash() string {
	h := notsha256.New()
	p := stringFuncPrinter{w: h, printDead: false}
	fprintFunc(p, f)
	return fmt.Sprintf("%x", h.Sum(nil))
}

type funcPrinter interface {
	header(f *Func)
	startBlock(b *Block, reachable bool)
	endBlock(b *Block, reachable bool)
	value(v *Value, live bool)
	startDepCycle()
	endDepCycle()
	named(n LocalSlot, vals []*Value)
}

type stringFuncPrinter struct {
	w         io.Writer
	printDead bool
}

func (p stringFuncPrinter) header(f *Func) {
	fmt.Fprint(p.w, f.Name)
	fmt.Fprint(p.w, " ")
	fmt.Fprintln(p.w, f.Type)
}

func (p stringFuncPrinter) startBlock(b *Block, reachable bool) {
	if !p.printDead && !reachable {
		return
	}
	fmt.Fprintf(p.w, "  b%d:", b.ID)
	if len(b.Preds) > 0 {
		io.WriteString(p.w, " <-")
		for _, e := range b.Preds {
			pred := e.b
			fmt.Fprintf(p.w, " b%d", pred.ID)
		}
	}
	if !reachable {
		fmt.Fprint(p.w, " DEAD")
	}
	io.WriteString(p.w, "\n")
}

func (p stringFuncPrinter) endBlock(b *Block, reachable bool) {
	if !p.printDead && !reachable {
		return
	}
	fmt.Fprintln(p.w, "    "+b.LongString())
}

func StmtString(p src.XPos) string {
	linenumber := "(?) "
	if p.IsKnown() {
		pfx := ""
		if p.IsStmt() == src.PosIsStmt {
			pfx = "+"
		}
		if p.IsStmt() == src.PosNotStmt {
			pfx = "-"
		}
		linenumber = fmt.Sprintf("(%s%d) ", pfx, p.Line())
	}
	return linenumber
}

func (p stringFuncPrinter) value(v *Value, live bool) {
	if !p.printDead && !live {
		return
	}
	fmt.Fprintf(p.w, "    %s", StmtString(v.Pos))
	fmt.Fprint(p.w, v.LongString())
	if !live {
		fmt.Fprint(p.w, " DEAD")
	}
	fmt.Fprintln(p.w)
}

func (p stringFuncPrinter) startDepCycle() {
	fmt.Fprintln(p.w, "dependency cycle!")
}

func (p stringFuncPrinter) endDepCycle() {}

func (p stringFuncPrinter) named(n LocalSlot, vals []*Value) {
	fmt.Fprintf(p.w, "name %s: %v\n", n, vals)
}

func fprintFunc(p funcPrinter, f *Func) {
	reachable, live := findlive(f)
	defer f.retDeadcodeLive(live)
	p.header(f)
	printed := make([]bool, f.NumValues())
	for _, b := range f.Blocks {
		p.startBlock(b, reachable[b.ID])

if f.scheduled {
			// Order of Values has been decided - print in that order.
			for _, v := range b.Values {
				p.value(v, live[v.ID])
				printed[v.ID] = true
			}
			p.endBlock(b, reachable[b.ID])
			continue
		}

// print phis first since all value cycles contain a phi
		n := 0
		for _, v := range b.Values {
			if v.Op != OpPhi {
				continue
			}
			p.value(v, live[v.ID])
			printed[v.ID] = true
			n++
		}

// print rest of values in dependency order
		for n < len(b.Values) {
			m := n
		outer:
			for _, v := range b.Values {
				if printed[v.ID] {
					continue
				}
				for _, w := range v.Args {
					// w == nil shouldn't happen, but if it does,
					// don't panic; we'll get a better diagnosis later.
					if w != nil && w.Block == b && !printed[w.ID] {
						continue outer
					}
				}
				p.value(v, live[v.ID])
				printed[v.ID] = true
				n++
			}
			if m == n {
				p.startDepCycle()
				for _, v := range b.Values {
					if printed[v.ID] {
						continue
					}
					p.value(v, live[v.ID])
					printed[v.ID] = true
					n++
				}
				p.endDepCycle()
			}
		}

p.endBlock(b, reachable[b.ID])
	}
	for _, name := range f.Names {
		p.named(*name, f.NamedValues[*name])
	}
}

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Editing: print.go

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