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📁 ..
📄 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: xposmap.go

// Copyright 2019 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 (
	"cmd/internal/src"
	"fmt"
)

type lineRange struct {
	first, last uint32
}

// An xposmap is a map from fileindex and line of src.XPos to int32,
// implemented sparsely to save space (column and statement status are ignored).
// The sparse skeleton is constructed once, and then reused by ssa phases
// that (re)move values with statements attached.
type xposmap struct {
	// A map from file index to maps from line range to integers (block numbers)
	maps map[int32]*biasedSparseMap
	// The next two fields provide a single-item cache for common case of repeated lines from same file.
	lastIndex int32            // -1 means no entry in cache
	lastMap   *biasedSparseMap // map found at maps[lastIndex]
}

// newXposmap constructs an xposmap valid for inputs which have a file index in the keys of x,
// and line numbers in the range x[file index].
// The resulting xposmap will panic if a caller attempts to set or add an XPos not in that range.
func newXposmap(x map[int]lineRange) *xposmap {
	maps := make(map[int32]*biasedSparseMap)
	for i, p := range x {
		maps[int32(i)] = newBiasedSparseMap(int(p.first), int(p.last))
	}
	return &xposmap{maps: maps, lastIndex: -1} // zero for the rest is okay
}

// clear removes data from the map but leaves the sparse skeleton.
func (m *xposmap) clear() {
	for _, l := range m.maps {
		if l != nil {
			l.clear()
		}
	}
	m.lastIndex = -1
	m.lastMap = nil
}

// mapFor returns the line range map for a given file index.
func (m *xposmap) mapFor(index int32) *biasedSparseMap {
	if index == m.lastIndex {
		return m.lastMap
	}
	mf := m.maps[index]
	m.lastIndex = index
	m.lastMap = mf
	return mf
}

// set inserts p->v into the map.
// If p does not fall within the set of fileindex->lineRange used to construct m, this will panic.
func (m *xposmap) set(p src.XPos, v int32) {
	s := m.mapFor(p.FileIndex())
	if s == nil {
		panic(fmt.Sprintf("xposmap.set(%d), file index not found in map\n", p.FileIndex()))
	}
	s.set(p.Line(), v)
}

// get returns the int32 associated with the file index and line of p.
func (m *xposmap) get(p src.XPos) int32 {
	s := m.mapFor(p.FileIndex())
	if s == nil {
		return -1
	}
	return s.get(p.Line())
}

// add adds p to m, treating m as a set instead of as a map.
// If p does not fall within the set of fileindex->lineRange used to construct m, this will panic.
// Use clear() in between set/map interpretations of m.
func (m *xposmap) add(p src.XPos) {
	m.set(p, 0)
}

// contains returns whether the file index and line of p are in m,
// treating m as a set instead of as a map.
func (m *xposmap) contains(p src.XPos) bool {
	s := m.mapFor(p.FileIndex())
	if s == nil {
		return false
	}
	return s.contains(p.Line())
}

// remove removes the file index and line for p from m,
// whether m is currently treated as a map or set.
func (m *xposmap) remove(p src.XPos) {
	s := m.mapFor(p.FileIndex())
	if s == nil {
		return
	}
	s.remove(p.Line())
}

// foreachEntry applies f to each (fileindex, line, value) triple in m.
func (m *xposmap) foreachEntry(f func(j int32, l uint, v int32)) {
	for j, mm := range m.maps {
		s := mm.size()
		for i := 0; i < s; i++ {
			l, v := mm.getEntry(i)
			f(j, l, v)
		}
	}
}

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Editing: xposmap.go

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