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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: biasedsparsemap.go

// Copyright 2018 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"
	"math"
)

// A biasedSparseMap is a sparseMap for integers between J and K inclusive,
// where J might be somewhat larger than zero (and K-J is probably much smaller than J).
// (The motivating use case is the line numbers of statements for a single function.)
// Not all features of a SparseMap are exported, and it is also easy to treat a
// biasedSparseMap like a SparseSet.
type biasedSparseMap struct {
	s     *sparseMap
	first int
}

// newBiasedSparseMap returns a new biasedSparseMap for values between first and last, inclusive.
func newBiasedSparseMap(first, last int) *biasedSparseMap {
	if first > last {
		return &biasedSparseMap{first: math.MaxInt32, s: nil}
	}
	return &biasedSparseMap{first: first, s: newSparseMap(1 + last - first)}
}

// cap returns one more than the largest key valid for s
func (s *biasedSparseMap) cap() int {
	if s == nil || s.s == nil {
		return 0
	}
	return s.s.cap() + int(s.first)
}

// size returns the number of entries stored in s
func (s *biasedSparseMap) size() int {
	if s == nil || s.s == nil {
		return 0
	}
	return s.s.size()
}

// contains reports whether x is a key in s
func (s *biasedSparseMap) contains(x uint) bool {
	if s == nil || s.s == nil {
		return false
	}
	if int(x) < s.first {
		return false
	}
	if int(x) >= s.cap() {
		return false
	}
	return s.s.contains(ID(int(x) - s.first))
}

// get returns the value s maps for key x, or -1 if
// x is not mapped or is out of range for s.
func (s *biasedSparseMap) get(x uint) int32 {
	if s == nil || s.s == nil {
		return -1
	}
	if int(x) < s.first {
		return -1
	}
	if int(x) >= s.cap() {
		return -1
	}
	return s.s.get(ID(int(x) - s.first))
}

// getEntry returns the i'th key and value stored in s,
// where 0 <= i < s.size()
func (s *biasedSparseMap) getEntry(i int) (x uint, v int32) {
	e := s.s.contents()[i]
	x = uint(int(e.key) + s.first)
	v = e.val
	return
}

// add inserts x->0 into s, provided that x is in the range of keys stored in s.
func (s *biasedSparseMap) add(x uint) {
	if int(x) < s.first || int(x) >= s.cap() {
		return
	}
	s.s.set(ID(int(x)-s.first), 0, src.NoXPos)
}

// add inserts x->v into s, provided that x is in the range of keys stored in s.
func (s *biasedSparseMap) set(x uint, v int32) {
	if int(x) < s.first || int(x) >= s.cap() {
		return
	}
	s.s.set(ID(int(x)-s.first), v, src.NoXPos)
}

// remove removes key x from s.
func (s *biasedSparseMap) remove(x uint) {
	if int(x) < s.first || int(x) >= s.cap() {
		return
	}
	s.s.remove(ID(int(x) - s.first))
}

func (s *biasedSparseMap) clear() {
	if s.s != nil {
		s.s.clear()
	}
}

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Editing: biasedsparsemap.go

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