Unlimited repetitions are not subject to this restriction.

Grouping:

	(re)           numbered capturing group (submatch)
	(?P<name>re)   named & numbered capturing group (submatch)
	(?<name>re)    named & numbered capturing group (submatch)
	(?:re)         non-capturing group
	(?flags)       set flags within current group; non-capturing
	(?flags:re)    set flags during re; non-capturing

	"path/filepath"
	"reflect"
	"regexp"
	"runtime"
	"sort"
	"strconv"
	"strings"
	"testing"
)

// Matches lines in genssa output that are marked "isstmt", and the parenthesized plus-prefixed line number is a submatch
var asmLine *regexp.Regexp = regexp.MustCompile(`^\s[vb]\d+\s+\d+\s\(\+(\d+)\)`)

// this matches e.g.                            `   v123456789   000007   (+9876654310) MOVUPS	X15, ""..autotmp_2-32(SP)`

// 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.

// backtrack is a regular expression search with submatch
// tracking for small regular expressions and texts. It allocates
// a bit vector with (length of input) * (length of prog) bits,
// to make sure it never explores the same (character position, instruction)