Update bleve dependency to latest master revision (#6100)

* update bleve to master b17287a86f6cac923a5d886e10618df994eeb54b6724eac2e3b8dde89cfbe3a2

* remove unused pkg from dep file

* change bleve from master to recent revision

vendor/github.com/couchbase/vellum/regexp/compile.go

@@ -18,17 +18,27 @@ import (
 	"regexp/syntax"
 	"unicode"
 
+	unicode_utf8 "unicode/utf8"
+
 	"github.com/couchbase/vellum/utf8"
 )
 
 type compiler struct {
 	sizeLimit uint
 	insts     prog
+	instsPool []inst
+
+	sequences  utf8.Sequences
+	rangeStack utf8.RangeStack
+	startBytes []byte
+	endBytes   []byte
 }
 
 func newCompiler(sizeLimit uint) *compiler {
 	return &compiler{
-		sizeLimit: sizeLimit,
+		sizeLimit:  sizeLimit,
+		startBytes: make([]byte, unicode_utf8.UTFMax),
+		endBytes:   make([]byte, unicode_utf8.UTFMax),
 	}
 }
 
@@ -37,13 +47,13 @@ func (c *compiler) compile(ast *syntax.Regexp) (prog, error) {
 	if err != nil {
 		return nil, err
 	}
-	c.insts = append(c.insts, &inst{
-		op: OpMatch,
-	})
+	inst := c.allocInst()
+	inst.op = OpMatch
+	c.insts = append(c.insts, inst)
 	return c.insts, nil
 }
 
-func (c *compiler) c(ast *syntax.Regexp) error {
+func (c *compiler) c(ast *syntax.Regexp) (err error) {
 	if ast.Flags&syntax.NonGreedy > 1 {
 		return ErrNoLazy
 	}
@@ -67,11 +77,12 @@ func (c *compiler) c(ast *syntax.Regexp) error {
 				next.Rune = next.Rune0[0:2]
 				return c.c(&next)
 			}
-			seqs, err := utf8.NewSequences(r, r)
+			c.sequences, c.rangeStack, err = utf8.NewSequencesPrealloc(
+				r, r, c.sequences, c.rangeStack, c.startBytes, c.endBytes)
 			if err != nil {
 				return err
 			}
-			for _, seq := range seqs {
+			for _, seq := range c.sequences {
 				c.compileUtf8Ranges(seq)
 			}
 		}
@@ -106,8 +117,7 @@ func (c *compiler) c(ast *syntax.Regexp) error {
 		if len(ast.Sub) == 0 {
 			return nil
 		}
-		jmpsToEnd := []uint{}
-
+		jmpsToEnd := make([]uint, 0, len(ast.Sub)-1)
 		// does not handle last entry
 		for i := 0; i < len(ast.Sub)-1; i++ {
 			sub := ast.Sub[i]
@@ -188,7 +198,8 @@ func (c *compiler) c(ast *syntax.Regexp) error {
 				return err
 			}
 		}
-		var splits, starts []uint
+		splits := make([]uint, 0, ast.Max-ast.Min)
+		starts := make([]uint, 0, ast.Max-ast.Min)
 		for i := ast.Min; i < ast.Max; i++ {
 			splits = append(splits, c.emptySplit())
 			starts = append(starts, uint(len(c.insts)))
@@ -218,8 +229,7 @@ func (c *compiler) compileClass(ast *syntax.Regexp) error {
 	if len(ast.Rune) == 0 {
 		return nil
 	}
-	var jmps []uint
-
+	jmps := make([]uint, 0, len(ast.Rune)-2)
 	// does not do last pair
 	for i := 0; i < len(ast.Rune)-2; i += 2 {
 		rstart := ast.Rune[i]
@@ -249,16 +259,16 @@ func (c *compiler) compileClass(ast *syntax.Regexp) error {
 	return nil
 }
 
-func (c *compiler) compileClassRange(startR, endR rune) error {
-	seqs, err := utf8.NewSequences(startR, endR)
+func (c *compiler) compileClassRange(startR, endR rune) (err error) {
+	c.sequences, c.rangeStack, err = utf8.NewSequencesPrealloc(
+		startR, endR, c.sequences, c.rangeStack, c.startBytes, c.endBytes)
 	if err != nil {
 		return err
 	}
-	var jmps []uint
-
+	jmps := make([]uint, 0, len(c.sequences)-1)
 	// does not do last entry
-	for i := 0; i < len(seqs)-1; i++ {
-		seq := seqs[i]
+	for i := 0; i < len(c.sequences)-1; i++ {
+		seq := c.sequences[i]
 		split := c.emptySplit()
 		j1 := c.top()
 		c.compileUtf8Ranges(seq)
@@ -267,7 +277,7 @@ func (c *compiler) compileClassRange(startR, endR rune) error {
 		c.setSplit(split, j1, j2)
 	}
 	// handle last entry
-	c.compileUtf8Ranges(seqs[len(seqs)-1])
+	c.compileUtf8Ranges(c.sequences[len(c.sequences)-1])
 	end := c.top()
 	for _, jmp := range jmps {
 		c.setJump(jmp, end)
@@ -278,25 +288,25 @@ func (c *compiler) compileClassRange(startR, endR rune) error {
 
 func (c *compiler) compileUtf8Ranges(seq utf8.Sequence) {
 	for _, r := range seq {
-		c.insts = append(c.insts, &inst{
-			op:         OpRange,
-			rangeStart: r.Start,
-			rangeEnd:   r.End,
-		})
+		inst := c.allocInst()
+		inst.op = OpRange
+		inst.rangeStart = r.Start
+		inst.rangeEnd = r.End
+		c.insts = append(c.insts, inst)
 	}
 }
 
 func (c *compiler) emptySplit() uint {
-	c.insts = append(c.insts, &inst{
-		op: OpSplit,
-	})
+	inst := c.allocInst()
+	inst.op = OpSplit
+	c.insts = append(c.insts, inst)
 	return c.top() - 1
 }
 
 func (c *compiler) emptyJump() uint {
-	c.insts = append(c.insts, &inst{
-		op: OpJmp,
-	})
+	inst := c.allocInst()
+	inst.op = OpJmp
+	c.insts = append(c.insts, inst)
 	return c.top() - 1
 }
 
@@ -314,3 +324,12 @@ func (c *compiler) setJump(i, pc uint) {
 func (c *compiler) top() uint {
 	return uint(len(c.insts))
 }
+
+func (c *compiler) allocInst() *inst {
+	if len(c.instsPool) <= 0 {
+		c.instsPool = make([]inst, 16)
+	}
+	inst := &c.instsPool[0]
+	c.instsPool = c.instsPool[1:]
+	return inst
+}