}

  /**
   * Returns a linear transformation giving the best fit to the data according to <a
   * href="http://mathworld.wolfram.com/LeastSquaresFitting.html">Ordinary Least Squares linear
   * regression</a> of {@code y} as a function of {@code x}. The count must be greater than one, and
   * either the {@code x} or {@code y} data must have a non-zero population variance (i.e. {@code

// Copyright 2011 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.

// Plan 9 system calls.
// This file is compiled as ordinary Go code,
// but it is also input to mksyscall,
// which parses the //sys lines and generates system call stubs.
// Note that sometimes we use a lowercase //sys name and
// wrap it in our own nicer implementation.

package syscall

			// always stat through it (using Stat, not Lstat). That way we don't need
			// to worry about the interaction between Lstat and directories: if a
			// symlink in the overlay points to a directory, we reject it like an
			// ordinary directory.
			fi, err := os.Stat(to.actualFilePath)
			if err != nil {
				files[name] = missingFile(name)
				continue
			} else if fi.IsDir() {

				// off the faulting load/store in favor of the one from the nil check.

				// Iteration order means that first nilcheck in the chain wins, others
				// are bumped into the ordinary statement preservation algorithm.
				u := b.Values[unnecessary.get(v.Args[0].ID)]
				if !u.Pos.SameFileAndLine(v.Pos) {
					if u.Pos.IsStmt() == src.PosIsStmt {
						pendingLines.add(u.Pos)
					}

				// bitwise-identical to float32(math.Nan()) — using the default
				// formatting, which is equivalent to strconv.FormatFloat with format
				// 'g' and can be parsed by strconv.ParseFloat.
				//
				// For an ordinary floating-point number this format includes
				// sufficiently many digits to reconstruct the exact value. For positive
				// or negative infinity it is the string "+Inf" or "-Inf". For positive

			// function instantiation
			return true
		}
	}

	// x should not be generic at this point, but be safe and check
	check.nonGeneric(nil, x)
	if x.mode == invalid {
		return false
	}

	// ordinary index expression
	valid := false
	length := int64(-1) // valid if >= 0
	switch typ := under(x.typ).(type) {
	case *Basic:
		if isString(typ) {
			valid = true
			if x.mode == constant_ {

  }

  /**
   * Returns a linear transformation giving the best fit to the data according to <a
   * href="http://mathworld.wolfram.com/LeastSquaresFitting.html">Ordinary Least Squares linear
   * regression</a> of {@code y} as a function of {@code x}. The count must be greater than one, and
   * either the {@code x} or {@code y} data must have a non-zero population variance (i.e. {@code

			// function instantiation
			return true
		}
	}

	// x should not be generic at this point, but be safe and check
	check.nonGeneric(nil, x)
	if x.mode == invalid {
		return false
	}

	// ordinary index expression
	valid := false
	length := int64(-1) // valid if >= 0
	switch typ := under(x.typ).(type) {
	case *Basic:
		if isString(typ) {
			valid = true
			if x.mode == constant_ {

// the operating system and the runtime can process these faults
// correctly. That is, we're indirectly testing that without SetPanicOnFault
// these would manage to turn into ordinary crashes.
// Note that these are truncated on 32-bit systems, so the bottom 32 bits
// of the larger addresses must themselves be invalid addresses.
// We might get unlucky and the OS might have mapped one of these

// Copyright 2009,2010 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.

// Darwin system calls.
// This file is compiled as ordinary Go code,
// but it is also input to mksyscall,
// which parses the //sys lines and generates system call stubs.
// Note that sometimes we use a lowercase //sys name and wrap
// it in our own nicer implementation, either here or in