return nil
		}

		// For constants larger than 32 bits in size that have trailing zeros,
		// use the value with the trailing zeros removed and then use a SLLI
		// instruction to restore the original constant.
		// For example:
		// 	MOV $0x8000000000000000, X10
		// becomes
		// 	MOV $1, X10
		// 	SLLI $63, X10, X10
		var insSLLI *instruction
		if err := immIFits(ins.imm, 32); err != nil {

type state struct {
	str       string        // remainder of string to demangle
	verbose   bool          // whether to use verbose demangling
	off       int           // offset of str within original string
	subs      substitutions // substitutions
	templates []*Template   // templates being processed

	// The number of entries in templates when we started parsing

// Copyright 2014 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.

// Memory allocator.
//
// This was originally based on tcmalloc, but has diverged quite a bit.
// http://goog-perftools.sourceforge.net/doc/tcmalloc.html

// The main allocator works in runs of pages.
// Small allocation sizes (up to and including 32 kB) are