Sync config, include and libiberty with GCC

config/

2020-06-24  H.J. Lu  <hongjiu.lu@intel.com>

	Sync with GCC
	2020-05-29  H.J. Lu  <hjl.tools@gmail.com>

	PR bootstrap/95413
	* cet.m4: Replace save_CFLAGS and save_LDFLAGS with
	cet_save_CFLAGS and cet_save_LDFLAGS.

include/

2020-06-24  H.J. Lu  <hongjiu.lu@intel.com>

	Sync with GCC
	2020-06-23  Nick Alcock  <nick.alcock@oracle.com>

	* libiberty.h (bsearch_r): New.

	2020-04-17  Martin Liska  <mliska@suse.cz>
		    Jonathan Yong <10walls@gmail.com>

	PR gcov-profile/94570
	* filenames.h (defined): Do not define HAVE_DOS_BASED_FILE_SYSTEM
	for CYGWIN.

libiberty/

2020-06-23  Nick Alcock  <nick.alcock@oracle.com>

	* bsearch_r.c: New file.
	* Makefile.in (CFILES): Add bsearch_r.c.
	(REQUIRED_OFILES): Add bsearch_r.o.
	* functions.texi: Regenerate.

2020-05-29  H.J. Lu  <hjl.tools@gmail.com>

	PR bootstrap/95413
	* configure: Regenerated.

2020-05-15  Iain Buclaw  <ibuclaw@gdcproject.org>

	* d-demangle.c (dlang_attributes): Add @live attribute.
	* testsuite/d-demangle-expected: Add new tests.

2020-05-14  Rainer Schuetze  <r.sagitario@gmx.de>
	    Iain Buclaw  <ibuclaw@gdcproject.org>

	* d-demangle.c (enum dlang_symbol_kinds): Remove enum.
	(struct dlang_info): New struct
	(dlang_decode_backref): New function.
	(dlang_backref): New function.
	(dlang_symbol_backref): New function.
	(dlang_type_backref): New function.
	(dlang_symbol_name_p): New function.
	(dlang_function_type_noreturn): New function.
	(dlang_function_type): Add 'info' parameter.  Decode function type
	with dlang_function_type_noreturn.
	(dlang_function_args): Add 'info' parameter.
	(dlang_type): Add 'info' parameter.  Handle back referenced types.
	(dlang_identifier): Replace 'kind' parameter with 'info'.  Handle back
	referenced symbols.  Split off decoding of plain identifiers to...
	(dlang_lname): ...here.
	(dlang_parse_mangle): Replace 'kind' parameter with 'info'.  Decode
	function type and return with dlang_type.
	(dlang_parse_qualified): Replace 'kind' parameter with 'info', add
	'suffix_modifier' parameter.  Decode function type with
	dlang_function_type_noreturn.
	(dlang_parse_tuple): Add 'info' parameter.
	(dlang_template_symbol_param): New function.
	(dlang_template_args): Add 'info' parameter.  Decode symbol parameter
	with dlang_template_symbol_param.  Handle back referenced values, and
	externally mangled parameters.
	(dlang_parse_template): Add 'info' parameter.
	(dlang_demangle_init_info): New function.
	(dlang_demangle): Initialize and pass 'info' parameter.
	* testsuite/d-demangle-expected: Add new tests.

12 files changed, 812 insertions, 279 deletions

diff --git a/config/ChangeLog b/config/ChangeLog
index 0e988b1..7dc11d6 100644
--- a/config/ChangeLog
+++ b/config/ChangeLog
@@ -1,3 +1,12 @@
+2020-06-24  H.J. Lu  <hongjiu.lu@intel.com>
+
+	Sync with GCC
+	2020-05-29  H.J. Lu  <hjl.tools@gmail.com>
+
+	PR bootstrap/95413
+	* cet.m4: Replace save_CFLAGS and save_LDFLAGS with
+	cet_save_CFLAGS and cet_save_LDFLAGS.
+
 2020-05-16  H.J. Lu  <hongjiu.lu@intel.com>
 
 	Sync with GCC
diff --git a/config/cet.m4 b/config/cet.m4
index 2bb2c8a..911fbd4 100644
--- a/config/cet.m4
+++ b/config/cet.m4
@@ -7,13 +7,14 @@ GCC_ENABLE(cet, auto, ,[enable Intel CET in target libraries],
 	   permit yes|no|auto)
 AC_MSG_CHECKING([for CET support])
 
+# NB: Avoid nested save_CFLAGS and save_LDFLAGS.
 case "$host" in
   i[[34567]]86-*-linux* | x86_64-*-linux*)
     case "$enable_cet" in
       auto)
 	# Check if target supports multi-byte NOPs
 	# and if assembler supports CET insn.
-	save_CFLAGS="$CFLAGS"
+	cet_save_CFLAGS="$CFLAGS"
 	CFLAGS="$CFLAGS -fcf-protection"
 	AC_COMPILE_IFELSE(
 	 [AC_LANG_PROGRAM(
@@ -27,7 +28,7 @@ asm ("setssbsy");
 	  ])],
 	 [enable_cet=yes],
 	 [enable_cet=no])
-	CFLAGS="$save_CFLAGS"
+	CFLAGS="$cet_save_CFLAGS"
 	;;
       yes)
 	# Check if assembler supports CET.
@@ -64,7 +65,7 @@ AC_MSG_CHECKING([for CET support])
 case "$host" in
   i[[34567]]86-*-linux* | x86_64-*-linux*)
     may_have_cet=yes
-    save_CFLAGS="$CFLAGS"
+    cet_save_CFLAGS="$CFLAGS"
     CFLAGS="$CFLAGS -fcf-protection"
     case "$enable_cet" in
       auto)
@@ -93,7 +94,7 @@ asm ("setssbsy");
 	 [AC_MSG_ERROR([assembler with CET support is required for --enable-cet])])
 	;;
     esac
-    CFLAGS="$save_CFLAGS"
+    CFLAGS="$cet_save_CFLAGS"
     ;;
   *)
     may_have_cet=no
@@ -101,9 +102,9 @@ asm ("setssbsy");
     ;;
 esac
 
-save_CFLAGS="$CFLAGS"
+cet_save_CFLAGS="$CFLAGS"
 CFLAGS="$CFLAGS -fcf-protection=none"
-save_LDFLAGS="$LDFLAGS"
+cet_save_LDFLAGS="$LDFLAGS"
 LDFLAGS="$LDFLAGS -Wl,-z,ibt,-z,shstk"
 if test x$may_have_cet = xyes; then
   # Check whether -fcf-protection=none -Wl,-z,ibt,-z,shstk work.
@@ -159,6 +160,6 @@ if test x$enable_cet = xyes; then
 else
   AC_MSG_RESULT([no])
 fi
-CFLAGS="$save_CFLAGS"
-LDFLAGS="$save_LDFLAGS"
+CFLAGS="$cet_save_CFLAGS"
+LDFLAGS="$cet_save_LDFLAGS"
 ])
diff --git a/include/ChangeLog b/include/ChangeLog
index d36213f..2251679 100644
--- a/include/ChangeLog
+++ b/include/ChangeLog
@@ -1,3 +1,17 @@
+2020-06-24  H.J. Lu  <hongjiu.lu@intel.com>
+
+	Sync with GCC
+	2020-06-23  Nick Alcock  <nick.alcock@oracle.com>
+
+	* libiberty.h (bsearch_r): New.
+
+	2020-04-17  Martin Liska  <mliska@suse.cz>
+		    Jonathan Yong <10walls@gmail.com>
+
+	PR gcov-profile/94570
+	* filenames.h (defined): Do not define HAVE_DOS_BASED_FILE_SYSTEM
+	for CYGWIN.
+
 2020-06-22  Alex Coplan  <alex.coplan@arm.com>
 
 	* opcode/aarch64.h (AARCH64_FEATURE_SHA2): Normalize.
diff --git a/include/filenames.h b/include/filenames.h
index 1ed4412..fcde227 100644
--- a/include/filenames.h
+++ b/include/filenames.h
@@ -32,7 +32,8 @@ Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA.
 extern "C" {
 #endif
 
-#if defined(__MSDOS__) || defined(_WIN32) || defined(__OS2__) || defined (__CYGWIN__)
+#if defined(__MSDOS__) || (defined(_WIN32) && ! defined(__CYGWIN__)) || \
+    defined(__OS2__)
 #  ifndef HAVE_DOS_BASED_FILE_SYSTEM
 #    define HAVE_DOS_BASED_FILE_SYSTEM 1
 #  endif
diff --git a/include/libiberty.h b/include/libiberty.h
index 141cb88..0bb5b81 100644
--- a/include/libiberty.h
+++ b/include/libiberty.h
@@ -641,6 +641,13 @@ extern int pexecute (const char *, char * const *, const char *,
 
 extern int pwait (int, int *, int);
 
+/* Like bsearch, but takes and passes on an argument like qsort_r.  */
+
+extern void *bsearch_r (register const void *, const void *,
+			size_t, register size_t,
+			register int (*)(const void *, const void *, void *),
+			void *);
+
 #if defined(HAVE_DECL_ASPRINTF) && !HAVE_DECL_ASPRINTF
 /* Like sprintf but provides a pointer to malloc'd storage, which must
    be freed by the caller.  */
diff --git a/libiberty/ChangeLog b/libiberty/ChangeLog
index f569118..19d2b70 100644
--- a/libiberty/ChangeLog
+++ b/libiberty/ChangeLog
@@ -1,3 +1,53 @@
+2020-06-23  Nick Alcock  <nick.alcock@oracle.com>
+
+	* bsearch_r.c: New file.
+	* Makefile.in (CFILES): Add bsearch_r.c.
+	(REQUIRED_OFILES): Add bsearch_r.o.
+	* functions.texi: Regenerate.
+
+2020-05-29  H.J. Lu  <hjl.tools@gmail.com>
+
+	PR bootstrap/95413
+	* configure: Regenerated.
+
+2020-05-15  Iain Buclaw  <ibuclaw@gdcproject.org>
+
+	* d-demangle.c (dlang_attributes): Add @live attribute.
+	* testsuite/d-demangle-expected: Add new tests.
+
+2020-05-14  Rainer Schuetze  <r.sagitario@gmx.de>
+	    Iain Buclaw  <ibuclaw@gdcproject.org>
+
+	* d-demangle.c (enum dlang_symbol_kinds): Remove enum.
+	(struct dlang_info): New struct
+	(dlang_decode_backref): New function.
+	(dlang_backref): New function.
+	(dlang_symbol_backref): New function.
+	(dlang_type_backref): New function.
+	(dlang_symbol_name_p): New function.
+	(dlang_function_type_noreturn): New function.
+	(dlang_function_type): Add 'info' parameter.  Decode function type
+	with dlang_function_type_noreturn.
+	(dlang_function_args): Add 'info' parameter.
+	(dlang_type): Add 'info' parameter.  Handle back referenced types.
+	(dlang_identifier): Replace 'kind' parameter with 'info'.  Handle back
+	referenced symbols.  Split off decoding of plain identifiers to...
+	(dlang_lname): ...here.
+	(dlang_parse_mangle): Replace 'kind' parameter with 'info'.  Decode
+	function type and return with dlang_type.
+	(dlang_parse_qualified): Replace 'kind' parameter with 'info', add
+	'suffix_modifier' parameter.  Decode function type with
+	dlang_function_type_noreturn.
+	(dlang_parse_tuple): Add 'info' parameter.
+	(dlang_template_symbol_param): New function.
+	(dlang_template_args): Add 'info' parameter.  Decode symbol parameter
+	with dlang_template_symbol_param.  Handle back referenced values, and
+	externally mangled parameters.
+	(dlang_parse_template): Add 'info' parameter.
+	(dlang_demangle_init_info): New function.
+	(dlang_demangle): Initialize and pass 'info' parameter.
+	* testsuite/d-demangle-expected: Add new tests.
+
 2020-05-12  H.J. Lu  <hongjiu.lu@intel.com>
 
 	PR bootstrap/94998
diff --git a/libiberty/Makefile.in b/libiberty/Makefile.in
index d6b302e..895f701 100644
--- a/libiberty/Makefile.in
+++ b/libiberty/Makefile.in
@@ -124,7 +124,7 @@ COMPILE.c = $(CC) -c @DEFS@ $(CFLAGS) $(CPPFLAGS) -I. -I$(INCDIR) \
 # CONFIGURED_OFILES and funcs in configure.ac.  Also run "make maint-deps"
 # to build the new rules.
 CFILES = alloca.c argv.c asprintf.c atexit.c				\
-	basename.c bcmp.c bcopy.c bsearch.c bzero.c			\
+	basename.c bcmp.c bcopy.c bsearch.c bsearch_r.c bzero.c		\
 	calloc.c choose-temp.c clock.c concat.c cp-demangle.c		\
 	 cp-demint.c cplus-dem.c crc32.c				\
 	d-demangle.c dwarfnames.c dyn-string.c				\
@@ -168,6 +168,7 @@ REQUIRED_OFILES =							\
 	./regex.$(objext) ./cplus-dem.$(objext) ./cp-demangle.$(objext) \
 	./md5.$(objext) ./sha1.$(objext) ./alloca.$(objext)		\
 	./argv.$(objext)						\
+	./bsearch_r.$(objext)						\
 	./choose-temp.$(objext) ./concat.$(objext)			\
 	./cp-demint.$(objext) ./crc32.$(objext) ./d-demangle.$(objext)	\
 	./dwarfnames.$(objext) ./dyn-string.$(objext)			\
@@ -601,6 +602,15 @@ $(CONFIGURED_OFILES): stamp-picdir stamp-noasandir
 	else true; fi
 	$(COMPILE.c) $(srcdir)/bsearch.c $(OUTPUT_OPTION)
 
+./bsearch_r.$(objext): $(srcdir)/bsearch_r.c config.h $(INCDIR)/ansidecl.h
+	if [ x"$(PICFLAG)" != x ]; then \
+	  $(COMPILE.c) $(PICFLAG) $(srcdir)/bsearch_r.c -o pic/$@; \
+	else true; fi
+	if [ x"$(NOASANFLAG)" != x ]; then \
+	  $(COMPILE.c) $(PICFLAG) $(NOASANFLAG) $(srcdir)/bsearch_r.c -o noasan/$@; \
+	else true; fi
+	$(COMPILE.c) $(srcdir)/bsearch_r.c $(OUTPUT_OPTION)
+
 ./bzero.$(objext): $(srcdir)/bzero.c
 	if [ x"$(PICFLAG)" != x ]; then \
 	  $(COMPILE.c) $(PICFLAG) $(srcdir)/bzero.c -o pic/$@; \
diff --git a/libiberty/bsearch_r.c b/libiberty/bsearch_r.c
new file mode 100644
index 0000000..79ebae9
--- /dev/null
+++ b/libiberty/bsearch_r.c
@@ -0,0 +1,93 @@
+/*
+ * Copyright (c) 1990 Regents of the University of California.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. [rescinded 22 July 1999]
+ * 4. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+/*
+
+@deftypefn Supplemental void* bsearch_r (const void *@var{key}, @
+  const void *@var{base}, size_t @var{nmemb}, size_t @var{size}, @
+  int (*@var{compar})(const void *, const void *, void *), void *@var{arg})
+
+Performs a search over an array of @var{nmemb} elements pointed to by
+@var{base} for a member that matches the object pointed to by @var{key}.
+The size of each member is specified by @var{size}.  The array contents
+should be sorted in ascending order according to the @var{compar}
+comparison function.  This routine should take three arguments: the first
+two point to the @var{key} and to an array member, and the last is passed
+down unchanged from @code{bsearch_r}'s last argument.  It should return an
+integer less than, equal to, or greater than zero if the @var{key} object
+is respectively less than, matching, or greater than the array member.
+
+@end deftypefn
+
+*/
+
+#include "config.h"
+#include "ansidecl.h"
+#include <sys/types.h>		/* size_t */
+#include <stdio.h>
+
+/*
+ * Perform a binary search.
+ *
+ * The code below is a bit sneaky.  After a comparison fails, we
+ * divide the work in half by moving either left or right. If lim
+ * is odd, moving left simply involves halving lim: e.g., when lim
+ * is 5 we look at item 2, so we change lim to 2 so that we will
+ * look at items 0 & 1.  If lim is even, the same applies.  If lim
+ * is odd, moving right again involes halving lim, this time moving
+ * the base up one item past p: e.g., when lim is 5 we change base
+ * to item 3 and make lim 2 so that we will look at items 3 and 4.
+ * If lim is even, however, we have to shrink it by one before
+ * halving: e.g., when lim is 4, we still looked at item 2, so we
+ * have to make lim 3, then halve, obtaining 1, so that we will only
+ * look at item 3.
+ */
+void *
+bsearch_r (register const void *key, const void *base0,
+	   size_t nmemb, register size_t size,
+	   register int (*compar)(const void *, const void *, void *),
+	   void *arg)
+{
+	register const char *base = (const char *) base0;
+	register int lim, cmp;
+	register const void *p;
+
+	for (lim = nmemb; lim != 0; lim >>= 1) {
+		p = base + (lim >> 1) * size;
+		cmp = (*compar)(key, p, arg);
+		if (cmp == 0)
+			return (void *)p;
+		if (cmp > 0) {	/* key > p: move right */
+			base = (const char *)p + size;
+			lim--;
+		} /* else move left */
+	}
+	return (NULL);
+}
diff --git a/libiberty/configure b/libiberty/configure
index 3f82c5b..1f8e23f 100755
--- a/libiberty/configure
+++ b/libiberty/configure
@@ -5286,7 +5286,7 @@ $as_echo_n "checking for CET support... " >&6; }
 case "$host" in
   i[34567]86-*-linux* | x86_64-*-linux*)
     may_have_cet=yes
-    save_CFLAGS="$CFLAGS"
+    cet_save_CFLAGS="$CFLAGS"
     CFLAGS="$CFLAGS -fcf-protection"
     case "$enable_cet" in
       auto)
@@ -5337,7 +5337,7 @@ fi
 rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
 	;;
     esac
-    CFLAGS="$save_CFLAGS"
+    CFLAGS="$cet_save_CFLAGS"
     ;;
   *)
     may_have_cet=no
@@ -5345,9 +5345,9 @@ rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
     ;;
 esac
 
-save_CFLAGS="$CFLAGS"
+cet_save_CFLAGS="$CFLAGS"
 CFLAGS="$CFLAGS -fcf-protection=none"
-save_LDFLAGS="$LDFLAGS"
+cet_save_LDFLAGS="$LDFLAGS"
 LDFLAGS="$LDFLAGS -Wl,-z,ibt,-z,shstk"
 if test x$may_have_cet = xyes; then
   # Check whether -fcf-protection=none -Wl,-z,ibt,-z,shstk work.
@@ -5438,8 +5438,8 @@ else
   { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
 $as_echo "no" >&6; }
 fi
-CFLAGS="$save_CFLAGS"
-LDFLAGS="$save_LDFLAGS"
+CFLAGS="$cet_save_CFLAGS"
+LDFLAGS="$cet_save_LDFLAGS"
 
 
 
diff --git a/libiberty/d-demangle.c b/libiberty/d-demangle.c
index a970285..f2d6946 100644
--- a/libiberty/d-demangle.c
+++ b/libiberty/d-demangle.c
@@ -160,37 +160,42 @@ string_prepend (string *p, const char *s)
     }
 }
 
-/* What kinds of symbol we could be parsing.  */
-enum dlang_symbol_kinds
+/* Demangle information structure we pass around.  */
+struct dlang_info
 {
-  /* Top-level symbol, needs it's type checked.  */
-  dlang_top_level,
-  /* Function symbol, needs it's type checked.   */
-  dlang_function,
-  /* Strongly typed name, such as for classes, structs and enums.  */
-  dlang_type_name,
-  /* Template identifier.  */
-  dlang_template_ident,
-  /* Template symbol parameter.  */
-  dlang_template_param
+  /* The string we are demangling.  */
+  const char *s;
+  /* The index of the last back reference.  */
+  int last_backref;
 };
 
+/* Pass as the LEN to dlang_parse_template if symbol length is not known.  */
+enum { TEMPLATE_LENGTH_UNKNOWN = -1 };
+
 /* Prototypes for forward referenced functions */
-static const char *dlang_function_args (string *, const char *);
+static const char *dlang_function_type (string *, const char *,
+					struct dlang_info *);
 
-static const char *dlang_type (string *, const char *);
+static const char *dlang_function_args (string *, const char *,
+					struct dlang_info *);
+
+static const char *dlang_type (string *, const char *, struct dlang_info *);
 
 static const char *dlang_value (string *, const char *, const char *, char);
 
 static const char *dlang_parse_qualified (string *, const char *,
-					  enum dlang_symbol_kinds);
+					  struct dlang_info *, int);
 
 static const char *dlang_parse_mangle (string *, const char *,
-				       enum dlang_symbol_kinds);
+				       struct dlang_info *);
+
+static const char *dlang_parse_tuple (string *, const char *,
+				      struct dlang_info *);
 
-static const char *dlang_parse_tuple (string *, const char *);
+static const char *dlang_parse_template (string *, const char *,
+					 struct dlang_info *, long);
 
-static const char *dlang_parse_template (string *, const char *, long);
+static const char *dlang_lname (string *, const char *, long);
 
 
 /* Extract the number from MANGLED, and assign the result to RET.
@@ -267,6 +272,175 @@ dlang_call_convention_p (const char *mangled)
     }
 }
 
+/* Extract the back reference position from MANGLED, and assign the result
+   to RET.  Return the remaining string on success or NULL on failure.  */
+static const char *
+dlang_decode_backref (const char *mangled, long *ret)
+{
+  /* Return NULL if trying to extract something that isn't a digit.  */
+  if (mangled == NULL || !ISALPHA (*mangled))
+    return NULL;
+
+  /* Any identifier or non-basic type that has been emitted to the mangled
+     symbol before will not be emitted again, but is referenced by a special
+     sequence encoding the relative position of the original occurrence in the
+     mangled symbol name.
+
+     Numbers in back references are encoded with base 26 by upper case letters
+     A-Z for higher digits but lower case letters a-z for the last digit.
+
+	NumberBackRef:
+	    [a-z]
+	    [A-Z] NumberBackRef
+	    ^
+   */
+  (*ret) = 0;
+
+  while (ISALPHA (*mangled))
+    {
+      (*ret) *= 26;
+
+      /* If an overflow occured when multiplying by 26, the result
+	 will not be a multiple of 26.  */
+      if ((*ret % 26) != 0)
+	return NULL;
+
+      if (mangled[0] >= 'a' && mangled[0] <= 'z')
+	{
+	  (*ret) += mangled[0] - 'a';
+	  return mangled + 1;
+	}
+
+      (*ret) += mangled[0] - 'A';
+      mangled++;
+    }
+
+  return NULL;
+}
+
+/* Extract the symbol pointed at by the back reference and assign the result
+   to RET.  Return the remaining string on success or NULL on failure.  */
+static const char *
+dlang_backref (const char *mangled, const char **ret, struct dlang_info *info)
+{
+  (*ret) = NULL;
+
+  if (mangled == NULL || *mangled != 'Q')
+    return NULL;
+
+  /* Position of 'Q'.  */
+  const char *qpos = mangled;
+  long refpos;
+  mangled++;
+
+  mangled = dlang_decode_backref (mangled, &refpos);
+  if (mangled == NULL)
+    return NULL;
+
+  if (refpos <= 0 || refpos > qpos - info->s)
+    return NULL;
+
+  /* Set the position of the back reference.  */
+  (*ret) = qpos - refpos;
+
+  return mangled;
+}
+
+/* Demangle a back referenced symbol from MANGLED and append it to DECL.
+   Return the remaining string on success or NULL on failure.  */
+static const char *
+dlang_symbol_backref (string *decl, const char *mangled,
+		      struct dlang_info *info)
+{
+  /* An identifier back reference always points to a digit 0 to 9.
+
+	IdentifierBackRef:
+	    Q NumberBackRef
+	    ^
+   */
+  const char *backref;
+  long len;
+
+  /* Get position of the back reference.  */
+  mangled = dlang_backref (mangled, &backref, info);
+
+  /* Must point to a simple identifier.  */
+  backref = dlang_number (backref, &len);
+  if (backref == NULL)
+    return NULL;
+
+  backref = dlang_lname (decl, backref, len);
+  if (backref == NULL)
+    return NULL;
+
+  return mangled;
+}
+
+/* Demangle a back referenced type from MANGLED and append it to DECL.
+   IS_FUNCTION is 1 if the back referenced type is expected to be a function.
+   Return the remaining string on success or NULL on failure.  */
+static const char *
+dlang_type_backref (string *decl, const char *mangled, struct dlang_info *info,
+		    int is_function)
+{
+  /* A type back reference always points to a letter.
+
+	TypeBackRef:
+	    Q NumberBackRef
+	    ^
+   */
+  const char *backref;
+
+  /* If we appear to be moving backwards through the mangle string, then
+     bail as this may be a recursive back reference.  */
+  if (mangled - info->s >= info->last_backref)
+    return NULL;
+
+  int save_refpos = info->last_backref;
+  info->last_backref = mangled - info->s;
+
+  /* Get position of the back reference.  */
+  mangled = dlang_backref (mangled, &backref, info);
+
+  /* Must point to a type.  */
+  if (is_function)
+    backref = dlang_function_type (decl, backref, info);
+  else
+    backref = dlang_type (decl, backref, info);
+
+  info->last_backref = save_refpos;
+
+  if (backref == NULL)
+    return NULL;
+
+  return mangled;
+}
+
+/* Extract the beginning of a symbol name from MANGLED and
+   return 1 on success or 0 on failure.  */
+static int
+dlang_symbol_name_p (const char *mangled, struct dlang_info *info)
+{
+  long ret;
+  const char *qref = mangled;
+
+  if (ISDIGIT (*mangled))
+    return 1;
+
+  if (mangled[0] == '_' && mangled[1] == '_'
+      && (mangled[2] == 'T' || mangled[2] == 'U'))
+    return 1;
+
+  if (*mangled != 'Q')
+    return 0;
+
+  mangled = dlang_decode_backref (mangled + 1, &ret);
+  if (mangled == NULL || ret <= 0 || ret > qref - info->s)
+    return 0;
+
+  return ISDIGIT (qref[-ret]);
+}
+
 /* Demangle the calling convention from MANGLED and append it to DECL.
    Return the remaining string on success or NULL on failure.  */
 static const char *
@@ -404,6 +578,10 @@ dlang_attributes (string *decl, const char *mangled)
 	  mangled++;
 	  string_append (decl, "scope ");
 	  continue;
+	case 'm': /* @live */
+	  mangled++;
+	  string_append (decl, "@live ");
+	  continue;
 
 	default: /* unknown attribute */
 	  return NULL;
@@ -414,13 +592,39 @@ dlang_attributes (string *decl, const char *mangled)
   return mangled;
 }
 
+/* Demangle the function type from MANGLED without the return type.
+   The arguments are appended to ARGS, the calling convention is appended
+   to CALL and attributes are appended to ATTR.  Any of these can be NULL
+   to throw the information away.  Return the remaining string on success
+   or NULL on failure.  */
+static const char *
+dlang_function_type_noreturn (string *args, string *call, string *attr,
+			      const char *mangled, struct dlang_info *info)
+{
+  string dump;
+  string_init (&dump);
+
+  /* Skip over calling convention and attributes.  */
+  mangled = dlang_call_convention (call ? call : &dump, mangled);
+  mangled = dlang_attributes (attr ? attr : &dump, mangled);
+
+  if (args)
+    string_append (args, "(");
+
+  mangled = dlang_function_args (args ? args : &dump, mangled, info);
+  if (args)
+    string_append (args, ")");
+
+  string_delete (&dump);
+  return mangled;
+}
+
 /* Demangle the function type from MANGLED and append it to DECL.
    Return the remaining string on success or NULL on failure.  */
 static const char *
-dlang_function_type (string *decl, const char *mangled)
+dlang_function_type (string *decl, const char *mangled, struct dlang_info *info)
 {
   string attr, args, type;
-  size_t szattr, szargs, sztype;
 
   if (mangled == NULL || *mangled == '\0')
     return NULL;
@@ -435,27 +639,16 @@ dlang_function_type (string *decl, const char *mangled)
   string_init (&args);
   string_init (&type);
 
-  /* Function call convention.  */
-  mangled = dlang_call_convention (decl, mangled);
-
-  /* Function attributes.  */
-  mangled = dlang_attributes (&attr, mangled);
-  szattr = string_length (&attr);
-
-  /* Function arguments.  */
-  mangled = dlang_function_args (&args, mangled);
-  szargs = string_length (&args);
+  mangled = dlang_function_type_noreturn (&args, decl, &attr, mangled, info);
 
   /* Function return type.  */
-  mangled = dlang_type (&type, mangled);
-  sztype = string_length (&type);
+  mangled = dlang_type (&type, mangled, info);
 
   /* Append to decl in order. */
-  string_appendn (decl, type.b, sztype);
-  string_append (decl, "(");
-  string_appendn (decl, args.b, szargs);
-  string_append (decl, ") ");
-  string_appendn (decl, attr.b, szattr);
+  string_appendn (decl, type.b, string_length (&type));
+  string_appendn (decl, args.b, string_length (&args));
+  string_append (decl, " ");
+  string_appendn (decl, attr.b, string_length (&attr));
 
   string_delete (&attr);
   string_delete (&args);
@@ -466,7 +659,7 @@ dlang_function_type (string *decl, const char *mangled)
 /* Demangle the argument list from MANGLED and append it to DECL.
    Return the remaining string on success or NULL on failure.  */
 static const char *
-dlang_function_args (string *decl, const char *mangled)
+dlang_function_args (string *decl, const char *mangled, struct dlang_info *info)
 {
   size_t n = 0;
 
@@ -519,7 +712,7 @@ dlang_function_args (string *decl, const char *mangled)
 	  string_append (decl, "lazy ");
 	  break;
 	}
-      mangled = dlang_type (decl, mangled);
+      mangled = dlang_type (decl, mangled, info);
     }
 
   return mangled;
@@ -528,7 +721,7 @@ dlang_function_args (string *decl, const char *mangled)
 /* Demangle the type from MANGLED and append it to DECL.
    Return the remaining string on success or NULL on failure.  */
 static const char *
-dlang_type (string *decl, const char *mangled)
+dlang_type (string *decl, const char *mangled, struct dlang_info *info)
 {
   if (mangled == NULL || *mangled == '\0')
     return NULL;
@@ -538,19 +731,19 @@ dlang_type (string *decl, const char *mangled)
     case 'O': /* shared(T) */
       mangled++;
       string_append (decl, "shared(");
-      mangled = dlang_type (decl, mangled);
+      mangled = dlang_type (decl, mangled, info);
       string_append (decl, ")");
       return mangled;
     case 'x': /* const(T) */
       mangled++;
       string_append (decl, "const(");
-      mangled = dlang_type (decl, mangled);
+      mangled = dlang_type (decl, mangled, info);
       string_append (decl, ")");
       return mangled;
     case 'y': /* immutable(T) */
       mangled++;
       string_append (decl, "immutable(");
-      mangled = dlang_type (decl, mangled);
+      mangled = dlang_type (decl, mangled, info);
       string_append (decl, ")");
       return mangled;
     case 'N':
@@ -559,7 +752,7 @@ dlang_type (string *decl, const char *mangled)
 	{
 	  mangled++;
 	  string_append (decl, "inout(");
-	  mangled = dlang_type (decl, mangled);
+	  mangled = dlang_type (decl, mangled, info);
 	  string_append (decl, ")");
 	  return mangled;
 	}
@@ -567,7 +760,7 @@ dlang_type (string *decl, const char *mangled)
 	{
 	  mangled++;
 	  string_append (decl, "__vector(");
-	  mangled = dlang_type (decl, mangled);
+	  mangled = dlang_type (decl, mangled, info);
 	  string_append (decl, ")");
 	  return mangled;
 	}
@@ -575,7 +768,7 @@ dlang_type (string *decl, const char *mangled)
 	return NULL;
     case 'A': /* dynamic array (T[]) */
       mangled++;
-      mangled = dlang_type (decl, mangled);
+      mangled = dlang_type (decl, mangled, info);
       string_append (decl, "[]");
       return mangled;
     case 'G': /* static array (T[N]) */
@@ -590,7 +783,7 @@ dlang_type (string *decl, const char *mangled)
 	  num++;
 	  mangled++;
 	}
-      mangled = dlang_type (decl, mangled);
+      mangled = dlang_type (decl, mangled, info);
       string_append (decl, "[");
       string_appendn (decl, numptr, num);
       string_append (decl, "]");
@@ -603,10 +796,10 @@ dlang_type (string *decl, const char *mangled)
       mangled++;
 
       string_init (&type);
-      mangled = dlang_type (&type, mangled);
+      mangled = dlang_type (&type, mangled, info);
       sztype = string_length (&type);
 
-      mangled = dlang_type (decl, mangled);
+      mangled = dlang_type (decl, mangled, info);
       string_append (decl, "[");
       string_appendn (decl, type.b, sztype);
       string_append (decl, "]");
@@ -618,7 +811,7 @@ dlang_type (string *decl, const char *mangled)
       mangled++;
       if (!dlang_call_convention_p (mangled))
 	{
-	  mangled = dlang_type (decl, mangled);
+	  mangled = dlang_type (decl, mangled, info);
 	  string_append (decl, "*");
 	  return mangled;
 	}
@@ -630,7 +823,7 @@ dlang_type (string *decl, const char *mangled)
     case 'R': /* function T (C++) */
     case 'Y': /* function T (Objective-C) */
       /* Function pointer types don't include the trailing asterisk.  */
-      mangled = dlang_function_type (decl, mangled);
+      mangled = dlang_function_type (decl, mangled, info);
       string_append (decl, "function");
       return mangled;
     case 'I': /* ident T */
@@ -639,7 +832,7 @@ dlang_type (string *decl, const char *mangled)
     case 'E': /* enum T */
     case 'T': /* typedef T */
       mangled++;
-      return dlang_parse_qualified (decl, mangled, dlang_type_name);
+      return dlang_parse_qualified (decl, mangled, info, 0);
     case 'D': /* delegate T */
     {
       string mods;
@@ -650,7 +843,12 @@ dlang_type (string *decl, const char *mangled)
       mangled = dlang_type_modifiers (&mods, mangled);
       szmods = string_length (&mods);
 
-      mangled = dlang_function_type (decl, mangled);
+      /* Back referenced function type.  */
+      if (*mangled == 'Q')
+	mangled = dlang_type_backref (decl, mangled, info, 1);
+      else
+	mangled = dlang_function_type (decl, mangled, info);
+
       string_append (decl, "delegate");
       string_appendn (decl, mods.b, szmods);
 
@@ -659,7 +857,7 @@ dlang_type (string *decl, const char *mangled)
     }
     case 'B': /* tuple T */
       mangled++;
-      return dlang_parse_tuple (decl, mangled);
+      return dlang_parse_tuple (decl, mangled, info);
 
     /* Basic types */
     case 'n':
@@ -773,6 +971,10 @@ dlang_type (string *decl, const char *mangled)
 	}
       return NULL;
 
+    /* Back referenced type.  */
+    case 'Q':
+      return dlang_type_backref (decl, mangled, info, 0);
+
     default: /* unhandled */
       return NULL;
     }
@@ -781,152 +983,127 @@ dlang_type (string *decl, const char *mangled)
 /* Extract the identifier from MANGLED and append it to DECL.
    Return the remaining string on success or NULL on failure.  */
 static const char *
-dlang_identifier (string *decl, const char *mangled,
-		  enum dlang_symbol_kinds kind)
+dlang_identifier (string *decl, const char *mangled, struct dlang_info *info)
 {
   long len;
-  const char *endptr = dlang_number (mangled, &len);
 
-  if (endptr == NULL || len == 0)
+  if (mangled == NULL || *mangled == '\0')
     return NULL;
 
-  /* In template parameter symbols, the first character of the mangled
-     name can be a digit.  This causes ambiguity issues because the
-     digits of the two numbers are adjacent.  */
-  if (kind == dlang_template_param)
-    {
-      long psize = len;
-      const char *pend;
-      int saved = string_length (decl);
-
-      /* Work backwards until a match is found.  */
-      for (pend = endptr; endptr != NULL; pend--)
-	{
-	  mangled = pend;
+  if (*mangled == 'Q')
+    return dlang_symbol_backref (decl, mangled, info);
 
-	  /* Reached the beginning of the pointer to the name length,
-	     try parsing the entire symbol.  */
-	  if (psize == 0)
-	    {
-	      psize = len;
-	      pend = endptr;
-	      endptr = NULL;
-	    }
+  /* May be a template instance without a length prefix.  */
+  if (mangled[0] == '_' && mangled[1] == '_'
+      && (mangled[2] == 'T' || mangled[2] == 'U'))
+    return dlang_parse_template (decl, mangled, info, TEMPLATE_LENGTH_UNKNOWN);
 
-	  /* Check whether template parameter is a function with a valid
-	     return type or an untyped identifier.  */
-	  if (ISDIGIT (*mangled))
-	    mangled = dlang_parse_qualified (decl, mangled,
-					     dlang_template_ident);
-	  else if (strncmp (mangled, "_D", 2) == 0)
-	    mangled = dlang_parse_mangle (decl, mangled, dlang_function);
+  const char *endptr = dlang_number (mangled, &len);
 
-	  /* Check for name length mismatch.  */
-	  if (mangled && (mangled - pend) == psize)
-	    return mangled;
+  if (endptr == NULL || len == 0)
+    return NULL;
 
-	  psize /= 10;
-	  string_setlength (decl, saved);
-	}
+  if (strlen (endptr) < (size_t) len)
+    return NULL;
 
-      /* No match on any combinations.  */
-      return NULL;
-    }
-  else
-    {
-      if (strlen (endptr) < (size_t) len)
-	return NULL;
+  mangled = endptr;
 
-      mangled = endptr;
+  /* May be a template instance with a length prefix.  */
+  if (len >= 5 && mangled[0] == '_' && mangled[1] == '_'
+      && (mangled[2] == 'T' || mangled[2] == 'U'))
+    return dlang_parse_template (decl, mangled, info, len);
 
-      /* May be a template instance.  */
-      if (len >= 5 && mangled[0] == '_' && mangled[1] == '_'
-	  && (mangled[2] == 'T' || mangled[2] == 'U'))
-	return dlang_parse_template (decl, mangled, len);
+  return dlang_lname (decl, mangled, len);
+}
 
-      switch (len)
+/* Extract the plain identifier from MANGLED and prepend/append it to DECL
+   with special treatment for some magic compiler generted symbols.
+   Return the remaining string on success or NULL on failure.  */
+static const char *
+dlang_lname (string *decl, const char *mangled, long len)
+{
+  switch (len)
+    {
+    case 6:
+      if (strncmp (mangled, "__ctor", len) == 0)
 	{
-	case 6:
-	  if (strncmp (mangled, "__ctor", len) == 0)
-	    {
-	      /* Constructor symbol for a class/struct.  */
-	      string_append (decl, "this");
-	      mangled += len;
-	      return mangled;
-	    }
-	  else if (strncmp (mangled, "__dtor", len) == 0)
-	    {
-	      /* Destructor symbol for a class/struct.  */
-	      string_append (decl, "~this");
-	      mangled += len;
-	      return mangled;
-	    }
-	  else if (strncmp (mangled, "__initZ", len+1) == 0)
-	    {
-	      /* The static initialiser for a given symbol.  */
-	      string_prepend (decl, "initializer for ");
-	      string_setlength (decl, string_length (decl) - 1);
-	      mangled += len;
-	      return mangled;
-	    }
-	  else if (strncmp (mangled, "__vtblZ", len+1) == 0)
-	    {
-	      /* The vtable symbol for a given class.  */
-	      string_prepend (decl, "vtable for ");
-	      string_setlength (decl, string_length (decl) - 1);
-	      mangled += len;
-	      return mangled;
-	    }
-	  break;
-
-	case 7:
-	  if (strncmp (mangled, "__ClassZ", len+1) == 0)
-	    {
-	      /* The classinfo symbol for a given class.  */
-	      string_prepend (decl, "ClassInfo for ");
-	      string_setlength (decl, string_length (decl) - 1);
-	      mangled += len;
-	      return mangled;
-	    }
-	  break;
+	  /* Constructor symbol for a class/struct.  */
+	  string_append (decl, "this");
+	  mangled += len;
+	  return mangled;
+	}
+      else if (strncmp (mangled, "__dtor", len) == 0)
+	{
+	  /* Destructor symbol for a class/struct.  */
+	  string_append (decl, "~this");
+	  mangled += len;
+	  return mangled;
+	}
+      else if (strncmp (mangled, "__initZ", len + 1) == 0)
+	{
+	  /* The static initialiser for a given symbol.  */
+	  string_prepend (decl, "initializer for ");
+	  string_setlength (decl, string_length (decl) - 1);
+	  mangled += len;
+	  return mangled;
+	}
+      else if (strncmp (mangled, "__vtblZ", len + 1) == 0)
+	{
+	  /* The vtable symbol for a given class.  */
+	  string_prepend (decl, "vtable for ");
+	  string_setlength (decl, string_length (decl) - 1);
+	  mangled += len;
+	  return mangled;
+	}
+      break;
 
-	case 10:
-	  if (strncmp (mangled, "__postblitMFZ", len+3) == 0)
-	    {
-	      /* Postblit symbol for a struct.  */
-	      string_append (decl, "this(this)");
-	      mangled += len + 3;
-	      return mangled;
-	    }
-	  break;
+    case 7:
+      if (strncmp (mangled, "__ClassZ", len + 1) == 0)
+	{
+	  /* The classinfo symbol for a given class.  */
+	  string_prepend (decl, "ClassInfo for ");
+	  string_setlength (decl, string_length (decl) - 1);
+	  mangled += len;
+	  return mangled;
+	}
+      break;
 
-	case 11:
-	  if (strncmp (mangled, "__InterfaceZ", len+1) == 0)
-	    {
-	      /* The interface symbol for a given class.  */
-	      string_prepend (decl, "Interface for ");
-	      string_setlength (decl, string_length (decl) - 1);
-	      mangled += len;
-	      return mangled;
-	    }
-	  break;
+    case 10:
+      if (strncmp (mangled, "__postblitMFZ", len + 3) == 0)
+	{
+	  /* Postblit symbol for a struct.  */
+	  string_append (decl, "this(this)");
+	  mangled += len + 3;
+	  return mangled;
+	}
+      break;
 
-	case 12:
-	  if (strncmp (mangled, "__ModuleInfoZ", len+1) == 0)
-	    {
-	      /* The ModuleInfo symbol for a given module.  */
-	      string_prepend (decl, "ModuleInfo for ");
-	      string_setlength (decl, string_length (decl) - 1);
-	      mangled += len;
-	      return mangled;
-	    }
-	  break;
+    case 11:
+      if (strncmp (mangled, "__InterfaceZ", len + 1) == 0)
+	{
+	  /* The interface symbol for a given class.  */
+	  string_prepend (decl, "Interface for ");
+	  string_setlength (decl, string_length (decl) - 1);
+	  mangled += len;
+	  return mangled;
 	}
+      break;
 
-      string_appendn (decl, mangled, len);
-      mangled += len;
+    case 12:
+      if (strncmp (mangled, "__ModuleInfoZ", len + 1) == 0)
+	{
+	  /* The ModuleInfo symbol for a given module.  */
+	  string_prepend (decl, "ModuleInfo for ");
+	  string_setlength (decl, string_length (decl) - 1);
+	  mangled += len;
+	  return mangled;
+	}
+      break;
     }
 
+  string_appendn (decl, mangled, len);
+  mangled += len;
+
   return mangled;
 }
 
@@ -1347,22 +1524,22 @@ dlang_value (string *decl, const char *mangled, const char *name, char type)
 /* Extract and demangle the symbol in MANGLED and append it to DECL.
    Returns the remaining signature on success or NULL on failure.  */
 static const char *
-dlang_parse_mangle (string *decl, const char *mangled,
-		    enum dlang_symbol_kinds kind)
+dlang_parse_mangle (string *decl, const char *mangled, struct dlang_info *info)
 {
   /* A D mangled symbol is comprised of both scope and type information.
 
 	MangleName:
 	    _D QualifiedName Type
-	    _D QualifiedName M Type
 	    _D QualifiedName Z
 	    ^
      The caller should have guaranteed that the start pointer is at the
      above location.
+     Note that type is never a function type, but only the return type of
+     a function or the type of a variable.
    */
   mangled += 2;
 
-  mangled = dlang_parse_qualified (decl, mangled, dlang_top_level);
+  mangled = dlang_parse_qualified (decl, mangled, info, 1);
 
   if (mangled != NULL)
     {
@@ -1371,68 +1548,40 @@ dlang_parse_mangle (string *decl, const char *mangled,
 	mangled++;
       else
 	{
-	  string mods;
-	  int saved;
-
-	  /* Skip over 'this' parameter.  */
-	  if (*mangled == 'M')
-	    mangled++;
-
-	  /* Save the type modifiers for appending at the end if needed.  */
-	  string_init (&mods);
-	  mangled = dlang_type_modifiers (&mods, mangled);
-
-	  if (mangled && dlang_call_convention_p (mangled))
-	    {
-	      /* Skip over calling convention and attributes.  */
-	      saved = string_length (decl);
-	      mangled = dlang_call_convention (decl, mangled);
-	      mangled = dlang_attributes (decl, mangled);
-	      string_setlength (decl, saved);
-
-	      string_append (decl, "(");
-	      mangled = dlang_function_args (decl, mangled);
-	      string_append (decl, ")");
-
-	      /* Add any const/immutable/shared modifier. */
-	      string_appendn (decl, mods.b, string_length (&mods));
-	    }
-
-	  /* Consume the decl type of symbol.  */
-	  saved = string_length (decl);
-	  mangled = dlang_type (decl, mangled);
-	  string_setlength (decl, saved);
+	  /* Discard the declaration or return type.  */
+	  string type;
 
-	  string_delete (&mods);
+	  string_init (&type);
+	  mangled = dlang_type (&type, mangled, info);
+	  string_delete (&type);
 	}
     }
 
-  /* Check that the entire symbol was successfully demangled.  */
-  if (kind == dlang_top_level)
-    {
-      if (mangled == NULL || *mangled != '\0')
-	return NULL;
-    }
-
   return mangled;
 }
 
 /* Extract and demangle the qualified symbol in MANGLED and append it to DECL.
+   SUFFIX_MODIFIERS is 1 if we are printing modifiers on this after the symbol.
    Returns the remaining signature on success or NULL on failure.  */
 static const char *
 dlang_parse_qualified (string *decl, const char *mangled,
-		       enum dlang_symbol_kinds kind)
+		       struct dlang_info *info, int suffix_modifiers)
 {
   /* Qualified names are identifiers separated by their encoded length.
      Nested functions also encode their argument types without specifying
      what they return.
 
 	QualifiedName:
-	    SymbolName
-	    SymbolName QualifiedName
-	    SymbolName TypeFunctionNoReturn QualifiedName
-	    SymbolName M TypeModifiers TypeFunctionNoReturn QualifiedName
+	    SymbolFunctionName
+	    SymbolFunctionName QualifiedName
 	    ^
+
+	SymbolFunctionName:
+	    SymbolName
+	    SymbolName TypeFunctionNoReturn
+	    SymbolName M TypeFunctionNoReturn
+	    SymbolName M TypeModifiers TypeFunctionNoReturn
+
      The start pointer should be at the above location.
    */
   size_t n = 0;
@@ -1445,49 +1594,45 @@ dlang_parse_qualified (string *decl, const char *mangled,
       while (*mangled == '0')
 	mangled++;
 
-      mangled = dlang_identifier (decl, mangled, kind);
+      mangled = dlang_identifier (decl, mangled, info);
 
       /* Consume the encoded arguments.  However if this is not followed by the
-	 next encoded length, then this is not a continuation of a qualified
-	 name, in which case we backtrack and return the current unconsumed
-	 position of the mangled decl.  */
+	 next encoded length or mangle type, then this is not a continuation of
+	 a qualified name, in which case we backtrack and return the current
+	 unconsumed position of the mangled decl.  */
       if (mangled && (*mangled == 'M' || dlang_call_convention_p (mangled)))
 	{
+	  string mods;
 	  const char *start = mangled;
 	  int saved = string_length (decl);
 
+	  /* Save the type modifiers for appending at the end if needed.  */
+	  string_init (&mods);
+
 	  /* Skip over 'this' parameter and type modifiers.  */
 	  if (*mangled == 'M')
 	    {
 	      mangled++;
-	      mangled = dlang_type_modifiers (decl, mangled);
+	      mangled = dlang_type_modifiers (&mods, mangled);
 	      string_setlength (decl, saved);
 	    }
 
-	  /* The rule we expect to match in the mangled string is:
-
-		TypeFunctionNoReturn:
-		    CallConvention FuncAttrs Arguments ArgClose
-
-	     The calling convention and function attributes are not included
-	     in the demangled string.  */
-	  mangled = dlang_call_convention (decl, mangled);
-	  mangled = dlang_attributes (decl, mangled);
-	  string_setlength (decl, saved);
+	  mangled = dlang_function_type_noreturn (decl, NULL, NULL,
+						  mangled, info);
+	  if (suffix_modifiers)
+	    string_appendn (decl, mods.b, string_length (&mods));
 
-	  string_append (decl, "(");
-	  mangled = dlang_function_args (decl, mangled);
-	  string_append (decl, ")");
-
-	  if (mangled == NULL || !ISDIGIT (*mangled))
+	  if (mangled == NULL || *mangled == '\0')
 	    {
 	      /* Did not match the rule we were looking for.  */
 	      mangled = start;
 	      string_setlength (decl, saved);
 	    }
+
+	  string_delete (&mods);
 	}
     }
-  while (mangled && ISDIGIT (*mangled));
+  while (mangled && dlang_symbol_name_p (mangled, info));
 
   return mangled;
 }
@@ -1495,7 +1640,7 @@ dlang_parse_qualified (string *decl, const char *mangled,
 /* Demangle the tuple from MANGLED and append it to DECL.
    Return the remaining string on success or NULL on failure.  */
 static const char *
-dlang_parse_tuple (string *decl, const char *mangled)
+dlang_parse_tuple (string *decl, const char *mangled, struct dlang_info *info)
 {
   long elements;
 
@@ -1507,7 +1652,7 @@ dlang_parse_tuple (string *decl, const char *mangled)
 
   while (elements--)
     {
-      mangled = dlang_type (decl, mangled);
+      mangled = dlang_type (decl, mangled, info);
       if (mangled == NULL)
 	return NULL;
 
@@ -1519,10 +1664,71 @@ dlang_parse_tuple (string *decl, const char *mangled)
   return mangled;
 }
 
+/* Demangle the template symbol parameter from MANGLED and append it to DECL.
+   Return the remaining string on success or NULL on failure.  */
+static const char *
+dlang_template_symbol_param (string *decl, const char *mangled,
+			     struct dlang_info *info)
+{
+  if (strncmp (mangled, "_D", 2) == 0
+      && dlang_symbol_name_p (mangled + 2, info))
+    return dlang_parse_mangle (decl, mangled, info);
+
+  if (*mangled == 'Q')
+    return dlang_parse_qualified (decl, mangled, info, 0);
+
+  long len;
+  const char *endptr = dlang_number (mangled, &len);
+
+  if (endptr == NULL || len == 0)
+    return NULL;
+
+  /* In template parameter symbols generated by the frontend up to 2.076,
+     the symbol length is encoded and the first character of the mangled
+     name can be a digit.  This causes ambiguity issues because the digits
+     of the two numbers are adjacent.  */
+  long psize = len;
+  const char *pend;
+  int saved = string_length (decl);
+
+  /* Work backwards until a match is found.  */
+  for (pend = endptr; endptr != NULL; pend--)
+    {
+      mangled = pend;
+
+      /* Reached the beginning of the pointer to the name length,
+	 try parsing the entire symbol.  */
+      if (psize == 0)
+	{
+	  psize = len;
+	  pend = endptr;
+	  endptr = NULL;
+	}
+
+      /* Check whether template parameter is a function with a valid
+	 return type or an untyped identifier.  */
+      if (dlang_symbol_name_p (mangled, info))
+	mangled = dlang_parse_qualified (decl, mangled, info, 0);
+      else if (strncmp (mangled, "_D", 2) == 0
+	       && dlang_symbol_name_p (mangled + 2, info))
+	mangled = dlang_parse_mangle (decl, mangled, info);
+
+      /* Check for name length mismatch.  */
+      if (mangled && (endptr == NULL || (mangled - pend) == psize))
+	return mangled;
+
+      psize /= 10;
+      string_setlength (decl, saved);
+    }
+
+  /* No match on any combinations.  */
+  return NULL;
+}
+
 /* Demangle the argument list from MANGLED and append it to DECL.
    Return the remaining string on success or NULL on failure.  */
 static const char *
-dlang_template_args (string *decl, const char *mangled)
+dlang_template_args (string *decl, const char *mangled, struct dlang_info *info)
 {
   size_t n = 0;
 
@@ -1546,11 +1752,11 @@ dlang_template_args (string *decl, const char *mangled)
 	{
 	case 'S': /* Symbol parameter.  */
 	  mangled++;
-	  mangled = dlang_identifier (decl, mangled, dlang_template_param);
+	  mangled = dlang_template_symbol_param (decl, mangled, info);
 	  break;
 	case 'T': /* Type parameter.  */
 	  mangled++;
-	  mangled = dlang_type (decl, mangled);
+	  mangled = dlang_type (decl, mangled, info);
 	  break;
 	case 'V': /* Value parameter.  */
 	{
@@ -1561,10 +1767,20 @@ dlang_template_args (string *decl, const char *mangled)
 	  mangled++;
 	  type = *mangled;
 
+	  if (type == 'Q')
+	    {
+	      /* Value type is a back reference, peek at the real type.  */
+	      const char *backref;
+	      if (dlang_backref (mangled, &backref, info) == NULL)
+		return NULL;
+
+	      type = *backref;
+	    }
+
 	  /* In the few instances where the type is actually desired in
 	     the output, it should precede the value from dlang_value.  */
 	  string_init (&name);
-	  mangled = dlang_type (&name, mangled);
+	  mangled = dlang_type (&name, mangled, info);
 	  string_need (&name, 1);
 	  *(name.p) = '\0';
 
@@ -1572,7 +1788,20 @@ dlang_template_args (string *decl, const char *mangled)
 	  string_delete (&name);
 	  break;
 	}
+	case 'X': /* Externally mangled parameter.  */
+	{
+	  long len;
+	  const char *endptr;
 
+	  mangled++;
+	  endptr = dlang_number (mangled, &len);
+	  if (endptr == NULL || strlen (endptr) < (size_t) len)
+	    return NULL;
+
+	  string_appendn (decl, endptr, len);
+	  mangled = endptr + len;
+	  break;
+	}
 	default:
 	  return NULL;
 	}
@@ -1582,12 +1811,14 @@ dlang_template_args (string *decl, const char *mangled)
 }
 
 /* Extract and demangle the template symbol in MANGLED, expected to
-   be made up of LEN characters, and append it to DECL.
+   be made up of LEN characters (-1 if unknown), and append it to DECL.
    Returns the remaining signature on success or NULL on failure.  */
 static const char *
-dlang_parse_template (string *decl, const char *mangled, long len)
+dlang_parse_template (string *decl, const char *mangled,
+		      struct dlang_info *info, long len)
 {
   const char *start = mangled;
+  string args;
 
   /* Template instance names have the types and values of its parameters
      encoded into it.
@@ -1601,26 +1832,40 @@ dlang_parse_template (string *decl, const char *mangled, long len)
    */
 
   /* Template symbol.  */
-  if (!ISDIGIT (mangled[3]) || mangled[3] == '0')
+  if (!dlang_symbol_name_p (mangled + 3, info) || mangled[3] == '0')
     return NULL;
 
   mangled += 3;
 
   /* Template identifier.  */
-  mangled = dlang_identifier (decl, mangled, dlang_template_ident);
+  mangled = dlang_identifier (decl, mangled, info);
 
   /* Template arguments.  */
+  string_init (&args);
+  mangled = dlang_template_args (&args, mangled, info);
+
   string_append (decl, "!(");
-  mangled = dlang_template_args (decl, mangled);
+  string_appendn (decl, args.b, string_length (&args));
   string_append (decl, ")");
 
+  string_delete (&args);
+
   /* Check for template name length mismatch.  */
-  if (mangled && (mangled - start) != len)
+  if (len != TEMPLATE_LENGTH_UNKNOWN && mangled && (mangled - start) != len)
     return NULL;
 
   return mangled;
 }
 
+/* Initialize the information structure we use to pass around information.  */
+static void
+dlang_demangle_init_info (const char *mangled, int last_backref,
+			  struct dlang_info *info)
+{
+  info->s = mangled;
+  info->last_backref = last_backref;
+}
+
 /* Extract and demangle the symbol in MANGLED.  Returns the demangled
    signature on success or NULL on failure.  */
 
@@ -1644,7 +1889,13 @@ dlang_demangle (const char *mangled, int option ATTRIBUTE_UNUSED)
     }
   else
     {
-      if (dlang_parse_mangle (&decl, mangled, dlang_top_level) == NULL)
+      struct dlang_info info;
+
+      dlang_demangle_init_info (mangled, strlen (mangled), &info);
+      mangled = dlang_parse_mangle (&decl, mangled, &info);
+
+      /* Check that the entire symbol was successfully demangled.  */
+      if (mangled == NULL || *mangled != '\0')
 	string_delete (&decl);
     }
 
diff --git a/libiberty/functions.texi b/libiberty/functions.texi
index 1784ae7..e4d74b5 100644
--- a/libiberty/functions.texi
+++ b/libiberty/functions.texi
@@ -84,6 +84,23 @@ is respectively less than, matching, or greater than the array member.
 
 @end deftypefn
 
+@c bsearch_r.c:33
+@deftypefn Supplemental void* bsearch_r (const void *@var{key}, @
+  const void *@var{base}, size_t @var{nmemb}, size_t @var{size}, @
+  int (*@var{compar})(const void *, const void *, void *), void *@var{arg})
+
+Performs a search over an array of @var{nmemb} elements pointed to by
+@var{base} for a member that matches the object pointed to by @var{key}.
+The size of each member is specified by @var{size}.  The array contents
+should be sorted in ascending order according to the @var{compar}
+comparison function.  This routine should take three arguments: the first
+two point to the @var{key} and to an array member, and the last is passed
+down unchanged from @code{bsearch_r}'s last argument.  It should return an
+integer less than, equal to, or greater than zero if the @var{key} object
+is respectively less than, matching, or greater than the array member.
+
+@end deftypefn
+
 @c argv.c:138
 @deftypefn Extension char** buildargv (char *@var{sp})
 
@@ -175,7 +192,7 @@ Concatenate zero or more of strings and return the result in freshly
 
 @end deftypefn
 
-@c argv.c:487
+@c argv.c:495
 @deftypefn Extension int countargv (char * const *@var{argv})
 
 Return the number of elements in @var{argv}.
@@ -240,7 +257,7 @@ symbolic name or message.
 
 @end deftypefn
 
-@c argv.c:344
+@c argv.c:352
 @deftypefn Extension void expandargv (int *@var{argcp}, char ***@var{argvp})
 
 The @var{argcp} and @code{argvp} arguments are pointers to the usual
diff --git a/libiberty/testsuite/d-demangle-expected b/libiberty/testsuite/d-demangle-expected
index 490d4e1..e3f32e3 100644
--- a/libiberty/testsuite/d-demangle-expected
+++ b/libiberty/testsuite/d-demangle-expected
@@ -462,6 +462,10 @@ _D8demangle4testFDFNiZaZv
 demangle.test(char() @nogc delegate)
 #
 --format=dlang
+_D8demangle4testFDFNmZaZv
+demangle.test(char() @live delegate)
+#
+--format=dlang
 _D8demangle4testFDFNaNbZaZv
 demangle.test(char() pure nothrow delegate)
 #
@@ -538,6 +542,10 @@ _D8demangle4testFPFNiZaZv
 demangle.test(char() @nogc function)
 #
 --format=dlang
+_D8demangle4testFPFNmZaZv
+demangle.test(char() @live function)
+#
+--format=dlang
 _D8demangle4testFPFNaNbZaZv
 demangle.test(char() pure nothrow function)
 #
@@ -1326,3 +1334,75 @@ _D1_B699999999961*
 --format=dlang
 _D5__T1fVHacA6666666666_
 _D5__T1fVHacA6666666666_
+#
+--format=dlang
+_D3std5range15__T4iotaTtTtTtZ4iotaFtttZ6Result7opIndexMNgFNaNbNiNfmZNgt
+std.range.iota!(ushort, ushort, ushort).iota(ushort, ushort, ushort).Result.opIndex(ulong) inout
+#
+--format=dlang
+_D3std6format77__T6getNthVAyaa13_696e7465676572207769647468S233std6traits10isIntegralTiTkTkZ6getNthFNaNfkkkZi
+std.format.getNth!("integer width", std.traits.isIntegral, int, uint, uint).getNth(uint, uint, uint)
+#
+--format=dlang
+_D3std11parallelism42__T16RoundRobinBufferTDFKAaZvTDxFNaNdNeZbZ16RoundRobinBuffer5primeMFZv
+std.parallelism.RoundRobinBuffer!(void(ref char[]) delegate, bool() pure @property @trusted delegate const).RoundRobinBuffer.prime()
+#
+--format=dlang
+_D4core4stdc5errnoQgFZi
+core.stdc.errno.errno()
+#
+--format=dlang
+_D4testFS10structnameQnZb
+test(structname, structname)
+#
+--format=dlang
+_D3std11parallelism__T4TaskS8unittest3cmpTAyaTQeZQBb6__dtorMFNfZv
+std.parallelism.Task!(unittest.cmp, immutable(char)[], immutable(char)[]).Task.~this()
+#
+--format=dlang
+_D13testexpansion44__T1sTS13testexpansion8__T1sTiZ1sFiZ6ResultZ1sFS13testexpansion8__T1sTiZ1sFiZ6ResultZ6Result3fooMFNaNfZv
+testexpansion.s!(testexpansion.s!(int).s(int).Result).s(testexpansion.s!(int).s(int).Result).Result.foo()
+#
+--format=dlang
+_D13testexpansion__T1sTSQw__TQjTiZQoFiZ6ResultZQBbFQBcZQq3fooMFNaNfZv
+testexpansion.s!(testexpansion.s!(int).s(int).Result).s(testexpansion.s!(int).s(int).Result).Result.foo()
+#
+--format=dlang
+_D3std4conv__T7enumRepTyAaTEQBa12experimental9allocator15building_blocks15stats_collector7OptionsVQCti64ZQDnyQDh
+std.conv.enumRep!(immutable(char[]), std.experimental.allocator.building_blocks.stats_collector.Options, 64).enumRep
+#
+--format=dlang
+_D3std12experimental9allocator6common__T10reallocateTSQCaQBzQBo15building_blocks17kernighan_ritchie__T8KRRegionTSQEhQEgQDvQCh14null_allocator13NullAllocatorZQCdZQErFNaNbNiKQEpKAvmZb
+std.experimental.allocator.common.reallocate!(std.experimental.allocator.building_blocks.kernighan_ritchie.KRRegion!(std.experimental.allocator.building_blocks.null_allocator.NullAllocator).KRRegion).reallocate(ref std.experimental.allocator.building_blocks.kernighan_ritchie.KRRegion!(std.experimental.allocator.building_blocks.null_allocator.NullAllocator).KRRegion, ref void[], ulong)
+#
+--format=dlang
+_D3std9exception__T11doesPointToTASQBh5regex8internal2ir10NamedGroupTQBkTvZQCeFNaNbNiNeKxASQDlQCeQCbQBvQBvKxQtZb
+std.exception.doesPointTo!(std.regex.internal.ir.NamedGroup[], std.regex.internal.ir.NamedGroup[], void).doesPointTo(ref const(std.regex.internal.ir.NamedGroup[]), ref const(std.regex.internal.ir.NamedGroup[]))
+#
+--format=dlang
+_D3std9algorithm9iteration__T14SplitterResultS_DQBu3uni7isWhiteFNaNbNiNfwZbTAyaZQBz9__xtoHashFNbNeKxSQDvQDuQDn__TQDgS_DQEnQCtQCsQCnTQCeZQEdZm
+std.algorithm.iteration.SplitterResult!(std.uni.isWhite(dchar), immutable(char)[]).SplitterResult.__xtoHash(ref const(std.algorithm.iteration.SplitterResult!(std.uni.isWhite, immutable(char)[]).SplitterResult))
+#
+--format=dlang
+_D3std8typecons__T7TypedefTCQBaQz19__unittestL6513_208FNfZ7MyClassVQBonVAyanZQCh6__ctorMFNaNbNcNiNfQCuZSQDyQDx__TQDrTQDmVQDqnVQCcnZQEj
+std.typecons.Typedef!(std.typecons.__unittestL6513_208().MyClass, null, null).Typedef.this(std.typecons.__unittestL6513_208().MyClass)
+#
+--format=dlang
+_D3std6getopt__TQkTAyaTDFNaNbNiNfQoZvTQtTDQsZQBnFNfKAQBiQBlQBkQBrQyZSQCpQCo12GetoptResult
+std.getopt.getopt!(immutable(char)[], void(immutable(char)[]) pure nothrow @nogc @safe delegate, immutable(char)[], void(immutable(char)[]) pure nothrow @nogc @safe delegate).getopt(ref immutable(char)[][], immutable(char)[], void(immutable(char)[]) pure nothrow @nogc @safe delegate, immutable(char)[], void(immutable(char)[]) pure nothrow @nogc @safe delegate)
+#
+--format=dlang
+_D3std5regex8internal9kickstart__T7ShiftOrTaZQl11ShiftThread__T3setS_DQCqQCpQCmQCg__TQBzTaZQCfQBv10setInvMaskMFNaNbNiNfkkZvZQCjMFNaNfwZv
+std.regex.internal.kickstart.ShiftOr!(char).ShiftOr.ShiftThread.set!(std.regex.internal.kickstart.ShiftOr!(char).ShiftOr.ShiftThread.setInvMask(uint, uint)).set(dchar)
+#
+--format=dlang
+_D3std5stdio4File__T8lockImplX10LockFileExTykZQBaMFmmykZi
+std.stdio.File.lockImpl!(LockFileEx, immutable(uint)).lockImpl(ulong, ulong, immutable(uint))
+#
+--format=dlang
+_D3std9algorithm9iteration__T12FilterResultSQBq8typecons__T5TupleTiVAyaa1_61TiVQla1_62TiVQva1_63ZQBm__T6renameVHiQBtA2i0a1_63i2a1_61ZQBeMFNcZ9__lambda1TAiZQEw9__xtoHashFNbNeKxSQGsQGrQGk__TQGdSQHiQFs__TQFmTiVQFja1_61TiVQFua1_62TiVQGfa1_63ZQGx__TQFlVQFhA2i0a1_63i2a1_61ZQGjMFNcZQFfTQEyZQJvZm
+std.algorithm.iteration.FilterResult!(std.typecons.Tuple!(int, "a", int, "b", int, "c").Tuple.rename!([0:"c", 2:"a"]).rename().__lambda1, int[]).FilterResult.__xtoHash(ref const(std.algorithm.iteration.FilterResult!(std.typecons.Tuple!(int, "a", int, "b", int, "c").Tuple.rename!([0:"c", 2:"a"]).rename().__lambda1, int[]).FilterResult))
+#
+--format=dlang
+_D3std3uni__T6toCaseS_DQvQt12toLowerIndexFNaNbNiNewZtVii1043S_DQCjQCi10toLowerTabFNaNbNiNemZwSQDo5ascii7toLowerTAyaZQDzFNaNeQmZ14__foreachbody2MFNaNeKmKwZ14__foreachbody3MFNaNeKwZi
+std.uni.toCase!(std.uni.toLowerIndex(dchar), 1043, std.uni.toLowerTab(ulong), std.ascii.toLower, immutable(char)[]).toCase(immutable(char)[]).__foreachbody2(ref ulong, ref dchar).__foreachbody3(ref dchar)