libiberty: Handle @live attribute in D demangler.

Adds support for demangling D functions annotated with the new
ownership/borrowing system attribute.

libiberty/ChangeLog:

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

libiberty/ChangeLog

@@ -1,3 +1,8 @@
+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>
 

libiberty/d-demangle.c

@@ -578,6 +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;

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)
 #