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[svn:parrot] r34563 - trunk/compilers/pirc/new

From:
kjs
Date:
December 29, 2008 02:33
Subject:
[svn:parrot] r34563 - trunk/compilers/pirc/new
Message ID:
20081229103327.2934BCB9FA@x12.develooper.com
Author: kjs
Date: Mon Dec 29 02:33:25 2008
New Revision: 34563

Modified:
   trunk/compilers/pirc/new/bcgen.c
   trunk/compilers/pirc/new/pir.y
   trunk/compilers/pirc/new/pirparser.c

Log:
[pirc] create a signature pmc for :multi(), without any types.
+ add the trick stolen from imcc, that numtypes=1 means :multi(), n=2 means :multi(Type1), n=3 means :multi(Type1,Type2), etc. n is always 1 higher than actual type. If n=1, "__VOID" signature is generated.

Modified: trunk/compilers/pirc/new/bcgen.c
==============================================================================
--- trunk/compilers/pirc/new/bcgen.c	(original)
+++ trunk/compilers/pirc/new/bcgen.c	Mon Dec 29 02:33:25 2008
@@ -424,6 +424,17 @@
     /* set its size as specified in type_count */
     VTABLE_set_integer_native(bc->interp, multi_signature, type_count);
 
+
+    if (type_count == 1) { /* no actual types, just empty :multi() flag. */
+        STRING * const sig     = string_from_literal(bc->interp, "__VOID");
+        PMC    * const sig_pmc = pmc_new(bc->interp, enum_class_String);
+
+        VTABLE_set_string_native(bc->interp, sig_pmc, sig);
+        VTABLE_set_pmc_keyed_int(bc->interp, multi_signature, 0, sig_pmc);
+
+        return multi_signature;
+    }
+
     /* add all multi types to the PMC array */
     for (i = 0; i < type_count; ++i) {
 

Modified: trunk/compilers/pirc/new/pir.y
==============================================================================
--- trunk/compilers/pirc/new/pir.y	(original)
+++ trunk/compilers/pirc/new/pir.y	Mon Dec 29 02:33:25 2008
@@ -740,14 +740,17 @@
                   ;
 
 opt_multi_types   : /* empty */
-                        { $$ = 0; }
+                        { $$ = 1; /* n=1 means :multi() -- without any types. */ }
                   | multi_types
                         { $$ = $1; }
                   ;
 
 multi_types       : multi_type
                         {
-                          $$ = 1; /* start counting multi types */
+                          $$ = 2; /* start counting multi types; always 1 higher than actual number
+                                   * so that n=0 means no :multi, n=1 means :multi(), n=2 means
+                                   * :multi(Type1), n=3 means :multi(Type1,Type2), etc.
+                                   */
                           add_sub_multi_type(lexer, $1);
                         }
                   | multi_types ',' multi_type

Modified: trunk/compilers/pirc/new/pirparser.c
==============================================================================
--- trunk/compilers/pirc/new/pirparser.c	(original)
+++ trunk/compilers/pirc/new/pirparser.c	Mon Dec 29 02:33:25 2008
@@ -1056,42 +1056,42 @@
      653,   658,   662,   666,   671,   672,   676,   678,   682,   686,
      692,   696,   700,   701,   704,   705,   708,   710,   712,   714,
      716,   718,   720,   722,   724,   726,   728,   730,   732,   734,
-     738,   743,   744,   748,   753,   760,   762,   764,   768,   777,
-     778,   782,   786,   791,   792,   796,   797,   798,   801,   808,
-     814,   815,   825,   827,   830,   831,   832,   833,   834,   835,
-     836,   837,   838,   839,   840,   841,   842,   843,   844,   850,
-     853,   858,   859,   864,   865,   868,   870,   878,   886,   887,
-     889,   892,   898,   899,   908,   909,   910,   911,   919,   923,
-     927,   936,   943,   950,   953,   954,   957,   966,   973,   976,
-     977,   980,   981,   984,  1020,  1022,  1029,  1031,  1036,  1038,
-    1042,  1065,  1069,  1071,  1080,  1091,  1103,  1113,  1116,  1117,
-    1120,  1129,  1138,  1143,  1148,  1169,  1174,  1215,  1233,  1240,
-    1245,  1256,  1267,  1278,  1289,  1294,  1299,  1304,  1314,  1333,
-    1367,  1369,  1371,  1373,  1375,  1377,  1379,  1381,  1386,  1395,
-    1397,  1399,  1401,  1403,  1405,  1407,  1409,  1411,  1413,  1425,
-    1430,  1432,  1434,  1436,  1438,  1440,  1442,  1444,  1446,  1448,
-    1450,  1452,  1454,  1485,  1511,  1519,  1528,  1537,  1539,  1541,
-    1543,  1545,  1549,  1554,  1556,  1561,  1562,  1565,  1566,  1569,
-    1570,  1573,  1581,  1585,  1587,  1591,  1595,  1596,  1599,  1614,
-    1618,  1619,  1622,  1634,  1635,  1639,  1641,  1645,  1649,  1651,
-    1653,  1659,  1660,  1665,  1666,  1670,  1672,  1681,  1683,  1687,
-    1691,  1693,  1695,  1699,  1700,  1703,  1723,  1730,  1732,  1742,
-    1759,  1761,  1763,  1767,  1776,  1781,  1786,  1787,  1791,  1793,
-    1797,  1802,  1803,  1807,  1809,  1811,  1813,  1823,  1827,  1828,
-    1829,  1830,  1833,  1838,  1849,  1856,  1861,  1862,  1866,  1868,
-    1872,  1873,  1876,  1880,  1884,  1888,  1897,  1907,  1908,  1913,
-    1915,  1920,  1925,  1926,  1930,  1932,  1936,  1942,  1943,  1947,
-    1949,  1957,  1958,  1962,  1966,  1969,  1970,  1973,  1977,  1981,
-    1983,  1985,  1987,  1995,  1996,  2000,  2001,  2002,  2003,  2006,
-    2007,  2008,  2009,  2010,  2011,  2014,  2015,  2016,  2017,  2025,
-    2028,  2029,  2040,  2041,  2042,  2043,  2047,  2048,  2051,  2052,
-    2053,  2054,  2055,  2056,  2057,  2058,  2061,  2062,  2063,  2066,
-    2067,  2068,  2069,  2070,  2071,  2072,  2073,  2074,  2075,  2076,
-    2077,  2078,  2079,  2080,  2081,  2082,  2083,  2084,  2085,  2086,
-    2087,  2088,  2094,  2095,  2096,  2097,  2098,  2099,  2100,  2101,
-    2102,  2103,  2104,  2105,  2117,  2125,  2129,  2130,  2133,  2134,
-    2135,  2136,  2137,  2138,  2141,  2143,  2144,  2147,  2148,  2151,
-    2155,  2160
+     738,   743,   744,   748,   756,   763,   765,   767,   771,   780,
+     781,   785,   789,   794,   795,   799,   800,   801,   804,   811,
+     817,   818,   828,   830,   833,   834,   835,   836,   837,   838,
+     839,   840,   841,   842,   843,   844,   845,   846,   847,   853,
+     856,   861,   862,   867,   868,   871,   873,   881,   889,   890,
+     892,   895,   901,   902,   911,   912,   913,   914,   922,   926,
+     930,   939,   946,   953,   956,   957,   960,   969,   976,   979,
+     980,   983,   984,   987,  1023,  1025,  1032,  1034,  1039,  1041,
+    1045,  1068,  1072,  1074,  1083,  1094,  1106,  1116,  1119,  1120,
+    1123,  1132,  1141,  1146,  1151,  1172,  1177,  1218,  1236,  1243,
+    1248,  1259,  1270,  1281,  1292,  1297,  1302,  1307,  1317,  1336,
+    1370,  1372,  1374,  1376,  1378,  1380,  1382,  1384,  1389,  1398,
+    1400,  1402,  1404,  1406,  1408,  1410,  1412,  1414,  1416,  1428,
+    1433,  1435,  1437,  1439,  1441,  1443,  1445,  1447,  1449,  1451,
+    1453,  1455,  1457,  1488,  1514,  1522,  1531,  1540,  1542,  1544,
+    1546,  1548,  1552,  1557,  1559,  1564,  1565,  1568,  1569,  1572,
+    1573,  1576,  1584,  1588,  1590,  1594,  1598,  1599,  1602,  1617,
+    1621,  1622,  1625,  1637,  1638,  1642,  1644,  1648,  1652,  1654,
+    1656,  1662,  1663,  1668,  1669,  1673,  1675,  1684,  1686,  1690,
+    1694,  1696,  1698,  1702,  1703,  1706,  1726,  1733,  1735,  1745,
+    1762,  1764,  1766,  1770,  1779,  1784,  1789,  1790,  1794,  1796,
+    1800,  1805,  1806,  1810,  1812,  1814,  1816,  1826,  1830,  1831,
+    1832,  1833,  1836,  1841,  1852,  1859,  1864,  1865,  1869,  1871,
+    1875,  1876,  1879,  1883,  1887,  1891,  1900,  1910,  1911,  1916,
+    1918,  1923,  1928,  1929,  1933,  1935,  1939,  1945,  1946,  1950,
+    1952,  1960,  1961,  1965,  1969,  1972,  1973,  1976,  1980,  1984,
+    1986,  1988,  1990,  1998,  1999,  2003,  2004,  2005,  2006,  2009,
+    2010,  2011,  2012,  2013,  2014,  2017,  2018,  2019,  2020,  2028,
+    2031,  2032,  2043,  2044,  2045,  2046,  2050,  2051,  2054,  2055,
+    2056,  2057,  2058,  2059,  2060,  2061,  2064,  2065,  2066,  2069,
+    2070,  2071,  2072,  2073,  2074,  2075,  2076,  2077,  2078,  2079,
+    2080,  2081,  2082,  2083,  2084,  2085,  2086,  2087,  2088,  2089,
+    2090,  2091,  2097,  2098,  2099,  2100,  2101,  2102,  2103,  2104,
+    2105,  2106,  2107,  2108,  2120,  2128,  2132,  2133,  2136,  2137,
+    2138,  2139,  2140,  2141,  2144,  2146,  2147,  2150,  2151,  2154,
+    2158,  2163
 };
 #endif
 
@@ -2788,7 +2788,7 @@
 
   case 71:
 #line 743 "pir.y"
-    { (yyval.uval) = 0; ;}
+    { (yyval.uval) = 1; /* n=1 means :multi() -- without any types. */ ;}
     break;
 
   case 72:
@@ -2799,13 +2799,16 @@
   case 73:
 #line 749 "pir.y"
     {
-                          (yyval.uval) = 1; /* start counting multi types */
+                          (yyval.uval) = 2; /* start counting multi types; always 1 higher than actual number
+                                   * so that n=0 means no :multi, n=1 means :multi(), n=2 means
+                                   * :multi(Type1), n=3 means :multi(Type1,Type2), etc.
+                                   */
                           add_sub_multi_type(lexer, (yyvsp[(1) - (1)].expr));
                         ;}
     break;
 
   case 74:
-#line 754 "pir.y"
+#line 757 "pir.y"
     {
                           ++(yyval.uval);
                           add_sub_multi_type(lexer, (yyvsp[(3) - (3)].expr));
@@ -2813,22 +2816,22 @@
     break;
 
   case 75:
-#line 761 "pir.y"
+#line 764 "pir.y"
     { (yyval.expr) = expr_from_ident(lexer, (yyvsp[(1) - (1)].sval)); ;}
     break;
 
   case 76:
-#line 763 "pir.y"
+#line 766 "pir.y"
     { (yyval.expr) = expr_from_string(lexer, (yyvsp[(1) - (1)].sval)); ;}
     break;
 
   case 77:
-#line 765 "pir.y"
+#line 768 "pir.y"
     { (yyval.expr) = expr_from_key(lexer, (yyvsp[(1) - (1)].key)); ;}
     break;
 
   case 78:
-#line 769 "pir.y"
+#line 772 "pir.y"
     {
                            /* if there are parameters, then emit a get_params instruction. */
                            if ((yyvsp[(1) - (1)].uval) > 0)
@@ -2837,37 +2840,37 @@
     break;
 
   case 79:
-#line 777 "pir.y"
+#line 780 "pir.y"
     { (yyval.uval) = 0; ;}
     break;
 
   case 80:
-#line 779 "pir.y"
+#line 782 "pir.y"
     { ++(yyval.uval); /* count number of parameters */ ;}
     break;
 
   case 81:
-#line 783 "pir.y"
+#line 786 "pir.y"
     { set_param_flag(lexer, (yyvsp[(2) - (4)].targ), (yyvsp[(3) - (4)].ival)); ;}
     break;
 
   case 82:
-#line 787 "pir.y"
+#line 790 "pir.y"
     { (yyval.targ) = add_param(lexer, (yyvsp[(1) - (2)].ival), (yyvsp[(2) - (2)].sval)); ;}
     break;
 
   case 83:
-#line 791 "pir.y"
+#line 794 "pir.y"
     { (yyval.ival) = 0; ;}
     break;
 
   case 84:
-#line 793 "pir.y"
+#line 796 "pir.y"
     { SET_FLAG((yyval.ival), (yyvsp[(2) - (2)].ival)); ;}
     break;
 
   case 88:
-#line 802 "pir.y"
+#line 805 "pir.y"
     { (yyval.ival) = TARGET_FLAG_INVOCANT;
                            /* XXX handle multi_type */
 
@@ -2875,12 +2878,12 @@
     break;
 
   case 89:
-#line 809 "pir.y"
+#line 812 "pir.y"
     { (yyval.ival) = TARGET_FLAG_UNIQUE_REG; ;}
     break;
 
   case 91:
-#line 816 "pir.y"
+#line 819 "pir.y"
     {
                          ++lexer->stmt_counter;
                          /* increment the logical statement counter; a statement can be
@@ -2891,37 +2894,37 @@
     break;
 
   case 92:
-#line 826 "pir.y"
+#line 829 "pir.y"
     { set_label(lexer, (yyvsp[(1) - (2)].sval)); ;}
     break;
 
   case 110:
-#line 854 "pir.y"
+#line 857 "pir.y"
     { (yyval.sval) = expand_macro(yyscanner, (yyvsp[(1) - (3)].mval), (yyvsp[(2) - (3)].pval)); ;}
     break;
 
   case 111:
-#line 858 "pir.y"
+#line 861 "pir.y"
     { (yyval.pval) = NULL; ;}
     break;
 
   case 112:
-#line 860 "pir.y"
+#line 863 "pir.y"
     { (yyval.pval) = (yyvsp[(2) - (3)].pval); ;}
     break;
 
   case 113:
-#line 864 "pir.y"
+#line 867 "pir.y"
     { (yyval.pval) = NULL; ;}
     break;
 
   case 115:
-#line 869 "pir.y"
+#line 872 "pir.y"
     { (yyval.pval) = new_macro_param((yyvsp[(1) - (1)].sval)); ;}
     break;
 
   case 116:
-#line 871 "pir.y"
+#line 874 "pir.y"
     {
                           macro_param *param = new_macro_param((yyvsp[(3) - (3)].sval));
                           param->next = (yyvsp[(1) - (3)].pval);
@@ -2930,7 +2933,7 @@
     break;
 
   case 117:
-#line 879 "pir.y"
+#line 882 "pir.y"
     {
                           symbol *sym = find_symbol(lexer, (yyvsp[(1) - (1)].sval));
                           if (sym == NULL) {
@@ -2941,22 +2944,22 @@
     break;
 
   case 119:
-#line 888 "pir.y"
+#line 891 "pir.y"
     { (yyval.sval) = expand_macro(yyscanner, (yyvsp[(1) - (2)].mval), (yyvsp[(2) - (2)].pval)); ;}
     break;
 
   case 121:
-#line 893 "pir.y"
+#line 896 "pir.y"
     { (yyval.sval) = (yyvsp[(2) - (3)].sval); ;}
     break;
 
   case 122:
-#line 898 "pir.y"
+#line 901 "pir.y"
     { (yyval.sval) = ""; ;}
     break;
 
   case 123:
-#line 900 "pir.y"
+#line 903 "pir.y"
     { /* XXX cleanup memory stuff */
                           char *newbuff = (char *)mem_sys_allocate((strlen((yyvsp[(1) - (2)].sval)) + strlen((yyvsp[(2) - (2)].sval)) + 2)
                                                                    * sizeof (char));
@@ -2966,17 +2969,17 @@
     break;
 
   case 127:
-#line 912 "pir.y"
+#line 915 "pir.y"
     { (yyval.sval) = expand_macro(yyscanner, (yyvsp[(1) - (2)].mval), (yyvsp[(2) - (2)].pval)); ;}
     break;
 
   case 128:
-#line 920 "pir.y"
+#line 923 "pir.y"
     { set_instr(lexer, NULL); ;}
     break;
 
   case 130:
-#line 928 "pir.y"
+#line 931 "pir.y"
     {
                            if (lexer->parse_errors > MAX_NUM_ERRORS)
                                panic(lexer, "Too many errors. Compilation aborted.\n");
@@ -2986,7 +2989,7 @@
     break;
 
   case 131:
-#line 937 "pir.y"
+#line 940 "pir.y"
     {
                            set_instrf(lexer, "null", "%T", (yyvsp[(2) - (3)].targ));
                            get_opinfo(yyscanner);
@@ -2994,7 +2997,7 @@
     break;
 
   case 132:
-#line 944 "pir.y"
+#line 947 "pir.y"
     {
                            set_instrf(lexer, "get_results", "%T", (yyvsp[(2) - (3)].targ));
                            get_opinfo(yyscanner);
@@ -3002,7 +3005,7 @@
     break;
 
   case 136:
-#line 958 "pir.y"
+#line 961 "pir.y"
     { /* at this point, TK_IDENT may in fact be a symbol identifier,
                             * not an op, so don't do any checks like is_parrot_op() just yet.
                             */
@@ -3012,7 +3015,7 @@
     break;
 
   case 137:
-#line 967 "pir.y"
+#line 970 "pir.y"
     { /* when this rule is activated, the initial identifier must
                            * be a parrot op.
                            */
@@ -3022,7 +3025,7 @@
     break;
 
   case 143:
-#line 985 "pir.y"
+#line 988 "pir.y"
     {
                          /* the "instruction" that was set now appears to be
                           * an identifier; get the name, and check its type.
@@ -3059,22 +3062,22 @@
     break;
 
   case 144:
-#line 1021 "pir.y"
+#line 1024 "pir.y"
     { push_operand(lexer, (yyvsp[(1) - (1)].expr)); ;}
     break;
 
   case 145:
-#line 1026 "pir.y"
+#line 1029 "pir.y"
     { push_operand(lexer, expr_from_key(lexer, (yyvsp[(1) - (1)].key))); ;}
     break;
 
   case 146:
-#line 1030 "pir.y"
+#line 1033 "pir.y"
     { (yyval.expr) = expr_from_const(lexer, (yyvsp[(1) - (1)].cval)); ;}
     break;
 
   case 147:
-#line 1032 "pir.y"
+#line 1035 "pir.y"
     { /* this is either a LABEL or a symbol; in the latter case, the type
                             * will be filled in later. */
                            (yyval.expr) = expr_from_ident(lexer, (yyvsp[(1) - (1)].sval));
@@ -3082,17 +3085,17 @@
     break;
 
   case 148:
-#line 1037 "pir.y"
+#line 1040 "pir.y"
     { (yyval.expr) = expr_from_target(lexer, (yyvsp[(1) - (1)].targ)); ;}
     break;
 
   case 149:
-#line 1039 "pir.y"
+#line 1042 "pir.y"
     { (yyval.expr) = expr_from_target(lexer, (yyvsp[(1) - (1)].targ)); ;}
     break;
 
   case 150:
-#line 1043 "pir.y"
+#line 1046 "pir.y"
     {
                            /* if $1 is a register, just return that */
                            if (TEST_FLAG((yyvsp[(1) - (2)].targ)->flags, TARGET_FLAG_IS_REG))
@@ -3116,22 +3119,22 @@
     break;
 
   case 151:
-#line 1066 "pir.y"
+#line 1069 "pir.y"
     { (yyval.key) = (yyvsp[(2) - (3)].key); ;}
     break;
 
   case 152:
-#line 1070 "pir.y"
+#line 1073 "pir.y"
     { (yyval.key) = new_key(lexer, (yyvsp[(1) - (1)].expr)); ;}
     break;
 
   case 153:
-#line 1072 "pir.y"
+#line 1075 "pir.y"
     { (yyval.key) = add_key(lexer, (yyvsp[(1) - (3)].key), (yyvsp[(3) - (3)].expr)); ;}
     break;
 
   case 154:
-#line 1081 "pir.y"
+#line 1084 "pir.y"
     {
                           /* the instruction is already set in parrot_op rule */
                           unshift_operand(lexer, (yyvsp[(4) - (6)].expr));
@@ -3145,7 +3148,7 @@
     break;
 
   case 155:
-#line 1092 "pir.y"
+#line 1095 "pir.y"
     {
                           /* the instruction is already set in parrot_op rule */
                           unshift_operand(lexer, (yyvsp[(4) - (4)].expr));
@@ -3160,7 +3163,7 @@
     break;
 
   case 156:
-#line 1104 "pir.y"
+#line 1107 "pir.y"
     { /* XXX create a PMC const for $4 */
                           unshift_operand(lexer, expr_from_key(lexer, (yyvsp[(4) - (6)].key)));
                           unshift_operand(lexer, expr_from_target(lexer, (yyvsp[(1) - (6)].targ)));
@@ -3171,7 +3174,7 @@
     break;
 
   case 160:
-#line 1121 "pir.y"
+#line 1124 "pir.y"
     {
                           if ((yyvsp[(3) - (3)].ival) == 0)
                               set_instrf(lexer, "null", "%T", (yyvsp[(1) - (3)].targ));
@@ -3183,7 +3186,7 @@
     break;
 
   case 161:
-#line 1130 "pir.y"
+#line 1133 "pir.y"
     {
                           if ((yyvsp[(3) - (3)].dval) == 0.0)
                               set_instrf(lexer, "null", "%T", (yyvsp[(1) - (3)].targ));
@@ -3195,7 +3198,7 @@
     break;
 
   case 162:
-#line 1139 "pir.y"
+#line 1142 "pir.y"
     {
                           set_instrf(lexer, "set", "%T%s", (yyvsp[(1) - (3)].targ), (yyvsp[(3) - (3)].sval));
                           get_opinfo(yyscanner);
@@ -3203,7 +3206,7 @@
     break;
 
   case 163:
-#line 1144 "pir.y"
+#line 1147 "pir.y"
     {
                           set_instrf(lexer, "set", "%T%T", (yyvsp[(1) - (3)].targ), (yyvsp[(3) - (3)].targ));
                           get_opinfo(yyscanner);
@@ -3211,7 +3214,7 @@
     break;
 
   case 164:
-#line 1149 "pir.y"
+#line 1152 "pir.y"
     {
                           symbol *sym = find_symbol(lexer, (yyvsp[(3) - (3)].sval));
                           if (sym) {
@@ -3235,7 +3238,7 @@
     break;
 
   case 165:
-#line 1170 "pir.y"
+#line 1173 "pir.y"
     {
                           unshift_operand(lexer, expr_from_target(lexer, (yyvsp[(1) - (3)].targ)));
                           get_opinfo(yyscanner);
@@ -3243,7 +3246,7 @@
     break;
 
   case 166:
-#line 1175 "pir.y"
+#line 1178 "pir.y"
     {
                           /*   $P0 = foo ["bar"]
                            *
@@ -3287,7 +3290,7 @@
     break;
 
   case 167:
-#line 1216 "pir.y"
+#line 1219 "pir.y"
     {
                           symbol *sym = find_symbol(lexer, (yyvsp[(3) - (4)].sval));
                           target *t;
@@ -3308,7 +3311,7 @@
     break;
 
   case 168:
-#line 1234 "pir.y"
+#line 1237 "pir.y"
     {
                           target *preg = new_reg(lexer, PMC_TYPE, (yyvsp[(3) - (4)].ival));
                           set_target_key(preg, (yyvsp[(4) - (4)].key));
@@ -3318,7 +3321,7 @@
     break;
 
   case 169:
-#line 1241 "pir.y"
+#line 1244 "pir.y"
     {
                           set_instrf(lexer, opnames[(yyvsp[(2) - (3)].ival)], "%T%E", (yyvsp[(1) - (3)].targ), (yyvsp[(3) - (3)].expr));
                           get_opinfo(yyscanner);
@@ -3326,7 +3329,7 @@
     break;
 
   case 170:
-#line 1246 "pir.y"
+#line 1249 "pir.y"
     {
                           if ((yyvsp[(3) - (3)].ival) == 1)
                               set_instrf(lexer, "inc", "%T", (yyvsp[(1) - (3)].targ));
@@ -3340,7 +3343,7 @@
     break;
 
   case 171:
-#line 1257 "pir.y"
+#line 1260 "pir.y"
     {
                           if ((yyvsp[(3) - (3)].dval) == 1.0)
                               set_instrf(lexer, "inc", "%T", (yyvsp[(1) - (3)].targ));
@@ -3354,7 +3357,7 @@
     break;
 
   case 172:
-#line 1268 "pir.y"
+#line 1271 "pir.y"
     {
                           if ((yyvsp[(3) - (3)].ival) == 1)
                               set_instrf(lexer, "dec", "%T", (yyvsp[(1) - (3)].targ));
@@ -3368,7 +3371,7 @@
     break;
 
   case 173:
-#line 1279 "pir.y"
+#line 1282 "pir.y"
     {
                           if ((yyvsp[(3) - (3)].dval) == 1.0)
                               set_instrf(lexer, "dec", "%T", (yyvsp[(1) - (3)].targ));
@@ -3382,7 +3385,7 @@
     break;
 
   case 174:
-#line 1290 "pir.y"
+#line 1293 "pir.y"
     {
                           set_instrf(lexer, "add", "%T%T", (yyvsp[(1) - (3)].targ), (yyvsp[(3) - (3)].targ));
                           get_opinfo(yyscanner);
@@ -3390,7 +3393,7 @@
     break;
 
   case 175:
-#line 1295 "pir.y"
+#line 1298 "pir.y"
     {
                           set_instrf(lexer, "sub", "%T%T", (yyvsp[(1) - (3)].targ), (yyvsp[(3) - (3)].targ));
                           get_opinfo(yyscanner);
@@ -3398,7 +3401,7 @@
     break;
 
   case 176:
-#line 1300 "pir.y"
+#line 1303 "pir.y"
     {
                           set_instrf(lexer, (yyvsp[(3) - (4)].sval), "%T%E", (yyvsp[(1) - (4)].targ), (yyvsp[(4) - (4)].expr));
                           get_opinfo(yyscanner);
@@ -3406,7 +3409,7 @@
     break;
 
   case 177:
-#line 1305 "pir.y"
+#line 1308 "pir.y"
     {
                           if (targets_equal((yyvsp[(1) - (5)].targ), (yyvsp[(3) - (5)].targ))) /* $P0 = $P0 + $P1 ==> $P0 += $P1 */
                               set_instrf(lexer, opnames[(yyvsp[(4) - (5)].ival)], "%T%E", (yyvsp[(1) - (5)].targ), (yyvsp[(5) - (5)].expr));
@@ -3419,7 +3422,7 @@
     break;
 
   case 178:
-#line 1315 "pir.y"
+#line 1318 "pir.y"
     {
                           symbol *sym = find_symbol(lexer, (yyvsp[(1) - (4)].sval));
                           target *t;
@@ -3441,7 +3444,7 @@
     break;
 
   case 179:
-#line 1334 "pir.y"
+#line 1337 "pir.y"
     {
                           target *preg = new_reg(lexer, PMC_TYPE, (yyvsp[(1) - (4)].ival));
                           set_target_key(preg, (yyvsp[(2) - (4)].key));
@@ -3451,97 +3454,97 @@
     break;
 
   case 180:
-#line 1368 "pir.y"
+#line 1371 "pir.y"
     { set_instrf(lexer, opnames[(yyvsp[(2) - (3)].ival)], "%i%T", (yyvsp[(1) - (3)].ival), (yyvsp[(3) - (3)].targ)); ;}
     break;
 
   case 181:
-#line 1370 "pir.y"
+#line 1373 "pir.y"
     { set_instrf(lexer, opnames[(yyvsp[(2) - (3)].ival)], "%n%T", (yyvsp[(1) - (3)].dval), (yyvsp[(3) - (3)].targ)); ;}
     break;
 
   case 182:
-#line 1372 "pir.y"
+#line 1375 "pir.y"
     { set_instrf(lexer, opnames[(yyvsp[(2) - (3)].ival)], "%s%T", (yyvsp[(1) - (3)].sval), (yyvsp[(3) - (3)].targ)); ;}
     break;
 
   case 183:
-#line 1374 "pir.y"
+#line 1377 "pir.y"
     { set_instrf(lexer, "set", "%C", fold_s_s(yyscanner, (yyvsp[(1) - (3)].sval), (yyvsp[(2) - (3)].ival), (yyvsp[(3) - (3)].sval))); ;}
     break;
 
   case 184:
-#line 1376 "pir.y"
+#line 1379 "pir.y"
     { set_instrf(lexer, "set", "%C", fold_i_i(yyscanner, (yyvsp[(1) - (3)].ival), (yyvsp[(2) - (3)].ival), (yyvsp[(3) - (3)].ival))); ;}
     break;
 
   case 185:
-#line 1378 "pir.y"
+#line 1381 "pir.y"
     { set_instrf(lexer, "set", "%C", fold_n_n(yyscanner, (yyvsp[(1) - (3)].dval), (yyvsp[(2) - (3)].ival), (yyvsp[(3) - (3)].dval))); ;}
     break;
 
   case 186:
-#line 1380 "pir.y"
+#line 1383 "pir.y"
     { set_instrf(lexer, "set", "%C", fold_i_n(yyscanner, (yyvsp[(1) - (3)].ival), (yyvsp[(2) - (3)].ival), (yyvsp[(3) - (3)].dval))); ;}
     break;
 
   case 187:
-#line 1382 "pir.y"
+#line 1385 "pir.y"
     { set_instrf(lexer, "set", "%C", fold_n_i(yyscanner, (yyvsp[(1) - (3)].dval), (yyvsp[(2) - (3)].ival), (yyvsp[(3) - (3)].ival))); ;}
     break;
 
   case 188:
-#line 1387 "pir.y"
+#line 1390 "pir.y"
     { get_opinfo(yyscanner); ;}
     break;
 
   case 189:
-#line 1396 "pir.y"
+#line 1399 "pir.y"
     { create_if_instr(yyscanner, lexer, (yyvsp[(1) - (5)].ival), 1, (yyvsp[(3) - (5)].sval), (yyvsp[(5) - (5)].sval)); ;}
     break;
 
   case 190:
-#line 1398 "pir.y"
+#line 1401 "pir.y"
     { create_if_instr(yyscanner, lexer, (yyvsp[(1) - (5)].ival), 1, "int", (yyvsp[(5) - (5)].sval)); ;}
     break;
 
   case 191:
-#line 1400 "pir.y"
+#line 1403 "pir.y"
     { create_if_instr(yyscanner, lexer, (yyvsp[(1) - (5)].ival), 1, "num", (yyvsp[(5) - (5)].sval)); ;}
     break;
 
   case 192:
-#line 1402 "pir.y"
+#line 1405 "pir.y"
     { create_if_instr(yyscanner, lexer, (yyvsp[(1) - (5)].ival), 1, "pmc", (yyvsp[(5) - (5)].sval)); ;}
     break;
 
   case 193:
-#line 1404 "pir.y"
+#line 1407 "pir.y"
     { create_if_instr(yyscanner, lexer, (yyvsp[(1) - (5)].ival), 1, "string", (yyvsp[(5) - (5)].sval)); ;}
     break;
 
   case 194:
-#line 1406 "pir.y"
+#line 1409 "pir.y"
     { create_if_instr(yyscanner, lexer, (yyvsp[(1) - (5)].ival), 1, "if", (yyvsp[(5) - (5)].sval)); ;}
     break;
 
   case 195:
-#line 1408 "pir.y"
+#line 1411 "pir.y"
     { create_if_instr(yyscanner, lexer, (yyvsp[(1) - (5)].ival), 1, "unless", (yyvsp[(5) - (5)].sval)); ;}
     break;
 
   case 196:
-#line 1410 "pir.y"
+#line 1413 "pir.y"
     { create_if_instr(yyscanner, lexer, (yyvsp[(1) - (5)].ival), 1, "goto", (yyvsp[(5) - (5)].sval)); ;}
     break;
 
   case 197:
-#line 1412 "pir.y"
+#line 1415 "pir.y"
     { create_if_instr(yyscanner, lexer, (yyvsp[(1) - (5)].ival), 1, "null", (yyvsp[(5) - (5)].sval)); ;}
     break;
 
   case 198:
-#line 1414 "pir.y"
+#line 1417 "pir.y"
     {
                           int istrue = evaluate_c(lexer, (yyvsp[(2) - (4)].cval));
                           /* if "unless", invert the true-ness */
@@ -3556,7 +3559,7 @@
     break;
 
   case 199:
-#line 1426 "pir.y"
+#line 1429 "pir.y"
     {
                           set_instrf(lexer, (yyvsp[(1) - (5)].ival) ? "unless_null" : "if_null", "%T%I",
                                      new_reg(lexer, PMC_TYPE, (yyvsp[(3) - (5)].ival)), (yyvsp[(5) - (5)].sval));
@@ -3564,67 +3567,67 @@
     break;
 
   case 200:
-#line 1431 "pir.y"
+#line 1434 "pir.y"
     { create_if_instr(yyscanner, lexer, (yyvsp[(1) - (4)].ival), 0, (yyvsp[(2) - (4)].sval), (yyvsp[(4) - (4)].sval)); ;}
     break;
 
   case 201:
-#line 1433 "pir.y"
+#line 1436 "pir.y"
     { set_instrf(lexer, (yyvsp[(1) - (4)].ival) ? "unless" : "if", "%T%I", (yyvsp[(2) - (4)].targ), (yyvsp[(4) - (4)].sval)); ;}
     break;
 
   case 202:
-#line 1435 "pir.y"
+#line 1438 "pir.y"
     { create_if_instr(yyscanner, lexer, (yyvsp[(1) - (4)].ival), 0, "int", (yyvsp[(4) - (4)].sval)); ;}
     break;
 
   case 203:
-#line 1437 "pir.y"
+#line 1440 "pir.y"
     { create_if_instr(yyscanner, lexer, (yyvsp[(1) - (4)].ival), 0, "num", (yyvsp[(4) - (4)].sval)); ;}
     break;
 
   case 204:
-#line 1439 "pir.y"
+#line 1442 "pir.y"
     { create_if_instr(yyscanner, lexer, (yyvsp[(1) - (4)].ival), 0, "pmc", (yyvsp[(4) - (4)].sval)); ;}
     break;
 
   case 205:
-#line 1441 "pir.y"
+#line 1444 "pir.y"
     { create_if_instr(yyscanner, lexer, (yyvsp[(1) - (4)].ival), 0, "string", (yyvsp[(4) - (4)].sval)); ;}
     break;
 
   case 206:
-#line 1443 "pir.y"
+#line 1446 "pir.y"
     { create_if_instr(yyscanner, lexer, (yyvsp[(1) - (4)].ival), 0, "if", (yyvsp[(4) - (4)].sval)); ;}
     break;
 
   case 207:
-#line 1445 "pir.y"
+#line 1448 "pir.y"
     { create_if_instr(yyscanner, lexer, (yyvsp[(1) - (4)].ival), 0, "unless", (yyvsp[(4) - (4)].sval)); ;}
     break;
 
   case 208:
-#line 1447 "pir.y"
+#line 1450 "pir.y"
     { create_if_instr(yyscanner, lexer, (yyvsp[(1) - (4)].ival), 0, "goto", (yyvsp[(4) - (4)].sval)); ;}
     break;
 
   case 209:
-#line 1449 "pir.y"
+#line 1452 "pir.y"
     { create_if_instr(yyscanner, lexer, (yyvsp[(1) - (4)].ival), 0, "goto", (yyvsp[(4) - (4)].sval)); ;}
     break;
 
   case 210:
-#line 1451 "pir.y"
+#line 1454 "pir.y"
     { create_if_instr(yyscanner, lexer, (yyvsp[(1) - (4)].ival), 0, "null", (yyvsp[(4) - (4)].sval)); ;}
     break;
 
   case 211:
-#line 1453 "pir.y"
+#line 1456 "pir.y"
     { create_if_instr(yyscanner, lexer, (yyvsp[(1) - (4)].ival), 0, "null", (yyvsp[(4) - (4)].sval)); ;}
     break;
 
   case 212:
-#line 1455 "pir.y"
+#line 1458 "pir.y"
     {
                           if ((yyvsp[(2) - (4)].ival) == COMPUTE_DURING_RUNTIME) {
                              if ((yyvsp[(1) - (4)].ival) == NEED_INVERT_OPNAME) /* "unless" */
@@ -3652,7 +3655,7 @@
     break;
 
   case 213:
-#line 1486 "pir.y"
+#line 1489 "pir.y"
     {
                           /* the instructions "gt" and "ge" are converted to "lt" and "le".
                            * if so, then the arguments must be reversed as well. "lt" and
@@ -3681,7 +3684,7 @@
     break;
 
   case 214:
-#line 1512 "pir.y"
+#line 1515 "pir.y"
     {
                           if (((yyvsp[(0) - (3)].ival) != NEED_INVERT_OPNAME) && ((yyvsp[(2) - (3)].ival) == OP_GE || (yyvsp[(2) - (3)].ival) == OP_GT))
                               set_instrf(lexer, opnames[(yyvsp[(2) - (3)].ival) + 1], "%T%i", (yyvsp[(3) - (3)].targ), (yyvsp[(1) - (3)].ival));
@@ -3692,7 +3695,7 @@
     break;
 
   case 215:
-#line 1520 "pir.y"
+#line 1523 "pir.y"
     {
                           if (((yyvsp[(0) - (3)].ival) != NEED_INVERT_OPNAME) && ((yyvsp[(2) - (3)].ival) == OP_GE || (yyvsp[(2) - (3)].ival) == OP_GT))
                               set_instrf(lexer, opnames[(yyvsp[(2) - (3)].ival) + 1], "%T%n", (yyvsp[(3) - (3)].targ), (yyvsp[(1) - (3)].dval));
@@ -3704,7 +3707,7 @@
     break;
 
   case 216:
-#line 1529 "pir.y"
+#line 1532 "pir.y"
     {
                           if (((yyvsp[(0) - (3)].ival) != NEED_INVERT_OPNAME) && ((yyvsp[(2) - (3)].ival) == OP_GE || (yyvsp[(2) - (3)].ival) == OP_GT))
                               set_instrf(lexer, opnames[(yyvsp[(2) - (3)].ival)], "%T%s", (yyvsp[(3) - (3)].targ), (yyvsp[(1) - (3)].sval));
@@ -3716,32 +3719,32 @@
     break;
 
   case 217:
-#line 1538 "pir.y"
+#line 1541 "pir.y"
     { (yyval.ival) = evaluate_i_i((yyvsp[(1) - (3)].ival), (yyvsp[(2) - (3)].ival), (yyvsp[(3) - (3)].ival)); ;}
     break;
 
   case 218:
-#line 1540 "pir.y"
+#line 1543 "pir.y"
     { (yyval.ival) = evaluate_i_n((yyvsp[(1) - (3)].ival), (yyvsp[(2) - (3)].ival), (yyvsp[(3) - (3)].dval)); ;}
     break;
 
   case 219:
-#line 1542 "pir.y"
+#line 1545 "pir.y"
     { (yyval.ival) = evaluate_n_i((yyvsp[(1) - (3)].dval), (yyvsp[(2) - (3)].ival), (yyvsp[(3) - (3)].ival)); ;}
     break;
 
   case 220:
-#line 1544 "pir.y"
+#line 1547 "pir.y"
     { (yyval.ival) = evaluate_n_n((yyvsp[(1) - (3)].dval), (yyvsp[(2) - (3)].ival), (yyvsp[(3) - (3)].dval)); ;}
     break;
 
   case 221:
-#line 1546 "pir.y"
+#line 1549 "pir.y"
     { (yyval.ival) = evaluate_s_s((yyvsp[(1) - (3)].sval), (yyvsp[(2) - (3)].ival), (yyvsp[(3) - (3)].sval)); ;}
     break;
 
   case 222:
-#line 1550 "pir.y"
+#line 1553 "pir.y"
     {
                           yypirerror(yyscanner, lexer, "cannot compare string to %s",
                                      (yyvsp[(3) - (3)].ival) == INT_TYPE ? "integer" : "number");
@@ -3749,37 +3752,37 @@
     break;
 
   case 223:
-#line 1555 "pir.y"
+#line 1558 "pir.y"
     { yypirerror(yyscanner, lexer, "cannot compare integer to string"); ;}
     break;
 
   case 224:
-#line 1557 "pir.y"
+#line 1560 "pir.y"
     { yypirerror(yyscanner, lexer, "cannot compare number to string"); ;}
     break;
 
   case 225:
-#line 1561 "pir.y"
+#line 1564 "pir.y"
     { (yyval.ival) = INT_TYPE; ;}
     break;
 
   case 226:
-#line 1562 "pir.y"
+#line 1565 "pir.y"
     { (yyval.ival) = NUM_TYPE; ;}
     break;
 
   case 227:
-#line 1565 "pir.y"
+#line 1568 "pir.y"
     { (yyval.ival) = DONT_INVERT_OPNAME; /* no need to invert */ ;}
     break;
 
   case 228:
-#line 1566 "pir.y"
+#line 1569 "pir.y"
     { (yyval.ival) = NEED_INVERT_OPNAME; /* yes, invert opname */ ;}
     break;
 
   case 231:
-#line 1574 "pir.y"
+#line 1577 "pir.y"
     {
                           set_instrf(lexer, "branch", "%I", (yyvsp[(2) - (3)].sval));
                           set_op_labelflag(lexer, BIT(0)); /* bit 0 means: "1 << 0" */
@@ -3788,37 +3791,37 @@
     break;
 
   case 232:
-#line 1582 "pir.y"
+#line 1585 "pir.y"
     { declare_local(lexer, (yyvsp[(2) - (4)].ival), (yyvsp[(3) - (4)].symb)); ;}
     break;
 
   case 233:
-#line 1586 "pir.y"
+#line 1589 "pir.y"
     { (yyval.symb) = (yyvsp[(1) - (1)].symb); ;}
     break;
 
   case 234:
-#line 1588 "pir.y"
+#line 1591 "pir.y"
     { (yyval.symb) = add_local((yyvsp[(1) - (3)].symb), (yyvsp[(3) - (3)].symb)); ;}
     break;
 
   case 235:
-#line 1592 "pir.y"
+#line 1595 "pir.y"
     { (yyval.symb) = new_local(lexer, (yyvsp[(1) - (2)].sval), (yyvsp[(2) - (2)].ival)); ;}
     break;
 
   case 236:
-#line 1595 "pir.y"
+#line 1598 "pir.y"
     { (yyval.ival) = 0; ;}
     break;
 
   case 237:
-#line 1596 "pir.y"
+#line 1599 "pir.y"
     { (yyval.ival) = 1; ;}
     break;
 
   case 238:
-#line 1600 "pir.y"
+#line 1603 "pir.y"
     { /* if $4 is not a register, it must be a declared symbol */
                           if (!TEST_FLAG((yyvsp[(4) - (5)].targ)->flags, TARGET_FLAG_IS_REG)) {
 
@@ -3831,12 +3834,12 @@
     break;
 
   case 239:
-#line 1615 "pir.y"
+#line 1618 "pir.y"
     { convert_inv_to_instr(lexer, (yyvsp[(1) - (1)].invo)); ;}
     break;
 
   case 242:
-#line 1627 "pir.y"
+#line 1630 "pir.y"
     { /* $4 contains an invocation object */
                               set_invocation_args((yyvsp[(4) - (8)].invo), (yyvsp[(3) - (8)].argm));
                               (yyval.invo) = set_invocation_results((yyvsp[(4) - (8)].invo), (yyvsp[(6) - (8)].targ));
@@ -3844,72 +3847,72 @@
     break;
 
   case 243:
-#line 1634 "pir.y"
+#line 1637 "pir.y"
     { (yyval.argm) = NULL; ;}
     break;
 
   case 244:
-#line 1636 "pir.y"
+#line 1639 "pir.y"
     { (yyval.argm) = (yyvsp[(1) - (1)].argm); ;}
     break;
 
   case 245:
-#line 1640 "pir.y"
+#line 1643 "pir.y"
     { (yyval.argm) = (yyvsp[(1) - (1)].argm); ;}
     break;
 
   case 246:
-#line 1642 "pir.y"
+#line 1645 "pir.y"
     { (yyval.argm) = add_arg((yyvsp[(1) - (2)].argm), (yyvsp[(2) - (2)].argm)); ;}
     break;
 
   case 247:
-#line 1646 "pir.y"
+#line 1649 "pir.y"
     { (yyval.argm) = (yyvsp[(2) - (3)].argm); ;}
     break;
 
   case 248:
-#line 1650 "pir.y"
+#line 1653 "pir.y"
     { (yyval.invo) = invoke(lexer, CALL_PCC, (yyvsp[(2) - (3)].targ), (yyvsp[(3) - (3)].targ)); ;}
     break;
 
   case 249:
-#line 1652 "pir.y"
+#line 1655 "pir.y"
     { (yyval.invo) = invoke(lexer, CALL_NCI, (yyvsp[(2) - (2)].targ)); ;}
     break;
 
   case 250:
-#line 1655 "pir.y"
+#line 1658 "pir.y"
     { (yyval.invo) = invoke(lexer, CALL_METHOD, (yyvsp[(2) - (5)].targ), (yyvsp[(5) - (5)].expr)); ;}
     break;
 
   case 251:
-#line 1659 "pir.y"
+#line 1662 "pir.y"
     { (yyval.targ) = NULL; ;}
     break;
 
   case 252:
-#line 1661 "pir.y"
+#line 1664 "pir.y"
     { (yyval.targ) = (yyvsp[(2) - (2)].targ); ;}
     break;
 
   case 253:
-#line 1665 "pir.y"
+#line 1668 "pir.y"
     { (yyval.targ) = NULL; ;}
     break;
 
   case 254:
-#line 1667 "pir.y"
+#line 1670 "pir.y"
     { (yyval.targ) = (yyvsp[(1) - (1)].targ); ;}
     break;
 
   case 255:
-#line 1671 "pir.y"
+#line 1674 "pir.y"
     { (yyval.targ) = (yyvsp[(1) - (1)].targ); ;}
     break;
 
   case 256:
-#line 1673 "pir.y"
+#line 1676 "pir.y"
     {
                              if ((yyvsp[(2) - (2)].targ))
                                  (yyval.targ) = add_target(lexer, (yyvsp[(1) - (2)].targ), (yyvsp[(2) - (2)].targ));
@@ -3919,32 +3922,32 @@
     break;
 
   case 257:
-#line 1682 "pir.y"
+#line 1685 "pir.y"
     { (yyval.targ) = (yyvsp[(2) - (3)].targ); ;}
     break;
 
   case 258:
-#line 1684 "pir.y"
+#line 1687 "pir.y"
     { (yyval.targ) = NULL; ;}
     break;
 
   case 260:
-#line 1692 "pir.y"
+#line 1695 "pir.y"
     { (yyval.invo) = set_invocation_results((yyvsp[(3) - (3)].invo), (yyvsp[(1) - (3)].targ)); ;}
     break;
 
   case 261:
-#line 1694 "pir.y"
+#line 1697 "pir.y"
     { (yyval.invo) = set_invocation_results((yyvsp[(3) - (3)].invo), (yyvsp[(1) - (3)].targ)); ;}
     break;
 
   case 262:
-#line 1696 "pir.y"
+#line 1699 "pir.y"
     {  (yyval.invo) = set_invocation_results((yyvsp[(1) - (1)].invo), NULL); ;}
     break;
 
   case 265:
-#line 1704 "pir.y"
+#line 1707 "pir.y"
     {
                              /* if $1 is not a register, check whether the symbol was declared */
                              if (!TEST_FLAG((yyvsp[(1) - (4)].targ)->flags, TARGET_FLAG_IS_REG)) {
@@ -3965,7 +3968,7 @@
     break;
 
   case 266:
-#line 1724 "pir.y"
+#line 1727 "pir.y"
     {
                              (yyval.invo) = invoke(lexer, CALL_PCC, (yyvsp[(1) - (2)].targ), NULL);
                              set_invocation_args((yyval.invo), (yyvsp[(2) - (2)].argm));
@@ -3973,12 +3976,12 @@
     break;
 
   case 267:
-#line 1731 "pir.y"
+#line 1734 "pir.y"
     { (yyval.targ) = (yyvsp[(1) - (1)].targ); ;}
     break;
 
   case 268:
-#line 1733 "pir.y"
+#line 1736 "pir.y"
     {
                              symbol *sym = find_symbol(lexer, (yyvsp[(1) - (1)].sval));
                              if (sym == NULL)
@@ -3989,7 +3992,7 @@
     break;
 
   case 269:
-#line 1743 "pir.y"
+#line 1746 "pir.y"
     { /* check that this identifier was declared */
                              symbol *sym = find_symbol(lexer, (yyvsp[(1) - (1)].sval));
 
@@ -4009,22 +4012,22 @@
     break;
 
   case 270:
-#line 1760 "pir.y"
+#line 1763 "pir.y"
     { (yyval.expr) = expr_from_target(lexer, new_reg(lexer, PMC_TYPE, (yyvsp[(1) - (1)].ival))); ;}
     break;
 
   case 271:
-#line 1762 "pir.y"
+#line 1765 "pir.y"
     { (yyval.expr) = expr_from_target(lexer, new_reg(lexer, STRING_TYPE, (yyvsp[(1) - (1)].ival))); ;}
     break;
 
   case 272:
-#line 1764 "pir.y"
+#line 1767 "pir.y"
     { (yyval.expr) = expr_from_const(lexer, new_const(lexer, STRING_TYPE, (yyvsp[(1) - (1)].sval))); ;}
     break;
 
   case 273:
-#line 1768 "pir.y"
+#line 1771 "pir.y"
     {
                              symbol *sym = find_symbol(lexer, (yyvsp[(1) - (1)].sval));
                              if (sym == NULL)
@@ -4036,67 +4039,67 @@
     break;
 
   case 274:
-#line 1777 "pir.y"
+#line 1780 "pir.y"
     { (yyval.targ) = new_reg(lexer, PMC_TYPE, (yyvsp[(1) - (1)].ival)); ;}
     break;
 
   case 275:
-#line 1782 "pir.y"
+#line 1785 "pir.y"
     { (yyval.targ) = (yyvsp[(2) - (3)].targ); ;}
     break;
 
   case 276:
-#line 1786 "pir.y"
+#line 1789 "pir.y"
     { (yyval.targ) = NULL; ;}
     break;
 
   case 277:
-#line 1788 "pir.y"
+#line 1791 "pir.y"
     { (yyval.targ) = (yyvsp[(1) - (1)].targ); ;}
     break;
 
   case 278:
-#line 1792 "pir.y"
+#line 1795 "pir.y"
     { (yyval.targ) = (yyvsp[(1) - (1)].targ); ;}
     break;
 
   case 279:
-#line 1794 "pir.y"
+#line 1797 "pir.y"
     { (yyval.targ) = add_target(lexer, (yyvsp[(1) - (3)].targ), (yyvsp[(3) - (3)].targ)); ;}
     break;
 
   case 280:
-#line 1798 "pir.y"
+#line 1801 "pir.y"
     { (yyval.targ) = set_param_flag(lexer, (yyvsp[(1) - (2)].targ), (yyvsp[(2) - (2)].ival)); ;}
     break;
 
   case 281:
-#line 1802 "pir.y"
+#line 1805 "pir.y"
     { (yyval.ival) = 0; ;}
     break;
 
   case 282:
-#line 1804 "pir.y"
+#line 1807 "pir.y"
     { SET_FLAG((yyval.ival), (yyvsp[(2) - (2)].ival)); ;}
     break;
 
   case 283:
-#line 1808 "pir.y"
+#line 1811 "pir.y"
     { (yyval.ival) = TARGET_FLAG_OPTIONAL; ;}
     break;
 
   case 284:
-#line 1810 "pir.y"
+#line 1813 "pir.y"
     { (yyval.ival) = TARGET_FLAG_OPT_FLAG; ;}
     break;
 
   case 285:
-#line 1812 "pir.y"
+#line 1815 "pir.y"
     { (yyval.ival) = TARGET_FLAG_SLURPY; ;}
     break;
 
   case 286:
-#line 1814 "pir.y"
+#line 1817 "pir.y"
     {
                              (yyval.ival) = TARGET_FLAG_NAMED;
                              set_param_alias(lexer, (yyvsp[(2) - (2)].sval));
@@ -4104,12 +4107,12 @@
     break;
 
   case 287:
-#line 1824 "pir.y"
+#line 1827 "pir.y"
     { convert_inv_to_instr(lexer, (yyvsp[(1) - (1)].invo)); ;}
     break;
 
   case 292:
-#line 1834 "pir.y"
+#line 1837 "pir.y"
     {
                               (yyval.invo) = invoke(lexer, CALL_RETURN);
                               set_invocation_args((yyval.invo), (yyvsp[(2) - (3)].argm));
@@ -4117,7 +4120,7 @@
     break;
 
   case 293:
-#line 1839 "pir.y"
+#line 1842 "pir.y"
     { /* was the invocation a method call? then it becomes a method tail
                                * call, otherwise it's just a normal (sub) tail call.
                                */
@@ -4129,7 +4132,7 @@
     break;
 
   case 294:
-#line 1850 "pir.y"
+#line 1853 "pir.y"
     {
                               (yyval.invo) = invoke(lexer, CALL_YIELD);
                               set_invocation_args((yyval.invo), (yyvsp[(2) - (3)].argm));
@@ -4137,47 +4140,47 @@
     break;
 
   case 295:
-#line 1857 "pir.y"
+#line 1860 "pir.y"
     { (yyval.argm) = (yyvsp[(2) - (3)].argm); ;}
     break;
 
   case 296:
-#line 1861 "pir.y"
+#line 1864 "pir.y"
     { (yyval.argm) = NULL; ;}
     break;
 
   case 297:
-#line 1863 "pir.y"
+#line 1866 "pir.y"
     { (yyval.argm) = (yyvsp[(1) - (1)].argm); ;}
     break;
 
   case 298:
-#line 1867 "pir.y"
+#line 1870 "pir.y"
     { (yyval.argm) = (yyvsp[(1) - (1)].argm); ;}
     break;
 
   case 299:
-#line 1869 "pir.y"
+#line 1872 "pir.y"
     { (yyval.argm) = add_arg((yyvsp[(1) - (3)].argm), (yyvsp[(3) - (3)].argm)); ;}
     break;
 
   case 302:
-#line 1877 "pir.y"
+#line 1880 "pir.y"
     { (yyval.argm) = set_arg_alias(lexer, (yyvsp[(1) - (3)].sval)); ;}
     break;
 
   case 303:
-#line 1881 "pir.y"
+#line 1884 "pir.y"
     { (yyval.argm) = set_arg_flag((yyval.argm), (yyvsp[(2) - (2)].ival)); ;}
     break;
 
   case 304:
-#line 1885 "pir.y"
+#line 1888 "pir.y"
     { (yyval.argm) = set_curarg(lexer, new_argument(lexer, (yyvsp[(1) - (1)].expr)));  ;}
     break;
 
   case 305:
-#line 1891 "pir.y"
+#line 1894 "pir.y"
     {
                               (yyval.invo) = invoke(lexer, CALL_RETURN);
                               set_invocation_args((yyval.invo), (yyvsp[(3) - (5)].argm));
@@ -4185,7 +4188,7 @@
     break;
 
   case 306:
-#line 1900 "pir.y"
+#line 1903 "pir.y"
     {
                               (yyval.invo) = invoke(lexer, CALL_YIELD);
                               set_invocation_args((yyval.invo), (yyvsp[(3) - (5)].argm));
@@ -4193,72 +4196,72 @@
     break;
 
   case 307:
-#line 1907 "pir.y"
+#line 1910 "pir.y"
     { (yyval.argm) = NULL; ;}
     break;
 
   case 308:
-#line 1909 "pir.y"
+#line 1912 "pir.y"
     { (yyval.argm) = (yyvsp[(1) - (1)].argm); ;}
     break;
 
   case 309:
-#line 1914 "pir.y"
+#line 1917 "pir.y"
     { (yyval.argm) = (yyvsp[(1) - (1)].argm); ;}
     break;
 
   case 310:
-#line 1916 "pir.y"
+#line 1919 "pir.y"
     { (yyval.argm) = add_arg((yyvsp[(1) - (2)].argm), (yyvsp[(2) - (2)].argm)); ;}
     break;
 
   case 311:
-#line 1921 "pir.y"
+#line 1924 "pir.y"
     { (yyval.argm) = (yyvsp[(2) - (3)].argm); ;}
     break;
 
   case 312:
-#line 1925 "pir.y"
+#line 1928 "pir.y"
     { (yyval.argm) = NULL; ;}
     break;
 
   case 313:
-#line 1927 "pir.y"
+#line 1930 "pir.y"
     { (yyval.argm) = (yyvsp[(1) - (1)].argm); ;}
     break;
 
   case 314:
-#line 1931 "pir.y"
+#line 1934 "pir.y"
     { (yyval.argm) = (yyvsp[(1) - (1)].argm); ;}
     break;
 
   case 315:
-#line 1933 "pir.y"
+#line 1936 "pir.y"
     { (yyval.argm) = add_arg((yyvsp[(1) - (2)].argm), (yyvsp[(2) - (2)].argm)); ;}
     break;
 
   case 316:
-#line 1937 "pir.y"
+#line 1940 "pir.y"
     { (yyval.argm) = (yyvsp[(2) - (3)].argm); ;}
     break;
 
   case 317:
-#line 1942 "pir.y"
+#line 1945 "pir.y"
     { (yyval.ival) = 0; ;}
     break;
 
   case 318:
-#line 1944 "pir.y"
+#line 1947 "pir.y"
     { SET_FLAG((yyval.ival), (yyvsp[(2) - (2)].ival)); ;}
     break;
 
   case 319:
-#line 1948 "pir.y"
+#line 1951 "pir.y"
     { (yyval.ival) = ARG_FLAG_FLAT; ;}
     break;
 
   case 320:
-#line 1950 "pir.y"
+#line 1953 "pir.y"
     {
                                (yyval.ival) = ARG_FLAG_NAMED;
                                set_arg_alias(lexer, (yyvsp[(2) - (2)].sval));
@@ -4266,137 +4269,137 @@
     break;
 
   case 321:
-#line 1957 "pir.y"
+#line 1960 "pir.y"
     { (yyval.sval) = NULL; ;}
     break;
 
   case 322:
-#line 1959 "pir.y"
+#line 1962 "pir.y"
     { (yyval.sval) = (yyvsp[(1) - (1)].sval); ;}
     break;
 
   case 323:
-#line 1963 "pir.y"
+#line 1966 "pir.y"
     { (yyval.sval) = (yyvsp[(2) - (3)].sval); ;}
     break;
 
   case 327:
-#line 1974 "pir.y"
+#line 1977 "pir.y"
     { store_global_constant(lexer, (yyvsp[(2) - (2)].cval)); ;}
     break;
 
   case 328:
-#line 1978 "pir.y"
+#line 1981 "pir.y"
     { /* XXX is .globalconst to be kept? */ ;}
     break;
 
   case 329:
-#line 1982 "pir.y"
+#line 1985 "pir.y"
     { (yyval.cval) = new_named_const(lexer, INT_TYPE, (yyvsp[(2) - (4)].sval), (yyvsp[(4) - (4)].ival)); ;}
     break;
 
   case 330:
-#line 1984 "pir.y"
+#line 1987 "pir.y"
     { (yyval.cval) = new_named_const(lexer, NUM_TYPE, (yyvsp[(2) - (4)].sval), (yyvsp[(4) - (4)].dval)); ;}
     break;
 
   case 331:
-#line 1986 "pir.y"
+#line 1989 "pir.y"
     { (yyval.cval) = new_named_const(lexer, STRING_TYPE, (yyvsp[(2) - (4)].sval), (yyvsp[(4) - (4)].sval)); ;}
     break;
 
   case 332:
-#line 1988 "pir.y"
+#line 1991 "pir.y"
     { (yyval.cval) = new_pmc_const((yyvsp[(1) - (4)].sval), (yyvsp[(2) - (4)].sval), (yyvsp[(4) - (4)].cval)); ;}
     break;
 
   case 333:
-#line 1995 "pir.y"
+#line 1998 "pir.y"
     { (yyval.expr) = expr_from_target(lexer, (yyvsp[(1) - (1)].targ)); ;}
     break;
 
   case 334:
-#line 1996 "pir.y"
+#line 1999 "pir.y"
     { (yyval.expr) = expr_from_const(lexer, (yyvsp[(1) - (1)].cval)); ;}
     break;
 
   case 335:
-#line 2000 "pir.y"
+#line 2003 "pir.y"
     { (yyval.cval) = new_const(lexer, STRING_TYPE, (yyvsp[(1) - (1)].sval)); ;}
     break;
 
   case 336:
-#line 2001 "pir.y"
+#line 2004 "pir.y"
     { (yyval.cval) = new_const(lexer, INT_TYPE, (yyvsp[(1) - (1)].ival)); ;}
     break;
 
   case 337:
-#line 2002 "pir.y"
+#line 2005 "pir.y"
     { (yyval.cval) = new_const(lexer, NUM_TYPE, (yyvsp[(1) - (1)].dval)); ;}
     break;
 
   case 338:
-#line 2003 "pir.y"
+#line 2006 "pir.y"
     { (yyval.cval) = (yyvsp[(1) - (1)].cval); ;}
     break;
 
   case 339:
-#line 2006 "pir.y"
+#line 2009 "pir.y"
     { (yyval.ival) = OP_NE; ;}
     break;
 
   case 340:
-#line 2007 "pir.y"
+#line 2010 "pir.y"
     { (yyval.ival) = OP_EQ; ;}
     break;
 
   case 341:
-#line 2008 "pir.y"
+#line 2011 "pir.y"
     { (yyval.ival) = OP_LT; ;}
     break;
 
   case 342:
-#line 2009 "pir.y"
+#line 2012 "pir.y"
     { (yyval.ival) = OP_LE; ;}
     break;
 
   case 343:
-#line 2010 "pir.y"
+#line 2013 "pir.y"
     { (yyval.ival) = OP_GE; ;}
     break;
 
   case 344:
-#line 2011 "pir.y"
+#line 2014 "pir.y"
     { (yyval.ival) = OP_GT; ;}
     break;
 
   case 345:
-#line 2014 "pir.y"
+#line 2017 "pir.y"
     { (yyval.ival) = INT_TYPE; ;}
     break;
 
   case 346:
-#line 2015 "pir.y"
+#line 2018 "pir.y"
     { (yyval.ival) = NUM_TYPE; ;}
     break;
 
   case 347:
-#line 2016 "pir.y"
+#line 2019 "pir.y"
     { (yyval.ival) = PMC_TYPE; ;}
     break;
 
   case 348:
-#line 2017 "pir.y"
+#line 2020 "pir.y"
     { (yyval.ival) = STRING_TYPE; ;}
     break;
 
   case 349:
-#line 2025 "pir.y"
+#line 2028 "pir.y"
     { set_curtarget(lexer, (yyvsp[(1) - (1)].targ));  ;}
     break;
 
   case 351:
-#line 2029 "pir.y"
+#line 2032 "pir.y"
     { /* a symbol must have been declared; check that at this point. */
                            symbol * sym = find_symbol(lexer, (yyvsp[(1) - (1)].sval));
                            if (sym == NULL) {
@@ -4409,277 +4412,277 @@
     break;
 
   case 352:
-#line 2040 "pir.y"
+#line 2043 "pir.y"
     { (yyval.targ) = new_reg(lexer, PMC_TYPE, (yyvsp[(1) - (1)].ival));    ;}
     break;
 
   case 353:
-#line 2041 "pir.y"
+#line 2044 "pir.y"
     { (yyval.targ) = new_reg(lexer, NUM_TYPE, (yyvsp[(1) - (1)].ival));    ;}
     break;
 
   case 354:
-#line 2042 "pir.y"
+#line 2045 "pir.y"
     { (yyval.targ) = new_reg(lexer, INT_TYPE, (yyvsp[(1) - (1)].ival));    ;}
     break;
 
   case 355:
-#line 2043 "pir.y"
+#line 2046 "pir.y"
     { (yyval.targ) = new_reg(lexer, STRING_TYPE, (yyvsp[(1) - (1)].ival)); ;}
     break;
 
   case 358:
-#line 2051 "pir.y"
+#line 2054 "pir.y"
     { (yyval.sval) = "if"; ;}
     break;
 
   case 359:
-#line 2052 "pir.y"
+#line 2055 "pir.y"
     { (yyval.sval) = "unless"; ;}
     break;
 
   case 360:
-#line 2053 "pir.y"
+#line 2056 "pir.y"
     { (yyval.sval) = "goto"; ;}
     break;
 
   case 361:
-#line 2054 "pir.y"
+#line 2057 "pir.y"
     { (yyval.sval) = "int"; ;}
     break;
 
   case 362:
-#line 2055 "pir.y"
+#line 2058 "pir.y"
     { (yyval.sval) = "num"; ;}
     break;
 
   case 363:
-#line 2056 "pir.y"
+#line 2059 "pir.y"
     { (yyval.sval) = "string"; ;}
     break;
 
   case 364:
-#line 2057 "pir.y"
+#line 2060 "pir.y"
     { (yyval.sval) = "pmc"; ;}
     break;
 
   case 365:
-#line 2058 "pir.y"
+#line 2061 "pir.y"
     { (yyval.sval) = "null"; ;}
     break;
 
   case 366:
-#line 2061 "pir.y"
+#line 2064 "pir.y"
     { (yyval.sval) = "neg"; ;}
     break;
 
   case 367:
-#line 2062 "pir.y"
+#line 2065 "pir.y"
     { (yyval.sval) = "not"; ;}
     break;
 
   case 368:
-#line 2063 "pir.y"
+#line 2066 "pir.y"
     { (yyval.sval) = "bnot"; ;}
     break;
 
   case 369:
-#line 2066 "pir.y"
+#line 2069 "pir.y"
     { (yyval.ival) = OP_ADD; ;}
     break;
 
   case 370:
-#line 2067 "pir.y"
+#line 2070 "pir.y"
     { (yyval.ival) = OP_SUB; ;}
     break;
 
   case 371:
-#line 2068 "pir.y"
+#line 2071 "pir.y"
     { (yyval.ival) = OP_DIV; ;}
     break;
 
   case 372:
-#line 2069 "pir.y"
+#line 2072 "pir.y"
     { (yyval.ival) = OP_MUL; ;}
     break;
 
   case 373:
-#line 2070 "pir.y"
+#line 2073 "pir.y"
     { (yyval.ival) = OP_MOD; ;}
     break;
 
   case 374:
-#line 2071 "pir.y"
+#line 2074 "pir.y"
     { (yyval.ival) = OP_BOR; ;}
     break;
 
   case 375:
-#line 2072 "pir.y"
+#line 2075 "pir.y"
     { (yyval.ival) = OP_BAND; ;}
     break;
 
   case 376:
-#line 2073 "pir.y"
+#line 2076 "pir.y"
     { (yyval.ival) = OP_BXOR; ;}
     break;
 
   case 377:
-#line 2074 "pir.y"
+#line 2077 "pir.y"
     { (yyval.ival) = OP_POW; ;}
     break;
 
   case 378:
-#line 2075 "pir.y"
+#line 2078 "pir.y"
     { (yyval.ival) = OP_CONCAT; ;}
     break;
 
   case 379:
-#line 2076 "pir.y"
+#line 2079 "pir.y"
     { (yyval.ival) = OP_LSR; ;}
     break;
 
   case 380:
-#line 2077 "pir.y"
+#line 2080 "pir.y"
     { (yyval.ival) = OP_SHR; ;}
     break;
 
   case 381:
-#line 2078 "pir.y"
+#line 2081 "pir.y"
     { (yyval.ival) = OP_SHL; ;}
     break;
 
   case 382:
-#line 2079 "pir.y"
+#line 2082 "pir.y"
     { (yyval.ival) = OP_OR; ;}
     break;
 
   case 383:
-#line 2080 "pir.y"
+#line 2083 "pir.y"
     { (yyval.ival) = OP_AND; ;}
     break;
 
   case 384:
-#line 2081 "pir.y"
+#line 2084 "pir.y"
     { (yyval.ival) = OP_FDIV; ;}
     break;
 
   case 385:
-#line 2082 "pir.y"
+#line 2085 "pir.y"
     { (yyval.ival) = OP_XOR; ;}
     break;
 
   case 386:
-#line 2083 "pir.y"
+#line 2086 "pir.y"
     { (yyval.ival) = OP_ISEQ; ;}
     break;
 
   case 387:
-#line 2084 "pir.y"
+#line 2087 "pir.y"
     { (yyval.ival) = OP_ISLE; ;}
     break;
 
   case 388:
-#line 2085 "pir.y"
+#line 2088 "pir.y"
     { (yyval.ival) = OP_ISLT; ;}
     break;
 
   case 389:
-#line 2086 "pir.y"
+#line 2089 "pir.y"
     { (yyval.ival) = OP_ISGE; ;}
     break;
 
   case 390:
-#line 2087 "pir.y"
+#line 2090 "pir.y"
     { (yyval.ival) = OP_ISGT; ;}
     break;
 
   case 391:
-#line 2088 "pir.y"
+#line 2091 "pir.y"
     { (yyval.ival) = OP_ISNE; ;}
     break;
 
   case 392:
-#line 2094 "pir.y"
+#line 2097 "pir.y"
     { (yyval.ival) = OP_MUL; ;}
     break;
 
   case 393:
-#line 2095 "pir.y"
+#line 2098 "pir.y"
     { (yyval.ival) = OP_MOD; ;}
     break;
 
   case 394:
-#line 2096 "pir.y"
+#line 2099 "pir.y"
     { (yyval.ival) = OP_POW; ;}
     break;
 
   case 395:
-#line 2097 "pir.y"
+#line 2100 "pir.y"
     { (yyval.ival) = OP_DIV; ;}
     break;
 
   case 396:
-#line 2098 "pir.y"
+#line 2101 "pir.y"
     { (yyval.ival) = OP_FDIV; ;}
     break;
 
   case 397:
-#line 2099 "pir.y"
+#line 2102 "pir.y"
     { (yyval.ival) = OP_BOR; ;}
     break;
 
   case 398:
-#line 2100 "pir.y"
+#line 2103 "pir.y"
     { (yyval.ival) = OP_BAND; ;}
     break;
 
   case 399:
-#line 2101 "pir.y"
+#line 2104 "pir.y"
     { (yyval.ival) = OP_BXOR; ;}
     break;
 
   case 400:
-#line 2102 "pir.y"
+#line 2105 "pir.y"
     { (yyval.ival) = OP_CONCAT; ;}
     break;
 
   case 401:
-#line 2103 "pir.y"
+#line 2106 "pir.y"
     { (yyval.ival) = OP_SHR; ;}
     break;
 
   case 402:
-#line 2104 "pir.y"
+#line 2107 "pir.y"
     { (yyval.ival) = OP_SHL; ;}
     break;
 
   case 403:
-#line 2105 "pir.y"
+#line 2108 "pir.y"
     { (yyval.ival) = OP_LSR; ;}
     break;
 
   case 405:
-#line 2126 "pir.y"
+#line 2129 "pir.y"
     { new_subr(lexer, "@start"); ;}
     break;
 
   case 414:
-#line 2142 "pir.y"
+#line 2145 "pir.y"
     { set_label(lexer, (yyvsp[(1) - (2)].sval)); ;}
     break;
 
   case 419:
-#line 2152 "pir.y"
+#line 2155 "pir.y"
     { set_sub_name(lexer, (yyvsp[(3) - (3)].sval)); ;}
     break;
 
   case 420:
-#line 2156 "pir.y"
+#line 2159 "pir.y"
     { new_subr(lexer, NULL); ;}
     break;
 
   case 421:
-#line 2161 "pir.y"
+#line 2164 "pir.y"
     {
                                   if (is_parrot_op(lexer, (yyvsp[(1) - (3)].sval)))
                                       get_opinfo(yyscanner);
@@ -4691,7 +4694,7 @@
 
 
 /* Line 1267 of yacc.c.  */
-#line 4695 "pirparser.c"
+#line 4698 "pirparser.c"
       default: break;
     }
   YY_SYMBOL_PRINT ("-> $$ =", yyr1[yyn], &yyval, &yyloc);
@@ -4905,7 +4908,7 @@
 }
 
 
-#line 2172 "pir.y"
+#line 2175 "pir.y"
 
 
 



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