Fix loop initialization in table.foreach().

Reported by Daniel Steinberg.

src/host/buildvm_libbc.h

@@ -8,37 +8,37 @@ static const uint8_t libbc_code[] = {
 0,1,2,24,1,0,0,76,1,2,0,243,244,148,165,20,198,190,199,252,3,0,1,2,0,0,0,3,
 16,0,5,0,21,1,0,0,76,1,2,0,0,2,10,0,0,0,15,16,0,12,0,16,1,9,0,41,2,1,0,21,3,
 0,0,41,4,1,0,77,2,8,128,18,6,1,0,18,8,5,0,59,9,5,0,66,6,3,2,10,6,0,0,88,7,1,
-128,76,6,2,0,79,2,248,127,75,0,1,0,0,2,11,0,0,0,16,16,0,12,0,16,1,9,0,43,2,
-0,0,18,3,0,0,41,4,0,0,88,5,7,128,18,7,1,0,18,9,5,0,18,10,6,0,66,7,3,2,10,7,
-0,0,88,8,1,128,76,7,2,0,70,5,3,3,82,5,247,127,75,0,1,0,0,1,2,0,0,0,3,16,0,12,
-0,21,1,0,0,76,1,2,0,0,2,10,0,0,2,30,16,0,12,0,21,2,0,0,11,1,0,0,88,3,7,128,
-8,2,0,0,88,3,23,128,59,3,2,0,43,4,0,0,64,4,2,0,76,3,2,0,88,3,18,128,16,1,14,
-0,41,3,1,0,3,3,1,0,88,3,14,128,3,1,2,0,88,3,12,128,59,3,1,0,22,4,1,1,18,5,2,
-0,41,6,1,0,77,4,4,128,23,8,1,7,59,9,7,0,64,9,8,0,79,4,252,127,43,4,0,0,64,4,
-2,0,76,3,2,0,75,0,1,0,0,2,0,5,12,0,0,0,35,16,0,12,0,16,1,14,0,16,2,14,0,16,
-3,14,0,11,4,0,0,88,5,1,128,18,4,0,0,16,4,12,0,3,1,2,0,88,5,24,128,33,5,1,3,
-0,2,3,0,88,6,4,128,2,3,1,0,88,6,2,128,4,4,0,0,88,6,9,128,18,6,1,0,18,7,2,0,
-41,8,1,0,77,6,4,128,32,10,5,9,59,11,9,0,64,11,10,4,79,6,252,127,88,6,8,128,
-18,6,2,0,18,7,1,0,41,8,255,255,77,6,4,128,32,10,5,9,59,11,9,0,64,11,10,4,79,
-6,252,127,76,4,2,0,0
+128,76,6,2,0,79,2,248,127,75,0,1,0,0,2,11,0,0,1,16,16,0,12,0,16,1,9,0,43,2,
+0,0,18,3,0,0,42,4,0,0,88,5,7,128,18,7,1,0,18,9,5,0,18,10,6,0,66,7,3,2,10,7,
+0,0,88,8,1,128,76,7,2,0,70,5,3,3,82,5,247,127,75,0,1,0,1,255,255,249,255,15,
+0,1,2,0,0,0,3,16,0,12,0,21,1,0,0,76,1,2,0,0,2,10,0,0,2,30,16,0,12,0,21,2,0,
+0,11,1,0,0,88,3,7,128,8,2,0,0,88,3,23,128,59,3,2,0,43,4,0,0,64,4,2,0,76,3,2,
+0,88,3,18,128,16,1,14,0,41,3,1,0,3,3,1,0,88,3,14,128,3,1,2,0,88,3,12,128,59,
+3,1,0,22,4,1,1,18,5,2,0,41,6,1,0,77,4,4,128,23,8,1,7,59,9,7,0,64,9,8,0,79,4,
+252,127,43,4,0,0,64,4,2,0,76,3,2,0,75,0,1,0,0,2,0,5,12,0,0,0,35,16,0,12,0,16,
+1,14,0,16,2,14,0,16,3,14,0,11,4,0,0,88,5,1,128,18,4,0,0,16,4,12,0,3,1,2,0,88,
+5,24,128,33,5,1,3,0,2,3,0,88,6,4,128,2,3,1,0,88,6,2,128,4,4,0,0,88,6,9,128,
+18,6,1,0,18,7,2,0,41,8,1,0,77,6,4,128,32,10,5,9,59,11,9,0,64,11,10,4,79,6,252,
+127,88,6,8,128,18,6,2,0,18,7,1,0,41,8,255,255,77,6,4,128,32,10,5,9,59,11,9,
+0,64,11,10,4,79,6,252,127,76,4,2,0,0
 #else
 0,1,2,0,0,1,2,24,1,0,0,76,1,2,0,241,135,158,166,3,220,203,178,130,4,0,1,2,0,
 0,1,2,24,1,0,0,76,1,2,0,243,244,148,165,20,198,190,199,252,3,0,1,2,0,0,0,3,
 16,0,5,0,21,1,0,0,76,1,2,0,0,2,9,0,0,0,15,16,0,12,0,16,1,9,0,41,2,1,0,21,3,
 0,0,41,4,1,0,77,2,8,128,18,6,1,0,18,7,5,0,59,8,5,0,66,6,3,2,10,6,0,0,88,7,1,
-128,76,6,2,0,79,2,248,127,75,0,1,0,0,2,10,0,0,0,16,16,0,12,0,16,1,9,0,43,2,
-0,0,18,3,0,0,41,4,0,0,88,5,7,128,18,7,1,0,18,8,5,0,18,9,6,0,66,7,3,2,10,7,0,
-0,88,8,1,128,76,7,2,0,70,5,3,3,82,5,247,127,75,0,1,0,0,1,2,0,0,0,3,16,0,12,
-0,21,1,0,0,76,1,2,0,0,2,10,0,0,2,30,16,0,12,0,21,2,0,0,11,1,0,0,88,3,7,128,
-8,2,0,0,88,3,23,128,59,3,2,0,43,4,0,0,64,4,2,0,76,3,2,0,88,3,18,128,16,1,14,
-0,41,3,1,0,3,3,1,0,88,3,14,128,3,1,2,0,88,3,12,128,59,3,1,0,22,4,1,1,18,5,2,
-0,41,6,1,0,77,4,4,128,23,8,1,7,59,9,7,0,64,9,8,0,79,4,252,127,43,4,0,0,64,4,
-2,0,76,3,2,0,75,0,1,0,0,2,0,5,12,0,0,0,35,16,0,12,0,16,1,14,0,16,2,14,0,16,
-3,14,0,11,4,0,0,88,5,1,128,18,4,0,0,16,4,12,0,3,1,2,0,88,5,24,128,33,5,1,3,
-0,2,3,0,88,6,4,128,2,3,1,0,88,6,2,128,4,4,0,0,88,6,9,128,18,6,1,0,18,7,2,0,
-41,8,1,0,77,6,4,128,32,10,5,9,59,11,9,0,64,11,10,4,79,6,252,127,88,6,8,128,
-18,6,2,0,18,7,1,0,41,8,255,255,77,6,4,128,32,10,5,9,59,11,9,0,64,11,10,4,79,
-6,252,127,76,4,2,0,0
+128,76,6,2,0,79,2,248,127,75,0,1,0,0,2,10,0,0,1,16,16,0,12,0,16,1,9,0,43,2,
+0,0,18,3,0,0,42,4,0,0,88,5,7,128,18,7,1,0,18,8,5,0,18,9,6,0,66,7,3,2,10,7,0,
+0,88,8,1,128,76,7,2,0,70,5,3,3,82,5,247,127,75,0,1,0,1,255,255,249,255,15,0,
+1,2,0,0,0,3,16,0,12,0,21,1,0,0,76,1,2,0,0,2,10,0,0,2,30,16,0,12,0,21,2,0,0,
+11,1,0,0,88,3,7,128,8,2,0,0,88,3,23,128,59,3,2,0,43,4,0,0,64,4,2,0,76,3,2,0,
+88,3,18,128,16,1,14,0,41,3,1,0,3,3,1,0,88,3,14,128,3,1,2,0,88,3,12,128,59,3,
+1,0,22,4,1,1,18,5,2,0,41,6,1,0,77,4,4,128,23,8,1,7,59,9,7,0,64,9,8,0,79,4,252,
+127,43,4,0,0,64,4,2,0,76,3,2,0,75,0,1,0,0,2,0,5,12,0,0,0,35,16,0,12,0,16,1,
+14,0,16,2,14,0,16,3,14,0,11,4,0,0,88,5,1,128,18,4,0,0,16,4,12,0,3,1,2,0,88,
+5,24,128,33,5,1,3,0,2,3,0,88,6,4,128,2,3,1,0,88,6,2,128,4,4,0,0,88,6,9,128,
+18,6,1,0,18,7,2,0,41,8,1,0,77,6,4,128,32,10,5,9,59,11,9,0,64,11,10,4,79,6,252,
+127,88,6,8,128,18,6,2,0,18,7,1,0,41,8,255,255,77,6,4,128,32,10,5,9,59,11,9,
+0,64,11,10,4,79,6,252,127,76,4,2,0,0
 #endif
 };
 
@@ -48,9 +48,9 @@ static const struct { const char *name; int ofs; } libbc_map[] = {
 {"string_len",50},
 {"table_foreachi",69},
 {"table_foreach",136},
-{"table_getn",207},
-{"table_remove",226},
-{"table_move",355},
-{NULL,502}
+{"table_getn",213},
+{"table_remove",232},
+{"table_move",361},
+{NULL,508}
 };
 

src/host/genlibbc.lua

@@ -55,7 +55,7 @@ local function transform_lua(code)
   end)
   code = string.gsub(code, "PAIRS%((.-)%)", function(var)
     fixup.PAIRS = true
-    return format("nil, %s, 0", var)
+    return format("nil, %s, 0x4dp80", var)
   end)
   return "return "..code, fixup
 end
@@ -129,7 +129,10 @@ local function fixup_dump(dump, fixup)
     end
     p = p + 4
   end
-  return ffi.string(start, n)
+  local ndump = ffi.string(start, n)
+  -- Fixup hi-part of 0x4dp80 to LJ_KEYINDEX.
+  ndump = ndump:gsub("\x80\x80\xcd\xaa\x04", "\xff\xff\xf9\xff\x0f")
+  return ndump
 end
 
 local function find_defs(src)

src/lj_record.c

@@ -2233,6 +2233,7 @@ void lj_record_ins(jit_State *J)
   case BCMpri: setpriV(rcv, ~rc); ix.key = rc = TREF_PRI(IRT_NIL+rc); break;
   case BCMnum: { cTValue *tv = proto_knumtv(J->pt, rc);
     copyTV(J->L, rcv, tv); ix.key = rc = tvisint(tv) ? lj_ir_kint(J, intV(tv)) :
+    tv->u32.hi == LJ_KEYINDEX ? (lj_ir_kint(J, 0) | TREF_KEYINDEX) :
     lj_ir_knumint(J, numV(tv)); } break;
   case BCMstr: { GCstr *s = gco2str(proto_kgc(J->pt, ~(ptrdiff_t)rc));
     setstrV(J->L, rcv, s); ix.key = rc = lj_ir_kstr(J, s); } break;