commit 81fc3c4f45c0e2175dc96fc061e600bafb02bdc7
parent e7fb0d8a6f10338fe62e869115dfe9f3a73e2552
Author: Roberto Ierusalimschy <roberto@inf.puc-rio.br>
Date: Fri, 4 May 2007 15:41:26 -0300
bug: code generated for "-nil", "-true", and "-false" is wrong
Diffstat:
1 file changed, 7 insertions(+), 6 deletions(-)
diff --git a/lcode.c b/lcode.c
@@ -1,5 +1,5 @@
/*
-** $Id: lcode.c,v 2.32 2007/03/09 18:50:56 roberto Exp roberto $
+** $Id: lcode.c,v 2.33 2007/03/27 14:11:38 roberto Exp roberto $
** Code generator for Lua
** See Copyright Notice in lua.h
*/
@@ -647,8 +647,6 @@ static int constfolding (OpCode op, expdesc *e1, expdesc *e2) {
if (v2 == 0) return 0; /* do not attempt to divide by 0 */
r = luai_nummod(NULL, v1, v2); break;
case OP_POW: r = luai_numpow(NULL, v1, v2); break;
- case OP_UNM: r = luai_numunm(NULL, v1); break;
- case OP_LEN: return 0; /* no constant folding for 'len' */
default: lua_assert(0); r = 0; break;
}
if (luai_numisnan(NULL, r)) return 0; /* do not attempt to produce NaN */
@@ -698,9 +696,12 @@ void luaK_prefix (FuncState *fs, UnOpr op, expdesc *e) {
e2.t = e2.f = NO_JUMP; e2.k = VKNUM; e2.u.nval = 0;
switch (op) {
case OPR_MINUS: {
- if (e->k == VK)
- luaK_exp2anyreg(fs, e); /* cannot operate on non-numeric constants */
- codearith(fs, OP_UNM, e, &e2);
+ if (isnumeral(e)) /* -constant? */
+ e->u.nval = luai_numunm(NULL, e->u.nval);
+ else {
+ luaK_exp2anyreg(fs, e);
+ codearith(fs, OP_UNM, e, &e2);
+ }
break;
}
case OPR_NOT: codenot(fs, e); break;