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bug: problem with optimizations of short-circuit logic

This commit is contained in:
Roberto Ierusalimschy 2011-01-31 12:52:32 -02:00
parent 026a7e92be
commit a7faa557fa
1 changed files with 45 additions and 2 deletions
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47
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@ -1880,8 +1880,8 @@ patch = [[
+++ lundump.c 2008/04/04 19:51:41 2.7.1.4
@@ -1,5 +1,5 @@
/*
-** $Id: bugs,v 1.107 2010/04/19 18:04:58 roberto Exp roberto $
+** $Id: bugs,v 1.107 2010/04/19 18:04:58 roberto Exp roberto $
-** $Id: bugs,v 1.108 2010/05/14 15:34:57 roberto Exp roberto $
+** $Id: bugs,v 1.108 2010/05/14 15:34:57 roberto Exp roberto $
** load precompiled Lua chunks
** See Copyright Notice in lua.h
*/
@ -2316,3 +2316,46 @@ patch = [[
]]
}
Bug{
what = [[wrong code generation for some particular boolean expressions]],
report = [[Thierry Van Elsuwe, 2011/01/20]],
since = [[5.0]],
example = [[
print((('hi' or true) and true) or true)
--> hi (should be true)
print(((nil and nil) or false) and true)
--> nil (should be false)
]],
patch = [[
--- lcode.c 2009/06/15 14:12:25 2.25.1.4
+++ lcode.c 2011/01/31 14:44:25
@@ -549,13 +549,6 @@
pc = e->u.s.info;
break;
}
- case VFALSE: {
- if (!hasjumps(e)) {
- pc = luaK_jump(fs); /* always jump */
- break;
- }
- /* else go through */
- }
default: {
pc = jumponcond(fs, e, 0);
break;
@@ -579,13 +572,6 @@
pc = e->u.s.info;
break;
}
- case VTRUE: {
- if (!hasjumps(e)) {
- pc = luaK_jump(fs); /* always jump */
- break;
- }
- /* else go through */
- }
default: {
pc = jumponcond(fs, e, 1);
break;
]]
}