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new scheme to close upvalues in 'break'; jump instructions may

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do the close, avoiding the need for a OP_CLOSE instruction
This commit is contained in:
Roberto Ierusalimschy
2011-02-01 16:03:10 -02:00
parent f6bd8b1147
commit dd547c55c8
5 changed files with 41 additions and 21 deletions
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7
lopcodes.h
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@@ -1,5 +1,5 @@
/*
** $Id: lopcodes.h,v 1.136 2010/10/13 16:45:54 roberto Exp roberto $
** $Id: lopcodes.h,v 1.137 2010/10/25 12:24:55 roberto Exp roberto $
** Opcodes for Lua virtual machine
** See Copyright Notice in lua.h
*/
@@ -195,8 +195,7 @@ OP_LEN,/* A B R(A) := length of R(B) */
OP_CONCAT,/* A B C R(A) := R(B).. ... ..R(C) */
OP_JMP,/* sBx pc+=sBx */
OP_JMP,/* A sBx pc+=sBx; if (A) close all upvalues >= R(A) + 1 */
OP_EQ,/* A B C if ((RK(B) == RK(C)) ~= A) then pc++ */
OP_LT,/* A B C if ((RK(B) < RK(C)) ~= A) then pc++ */
OP_LE,/* A B C if ((RK(B) <= RK(C)) ~= A) then pc++ */
@@ -217,7 +216,7 @@ OP_TFORLOOP,/* A sBx if R(A+1) ~= nil then { R(A)=R(A+1); pc += sBx }*/
OP_SETLIST,/* A B C R(A)[(C-1)*FPF+i] := R(A+i), 1 <= i <= B */
OP_CLOSE,/* A close all variables in the stack up to (>=) R(A)*/
OP_CLOSE,/* A close all upvalues >= R(A) */
OP_CLOSURE,/* A Bx R(A) := closure(KPROTO[Bx]) */
OP_VARARG,/* A B R(A), R(A+1), ..., R(A+B-2) = vararg */