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Improve JSRESOLVE_DETECTING by treating 'terminal' uses of, e.g., document.all as detecting (248549, r=jst).

This commit is contained in:
brendan%mozilla.org 2004-07-15 18:53:59 +00:00
Родитель 1013461c42
Коммит c654a3f978
3 изменённых файлов: 12 добавлений и 11 удалений
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2
js/src/jsobj.c
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@ -2468,7 +2468,7 @@ js_LookupProperty(JSContext *cx, JSObject *obj, jsid id, JSObject **objp,
pc += cs->length;
while (*pc == JSOP_GROUP)
pc++;
if (*pc == JSOP_IFEQ)
if (js_CodeSpec[*pc].format & JOF_DETECTING)
flags |= JSRESOLVE_DETECTING;
}
}

1
js/src/jsopcode.h
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@ -89,6 +89,7 @@ typedef enum JSOp {
#define JOF_FOR 0x1000 /* for-in property op */
#define JOF_ASSIGNING JOF_SET /* hint for JSClass.resolve, used for ops
that do simplex assignment */
#define JOF_DETECTING 0x2000 /* object detection flag for JSNewResolveOp */
#define JOF_BACKPATCH 0x4000 /* backpatch placeholder during codegen */
#define JOF_LEFTASSOC 0x8000 /* left-associative operator */

20
js/src/jsopcode.tbl
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@ -76,7 +76,7 @@ OPDEF(JSOP_ENTERWITH, 3, "enterwith", NULL, 1, 1, 1, 0, JOF_BYTE)
OPDEF(JSOP_LEAVEWITH, 4, "leavewith", NULL, 1, 1, 0, 0, JOF_BYTE)
OPDEF(JSOP_RETURN, 5, "return", NULL, 1, 1, 0, 0, JOF_BYTE)
OPDEF(JSOP_GOTO, 6, "goto", NULL, 3, 0, 0, 0, JOF_JUMP)
OPDEF(JSOP_IFEQ, 7, "ifeq", NULL, 3, 1, 0, 0, JOF_JUMP)
OPDEF(JSOP_IFEQ, 7, "ifeq", NULL, 3, 1, 0, 0, JOF_JUMP|JOF_DETECTING)
OPDEF(JSOP_IFNE, 8, "ifne", NULL, 3, 1, 0, 0, JOF_JUMP)
/* Get the arguments object for the current, lightweight function activation. */
@ -107,7 +107,7 @@ OPDEF(JSOP_SUB, 28, "sub", "-", 1, 2, 1, 8, JOF_BYTE|J
OPDEF(JSOP_MUL, 29, "mul", "*", 1, 2, 1, 9, JOF_BYTE|JOF_LEFTASSOC)
OPDEF(JSOP_DIV, 30, "div", "/", 1, 2, 1, 9, JOF_BYTE|JOF_LEFTASSOC)
OPDEF(JSOP_MOD, 31, "mod", "%", 1, 2, 1, 9, JOF_BYTE|JOF_LEFTASSOC)
OPDEF(JSOP_NOT, 32, "not", "!", 1, 1, 1, 10, JOF_BYTE)
OPDEF(JSOP_NOT, 32, "not", "!", 1, 1, 1, 10, JOF_BYTE|JOF_DETECTING)
OPDEF(JSOP_BITNOT, 33, "bitnot", "~", 1, 1, 1, 10, JOF_BYTE)
OPDEF(JSOP_NEG, 34, "neg", "-", 1, 1, 1, 10, JOF_BYTE)
OPDEF(JSOP_NEW, 35, js_new_str, NULL, 3, -1, 1, 10, JOF_UINT16)
@ -143,8 +143,8 @@ OPDEF(JSOP_NULL, 64, js_null_str, js_null_str, 1, 0, 1, 12, JOF_BYTE)
OPDEF(JSOP_THIS, 65, js_this_str, js_this_str, 1, 0, 1, 12, JOF_BYTE)
OPDEF(JSOP_FALSE, 66, js_false_str, js_false_str, 1, 0, 1, 12, JOF_BYTE)
OPDEF(JSOP_TRUE, 67, js_true_str, js_true_str, 1, 0, 1, 12, JOF_BYTE)
OPDEF(JSOP_OR, 68, "or", NULL, 3, 1, 0, 0, JOF_JUMP)
OPDEF(JSOP_AND, 69, "and", NULL, 3, 1, 0, 0, JOF_JUMP)
OPDEF(JSOP_OR, 68, "or", NULL, 3, 1, 0, 0, JOF_JUMP|JOF_DETECTING)
OPDEF(JSOP_AND, 69, "and", NULL, 3, 1, 0, 0, JOF_JUMP|JOF_DETECTING)
/* The switch bytecodes have variable length. */
OPDEF(JSOP_TABLESWITCH, 70, "tableswitch", NULL, -1, 1, 0, 0, JOF_TABLESWITCH)
@ -180,7 +180,7 @@ OPDEF(JSOP_TRAP, 83, "trap", NULL, 1, 0, 0, 0, JOF_BYTE)
OPDEF(JSOP_GETARG, 84, "getarg", NULL, 3, 0, 1, 12, JOF_QARG |JOF_NAME)
OPDEF(JSOP_SETARG, 85, "setarg", NULL, 3, 1, 1, 1, JOF_QARG |JOF_NAME|JOF_SET|JOF_ASSIGNING)
OPDEF(JSOP_GETVAR, 86, "getvar", NULL, 3, 0, 1, 12, JOF_QVAR |JOF_NAME)
OPDEF(JSOP_SETVAR, 87, "setvar", NULL, 3, 1, 1, 1, JOF_QVAR |JOF_NAME|JOF_SET|JOF_ASSIGNING)
OPDEF(JSOP_SETVAR, 87, "setvar", NULL, 3, 1, 1, 1, JOF_QVAR |JOF_NAME|JOF_SET|JOF_ASSIGNING|JOF_DETECTING)
/* Push unsigned 16-bit int constant. */
OPDEF(JSOP_UINT16, 88, "uint16", NULL, 3, 0, 1, 12, JOF_UINT16)
@ -212,7 +212,7 @@ OPDEF(JSOP_POP2, 107,"pop2", NULL, 1, 2, 0, 0, JOF_BYTE)
/* ECMA-compliant assignment ops. */
OPDEF(JSOP_BINDNAME, 108,"bindname", NULL, 3, 0, 1, 0, JOF_CONST|JOF_NAME|JOF_SET|JOF_ASSIGNING)
OPDEF(JSOP_SETNAME, 109,"setname", NULL, 3, 2, 1, 1, JOF_CONST|JOF_NAME|JOF_SET|JOF_ASSIGNING)
OPDEF(JSOP_SETNAME, 109,"setname", NULL, 3, 2, 1, 1, JOF_CONST|JOF_NAME|JOF_SET|JOF_ASSIGNING|JOF_DETECTING)
/* Exception handling ops. */
OPDEF(JSOP_THROW, 110,"throw", NULL, 1, 1, 0, 0, JOF_BYTE)
@ -313,10 +313,10 @@ OPDEF(JSOP_DEFLOCALFUN, 138,"deflocalfun",NULL, 5, 0, 0, 0, JOF_DEFLOC
/* Extended jumps. */
OPDEF(JSOP_GOTOX, 139,"gotox", NULL, 5, 0, 0, 0, JOF_JUMPX)
OPDEF(JSOP_IFEQX, 140,"ifeqx", NULL, 5, 1, 0, 0, JOF_JUMPX)
OPDEF(JSOP_IFEQX, 140,"ifeqx", NULL, 5, 1, 0, 0, JOF_JUMPX|JOF_DETECTING)
OPDEF(JSOP_IFNEX, 141,"ifnex", NULL, 5, 1, 0, 0, JOF_JUMPX)
OPDEF(JSOP_ORX, 142,"orx", NULL, 5, 1, 0, 0, JOF_JUMPX)
OPDEF(JSOP_ANDX, 143,"andx", NULL, 5, 1, 0, 0, JOF_JUMPX)
OPDEF(JSOP_ORX, 142,"orx", NULL, 5, 1, 0, 0, JOF_JUMPX|JOF_DETECTING)
OPDEF(JSOP_ANDX, 143,"andx", NULL, 5, 1, 0, 0, JOF_JUMPX|JOF_DETECTING)
OPDEF(JSOP_GOSUBX, 144,"gosubx", NULL, 5, 0, 1, 0, JOF_JUMPX)
OPDEF(JSOP_CASEX, 145,"casex", NULL, 5, 1, 0, 0, JOF_JUMPX)
OPDEF(JSOP_DEFAULTX, 146,"defaultx", NULL, 5, 1, 0, 0, JOF_JUMPX)
@ -334,7 +334,7 @@ OPDEF(JSOP_RETRVAL, 153,"retrval", NULL, 1, 0, 0, 0, JOF_BYTE)
/* Optimized global variable ops (we don't bother doing a JSOP_FORGVAR op). */
OPDEF(JSOP_GETGVAR, 154,"getgvar", NULL, 3, 0, 1, 12, JOF_CONST|JOF_NAME)
OPDEF(JSOP_SETGVAR, 155,"setgvar", NULL, 3, 1, 1, 1, JOF_CONST|JOF_NAME|JOF_SET|JOF_ASSIGNING)
OPDEF(JSOP_SETGVAR, 155,"setgvar", NULL, 3, 1, 1, 1, JOF_CONST|JOF_NAME|JOF_SET|JOF_ASSIGNING|JOF_DETECTING)
OPDEF(JSOP_INCGVAR, 156,"incgvar", NULL, 3, 0, 1, 10, JOF_CONST|JOF_NAME|JOF_INC)
OPDEF(JSOP_DECGVAR, 157,"decgvar", NULL, 3, 0, 1, 10, JOF_CONST|JOF_NAME|JOF_DEC)
OPDEF(JSOP_GVARINC, 158,"gvarinc", NULL, 3, 0, 1, 10, JOF_CONST|JOF_NAME|JOF_INC|JOF_POST)