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[INFER] Don't use a stub call in PROPINC on known non-objects, bug 646429.

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This commit is contained in:
Brian Hackett 2011-03-30 11:47:02 -07:00
parent 2d35b04f7f
commit 221e7c805b
1 changed files with 78 additions and 82 deletions
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160
js/src/methodjit/Compiler.cpp
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@ -5132,99 +5132,95 @@ mjit::Compiler::jsop_propinc(JSOp op, VoidStubAtom stub, uint32 index)
{
JSAtom *atom = script->getAtom(index);
#if defined JS_POLYIC
FrameEntry *objFe = frame.peek(-1);
if (!objFe->isTypeKnown() || objFe->getKnownType() == JSVAL_TYPE_OBJECT) {
jsbytecode *next = &PC[JSOP_PROPINC_LENGTH];
bool pop = (JSOp(*next) == JSOP_POP) && !a->analysis.jumpTarget(next);
int amt = (op == JSOP_PROPINC || op == JSOP_INCPROP) ? -1 : 1;
jsbytecode *next = &PC[JSOP_PROPINC_LENGTH];
bool pop = (JSOp(*next) == JSOP_POP) && !a->analysis.jumpTarget(next);
int amt = (op == JSOP_PROPINC || op == JSOP_INCPROP) ? -1 : 1;
if (pop || (op == JSOP_INCPROP || op == JSOP_DECPROP)) {
/*
* These cases are easier, the original value is not observed.
* Use a consistent stack layout for the value as the observed case,
* so that if the operation overflows the stub will be able to find
* the modified object.
*/
if (pop || (op == JSOP_INCPROP || op == JSOP_DECPROP)) {
/*
* These cases are easier, the original value is not observed.
* Use a consistent stack layout for the value as the observed case,
* so that if the operation overflows the stub will be able to find
* the modified object.
*/
frame.dup();
// OBJ OBJ
frame.dup();
// OBJ OBJ
frame.dup();
// OBJ * OBJ
frame.dup();
// OBJ * OBJ
if (!jsop_getprop(atom, JSVAL_TYPE_UNKNOWN))
return Compile_Error;
// OBJ * V
if (!jsop_getprop(atom, JSVAL_TYPE_UNKNOWN))
return Compile_Error;
// OBJ * V
frame.push(Int32Value(amt));
// OBJ * V 1
frame.push(Int32Value(amt));
// OBJ * V 1
/* Use sub since it calls ValueToNumber instead of string concat. */
frame.syncAt(-4);
if (!jsop_binary(JSOP_SUB, stubs::Sub, JSVAL_TYPE_UNKNOWN, pushedTypeSet(0)))
return Compile_Retry;
// OBJ * V+1
/* Use sub since it calls ValueToNumber instead of string concat. */
frame.syncAt(-4);
if (!jsop_binary(JSOP_SUB, stubs::Sub, JSVAL_TYPE_UNKNOWN, pushedTypeSet(0)))
return Compile_Retry;
// OBJ * V+1
frame.shimmy(1);
// OBJ V+1
frame.shimmy(1);
// OBJ V+1
if (!jsop_setprop(atom, false))
return Compile_Error;
// V+1
if (!jsop_setprop(atom, false))
return Compile_Error;
// V+1
if (pop)
frame.pop();
} else {
/* The pre-value is observed, making this more tricky. */
frame.dup();
// OBJ OBJ
if (!jsop_getprop(atom, JSVAL_TYPE_UNKNOWN))
return Compile_Error;
// OBJ V
jsop_pos();
// OBJ N
frame.dup();
// OBJ N N
frame.push(Int32Value(-amt));
// OBJ N N 1
frame.syncAt(-4);
if (!jsop_binary(JSOP_ADD, stubs::Add, JSVAL_TYPE_UNKNOWN, pushedTypeSet(0)))
return Compile_Retry;
// OBJ N N+1
frame.dupAt(-3);
// OBJ N N+1 OBJ
frame.dupAt(-2);
// OBJ N N+1 OBJ N+1
if (!jsop_setprop(atom, false))
return Compile_Error;
// OBJ N N+1 N+1
frame.popn(2);
// OBJ N
frame.shimmy(1);
// N
}
if (pop)
PC += JSOP_POP_LENGTH;
} else
#endif
{
prepareStubCall(Uses(1));
masm.move(ImmPtr(atom), Registers::ArgReg1);
INLINE_STUBCALL(stub);
frame.pop();
pushSyncedEntry(0);
frame.pop();
} else {
/* The pre-value is observed, making this more tricky. */
frame.dup();
// OBJ OBJ
if (!jsop_getprop(atom, JSVAL_TYPE_UNKNOWN))
return Compile_Error;
// OBJ V
jsop_pos();
// OBJ N
frame.dup();
// OBJ N N
frame.push(Int32Value(-amt));
// OBJ N N 1
frame.syncAt(-4);
if (!jsop_binary(JSOP_ADD, stubs::Add, JSVAL_TYPE_UNKNOWN, pushedTypeSet(0)))
return Compile_Retry;
// OBJ N N+1
frame.dupAt(-3);
// OBJ N N+1 OBJ
frame.dupAt(-2);
// OBJ N N+1 OBJ N+1
if (!jsop_setprop(atom, false))
return Compile_Error;
// OBJ N N+1 N+1
frame.popn(2);
// OBJ N
frame.shimmy(1);
// N
}
if (pop)
PC += JSOP_POP_LENGTH;
#else
prepareStubCall(Uses(1));
masm.move(ImmPtr(atom), Registers::ArgReg1);
INLINE_STUBCALL(stub);
frame.pop();
pushSyncedEntry(0);
#endif
PC += JSOP_PROPINC_LENGTH;
return Compile_Okay;