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[JAEGER] Completely inline JSOP_INSTANCEOF.

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This commit is contained in:
David Anderson
2010-06-23 23:18:54 -07:00
parent aa63a11186
commit e7c5c0f6be
3 changed files with 56 additions and 14 deletions
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62
js/src/methodjit/Compiler.cpp
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@@ -2753,25 +2753,67 @@ mjit::Compiler::jsop_instanceof()
return;
}
Jump typeCheck;
if (!rhs->isTypeKnown()) {
Jump firstSlow;
bool typeKnown = rhs->isTypeKnown();
if (!typeKnown) {
Jump j = frame.testFunObj(Assembler::NotEqual, rhs);
stubcc.linkExit(j);
stubcc.leave();
stubcc.call(stubs::InstanceOf);
firstSlow = stubcc.masm.jump();
}
stubcc.leave();
stubcc.call(stubs::InstanceOf);
/* This is sadly necessary because the error case needs the object. */
frame.dup();
jsop_getprop(cx->runtime->atomState.classPrototypeAtom, false);
prepareStubCall();
stubCall(stubs::FastInstanceOf, Uses(3), Defs(1));
frame.takeReg(Registers::ReturnReg);
frame.popn(3);
frame.pushTypedPayload(JSVAL_MASK32_BOOLEAN, Registers::ReturnReg);
/* Primitive prototypes are invalid. */
rhs = frame.peek(-1);
Jump j = frame.testPrimitive(Assembler::Equal, rhs);
stubcc.linkExit(j);
/* Allocate registers up front, because of branchiness. */
FrameEntry *lhs = frame.peek(-3);
RegisterID obj = frame.copyDataIntoReg(lhs);
RegisterID proto = frame.copyDataIntoReg(rhs);
RegisterID temp = frame.allocReg();
Jump isFalse = frame.testPrimitive(Assembler::Equal, lhs);
/* Quick test to avoid wrapped objects. */
masm.loadPtr(Address(obj, offsetof(JSObject, clasp)), temp);
masm.load32(Address(temp, offsetof(JSClass, flags)), temp);
masm.and32(Imm32(JSCLASS_IS_EXTENDED), temp);
j = masm.branchTest32(Assembler::NonZero, temp, temp);
stubcc.linkExit(j);
Address protoAddr(obj, offsetof(JSObject, fslots) + JSSLOT_PROTO * sizeof(Value));
Label loop = masm.label();
/* Walk prototype chain, break out on NULL or hit. */
masm.loadData32(protoAddr, obj);
Jump isFalse2 = masm.branchTestPtr(Assembler::Zero, obj, obj);
Jump isTrue = masm.branchPtr(Assembler::NotEqual, obj, proto);
isTrue.linkTo(loop, &masm);
masm.move(Imm32(1), temp);
isTrue = masm.jump();
isFalse.linkTo(masm.label(), &masm);
isFalse2.linkTo(masm.label(), &masm);
masm.move(Imm32(0), temp);
isTrue.linkTo(masm.label(), &masm);
frame.freeReg(proto);
frame.freeReg(obj);
stubcc.leave();
stubcc.call(stubs::FastInstanceOf);
frame.popn(3);
frame.pushTypedPayload(JSVAL_MASK32_BOOLEAN, temp);
firstSlow.linkTo(stubcc.masm.label(), &stubcc.masm);
stubcc.rejoin(1);
}