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[JAEGER] Use cheaper comparison for GETPROP type checks.

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This commit is contained in:
David Anderson
2010-06-20 13:17:45 -07:00
parent fd1fe0d4b5
commit d8dcda1859
1 changed files with 2 additions and 5 deletions
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7
js/src/methodjit/Compiler.cpp
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@@ -1842,16 +1842,13 @@ mjit::Compiler::jsop_getprop(uint32 atomIndex)
Jump typeMismatch;
bool typeMismatchSet = false;
if (!top->isTypeKnown()) {
JS_STATIC_ASSERT(JSVAL_MASK32_NONFUNOBJ < JSVAL_MASK32_FUNOBJ);
RegisterID reg = frame.tempRegForType(top);
RegisterID type = frame.allocReg();
masm.move(reg, type);
masm.and32(Imm32(JSVAL_MASK32_OBJECT), type);
Jump j = masm.branch32(Assembler::BelowOrEqual, type, Imm32(JSVAL_MASK32_CLEAR));
Jump j = masm.branch32(Assembler::Below, reg, Imm32(JSVAL_MASK32_NONFUNOBJ));
stubcc.linkExit(j);
stubcc.leave();
stubcc.call(stubs::GetProp);
typeMismatch = stubcc.masm.jump();
frame.freeReg(type);
typeMismatchSet = true;
}