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Sort of a grab-bag of improvements:
GOTO_ERROR(error)withERROR_NO_POP().GOTO_UNWINDwithGOTO_TIER_ONE, replaceEXIT_TO_TIER1withGOTO_TIER_ONE, unify thegoto_to_tier1,exit_to_tier1, anderror_tier_twolabels into theGOTO_TIER_ONEmacro, and remove the unusedexit_to_tier1_dynamiclabel andEXIT_TO_TIER1_DYNAMICmacro.Py_DECREFandNULLs oftstate->previous_executorwithPy_CLEARcalls, sincePy_DECREFescapes.GOTO_TIER_TWOmacro.CURRENT_TARGETmacro so the same return-to-tier-one logic can be shared by the interpreter and JIT.(void)item;lines from the abstract interpreter (these were ironically forcing the values to be loaded)._PyFrame_GetBytecodeas non-escaping.PATCH_VALUEimplementation for the JIT templates and the shim frame.