DiSL: Use the InsnList iterable provided by AsmHelper.allInsnsFrom() to copying instruction list at selected places
DiSL: UnprocessedCode: avoid instruction list copy and replace index-based insn iteration with iterable-based
DiSL: AbstractParser, ParserHelper, BodyMarker, BytecodeMarker, InsnNodeMarker, NewObjMarker, NonskippingBytecodeMarker, MaxCalculator: avoid instruction list copy
DiSL: AfterInitBodyMarker: replace use of iterator with iterable
DiSL: SnippetUnprocessedCode: replace index-based insn iteration with iterable-based, cosmetic cleanups
DiSL: BasicBlockCalc: avoid instruction list copy, kill index-based hasNextNonVirtInstr() in favor of AsmHelper.nextNonVirtualInsn
DiSL: Weaver, WeavingCode, PartialEvaluator: add comments to keep intruction list copying in place until iterator use can be verified to be OK
DiSL: WeavingCode: avoid instruction list copy when not being modified