http://gcc.gnu.org/bugzilla/show_bug.cgi?id=58256
--- Comment #12 from Chen Gang <gang.chen at asianux dot com> --- I am just comparing the issue code demo and the other 3 correct code demo (the demostrations which del one param, or add one param, or add two params are all correct). I find the issue code contents additonal one 'code_label' insn in its rtx tree, before create trace. I will continue analyzing, it seems, by comparing the issue demo and the other 3 correct demo, and dumping related information step by step, can find the root cause.
