re PR middle-end/51211 (ICE: SIGSEGV in execute_tm_mark (trans-mem.c:2242) with -fgnu-tm -O -freorder-blocks -ftracer --param hot-bb-frequency-fraction=1 and __transaction_atomic)

PR middle-end/51211
        * tracer.c (ignore_bb_p): Don't copy GIMPLE_TRANSACTION.

From-SVN: r181512