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    Fix tail merging to assign the (more) correct BasicBlock when splitting. · 97a1d7c4
    Andrew Trick authored
    This makes it possible to write unit tests that are less susceptible
    to minor code motion, particularly copy placement. block-placement.ll
    covers this case with -pre-RA-sched=source which will soon be
    default. One incorrectly named block is already fixed, but without
    this fix, enabling new coalescing and scheduling would cause more
    failures.
    
    llvm-svn: 184680
    97a1d7c4
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