Fix VSO 279380.
Fix VSO 279380.

The liveness pass attempts to remove dead stores that it encounters
during its liveness computation. Successfully removing a dead store,
however, may invalidate the results of the computation. Therefore, the
pass operates as a fixed-point algorithm: it recomputes liveness until
either the contents of the function do not change or the removed code
does not change the results.

When running liveness on LIR, the correct flag--`fgStmtRemoved`--was not
being set if a dead store was succesfully removed. This caused the
liveness pass to terminate early and produce invalid results in certain
cases. This fix sets `fgStmtRemoved` when a dead store is successfully
removed in an LIR block.

mmitche/coreclr,cmckinsey/coreclr,botaberg/coreclr,gkhanna79/coreclr,gkhanna79/coreclr,dpodder/coreclr,AlexGhiondea/coreclr,pgavlin/coreclr,cydhaselton/coreclr,poizan42/coreclr,rartemev/coreclr,hseok-oh/coreclr,kyulee1/coreclr,wtgodbe/coreclr,wateret/coreclr,krytarowski/coreclr,YongseopKim/coreclr,dpodder/coreclr,cydhaselton/coreclr,botaberg/coreclr,gkhanna79/coreclr,yeaicc/coreclr,mmitche/coreclr,ruben-ayrapetyan/coreclr,poizan42/coreclr,sjsinju/coreclr,JonHanna/coreclr,James-Ko/coreclr,tijoytom/coreclr,krk/coreclr,wateret/coreclr,hseok-oh/coreclr,botaberg/coreclr,JosephTremoulet/coreclr,Dmitry-Me/coreclr,cydhaselton/coreclr,neurospeech/coreclr,wtgodbe/coreclr,cmckinsey/coreclr,russellhadley/coreclr,dpodder/coreclr,Dmitry-Me/coreclr,sagood/coreclr,kyulee1/coreclr,wateret/coreclr,russellhadley/coreclr,cmckinsey/coreclr,rartemev/coreclr,jamesqo/coreclr,cshung/coreclr,alexperovich/coreclr,neurospeech/coreclr,cmckinsey/coreclr,jamesqo/coreclr,Dmitry-Me/coreclr,cshung/coreclr,gkhanna79/coreclr,krk/coreclr,tijoytom/coreclr,alexperovich/coreclr,AlexGhiondea/coreclr,yeaicc/coreclr,cmckinsey/coreclr,AlexGhiondea/coreclr,poizan42/coreclr,neurospeech/coreclr,parjong/coreclr,neurospeech/coreclr,mskvortsov/coreclr,parjong/coreclr,tijoytom/coreclr,kyulee1/coreclr,jamesqo/coreclr,JonHanna/coreclr,gkhanna79/coreclr,mskvortsov/coreclr,yizhang82/coreclr,pgavlin/coreclr,cydhaselton/coreclr,qiudesong/coreclr,tijoytom/coreclr,sagood/coreclr,cydhaselton/coreclr,YongseopKim/coreclr,krk/coreclr,rartemev/coreclr,James-Ko/coreclr,Dmitry-Me/coreclr,krytarowski/coreclr,James-Ko/coreclr,krytarowski/coreclr,yeaicc/coreclr,qiudesong/coreclr,sjsinju/coreclr,poizan42/coreclr,cshung/coreclr,ragmani/coreclr,JonHanna/coreclr,James-Ko/coreclr,parjong/coreclr,ragmani/coreclr,sagood/coreclr,alexperovich/coreclr,mskvortsov/coreclr,AlexGhiondea/coreclr,tijoytom/coreclr,yizhang82/coreclr,wtgodbe/coreclr,russellhadley/coreclr,jamesqo/coreclr,YongseopKim/coreclr,yeaicc/coreclr,ruben-ayrapetyan/coreclr,wateret/coreclr,krk/coreclr,dpodder/coreclr,krk/coreclr,yeaicc/coreclr,botaberg/coreclr,mmitche/coreclr,JosephTremoulet/coreclr,YongseopKim/coreclr,russellhadley/coreclr,mskvortsov/coreclr,sjsinju/coreclr,qiudesong/coreclr,wtgodbe/coreclr,wtgodbe/coreclr,kyulee1/coreclr,pgavlin/coreclr,ragmani/coreclr,cmckinsey/coreclr,russellhadley/coreclr,krk/coreclr,sagood/coreclr,rartemev/coreclr,ruben-ayrapetyan/coreclr,JonHanna/coreclr,sjsinju/coreclr,ragmani/coreclr,gkhanna79/coreclr,kyulee1/coreclr,sagood/coreclr,JosephTremoulet/coreclr,YongseopKim/coreclr,JonHanna/coreclr,rartemev/coreclr,yizhang82/coreclr,James-Ko/coreclr,poizan42/coreclr,sjsinju/coreclr,yeaicc/coreclr,JonHanna/coreclr,sagood/coreclr,poizan42/coreclr,yizhang82/coreclr,jamesqo/coreclr,parjong/coreclr,YongseopKim/coreclr,rartemev/coreclr,ragmani/coreclr,wateret/coreclr,qiudesong/coreclr,mmitche/coreclr,Dmitry-Me/coreclr,neurospeech/coreclr,mskvortsov/coreclr,qiudesong/coreclr,hseok-oh/coreclr,hseok-oh/coreclr,parjong/coreclr,mmitche/coreclr,Dmitry-Me/coreclr,yeaicc/coreclr,botaberg/coreclr,sjsinju/coreclr,ruben-ayrapetyan/coreclr,krytarowski/coreclr,kyulee1/coreclr,cshung/coreclr,wtgodbe/coreclr,wateret/coreclr,dpodder/coreclr,neurospeech/coreclr,cmckinsey/coreclr,hseok-oh/coreclr,krytarowski/coreclr,JosephTremoulet/coreclr,dpodder/coreclr,JosephTremoulet/coreclr,ruben-ayrapetyan/coreclr,qiudesong/coreclr,JosephTremoulet/coreclr,cshung/coreclr,alexperovich/coreclr,pgavlin/coreclr,Dmitry-Me/coreclr,cydhaselton/coreclr,hseok-oh/coreclr,yizhang82/coreclr,botaberg/coreclr,James-Ko/coreclr,AlexGhiondea/coreclr,yizhang82/coreclr,jamesqo/coreclr,alexperovich/coreclr,pgavlin/coreclr,mmitche/coreclr,mskvortsov/coreclr,pgavlin/coreclr,ruben-ayrapetyan/coreclr,russellhadley/coreclr,AlexGhiondea/coreclr,cshung/coreclr,ragmani/coreclr,parjong/coreclr,tijoytom/coreclr,krytarowski/coreclr,alexperovich/coreclr