[Patch] [ARM] Fix bug in tryFoldSPUpdateIntoPushPop

Weiming Zhao weimingz at codeaurora.org
Thu Mar 13 16:14:11 PDT 2014



This patch fixes the issue in http://llvm.org/bugs/show_bug.cgi?id=19136

There might be two ways to do it: One is to fix tryFoldSPUpdateIntoPushPop()
to let it check livness of subregs.

The other ways is to fix MBB->computeRegisterLiveness().


The patch uses the first way.


Please help to review.






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