[PATCH] D14357: [ARM] Enable shrink-wrapping by default

[A. Skrobov via llvm-commits]

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This change led to generation of invalid code on Thumb1 targets.

Attaching a reproducer. The function epilogue gets compiled into `pop {r4, r5, r6, lr}`, which is invalid for Thumb1; then, it's replaced with a (valid) `pop {r4, r5, r6}` instruction, which leaves the stack unbalanced.

F1110733: broken.ll <http://reviews.llvm.org/F1110733>


Repository:
  rL LLVM

http://reviews.llvm.org/D14357