5addddf8f1
This patch simplifies the logic of `insertWaitcntInBlock()` by moving the code that removes the redundant soft xcnt instructions to a new function: `removeRedundantSoftXcnts()`. While doing so, this patch also cleans up the logic a bit by dropping the AtomiRMWState and the corresponding functions. This helps in several ways: - insertWaitcntInBlock() will now do what its name suggests, i.e., only insert and not remove. - it makes it clear that removal of softxcnts is orthogonal to insertion of waitcnts. - we won't have to worry about both erased and new instruction in insertWaitcntInBlock()'s loop. The change should be NFC.
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