- Revert "[CodeGenPrepare] limit overflow intrinsic matching to a single basic block" This reverts commit r359879, which introduced a compiler crash.
- RegAllocFast: Add heuristic to detect values not live-out of a block Add an improved/new heuristic to catch more cases when values are not live out of a basic block. Patch by Matthias Braun
- Mark is_trivially_destructible as unsupported with apple-clang-9 See discussion on https://reviews.llvm.org/D48292
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