[BACKPORT] MachineBasicBlock: add liveout iterator aware of which liveins are defined by the runtime. #111
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…fined by the runtime. Using this in RegAlloc fast reduces register pressure, and in some cases allows x86 code to compile that wouldn't before.
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LGTM! |
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…llvm-pass Implement BasicBlockTracer pass
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Using this in RegAlloc fast reduces register pressure, and in some cases allows
x86 code to compile that wouldn't before.
This backports commit llvm@c1dc2672, which fixes issue rust-lang/rust#86758