[PATCH] D62249: RegAllocFast: Set MayLiveAcrossBlocks when allocating uses

[Quentin Colombet via Phabricator via llvm-commits]

qcolombet added inline comments.


================
Comment at: lib/CodeGen/RegAllocFast.cpp:297
+  if (MayLiveAcrossBlocks.test(TargetRegisterInfo::virtReg2Index(VirtReg)))
+    return true;
+
----------------
arsenm wrote:
> qcolombet wrote:
> > We should return `!MBB->pred_empty()`
> Does it matter for an unreachable block?
It could be the entry block, couldn't it?


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  https://reviews.llvm.org/D62249/new/

https://reviews.llvm.org/D62249