Jay Foad bdaa181007 [TwoAddressInstructionPass] Update existing physreg live intervals ...

In TwoAddressInstructionPass::processTiedPairs with
-early-live-intervals, update any preexisting physreg live intervals,
as well as virtreg live intervals. By default (without
-precompute-phys-liveness) physreg live intervals only exist for
registers that are live-in to some basic block.

Differential Revision: https://reviews.llvm.org/D113191

2021-11-05 21:20:30 +00:00

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