[PATCH] D37600: Preserve existing registers when adding pristines to LivePhysRegs

[Krzysztof Parzyszek via Phabricator via llvm-commits]

kparzysz created this revision.

If a non-pristine, callee-saved register is already present in LivePhysRegs, calling addPristines would cause it to be removed.  Make sure that the existing contents of LivePhysRegs are preserved.


Repository:
  rL LLVM

https://reviews.llvm.org/D37600

Files:
  include/llvm/CodeGen/LivePhysRegs.h
  lib/CodeGen/LivePhysRegs.cpp
  test/CodeGen/Hexagon/livephysregs-add-pristines.mir

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