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2019-12-04T18:38:50.113920Z
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Merge commit 241cbf201 from llvm git (by Nemanja Ivanovic):

  [PowerPC] Fix crash in peephole optimization

  When converting reg+reg shifts to reg+imm rotates, we neglect to
  consider the CodeGenOnly versions of the 32-bit shift mnemonics. This
  means we produce a rotate with missing operands which causes a crash.

  Committing this fix without review since it is non-controversial that
  the list of mnemonics to consider should include the 64-bit aliases
  for the exact mnemonics.

  Fixes PR44183.

This should fix "Assertion failed: (idx < size()), function operator[],
file /usr/src/contrib/llvm/include/llvm/ADT/SmallVector.h, line 153"
when building the graphics/mesa-dri port for the PowerPC64 ELFv2 ABI.

Reported by:	Alfredo Dal'Ava Júnior <alfredo.junior@eldorado.org.br>
MFC after:      1 month
X-MFC-With:     r353358

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