[PATCH] D26291: [AArch64] Spill instructions w/o immediate field may require an emergency spill slot

[Sanjin Sijaric via llvm-commits]

ssijaric created this revision.
ssijaric added reviewers: mcrosier, t.p.northover, jmolloy.
ssijaric added a subscriber: llvm-commits.
ssijaric set the repository for this revision to rL LLVM.
Herald added subscribers: qcolombet, rengolin, aemerson.

Make sure to create an emergency spill slot if we are spilling or reloading with instructions that have no immediate field.  Since we need to scavenge a spare register to hold the stack address, we currently assert if there is no spare register and no emergency spill slot to which to spill an existing register.


Repository:
  rL LLVM

https://reviews.llvm.org/D26291

Files:
  lib/Target/AArch64/AArch64FrameLowering.cpp
  lib/Target/AArch64/AArch64InstrInfo.cpp
  lib/Target/AArch64/AArch64MachineFunctionInfo.h
  test/CodeGen/AArch64/emergency_spill_slot_nonri.ll

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