[PATCH] D81860: [ARM] Fix crash trying to generate i1 immediates

Mon Jun 15 11:31:45 PDT 2020

dmgreen created this revision.
dmgreen added reviewers: SjoerdMeijer, samparker, efriedma, simon_tatham, ostannard.
Herald added subscribers: danielkiss, hiraditya, kristof.beyls.
Herald added a project: LLVM.
dmgreen retitled this revision from "[ARM] Fix crash trying to general i1 immediates" to "[ARM] Fix crash trying to generate i1 immediates".

These code patterns attempt to call isVMOVModifiedImm on a splat of i1 values, leading to an unreachable being hit. I've guarded the call on a more specific set of sizes, as i1 is legal under MVE.

https://reviews.llvm.org/D81860

Files:
  llvm/lib/Target/ARM/ARMISelLowering.cpp
  llvm/test/CodeGen/Thumb2/mve-vmovimm.ll

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