[PATCH] D158490: [AArch64] Disable GlobalISel/FastISel for more SME functions

[Dave Green via Phabricator via llvm-commits]

dmgreen created this revision.
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The patch D136361 <https://reviews.llvm.org/D136361> disabled GlobalISel and FastISel for some SME functions, as the saving and restoring of SM is not yet handled. There were several tests added for fp128 fadd, which will be expanded to a libcall, that only happened to work by accident and did not handle other cases such as f32/f64 frem libcalls.

                                

This extends the cases where GlobalISel / FastISel is disabled for functions with SME attributes, under the assumption that it is difficult to tell what will become a libcall reliably, and so should fall back for all function until GlobalISel and/or FastISel can handle them.


https://reviews.llvm.org/D158490

Files:
  llvm/lib/Target/AArch64/AArch64FastISel.cpp
  llvm/lib/Target/AArch64/GISel/AArch64CallLowering.cpp
  llvm/test/CodeGen/AArch64/sme-disable-gisel-fisel.ll

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