[PATCH] D55580: [NVPTX] do not rely on cached subtarget info.

[Artem Belevich via Phabricator via llvm-commits]

tra created this revision.
tra added reviewers: echristo, jlebar.
Herald added subscribers: bixia, hiraditya, sanjoy, jholewinski.

If a module has function references, but no functions
themselves, we may end up never calling runOnMachineFunction
and therefore would never initialize nvptxSubtarget field
which would eventually cause a crash.

Instead of relying on nvptxSubtarget being initialized by
one of the methods, retrieve subtarget info directly.

@echristo : Added you as a reviewer as you were refactoring this code some time back (rL229785 <https://reviews.llvm.org/rL229785>)


https://reviews.llvm.org/D55580

Files:
  llvm/lib/Target/NVPTX/NVPTXAsmPrinter.cpp
  llvm/lib/Target/NVPTX/NVPTXAsmPrinter.h
  llvm/test/CodeGen/NVPTX/nofunc.ll

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