[PATCH] D102612: SwiftTailCC: teach verifier musttail rules applicable to this CC.

[Tim Northover via Phabricator via llvm-commits]

t.p.northover updated this revision to Diff 346987.
t.p.northover added a comment.

Add error message to x86 backend if it can't honour a `musttail` call. It seems from the (presumably original) `musttail.ll` test that it's intended to override the `disable-tail-calls` function attribute, so I had to teach SelectionDAGBuilder about that too.


CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D102612/new/

https://reviews.llvm.org/D102612

Files:
  llvm/docs/LangRef.rst
  llvm/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp
  llvm/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.h
  llvm/lib/IR/Verifier.cpp
  llvm/lib/Target/AArch64/AArch64ISelLowering.cpp
  llvm/lib/Target/ARM/ARMISelLowering.cpp
  llvm/lib/Target/X86/X86ISelLowering.cpp
  llvm/test/CodeGen/AArch64/swifttail-call.ll
  llvm/test/CodeGen/X86/tailcall-swifttailcc.ll
  llvm/test/Verifier/swifttailcc-musttail-valid.ll
  llvm/test/Verifier/swifttailcc-musttail.ll
  llvm/test/Verifier/tailcc-musttail.ll

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