[PATCH] D143961: [llvm][SelectionDAGBuilder] use getRegistersForValue to generate legal copies

[Nick Desaulniers via Phabricator via llvm-commits]

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Fixes crashes observed when building the ARCH=i386 and ARCH=powerpc
Linux kernel.

Rewrite bits of SelectionDAGBuilder::visitCallBrLandingPad to re-use
machinery similar to SelectionDAGBuilder::visitInlineAsm. This is a bit
more robust for Flag Output Operands, outputs with a ConstraintVT that's
illegal for a given target, and outputs that require more than one
register.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D143961

Files:
  llvm/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp
  llvm/test/CodeGen/AArch64/callbr-asm-outputs-indirect-isel.ll
  llvm/test/CodeGen/PowerPC/callbr-asm-outputs-indirect-isel.ll
  llvm/test/CodeGen/X86/callbr-asm-outputs-indirect-isel-m32.ll
  llvm/test/CodeGen/X86/callbr-asm-outputs-indirect-isel.ll

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