[PATCH] D157907: [NFC] Refactor X86TargetLowering::getGlobalWrapperKind()

[Arthur Eubanks via Phabricator via llvm-commits]

aeubanks added a comment.

reduced

  target triple = "x86_64-apple-macosx13.0.0"
  
  define void @f() noinline optnone {
  bb:
    switch i64 0, label %bb1 [
      i64 0, label %bb1
      i64 2, label %bb2
      i64 5, label %bb4
      i64 4, label %bb3
    ]
  
  bb1:                                              ; preds = %bb, %bb
    ret void
  
  bb2:                                              ; preds = %bb
    ret void
  
  bb3:                                              ; preds = %bb
    ret void
  
  bb4:                                              ; preds = %bb
    ret void
  }
  
  $ lli --relocation-model=pic --code-model=large --jit-kind=mcjit --entry-function=f /tmp/a.ll

has something to do with jump tables (which are actually known to be an issue in clang's large code model)

https://github.com/llvm/llvm-project/blob/5c92c9f34a7dba804479acef62c576d1a170ef1f/llvm/lib/Target/X86/X86ISelLoweringCall.cpp#L515


Repository:
  rG LLVM Github Monorepo

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  https://reviews.llvm.org/D157907/new/

https://reviews.llvm.org/D157907