[PATCH] D105807: [X86] pr51000 struct return tailcalling

[Nathan Sidwell via Phabricator via llvm-commits]

urnathan updated this revision to Diff 359019.
urnathan added a comment.

Here is an updated patch with a simpler goal.  It only prevents sibcalling when the caller is an sret pointer function.  To enable that to sibcall we need to trace the data flow to the callee's sret parameter, and that doesn't appear easy -- at least as a first foray into llvm's backend.  So let's just have this smaller improvement, which does solve the problem the original bug report had.


CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D105807/new/

https://reviews.llvm.org/D105807

Files:
  clang/test/CodeGenCXX/pr51000.cpp
  llvm/lib/Target/X86/X86ISelLowering.cpp
  llvm/lib/Target/X86/X86ISelLowering.h
  llvm/test/CodeGen/X86/sibcall.ll

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