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A comment on Parsing Protobuf at 2+GB/S: How I Learned to Love Tail Calls in C. Parent comment
https://reviews.llvm.org/D29856
added the comment.
If I remove the check for `OptForSize` and `PredTBB == MBB`, we can optimize OP's report, but seem to regress basic tests like llvm/test/CodeGen/X86/conditional-tailcall.ll, literally flipping the branches incorrectly IIUC.
Filed: https://bugs.llvm.org/show_bug.cgi?id=50130
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https://reviews.llvm.org/D29856
added the comment.
If I remove the check for `OptForSize` and `PredTBB == MBB`, we can optimize OP's report, but seem to regress basic tests like llvm/test/CodeGen/X86/conditional-tailcall.ll, literally flipping the branches incorrectly IIUC.
Filed: https://bugs.llvm.org/show_bug.cgi?id=50130