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...s far from being >> >> solved >> >> fundamentally. Recently we found another problematic case >> >> described in >> >> https://llvm.org/bugs/show_bug.cgi?id=29065. And I believe I can >> >> create more tests revealing similar problems. In PR29065, I >> >> explained >> >> why it is difficult to fix the problem by extending D12090 and >> >> D21313. >> >> It is possible but still not very easy to fix the problem by >> >> enhancing >> >> existing cleanup passes. So I am sol...

...D21313 >> already relieved the problem somewhat, but it is far from being solved >> fundamentally. Recently we found another problematic case described in >> https://llvm.org/bugs/show_bug.cgi?id=29065. And I believe I can >> create more tests revealing similar problems. In PR29065, I explained >> why it is difficult to fix the problem by extending D12090 and D21313. >> It is possible but still not very easy to fix the problem by enhancing >> existing cleanup passes. So I am soliciting ideas here about how to >> solve the problem in a more fundamental...

...D12090 and https://reviews.llvm.org/D21313 already relieved the problem somewhat, but it is far from being solved fundamentally. Recently we found another problematic case described in https://llvm.org/bugs/show_bug.cgi?id=29065. And I believe I can create more tests revealing similar problems. In PR29065, I explained why it is difficult to fix the problem by extending D12090 and D21313. It is possible but still not very easy to fix the problem by enhancing existing cleanup passes. So I am soliciting ideas here about how to solve the problem in a more fundamental way. One thing I am always wonderin...