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...ly redundant. It is a phi of the computations in 9 and 17. Once done (almost!), newgvn will actually detect that a simple phi inserted in 17 would have the same value as %21. The work is https://bugs.llvm.org//show_bug.cgi?id=31868<https://urldefense.proofpoint.com/v2/url?u=https-3A__bugs.llvm.org__show-5Fbug.cgi-3Fid-3D31868&d=DwMFaQ&c=5VD0RTtNlTh3ycd41b3MUw&r=kOsLCgQzH7N8ptZ7diJD9g&m=Sv5T08BLc94DspNTrXv67YwHnXVNmVllN9p8B7fZgTs&s=bOw6bI0rowF-LG3wUx222kr4j4lEwZCz1sGk-DR39Ts&e=> Wwhen we see op of phis, we use fake instructions to treat it like we saw ops in the predeces...

...ly redundant. It is a phi of the computations in 9 and 17. Once done (almost!), newgvn will actually detect that a simple phi inserted in 17 would have the same value as %21. The work is https://bugs.llvm.org//show_bug.cgi?id=31868<https://urldefense.proofpoint.com/v2/url?u=https-3A__bugs.llvm.org__show-5Fbug.cgi-3Fid-3D31868&d=DwMFaQ&c=5VD0RTtNlTh3ycd41b3MUw&r=kOsLCgQzH7N8ptZ7diJD9g&m=Sv5T08BLc94DspNTrXv67YwHnXVNmVllN9p8B7fZgTs&s=bOw6bI0rowF-LG3wUx222kr4j4lEwZCz1sGk-DR39Ts&e=> Wwhen we see op of phis, we use fake instructions to treat it like we saw ops in the predeces...

Hello, In some of our internal benchmarks, I observe that LLVM performs worse than GCC because LLVM fails to perform PRE when GCC can. I hope this problem goes away when NewGVN equipped with PRE, and wonder if anyone has an idea about the status of PRE on top of NewGVN. Thanks! Best, Taewook -------------- next part -------------- An HTML attachment was scrubbed... URL: