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e233b8c64b
will cause us to miss cases where the input pointer to a load could be value numbered to another load. Something like this: %X = load int* %P1 %Y = load int* %P2 Those are obviously the same if P1/P2 are the same. The code this patch removes attempts to handle that. However, since GCSE iterates, this doesn't actually buy us anything: GCSE will first replace P1 or P2 with the other one, then the load can be value numbered as equal. Removing this code speeds up gcse a lot. On 176.gcc in debug mode, this speeds up gcse from 29.08s -> 25.73s, a 13% savings. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19906 91177308-0d34-0410-b5e6-96231b3b80d8
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