Sanjay Patel a0ce2338a0 [InstCombine] reassociate fsub+fadd with FMF to increase adds and throughput ...

The -reassociate pass tends to transform this kind of pattern into
something that is worse for vectorization and codegen. See PR43953:
https://bugs.llvm.org/show_bug.cgi?id=43953

2020-05-26 13:17:15 -04:00

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