Sanjay Patel 85294703a7 [InstCombine] fold fcmp-of-copysign idiom ...

As discussed in:
https://llvm.org/PR49179
...this pattern shows up in library code.
There are several potential generalizations as noted,
but we need to be careful that we get FP special-values
right, and it's not clear how much variation we should
expect to see from this exact idiom.

2021-02-17 10:32:33 -05:00

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