[PATCH] Do not use isel on P7 and P8

[Olivier Sallenave]

As discussed with Hal, using the isel instruction can be beneficial with the current infrastructure because it reduces the number of basic blocks, and enables some late optimizations. Ultimately, we should keep the select instructions and expand them into branches after those optimizations happened. In the meantime, we will keep using isel by default and provide a -misel/-mno-isel option in Clang.

Thanks,
Olivier


http://reviews.llvm.org/D8260

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