[PATCH] D42724: [X86] Don't make 512-bit vectors legal when preferred vector width is 256 bits and 512 bits aren't required

[Simon Pilgrim via Phabricator via llvm-commits]

RKSimon added a comment.

What happens if 512-bit intrinsics are used? Do we have a decent error message?



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Comment at: lib/Target/X86/X86ISelLowering.cpp:1363
     // These operations are handled on non-VLX by artificially widening in
     // isel patterns.
     // TODO: Custom widen in lowering on non-VLX and drop the isel patterns?
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What happens with these? If we've disabled 512-bit vectors what is expected to happen?


https://reviews.llvm.org/D42724