[PATCH] D106053: [CodeGen] Remove pending AssertZext AssertSext in promoting FP_TO_INT

[Xiang Zhang via Phabricator via llvm-commits]

xiangzhangllvm added a comment.

> If the loaded value is not in the range [0.0, 1.0] so that %i375 is in the range [0.0, 255.0], then I don't know what value the fptoui is supposed to produce.

Or we can see in this way.
In the edge calculation, we just need to load 4 elements of v8f32, but for performance reason, we usually load full (8) elements. So some of its loaded element has no meaning (may over flow).
So the shuffle don't select these element, but the shuffle may zero there element then for other use. (very just like this small reproduce case )


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  https://reviews.llvm.org/D106053/new/

https://reviews.llvm.org/D106053