[llvm] [DAG] Support saturated truncate (PR #99418)

[via llvm-commits]

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@@ -292,15 +292,15 @@ entry:
 
 ; Test the (concat_vectors (X), (trunc(umin(smax(Y, 0), 2^n))))) pattern.
 
+; TODO: %min is a value between 0 and 255 and is within the unsigned range of i8.
+; So it is saturated truncate. we have an optimization opportunity.
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ParkHanbum wrote:

(right place :))
agree. I also added a comment with that intention and I'm thinking maybe adding code to DAGCombiner can solve it.
do you think I should include this in this patch as well?


https://github.com/llvm/llvm-project/pull/99418