[llvm] [ConstantRange] Improve `shlWithNoWrap` (PR #101800)

[Nikita Popov via llvm-commits]

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@@ -1624,12 +1624,43 @@ ConstantRange ConstantRange::shlWithNoWrap(const ConstantRange &Other,
     return getEmpty();
 
   ConstantRange Result = shl(Other);
+  if (!NoWrapKind)
+    return Result;
 
-  if (NoWrapKind & OverflowingBinaryOperator::NoSignedWrap)
-    Result = Result.intersectWith(sshl_sat(Other), RangeType);
+  KnownBits Known = toKnownBits();
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nikic wrote:

Can move this into the signed case now.

https://github.com/llvm/llvm-project/pull/101800