[llvm] [InstCombine] Set `samesign` when converting signed predicates into unsigned (PR #112642)

[Nikita Popov via llvm-commits]

================
@@ -6774,8 +6774,11 @@ Instruction *InstCombinerImpl::foldICmpUsingKnownBits(ICmpInst &I) {
   // have the same sign.
   if (I.isSigned() &&
----------------
nikic wrote:

Shouldn't we also set the flag if `!isSigned()`?

https://github.com/llvm/llvm-project/pull/112642