[llvm] [InstCombine] Use samesign constraints in unsigned known-bits folds (PR #209097)

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<!--LLVM CODE FORMAT COMMENT: {clang-format}-->


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``````````bash
git-clang-format --diff origin/main HEAD --extensions h,cpp -- llvm/include/llvm/Analysis/ValueTracking.h llvm/lib/Analysis/ValueTracking.cpp llvm/lib/Transforms/InstCombine/InstCombineCompares.cpp --diff_from_common_commit
``````````

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View the diff from clang-format here.
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``````````diff
diff --git a/llvm/lib/Transforms/InstCombine/InstCombineCompares.cpp b/llvm/lib/Transforms/InstCombine/InstCombineCompares.cpp
index 6dcdd6e26..f65671a4e 100644
--- a/llvm/lib/Transforms/InstCombine/InstCombineCompares.cpp
+++ b/llvm/lib/Transforms/InstCombine/InstCombineCompares.cpp
@@ -7292,8 +7292,7 @@ static ICmpInst *canonicalizeCmpWithConstant(ICmpInst &I) {
   if (!Op1C)
     return nullptr;
 
-  auto FlippedStrictness =
-      getFlippedStrictnessPredicateAndConstant(Pred, Op1C);
+  auto FlippedStrictness = getFlippedStrictnessPredicateAndConstant(Pred, Op1C);
   if (!FlippedStrictness)
     return nullptr;
 

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https://github.com/llvm/llvm-project/pull/209097