[llvm] [InstCombine] Fold commuted add of udiv/urem by two (#206272) (PR #207249)

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git-clang-format --diff origin/main HEAD --extensions cpp -- llvm/lib/Transforms/InstCombine/InstCombineAddSub.cpp --diff_from_common_commit
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``````````diff
diff --git a/llvm/lib/Transforms/InstCombine/InstCombineAddSub.cpp b/llvm/lib/Transforms/InstCombine/InstCombineAddSub.cpp
index 266a22370..ebc48123c 100644
--- a/llvm/lib/Transforms/InstCombine/InstCombineAddSub.cpp
+++ b/llvm/lib/Transforms/InstCombine/InstCombineAddSub.cpp
@@ -1199,7 +1199,7 @@ Value *InstCombinerImpl::SimplifyAddWithRemainder(BinaryOperator &I) {
     Div = LHS, C1 = APInt(I.getType()->getScalarSizeInBits(), 1);
   if (!RHS->hasOneUse() || !MatchMul(RHS, Rem, C2))
     Rem = RHS, C2 = APInt(I.getType()->getScalarSizeInBits(), 1);
-  // The remainder may be spelled `and X, lowmask` (rem by a power of two), 
+  // The remainder may be spelled `and X, lowmask` (rem by a power of two),
   // not just urem/srem, so m_IRem alone misses the commuted form
   // `add (and X, C), (lshr X, N)`.
   // Detect any remainder form here so it lands in Rem.

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https://github.com/llvm/llvm-project/pull/207249