[llvm] [InstCombine] fold ((x - 1) | (2^k - 1)) + 1 to (x + (2^k - 1)) & -(2^k) (PR #216436)

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``````````bash
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 bc43a8705..75bb97afe 100644
--- a/llvm/lib/Transforms/InstCombine/InstCombineAddSub.cpp
+++ b/llvm/lib/Transforms/InstCombine/InstCombineAddSub.cpp
@@ -1831,9 +1831,9 @@ Instruction *InstCombinerImpl::visitAdd(BinaryOperator &I) {
     if (match(&I,
               m_c_Add(m_OneUse(m_And(m_Neg(m_Value(A)), m_LowBitMask(LowMask))),
                       m_Deferred(A))) ||
-        match(&I,
-              m_Add(m_OneUse(m_Or(m_Add(m_Value(A), m_AllOnes()),
-                                               m_LowBitMask(LowMask))), m_One()))
+        match(&I, m_Add(m_OneUse(m_Or(m_Add(m_Value(A), m_AllOnes()),
+                                      m_LowBitMask(LowMask))),
+                        m_One()))
 
     ) {
       Value *NewAdd = Builder.CreateAdd(A, ConstantInt::get(Ty, *LowMask));

``````````

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https://github.com/llvm/llvm-project/pull/216436