[llvm] [InstCombine] Prevent infinite loop with two shifts (PR #118806)

[via llvm-commits]

github-actions[bot] wrote:

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


:warning: C/C++ code formatter, clang-format found issues in your code. :warning:

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``````````bash
git-clang-format --diff ff78cd5f3d6ae8e7084f0aff4df4164ff5a38af9 5977d79c6ce41cfc4cbf18764eec8cae1c40f12a --extensions cpp -- llvm/lib/Transforms/InstCombine/InstCombineShifts.cpp
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View the diff from clang-format here.
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``````````diff
diff --git a/llvm/lib/Transforms/InstCombine/InstCombineShifts.cpp b/llvm/lib/Transforms/InstCombine/InstCombineShifts.cpp
index 3fb094579d..a57fdbebc7 100644
--- a/llvm/lib/Transforms/InstCombine/InstCombineShifts.cpp
+++ b/llvm/lib/Transforms/InstCombine/InstCombineShifts.cpp
@@ -786,9 +786,8 @@ Instruction *InstCombinerImpl::FoldShiftByConstant(Value *Op0, Constant *C1,
   Constant *C2;
   Value *X;
   bool IsLeftShift = I.getOpcode() == Instruction::Shl;
-  if (match(Op0,
-            m_BinOp(I.getOpcode(), m_ImmConstant(C2),
-                    m_CombineAnd(m_Value(X), m_Unless(m_Constant()))))) {
+  if (match(Op0, m_BinOp(I.getOpcode(), m_ImmConstant(C2),
+                         m_CombineAnd(m_Value(X), m_Unless(m_Constant()))))) {
     Instruction *R = BinaryOperator::Create(
         I.getOpcode(), Builder.CreateBinOp(I.getOpcode(), C2, C1), X);
     BinaryOperator *BO0 = cast<BinaryOperator>(Op0);

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https://github.com/llvm/llvm-project/pull/118806