[llvm] [LSR] Recognize vscale-relative immediates (PR #88124)

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


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``````````bash
git-clang-format --diff 195d8ac26d91ca798733c3a5f58d67992d43503d 1d10189124e51d6b5c7fbfb436c9a69ee1c086c3 -- llvm/lib/Transforms/Scalar/LoopStrengthReduce.cpp
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View the diff from clang-format here.
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``````````diff
diff --git a/llvm/lib/Transforms/Scalar/LoopStrengthReduce.cpp b/llvm/lib/Transforms/Scalar/LoopStrengthReduce.cpp
index 1444671e6e..e7a1d6eb04 100644
--- a/llvm/lib/Transforms/Scalar/LoopStrengthReduce.cpp
+++ b/llvm/lib/Transforms/Scalar/LoopStrengthReduce.cpp
@@ -1927,13 +1927,11 @@ static InstructionCost getScalingFactorCost(const TargetTransformInfo &TTI,
       FixedMax = (F.BaseOffset + LU.MaxOffset).getFixedValue();
     }
     InstructionCost ScaleCostMinOffset = TTI.getScalingFactorCost(
-        LU.AccessTy.MemTy, F.BaseGV,
-        StackOffset::get(FixedMin, ScalableMin), F.HasBaseReg,
-        F.Scale, LU.AccessTy.AddrSpace);
+        LU.AccessTy.MemTy, F.BaseGV, StackOffset::get(FixedMin, ScalableMin),
+        F.HasBaseReg, F.Scale, LU.AccessTy.AddrSpace);
     InstructionCost ScaleCostMaxOffset = TTI.getScalingFactorCost(
-        LU.AccessTy.MemTy, F.BaseGV,
-        StackOffset::get(FixedMax, ScalableMax), F.HasBaseReg,
-        F.Scale, LU.AccessTy.AddrSpace);
+        LU.AccessTy.MemTy, F.BaseGV, StackOffset::get(FixedMax, ScalableMax),
+        F.HasBaseReg, F.Scale, LU.AccessTy.AddrSpace);
 
     assert(ScaleCostMinOffset.isValid() && ScaleCostMaxOffset.isValid() &&
            "Legal addressing mode has an illegal cost!");

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https://github.com/llvm/llvm-project/pull/88124