[llvm] [LV] Directly emit predicated select for reduction in VPlan. (PR #201740)

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Mon Jun 8 22:46:07 PDT 2026


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``````````bash
git-clang-format --diff origin/main HEAD --extensions h,cpp -- llvm/lib/Transforms/Vectorize/VPlan.h llvm/lib/Transforms/Vectorize/VPlanConstruction.cpp llvm/lib/Transforms/Vectorize/VPlanRecipes.cpp llvm/lib/Transforms/Vectorize/VPlanTransforms.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/Vectorize/VPlanTransforms.cpp b/llvm/lib/Transforms/Vectorize/VPlanTransforms.cpp
index d21a954b2..5e3061ce3 100644
--- a/llvm/lib/Transforms/Vectorize/VPlanTransforms.cpp
+++ b/llvm/lib/Transforms/Vectorize/VPlanTransforms.cpp
@@ -4648,9 +4648,9 @@ tryToMatchAndCreateExtendedReduction(VPReductionRecipe *Red, VPCostContext &Ctx,
              "VecOp of predicated reduction must be select");
       VPBuilder Builder(Cast);
       FastMathFlags FMFs =
-        Red->getChainOp()->getScalarType()->isFloatingPointTy()
-        ? Red->getFastMathFlagsOrNone()
-        : FastMathFlags();
+          Red->getChainOp()->getScalarType()->isFloatingPointTy()
+              ? Red->getFastMathFlagsOrNone()
+              : FastMathFlags();
       auto *NewSelect =
           Builder.createSelect(HeaderMask, Cast->getOperand(0),
                                new VPIRValue(getRecurrenceIdentity(

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https://github.com/llvm/llvm-project/pull/201740


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