[llvm] Mark maybe_unused variable (PR #133069)

[via llvm-commits]

llvmbot wrote:


<!--LLVM PR SUMMARY COMMENT-->

@llvm/pr-subscribers-llvm-transforms

Author: Walter Lee (googlewalt)

<details>
<summary>Changes</summary>

... to avoid -Wunused-variable warnings/errors when assertions are off.

---
Full diff: https://github.com/llvm/llvm-project/pull/133069.diff


1 Files Affected:

- (modified) llvm/lib/Transforms/Vectorize/VPlanRecipes.cpp (+1-1) 


``````````diff
diff --git a/llvm/lib/Transforms/Vectorize/VPlanRecipes.cpp b/llvm/lib/Transforms/Vectorize/VPlanRecipes.cpp
index efa238228f6c3..7db599ae51e16 100644
--- a/llvm/lib/Transforms/Vectorize/VPlanRecipes.cpp
+++ b/llvm/lib/Transforms/Vectorize/VPlanRecipes.cpp
@@ -619,7 +619,7 @@ Value *VPInstruction::generate(VPTransformState &State) {
     auto *PhiR = cast<VPReductionPHIRecipe>(getOperand(0));
     // Get its reduction variable descriptor.
     const RecurrenceDescriptor &RdxDesc = PhiR->getRecurrenceDescriptor();
-    RecurKind RK = RdxDesc.getRecurrenceKind();
+    [[maybe_unused]] RecurKind RK = RdxDesc.getRecurrenceKind();
     assert(RecurrenceDescriptor::isFindLastIVRecurrenceKind(RK) &&
            "Unexpected reduction kind");
     assert(!PhiR->isInLoop() &&

``````````

</details>


https://github.com/llvm/llvm-project/pull/133069