[MLIR] Add [[maybe_unused]] to variables on used in assert

[WillFroom]

Add [[maybe_unused]] to suppresses warnings when -NDEBUG is enabled

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@llvm/pr-subscribers-mlir-vector

@llvm/pr-subscribers-mlir

Author: Will Froom (WillFroom)

Changes

Add [[maybe_unused]] to suppresses warnings when -NDEBUG is enabled

---

Full diff: https://github.com/llvm/llvm-project/pull/123037.diff

1 Files Affected:

• (modified) mlir/lib/Dialect/Vector/Transforms/VectorEmulateNarrowType.cpp (+2-2)

diff --git a/mlir/lib/Dialect/Vector/Transforms/VectorEmulateNarrowType.cpp b/mlir/lib/Dialect/Vector/Transforms/VectorEmulateNarrowType.cpp
index a674a590091815..95064083b21d44 100644
--- a/mlir/lib/Dialect/Vector/Transforms/VectorEmulateNarrowType.cpp
+++ b/mlir/lib/Dialect/Vector/Transforms/VectorEmulateNarrowType.cpp
@@ -1291,7 +1291,7 @@ using ExtractNBitsFn =
 /// bitwise ops to avoid leaving LLVM to scramble with peephole optimizations.
 static Value rewriteI4ToI8Ext(PatternRewriter &rewriter, Location loc,
                               Value srcValue, const ExtractNBitsFn &extFn) {
-  auto srcVecType = cast<VectorType>(srcValue.getType());
+  [[maybe_unused]] auto srcVecType = cast<VectorType>(srcValue.getType());
   assert(srcVecType.getElementType().isSignlessInteger(4) &&
          "Expected i4 type");
 
@@ -1311,7 +1311,7 @@ static Value rewriteI4ToI8Ext(PatternRewriter &rewriter, Location loc,
 /// bitwise ops to avoid leaving LLVM to scramble with peephole optimizations.
 static Value rewriteI2ToI8Ext(PatternRewriter &rewriter, Location loc,
                               Value srcValue, const ExtractNBitsFn &extFn) {
-  VectorType srcVecType = cast<VectorType>(srcValue.getType());
+  [[maybe_unused]] VectorType srcVecType = cast<VectorType>(srcValue.getType());
   assert(srcVecType.getElementType().isSignlessInteger(2) &&
          "Expected i2 type");
 

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