[mlir] Fix a warning

This patch fixes:

  mlir/lib/Dialect/Linalg/Transforms/HoistPadding.cpp:37:13: error:
  unused function 'debugPrintLoopInShortForm'
  [-Werror,-Wunused-function]

diff --git a/mlir/lib/Dialect/Linalg/Transforms/HoistPadding.cpp b/mlir/lib/Dialect/Linalg/Transforms/HoistPadding.cpp
index 6b56565..614efca 100644 (file)
--- a/mlir/lib/Dialect/Linalg/Transforms/HoistPadding.cpp
+++ b/mlir/lib/Dialect/Linalg/Transforms/HoistPadding.cpp
@@ -34,6 +34,7 @@ using llvm::dbgs;
 using namespace mlir;
 using namespace mlir::linalg;
 
+#ifndef NDEBUG
 static bool debugPrintLoopInShortForm(Operation *op) {
   AsmState state(op->getParentOfType<func::FuncOp>());
   (void)state;
@@ -44,6 +45,7 @@ static bool debugPrintLoopInShortForm(Operation *op) {
   }
   return false;
 }
+#endif
 
 static void debugPrintBackwardSlice(SetVector<Operation *> &backwardSlice) {
   LLVM_DEBUG(llvm::interleaveComma(backwardSlice, DBGS() << "--backwardSlice:",