From c50de57feb2b824d789fe3bc4e0d24c5bfc266ea Mon Sep 17 00:00:00 2001
From: Kazu Hirata <kazu@google.com>
Date: Thu, 21 Dec 2023 10:30:36 -0800
Subject: [flang] Fix a warning

This patch fixes:

  flang/lib/Optimizer/Transforms/StackArrays.cpp:452:7: error:
  ignoring return value of function declared with 'nodiscard'
  attribute [-Werror,-Wunused-result]
---
 flang/lib/Optimizer/Transforms/StackArrays.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/flang/lib/Optimizer/Transforms/StackArrays.cpp b/flang/lib/Optimizer/Transforms/StackArrays.cpp
index b51e2aa..1c213abef 100644
--- a/flang/lib/Optimizer/Transforms/StackArrays.cpp
+++ b/flang/lib/Optimizer/Transforms/StackArrays.cpp
@@ -449,7 +449,7 @@ StackArraysAnalysisWrapper::analyseFunction(mlir::Operation *func) {
     const LatticePoint *lattice = solver.lookupState<LatticePoint>(op);
     // there will be no lattice for an unreachable block
     if (lattice)
-      point.join(*lattice);
+      (void)point.join(*lattice);
   };
   func->walk([&](mlir::func::ReturnOp child) { joinOperationLattice(child); });
   func->walk([&](fir::UnreachableOp child) { joinOperationLattice(child); });
-- 
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