From: Chris Lattner <clattner@nondot.org>
Date: Sat, 16 Oct 2021 20:01:13 +0000 (-0700)
Subject: [Builders.h] Silence a warning by adding a cast.
X-Git-Tag: upstream/15.0.7~28434
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=ecbee4804d44c0afdf97fe59e8221c30cbbf3ae7;p=platform%2Fupstream%2Fllvm.git

[Builders.h] Silence a warning by adding a cast.

The no-result version of createOrFold calls 'tryFold' but
ignores the result since it doesn't matter what it produced.
Explicitly cast to void to silence this warning:

../llvm/mlir/include/mlir/IR/Builders.h:454:5: warning: ignoring return value of function declared with 'nodiscard' attribute [-Wunused-result]
    tryFold(op.getOperation(), unused);
    ^~~~~~~ ~~~~~~~~~~~~~~~~~~~~~~~~~

Differential Revision: https://reviews.llvm.org/D111951
---

diff --git a/mlir/include/mlir/IR/Builders.h b/mlir/include/mlir/IR/Builders.h
index e87796e..6a50bc7 100644
--- a/mlir/include/mlir/IR/Builders.h
+++ b/mlir/include/mlir/IR/Builders.h
@@ -451,7 +451,7 @@ public:
   createOrFold(Location location, Args &&...args) {
     auto op = create<OpTy>(location, std::forward<Args>(args)...);
     SmallVector<Value, 0> unused;
-    tryFold(op.getOperation(), unused);
+    (void)tryFold(op.getOperation(), unused);
 
     // Folding cannot remove a zero-result operation, so for convenience we
     // continue to return it.