[mlir] Fix -Wunused-variable in DebugTranslation.cpp (NFC)

DamonFool · DamonFool · commit 83afcbf5f39b · 2024-03-16T07:22:34.000+08:00
llvm-project/mlir/lib/Target/LLVMIR/DebugTranslation.cpp:226:10:
error: unused variable '[iter, inserted]' [-Werror,-Wunused-variable]
    auto [iter, inserted] =
         ^
1 error generated.
diff --git a/mlir/lib/Target/LLVMIR/DebugTranslation.cpp b/mlir/lib/Target/LLVMIR/DebugTranslation.cpp
@@ -223,7 +223,7 @@ DebugTranslation::translateRecursive(DIRecursiveTypeAttrInterface attr) {
   }
 
   auto setRecursivePlaceholder = [&](llvm::DIType *placeholder) {
-    auto [iter, inserted] =
+    [[maybe_unused]] auto [iter, inserted] =
         recursiveTypeMap.try_emplace(recursiveId, placeholder);
     assert(inserted && "illegal reuse of recursive id");
   };

Original file line number	Diff line number	Diff line change
`@@ -223,7 +223,7 @@ DebugTranslation::translateRecursive(DIRecursiveTypeAttrInterface attr) {`
`223`	`223`	`}`
`224`	`224`
`225`	`225`	`auto setRecursivePlaceholder = [&](llvm::DIType *placeholder) {`
`226`		`- auto [iter, inserted] =`
	`226`	`+ [[maybe_unused]] auto [iter, inserted] =`
`227`	`227`	`recursiveTypeMap.try_emplace(recursiveId, placeholder);`
`228`	`228`	`assert(inserted && "illegal reuse of recursive id");`
`229`	`229`	`};`