[mlir] Fix -Wunused-variable in ROCDL/Target.cpp (NFC)

DamonFool · DamonFool · commit ac798eaa96c0 · 2023-11-04T08:15:37.000+08:00
/llvm-project/mlir/lib/Target/LLVM/ROCDL/Target.cpp:181:40: error: unused variable 'targetMachine' [-Werror,-Wunused-variable]
  std::optional&lt;llvm::TargetMachine *&gt; targetMachine =
                                       ^
1 error generated.
diff --git a/mlir/lib/Target/LLVM/ROCDL/Target.cpp b/mlir/lib/Target/LLVM/ROCDL/Target.cpp
@@ -178,7 +178,7 @@ LogicalResult SerializeGPUModuleBase::handleBitcodeFile(llvm::Module &module) {
 }
 
 void SerializeGPUModuleBase::handleModulePreLink(llvm::Module &module) {
-  std::optional<llvm::TargetMachine *> targetMachine =
+  [[maybe_unused]] std::optional<llvm::TargetMachine *> targetMachine =
       getOrCreateTargetMachine();
   assert(targetMachine && "expect a TargetMachine");
   addControlVariables(module, target.hasWave64(), target.hasDaz(),

Original file line number	Diff line number	Diff line change
`@@ -178,7 +178,7 @@ LogicalResult SerializeGPUModuleBase::handleBitcodeFile(llvm::Module &module) {`
`178`	`178`	`}`
`179`	`179`
`180`	`180`	`void SerializeGPUModuleBase::handleModulePreLink(llvm::Module &module) {`
`181`		`- std::optional<llvm::TargetMachine *> targetMachine =`
	`181`	`+ [[maybe_unused]] std::optional<llvm::TargetMachine *> targetMachine =`
`182`	`182`	`getOrCreateTargetMachine();`
`183`	`183`	`assert(targetMachine && "expect a TargetMachine");`
`184`	`184`	`addControlVariables(module, target.hasWave64(), target.hasDaz(),`