[tools] fix Wdangling-assignment-gsl (llvm#8407)

Author: makslevental

tools/arcilator/arcilator.cpp

@@ -461,9 +461,11 @@ static LogicalResult processBuffer(
 
     mlir::ExecutionEngineOptions engineOptions;
     engineOptions.jitCodeGenOptLevel = llvm::CodeGenOptLevel::Aggressive;
-    engineOptions.transformer = mlir::makeOptimizingTransformer(
-        /*optLevel=*/3, /*sizeLevel=*/0,
-        /*targetMachine=*/nullptr);
+    std::function<llvm::Error(llvm::Module *)> transformer =
+        mlir::makeOptimizingTransformer(
+            /*optLevel=*/3, /*sizeLevel=*/0,
+            /*targetMachine=*/nullptr);
+    engineOptions.transformer = transformer;
     engineOptions.sharedLibPaths = sharedLibraries;
 
     auto executionEngine =

tools/circt-bmc/circt-bmc.cpp

@@ -242,6 +242,9 @@ static LogicalResult executeBMC(MLIRContext &context) {
   };
 
   std::unique_ptr<mlir::ExecutionEngine> engine;
+  std::function<llvm::Error(llvm::Module *)> transformer =
+      mlir::makeOptimizingTransformer(
+          /*optLevel*/ 3, /*sizeLevel=*/0, /*targetMachine=*/nullptr);
   {
     auto timer = ts.nest("Setting up the JIT");
     auto entryPoint =
@@ -264,8 +267,7 @@ static LogicalResult executeBMC(MLIRContext &context) {
     SmallVector<StringRef, 4> sharedLibraries(sharedLibs.begin(),
                                               sharedLibs.end());
     mlir::ExecutionEngineOptions engineOptions;
-    engineOptions.transformer = mlir::makeOptimizingTransformer(
-        /*optLevel*/ 3, /*sizeLevel=*/0, /*targetMachine=*/nullptr);
+    engineOptions.transformer = transformer;
     engineOptions.jitCodeGenOptLevel = llvm::CodeGenOptLevel::Aggressive;
     engineOptions.sharedLibPaths = sharedLibraries;
     engineOptions.enableObjectDump = true;

tools/circt-lec/circt-lec.cpp

@@ -282,6 +282,9 @@ static LogicalResult executeLEC(MLIRContext &context) {
   };
 
   std::unique_ptr<mlir::ExecutionEngine> engine;
+  std::function<llvm::Error(llvm::Module *)> transformer =
+      mlir::makeOptimizingTransformer(
+          /*optLevel*/ 3, /*sizeLevel=*/0, /*targetMachine=*/nullptr);
   {
     auto timer = ts.nest("Setting up the JIT");
     auto entryPoint = dyn_cast_or_null<LLVM::LLVMFuncOp>(
@@ -304,8 +307,7 @@ static LogicalResult executeLEC(MLIRContext &context) {
     SmallVector<StringRef, 4> sharedLibraries(sharedLibs.begin(),
                                               sharedLibs.end());
     mlir::ExecutionEngineOptions engineOptions;
-    engineOptions.transformer = mlir::makeOptimizingTransformer(
-        /*optLevel*/ 3, /*sizeLevel=*/0, /*targetMachine=*/nullptr);
+    engineOptions.transformer = transformer;
     engineOptions.jitCodeGenOptLevel = llvm::CodeGenOptLevel::Aggressive;
     engineOptions.sharedLibPaths = sharedLibraries;
     engineOptions.enableObjectDump = true;