fix a memory leak

Author: VyacheslavLevytskyy

llvm/lib/Target/SPIRV/SPIRVAPI.cpp

@@ -134,9 +134,8 @@ SPIRVTranslateModule(Module *M, std::string &SpirvObj, std::string &ErrMsg,
   TargetOptions Options;
   std::optional<Reloc::Model> RM;
   std::optional<CodeModel::Model> CM;
-  std::unique_ptr<TargetMachine> Target =
-      std::unique_ptr<TargetMachine>(TheTarget->createTargetMachine(
-          TargetTriple.getTriple(), "", "", Options, RM, CM, OLevel));
+  std::unique_ptr<TargetMachine> Target(TheTarget->createTargetMachine(
+      TargetTriple.getTriple(), "", "", Options, RM, CM, OLevel));
   if (!Target) {
     ErrMsg = "Could not allocate target machine!";
     return false;
@@ -158,10 +157,10 @@ SPIRVTranslateModule(Module *M, std::string &SpirvObj, std::string &ErrMsg,
   TargetLibraryInfoImpl TLII(Triple(M->getTargetTriple()));
   legacy::PassManager PM;
   PM.add(new TargetLibraryInfoWrapperPass(TLII));
-  MachineModuleInfoWrapperPass *MMIWP =
-      new MachineModuleInfoWrapperPass(Target.get());
+  std::unique_ptr<MachineModuleInfoWrapperPass> MMIWP(
+      new MachineModuleInfoWrapperPass(Target.get()));
   const_cast<TargetLoweringObjectFile *>(Target->getObjFileLowering())
-      ->Initialize(MMIWP->getMMI().getContext(), *Target);
+      ->Initialize(MMIWP.get()->getMMI().getContext(), *Target);
 
   SmallString<4096> OutBuffer;
   raw_svector_ostream OutStream(OutBuffer);