MCAsmStreamer: Replace the MCInstPrinter * parameter with unique_ptr

MaskRay · web-flow · commit c04d9d57ee4c · 2025-04-10T21:25:35.000-07:00
... to clarify ownership, aligning with other parameters. Using `std::unique_ptr` encourages users to manage `createMCInstPrinter` with a unique_ptr instead of a raw pointer, reducing the risk of memory leaks. * llvm-mc: fix a leak and update llvm/test/tools/llvm-mc/disassembler-options.test * #121078 copied the llvm-mc code to CodeGenTargetMachineImpl and made the same mistake. Fixed by 2b8cc65 Using unique_ptr requires #include MCInstPrinter.h in a few translation units. * Delete a createAsmStreamer overload I deprecated in 2024 * SystemZMCTargetDesc.cpp: rename to `createSystemZAsmStreamer` to fix an overload conflict. Pull Request: #135128
diff --git a/bolt/lib/Passes/AsmDump.cpp b/bolt/lib/Passes/AsmDump.cpp
@@ -134,13 +134,14 @@ void dumpFunction(const BinaryFunction &BF) {
   std::unique_ptr<MCAsmBackend> MAB(
       BC.TheTarget->createMCAsmBackend(*BC.STI, *BC.MRI, MCTargetOptions()));
   int AsmPrinterVariant = BC.AsmInfo->getAssemblerDialect();
-  MCInstPrinter *InstructionPrinter(BC.TheTarget->createMCInstPrinter(
-      *BC.TheTriple, AsmPrinterVariant, *BC.AsmInfo, *BC.MII, *BC.MRI));
+  std::unique_ptr<MCInstPrinter> InstructionPrinter(
+      BC.TheTarget->createMCInstPrinter(*BC.TheTriple, AsmPrinterVariant,
+                                        *BC.AsmInfo, *BC.MII, *BC.MRI));
   auto FOut = std::make_unique<formatted_raw_ostream>(OS);
   FOut->SetUnbuffered();
-  std::unique_ptr<MCStreamer> AsmStreamer(
-      createAsmStreamer(*LocalCtx, std::move(FOut), InstructionPrinter,
-                        std::move(MCEInstance.MCE), std::move(MAB)));
+  std::unique_ptr<MCStreamer> AsmStreamer(createAsmStreamer(
+      *LocalCtx, std::move(FOut), std::move(InstructionPrinter),
+      std::move(MCEInstance.MCE), std::move(MAB)));
   AsmStreamer->initSections(true, *BC.STI);
   std::unique_ptr<TargetMachine> TM(BC.TheTarget->createTargetMachine(
       *BC.TheTriple, "", "", TargetOptions(), std::nullopt));
diff --git a/clang/tools/driver/cc1as_main.cpp b/clang/tools/driver/cc1as_main.cpp
@@ -26,6 +26,7 @@
 #include "llvm/MC/MCAsmInfo.h"
 #include "llvm/MC/MCCodeEmitter.h"
 #include "llvm/MC/MCContext.h"
+#include "llvm/MC/MCInstPrinter.h"
 #include "llvm/MC/MCInstrInfo.h"
 #include "llvm/MC/MCObjectFileInfo.h"
 #include "llvm/MC/MCObjectWriter.h"
@@ -541,8 +542,8 @@ static bool ExecuteAssemblerImpl(AssemblerInvocation &Opts,
 
   // FIXME: There is a bit of code duplication with addPassesToEmitFile.
   if (Opts.OutputType == AssemblerInvocation::FT_Asm) {
-    MCInstPrinter *IP = TheTarget->createMCInstPrinter(
-        llvm::Triple(Opts.Triple), Opts.OutputAsmVariant, *MAI, *MCII, *MRI);
+    std::unique_ptr<MCInstPrinter> IP(TheTarget->createMCInstPrinter(
+        llvm::Triple(Opts.Triple), Opts.OutputAsmVariant, *MAI, *MCII, *MRI));
 
     std::unique_ptr<MCCodeEmitter> CE;
     if (Opts.ShowEncoding)
@@ -551,7 +552,7 @@ static bool ExecuteAssemblerImpl(AssemblerInvocation &Opts,
         TheTarget->createMCAsmBackend(*STI, *MRI, MCOptions));
 
     auto FOut = std::make_unique<formatted_raw_ostream>(*Out);
-    Str.reset(TheTarget->createAsmStreamer(Ctx, std::move(FOut), IP,
+    Str.reset(TheTarget->createAsmStreamer(Ctx, std::move(FOut), std::move(IP),
                                            std::move(CE), std::move(MAB)));
   } else if (Opts.OutputType == AssemblerInvocation::FT_Null) {
     Str.reset(createNullStreamer(Ctx));
diff --git a/llvm/include/llvm/DWARFLinker/Classic/DWARFStreamer.h b/llvm/include/llvm/DWARFLinker/Classic/DWARFStreamer.h
@@ -286,7 +286,6 @@ class DwarfStreamer : public DwarfEmitter {
   MCAsmBackend *MAB; // Owned by MCStreamer
   std::unique_ptr<MCInstrInfo> MII;
   std::unique_ptr<MCSubtargetInfo> MSTI;
-  MCInstPrinter *MIP; // Owned by AsmPrinter
   MCCodeEmitter *MCE; // Owned by MCStreamer
   MCStreamer *MS;     // Owned by AsmPrinter
   std::unique_ptr<TargetMachine> TM;
diff --git a/llvm/include/llvm/MC/TargetRegistry.h b/llvm/include/llvm/MC/TargetRegistry.h
@@ -84,10 +84,11 @@ MCStreamer *createNullStreamer(MCContext &Ctx);
 ///
 /// \param ShowInst - Whether to show the MCInst representation inline with
 /// the assembly.
-MCStreamer *
-createAsmStreamer(MCContext &Ctx, std::unique_ptr<formatted_raw_ostream> OS,
-                  MCInstPrinter *InstPrint, std::unique_ptr<MCCodeEmitter> &&CE,
-                  std::unique_ptr<MCAsmBackend> &&TAB);
+MCStreamer *createAsmStreamer(MCContext &Ctx,
+                              std::unique_ptr<formatted_raw_ostream> OS,
+                              std::unique_ptr<MCInstPrinter> InstPrint,
+                              std::unique_ptr<MCCodeEmitter> CE,
+                              std::unique_ptr<MCAsmBackend> TAB);
 
 MCStreamer *createELFStreamer(MCContext &Ctx,
                               std::unique_ptr<MCAsmBackend> &&TAB,
@@ -208,10 +209,10 @@ class Target {
   using AsmTargetStreamerCtorTy =
       MCTargetStreamer *(*)(MCStreamer &S, formatted_raw_ostream &OS,
                             MCInstPrinter *InstPrint);
-  using AsmStreamerCtorTy =
-      MCStreamer *(*)(MCContext &Ctx, std::unique_ptr<formatted_raw_ostream> OS,
-                      MCInstPrinter *IP, std::unique_ptr<MCCodeEmitter> CE,
-                      std::unique_ptr<MCAsmBackend> TAB);
+  using AsmStreamerCtorTy = MCStreamer
+      *(*)(MCContext & Ctx, std::unique_ptr<formatted_raw_ostream> OS,
+           std::unique_ptr<MCInstPrinter> IP, std::unique_ptr<MCCodeEmitter> CE,
+           std::unique_ptr<MCAsmBackend> TAB);
   using ObjectTargetStreamerCtorTy =
       MCTargetStreamer *(*)(MCStreamer &S, const MCSubtargetInfo &STI);
   using MCRelocationInfoCtorTy = MCRelocationInfo *(*)(const Triple &TT,
@@ -552,7 +553,7 @@ class Target {
 
   MCStreamer *createAsmStreamer(MCContext &Ctx,
                                 std::unique_ptr<formatted_raw_ostream> OS,
-                                MCInstPrinter *IP,
+                                std::unique_ptr<MCInstPrinter> IP,
                                 std::unique_ptr<MCCodeEmitter> CE,
                                 std::unique_ptr<MCAsmBackend> TAB) const;
 
diff --git a/llvm/lib/CodeGen/CodeGenTargetMachineImpl.cpp b/llvm/lib/CodeGen/CodeGenTargetMachineImpl.cpp
@@ -162,16 +162,13 @@ CodeGenTargetMachineImpl::createMCStreamer(raw_pwrite_stream &Out,
 
   switch (FileType) {
   case CodeGenFileType::AssemblyFile: {
-    MCInstPrinter *InstPrinter = getTarget().createMCInstPrinter(
+    std::unique_ptr<MCInstPrinter> InstPrinter(getTarget().createMCInstPrinter(
         getTargetTriple(),
         Options.MCOptions.OutputAsmVariant.value_or(MAI.getAssemblerDialect()),
-        MAI, MII, MRI);
-    for (StringRef Opt : Options.MCOptions.InstPrinterOptions) {
-      if (!InstPrinter->applyTargetSpecificCLOption(Opt)) {
-        delete InstPrinter;
+        MAI, MII, MRI));
+    for (StringRef Opt : Options.MCOptions.InstPrinterOptions)
+      if (!InstPrinter->applyTargetSpecificCLOption(Opt))
         return createStringError("invalid InstPrinter option '" + Opt + "'");
-      }
-    }
 
     // Create a code emitter if asked to show the encoding.
     std::unique_ptr<MCCodeEmitter> MCE;
@@ -182,7 +179,8 @@ CodeGenTargetMachineImpl::createMCStreamer(raw_pwrite_stream &Out,
         getTarget().createMCAsmBackend(STI, MRI, Options.MCOptions));
     auto FOut = std::make_unique<formatted_raw_ostream>(Out);
     MCStreamer *S = getTarget().createAsmStreamer(
-        Context, std::move(FOut), InstPrinter, std::move(MCE), std::move(MAB));
+        Context, std::move(FOut), std::move(InstPrinter), std::move(MCE),
+        std::move(MAB));
     AsmStreamer.reset(S);
     break;
   }
diff --git a/llvm/lib/DWARFLinker/Classic/DWARFStreamer.cpp b/llvm/lib/DWARFLinker/Classic/DWARFStreamer.cpp
@@ -14,6 +14,7 @@
 #include "llvm/MC/MCAsmBackend.h"
 #include "llvm/MC/MCCodeEmitter.h"
 #include "llvm/MC/MCDwarf.h"
+#include "llvm/MC/MCInstPrinter.h"
 #include "llvm/MC/MCObjectWriter.h"
 #include "llvm/MC/MCSection.h"
 #include "llvm/MC/MCStreamer.h"
@@ -100,10 +101,10 @@ Error DwarfStreamer::init(Triple TheTriple,
 
   switch (OutFileType) {
   case DWARFLinker::OutputFileType::Assembly: {
-    MIP = TheTarget->createMCInstPrinter(TheTriple, MAI->getAssemblerDialect(),
-                                         *MAI, *MII, *MRI);
+    std::unique_ptr<MCInstPrinter> MIP(TheTarget->createMCInstPrinter(
+        TheTriple, MAI->getAssemblerDialect(), *MAI, *MII, *MRI));
     MS = TheTarget->createAsmStreamer(
-        *MC, std::make_unique<formatted_raw_ostream>(OutFile), MIP,
+        *MC, std::make_unique<formatted_raw_ostream>(OutFile), std::move(MIP),
         std::unique_ptr<MCCodeEmitter>(MCE),
         std::unique_ptr<MCAsmBackend>(MAB));
     break;
diff --git a/llvm/lib/DWARFLinker/Parallel/DWARFEmitterImpl.cpp b/llvm/lib/DWARFLinker/Parallel/DWARFEmitterImpl.cpp
@@ -10,6 +10,7 @@
 #include "DWARFLinkerCompileUnit.h"
 #include "llvm/MC/MCAsmBackend.h"
 #include "llvm/MC/MCCodeEmitter.h"
+#include "llvm/MC/MCInstPrinter.h"
 #include "llvm/MC/MCObjectWriter.h"
 #include "llvm/MC/MCSubtargetInfo.h"
 #include "llvm/MC/MCTargetOptions.h"
@@ -79,10 +80,10 @@ Error DwarfEmitterImpl::init(Triple TheTriple,
 
   switch (OutFileType) {
   case DWARFLinker::OutputFileType::Assembly: {
-    MIP = TheTarget->createMCInstPrinter(TheTriple, MAI->getAssemblerDialect(),
-                                         *MAI, *MII, *MRI);
+    std::unique_ptr<MCInstPrinter> MIP(TheTarget->createMCInstPrinter(
+        TheTriple, MAI->getAssemblerDialect(), *MAI, *MII, *MRI));
     MS = TheTarget->createAsmStreamer(
-        *MC, std::make_unique<formatted_raw_ostream>(OutFile), MIP,
+        *MC, std::make_unique<formatted_raw_ostream>(OutFile), std::move(MIP),
         std::unique_ptr<MCCodeEmitter>(MCE),
         std::unique_ptr<MCAsmBackend>(MAB));
     break;
diff --git a/llvm/lib/DWARFLinker/Parallel/DWARFEmitterImpl.h b/llvm/lib/DWARFLinker/Parallel/DWARFEmitterImpl.h
@@ -16,6 +16,7 @@
 #include "llvm/DWARFLinker/Parallel/DWARFLinker.h"
 #include "llvm/MC/MCAsmInfo.h"
 #include "llvm/MC/MCContext.h"
+#include "llvm/MC/MCInstPrinter.h"
 #include "llvm/MC/MCInstrInfo.h"
 #include "llvm/MC/MCObjectFileInfo.h"
 #include "llvm/MC/MCRegisterInfo.h"
@@ -110,7 +111,7 @@ class DwarfEmitterImpl {
   MCAsmBackend *MAB; // Owned by MCStreamer
   std::unique_ptr<MCInstrInfo> MII;
   std::unique_ptr<MCSubtargetInfo> MSTI;
-  MCInstPrinter *MIP; // Owned by AsmPrinter
+  std::unique_ptr<MCInstPrinter> MIP; // Owned by AsmPrinter
   MCCodeEmitter *MCE; // Owned by MCStreamer
   MCStreamer *MS;     // Owned by AsmPrinter
   std::unique_ptr<TargetMachine> TM;
diff --git a/llvm/lib/MC/MCAsmStreamer.cpp b/llvm/lib/MC/MCAsmStreamer.cpp
@@ -74,10 +74,11 @@ class MCAsmStreamer final : public MCStreamer {
 
 public:
   MCAsmStreamer(MCContext &Context, std::unique_ptr<formatted_raw_ostream> os,
-                MCInstPrinter *printer, std::unique_ptr<MCCodeEmitter> emitter,
+                std::unique_ptr<MCInstPrinter> printer,
+                std::unique_ptr<MCCodeEmitter> emitter,
                 std::unique_ptr<MCAsmBackend> asmbackend)
       : MCStreamer(Context), OSOwner(std::move(os)), OS(*OSOwner),
-        MAI(Context.getAsmInfo()), InstPrinter(printer),
+        MAI(Context.getAsmInfo()), InstPrinter(std::move(printer)),
         Assembler(std::make_unique<MCAssembler>(
             Context, std::move(asmbackend), std::move(emitter),
             (asmbackend) ? asmbackend->createObjectWriter(NullStream)
@@ -2649,9 +2650,9 @@ void MCAsmStreamer::emitDwarfAdvanceLineAddr(int64_t LineDelta,
 
 MCStreamer *llvm::createAsmStreamer(MCContext &Context,
                                     std::unique_ptr<formatted_raw_ostream> OS,
-                                    MCInstPrinter *IP,
-                                    std::unique_ptr<MCCodeEmitter> &&CE,
-                                    std::unique_ptr<MCAsmBackend> &&MAB) {
-  return new MCAsmStreamer(Context, std::move(OS), IP, std::move(CE),
+                                    std::unique_ptr<MCInstPrinter> IP,
+                                    std::unique_ptr<MCCodeEmitter> CE,
+                                    std::unique_ptr<MCAsmBackend> MAB) {
+  return new MCAsmStreamer(Context, std::move(OS), std::move(IP), std::move(CE),
                            std::move(MAB));
 }
diff --git a/llvm/lib/MC/TargetRegistry.cpp b/llvm/lib/MC/TargetRegistry.cpp
@@ -12,6 +12,7 @@
 #include "llvm/MC/MCAsmBackend.h"
 #include "llvm/MC/MCCodeEmitter.h"
 #include "llvm/MC/MCContext.h"
+#include "llvm/MC/MCInstPrinter.h"
 #include "llvm/MC/MCObjectStreamer.h"
 #include "llvm/MC/MCObjectWriter.h"
 #include "llvm/Support/raw_ostream.h"
@@ -79,19 +80,20 @@ MCStreamer *Target::createMCObjectStreamer(
 
 MCStreamer *Target::createAsmStreamer(MCContext &Ctx,
                                       std::unique_ptr<formatted_raw_ostream> OS,
-                                      MCInstPrinter *IP,
+                                      std::unique_ptr<MCInstPrinter> IP,
                                       std::unique_ptr<MCCodeEmitter> CE,
                                       std::unique_ptr<MCAsmBackend> TAB) const {
+  MCInstPrinter *Printer = IP.get();
   formatted_raw_ostream &OSRef = *OS;
   MCStreamer *S;
   if (AsmStreamerCtorFn)
-    S = AsmStreamerCtorFn(Ctx, std::move(OS), IP, std::move(CE),
+    S = AsmStreamerCtorFn(Ctx, std::move(OS), std::move(IP), std::move(CE),
                           std::move(TAB));
   else
-    S = llvm::createAsmStreamer(Ctx, std::move(OS), IP, std::move(CE),
-                                std::move(TAB));
+    S = llvm::createAsmStreamer(Ctx, std::move(OS), std::move(IP),
+                                std::move(CE), std::move(TAB));
 
-  createAsmTargetStreamer(*S, OSRef, IP);
+  createAsmTargetStreamer(*S, OSRef, Printer);
   return S;
 }
 
diff --git a/llvm/lib/Target/SystemZ/MCTargetDesc/SystemZHLASMAsmStreamer.h b/llvm/lib/Target/SystemZ/MCTargetDesc/SystemZHLASMAsmStreamer.h
@@ -46,11 +46,11 @@ class SystemZHLASMAsmStreamer final : public MCStreamer {
 public:
   SystemZHLASMAsmStreamer(MCContext &Context,
                           std::unique_ptr<formatted_raw_ostream> os,
-                          MCInstPrinter *printer,
+                          std::unique_ptr<MCInstPrinter> printer,
                           std::unique_ptr<MCCodeEmitter> emitter,
                           std::unique_ptr<MCAsmBackend> asmbackend)
       : MCStreamer(Context), FOSOwner(std::move(os)), FOS(*FOSOwner), OS(Str),
-        MAI(Context.getAsmInfo()), InstPrinter(printer),
+        MAI(Context.getAsmInfo()), InstPrinter(std::move(printer)),
         Assembler(std::make_unique<MCAssembler>(
             Context, std::move(asmbackend), std::move(emitter),
             (asmbackend) ? asmbackend->createObjectWriter(NullStream)
diff --git a/llvm/lib/Target/SystemZ/MCTargetDesc/SystemZMCTargetDesc.cpp b/llvm/lib/Target/SystemZ/MCTargetDesc/SystemZMCTargetDesc.cpp
@@ -192,19 +192,18 @@ static MCTargetStreamer *createAsmTargetStreamer(MCStreamer &S,
     return new SystemZTargetGNUStreamer(S, OS);
 }
 
-static MCStreamer *createAsmStreamer(MCContext &Ctx,
-                                     std::unique_ptr<formatted_raw_ostream> OS,
-                                     MCInstPrinter *IP,
-                                     std::unique_ptr<MCCodeEmitter> CE,
-                                     std::unique_ptr<MCAsmBackend> TAB) {
+static MCStreamer *createSystemZAsmStreamer(
+    MCContext &Ctx, std::unique_ptr<formatted_raw_ostream> OS,
+    std::unique_ptr<MCInstPrinter> IP, std::unique_ptr<MCCodeEmitter> CE,
+    std::unique_ptr<MCAsmBackend> TAB) {
 
   auto TT = Ctx.getTargetTriple();
   if (TT.isOSzOS() && !GNUAsOnzOSCL)
-    return new SystemZHLASMAsmStreamer(Ctx, std::move(OS), IP, std::move(CE),
-                                       std::move(TAB));
+    return new SystemZHLASMAsmStreamer(Ctx, std::move(OS), std::move(IP),
+                                       std::move(CE), std::move(TAB));
 
-  return llvm::createAsmStreamer(Ctx, std::move(OS), IP, std::move(CE),
-                                 std::move(TAB));
+  return llvm::createAsmStreamer(Ctx, std::move(OS), std::move(IP),
+                                 std::move(CE), std::move(TAB));
 }
 
 static MCTargetStreamer *
@@ -254,7 +253,8 @@ extern "C" LLVM_EXTERNAL_VISIBILITY void LLVMInitializeSystemZTargetMC() {
                                         createSystemZMCInstPrinter);
 
   // Register the asm streamer.
-  TargetRegistry::RegisterAsmStreamer(getTheSystemZTarget(), createAsmStreamer);
+  TargetRegistry::RegisterAsmStreamer(getTheSystemZTarget(),
+                                      createSystemZAsmStreamer);
 
   // Register the asm target streamer.
   TargetRegistry::RegisterAsmTargetStreamer(getTheSystemZTarget(),
diff --git a/llvm/test/tools/llvm-mc/disassembler-options.test b/llvm/test/tools/llvm-mc/disassembler-options.test
@@ -1,4 +1,3 @@
-# RUN: export LSAN_OPTIONS=detect_leaks=0
 # RUN: not llvm-mc -M invalid /dev/null 2>&1 | FileCheck %s
 
 # CHECK: error: invalid InstPrinter option 'invalid'
diff --git a/llvm/tools/llvm-mc/llvm-mc.cpp b/llvm/tools/llvm-mc/llvm-mc.cpp
@@ -519,10 +519,10 @@ int main(int argc, char **argv) {
   std::unique_ptr<MCInstrInfo> MCII(TheTarget->createMCInstrInfo());
   assert(MCII && "Unable to create instruction info!");
 
-  MCInstPrinter *IP = nullptr;
+  std::unique_ptr<MCInstPrinter> IP;
   if (FileType == OFT_AssemblyFile) {
-    IP = TheTarget->createMCInstPrinter(Triple(TripleName), OutputAsmVariant,
-                                        *MAI, *MCII, *MRI);
+    IP.reset(TheTarget->createMCInstPrinter(
+        Triple(TripleName), OutputAsmVariant, *MAI, *MCII, *MRI));
 
     if (!IP) {
       WithColor::error()
@@ -541,6 +541,17 @@ int main(int argc, char **argv) {
     // Set the display preference for hex vs. decimal immediates.
     IP->setPrintImmHex(PrintImmHex);
 
+    switch (Action) {
+    case AC_MDisassemble:
+      IP->setUseMarkup(true);
+      break;
+    case AC_CDisassemble:
+      IP->setUseColor(true);
+      break;
+    default:
+      break;
+    }
+
     // Set up the AsmStreamer.
     std::unique_ptr<MCCodeEmitter> CE;
     if (ShowEncoding)
@@ -549,7 +560,7 @@ int main(int argc, char **argv) {
     std::unique_ptr<MCAsmBackend> MAB(
         TheTarget->createMCAsmBackend(*STI, *MRI, MCOptions));
     auto FOut = std::make_unique<formatted_raw_ostream>(*OS);
-    Str.reset(TheTarget->createAsmStreamer(Ctx, std::move(FOut), IP,
+    Str.reset(TheTarget->createAsmStreamer(Ctx, std::move(FOut), std::move(IP),
                                            std::move(CE), std::move(MAB)));
 
   } else if (FileType == OFT_Null) {
@@ -586,13 +597,7 @@ int main(int argc, char **argv) {
                         *MCII, MCOptions);
     break;
   case AC_MDisassemble:
-    IP->setUseMarkup(true);
-    disassemble = true;
-    break;
   case AC_CDisassemble:
-    IP->setUseColor(true);
-    disassemble = true;
-    break;
   case AC_Disassemble:
     disassemble = true;
     break;
diff --git a/llvm/tools/llvm-ml/llvm-ml.cpp b/llvm/tools/llvm-ml/llvm-ml.cpp
@@ -363,13 +363,12 @@ int llvm_ml_main(int Argc, char **Argv, const llvm::ToolContext &) {
   std::unique_ptr<MCInstrInfo> MCII(TheTarget->createMCInstrInfo());
   assert(MCII && "Unable to create instruction info!");
 
-  MCInstPrinter *IP = nullptr;
   if (FileType == "s") {
     const bool OutputATTAsm = InputArgs.hasArg(OPT_output_att_asm);
     const unsigned OutputAsmVariant = OutputATTAsm ? 0U   // ATT dialect
                                                    : 1U;  // Intel dialect
-    IP = TheTarget->createMCInstPrinter(TheTriple, OutputAsmVariant, *MAI,
-                                        *MCII, *MRI);
+    std::unique_ptr<MCInstPrinter> IP(TheTarget->createMCInstPrinter(
+        TheTriple, OutputAsmVariant, *MAI, *MCII, *MRI));
 
     if (!IP) {
       WithColor::error()
@@ -390,7 +389,7 @@ int llvm_ml_main(int Argc, char **Argv, const llvm::ToolContext &) {
     std::unique_ptr<MCAsmBackend> MAB(
         TheTarget->createMCAsmBackend(*STI, *MRI, MCOptions));
     auto FOut = std::make_unique<formatted_raw_ostream>(*OS);
-    Str.reset(TheTarget->createAsmStreamer(Ctx, std::move(FOut), IP,
+    Str.reset(TheTarget->createAsmStreamer(Ctx, std::move(FOut), std::move(IP),
                                            std::move(CE), std::move(MAB)));
 
   } else if (FileType == "null") {
