[Xtensa] Use ctors for Xtensa target by default

Author: andreisfr

llvm/lib/Target/Xtensa/CMakeLists.txt

@@ -25,6 +25,7 @@ add_llvm_target(XtensaCodeGen
   XtensaSizeReductionPass.cpp
   XtensaSubtarget.cpp
   XtensaTargetMachine.cpp
+  XtensaTargetObjectFile.cpp
   )
 
 add_subdirectory(AsmParser)

llvm/lib/Target/Xtensa/XtensaTargetMachine.cpp

@@ -13,6 +13,7 @@
 //===----------------------------------------------------------------------===//
 
 #include "XtensaTargetMachine.h"
+#include "XtensaTargetObjectFile.h"
 #include "llvm/CodeGen/Passes.h"
 #include "llvm/CodeGen/TargetLoweringObjectFileImpl.h"
 #include "llvm/CodeGen/TargetPassConfig.h"
@@ -43,6 +44,10 @@ static Reloc::Model getEffectiveRelocModel(bool JIT,
   return *RM;
 }
 
+static std::unique_ptr<TargetLoweringObjectFile> createTLOF() {
+  return std::make_unique<XtensaElfTargetObjectFile>();
+}
+
 XtensaTargetMachine::XtensaTargetMachine(const Target &T, const Triple &TT,
                                          StringRef CPU, StringRef FS,
                                          const TargetOptions &Options,
@@ -53,7 +58,7 @@ XtensaTargetMachine::XtensaTargetMachine(const Target &T, const Triple &TT,
     : LLVMTargetMachine(T, computeDataLayout(TT, CPU, Options, isLittle), TT,
                         CPU, FS, Options, getEffectiveRelocModel(JIT, RM),
                         getEffectiveCodeModel(CM, CodeModel::Small), OL),
-      TLOF(std::make_unique<TargetLoweringObjectFileELF>()),
+      TLOF(createTLOF()),
       Subtarget(TT, std::string(CPU), std::string(FS), *this) {
   initAsmInfo();
 }

llvm/lib/Target/Xtensa/XtensaTargetObjectFile.cpp

@@ -0,0 +1,23 @@
+//===-- llvm/Target/XtensaTargetObjectFile.cpp - Xtensa Object Info Impl --===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+#include "XtensaTargetObjectFile.h"
+#include "llvm/MC/MCContext.h"
+#include "llvm/Target/TargetMachine.h"
+
+using namespace llvm;
+
+//===----------------------------------------------------------------------===//
+//                               ELF Target
+//===----------------------------------------------------------------------===//
+
+void XtensaElfTargetObjectFile::Initialize(MCContext &Ctx,
+                                           const TargetMachine &TM) {
+  TargetLoweringObjectFileELF::Initialize(Ctx, TM);
+  InitializeELF(false);
+}

llvm/lib/Target/Xtensa/XtensaTargetObjectFile.h

@@ -0,0 +1,25 @@
+//===- llvm/Target/XtensaTargetObjectFile.h - Xtensa Object Info -*- C++ -*-==//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_LIB_TARGET_XTENSA_XTENSATARGETOBJECTFILE_H
+#define LLVM_LIB_TARGET_XTENSA_XTENSATARGETOBJECTFILE_H
+
+#include "llvm/CodeGen/TargetLoweringObjectFileImpl.h"
+
+namespace llvm {
+
+class XtensaElfTargetObjectFile : public TargetLoweringObjectFileELF {
+public:
+  XtensaElfTargetObjectFile() : TargetLoweringObjectFileELF() {}
+
+  void Initialize(MCContext &Ctx, const TargetMachine &TM) override;
+};
+
+} // end namespace llvm
+
+#endif // LLVM_LIB_TARGET_XTENSA_XTENSATARGETOBJECTFILE_H