llvm/unittests/DebugInfo/DWARF/DwarfUtils.cpp

   1 //===--- unittests/DebugInfo/DWARF/DwarfUtils.cpp ---------------*- C++ -*-===//
   2 //
   3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
   4 // See https://llvm.org/LICENSE.txt for license information.
   5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
   6 //
   7 //===----------------------------------------------------------------------===//
   8
   9 #include "DwarfUtils.h"
  10 #include "llvm/Config/llvm-config.h"
  11 #include "llvm/MC/TargetRegistry.h"
  12 #include "llvm/Support/TargetSelect.h"
  13 #include "llvm/TargetParser/Host.h"
  14 #include "llvm/TargetParser/Triple.h"
  15
  16 using namespace llvm;
  17
  18 static void initLLVMIfNeeded() {
  19   static bool gInitialized = false;
  20   if (!gInitialized) {
  21     gInitialized = true;
  22     InitializeAllTargets();
  23     InitializeAllTargetMCs();
  24     InitializeAllAsmPrinters();
  25     InitializeAllAsmParsers();
  26   }
  27 }
  28
  29 Triple llvm::dwarf::utils::getNormalizedDefaultTargetTriple() {
  30   Triple T(Triple::normalize(sys::getDefaultTargetTriple()));
  31
  32   return T;
  33 }
  34
  35 Triple llvm::dwarf::utils::getDefaultTargetTripleForAddrSize(uint8_t AddrSize) {
  36   Triple T = getNormalizedDefaultTargetTriple();
  37
  38   assert((AddrSize == 4 || AddrSize == 8) &&
  39          "Only 32-bit/64-bit address size variants are supported");
  40
  41   // If a 32-bit/64-bit address size was specified, try to convert the triple
  42   // if it is for the wrong variant.
  43   if (AddrSize == 8 && T.isArch32Bit())
  44     return T.get64BitArchVariant();
  45   if (AddrSize == 4 && T.isArch64Bit())
  46     return T.get32BitArchVariant();
  47   return T;
  48 }
  49
  50 bool llvm::dwarf::utils::isConfigurationSupported(Triple &T) {
  51   initLLVMIfNeeded();
  52   std::string Err;
  53   const Target *TheTarget = TargetRegistry::lookupTarget(T.getTriple(), Err);
  54   return TheTarget && TheTarget->hasMCAsmBackend();
  55 }