Imported Upstream version 5.18.0.182

Former-commit-id: f9d55cf82631bfd710c387739687e5845296aea1

external/llvm/lib/CodeGen/AsmPrinter/DwarfFile.cpp

@@ -1,118 +0,0 @@
-//===- llvm/CodeGen/DwarfFile.cpp - Dwarf Debug Framework -----------------===//
-//
-//                     The LLVM Compiler Infrastructure
-//
-// This file is distributed under the University of Illinois Open Source
-// License. See LICENSE.TXT for details.
-//
-//===----------------------------------------------------------------------===//
-
-#include "DwarfFile.h"
-#include "DwarfCompileUnit.h"
-#include "DwarfDebug.h"
-#include "DwarfUnit.h"
-#include "llvm/ADT/SmallVector.h"
-#include "llvm/CodeGen/AsmPrinter.h"
-#include "llvm/CodeGen/DIE.h"
-#include "llvm/IR/DebugInfoMetadata.h"
-#include "llvm/MC/MCStreamer.h"
-#include <algorithm>
-#include <cstdint>
-
-using namespace llvm;
-
-DwarfFile::DwarfFile(AsmPrinter *AP, StringRef Pref, BumpPtrAllocator &DA)
-    : Asm(AP), Abbrevs(AbbrevAllocator), StrPool(DA, *Asm, Pref) {}
-
-void DwarfFile::addUnit(std::unique_ptr<DwarfCompileUnit> U) {
-  CUs.push_back(std::move(U));
-}
-
-// Emit the various dwarf units to the unit section USection with
-// the abbreviations going into ASection.
-void DwarfFile::emitUnits(bool UseOffsets) {
-  for (const auto &TheU : CUs)
-    emitUnit(TheU.get(), UseOffsets);
-}
-
-void DwarfFile::emitUnit(DwarfUnit *TheU, bool UseOffsets) {
-  DIE &Die = TheU->getUnitDie();
-  MCSection *USection = TheU->getSection();
-  Asm->OutStreamer->SwitchSection(USection);
-
-  TheU->emitHeader(UseOffsets);
-
-  Asm->emitDwarfDIE(Die);
-}
-
-// Compute the size and offset for each DIE.
-void DwarfFile::computeSizeAndOffsets() {
-  // Offset from the first CU in the debug info section is 0 initially.
-  unsigned SecOffset = 0;
-
-  // Iterate over each compile unit and set the size and offsets for each
-  // DIE within each compile unit. All offsets are CU relative.
-  for (const auto &TheU : CUs) {
-    TheU->setDebugSectionOffset(SecOffset);
-    SecOffset += computeSizeAndOffsetsForUnit(TheU.get());
-  }
-}
-
-unsigned DwarfFile::computeSizeAndOffsetsForUnit(DwarfUnit *TheU) {
-  // CU-relative offset is reset to 0 here.
-  unsigned Offset = sizeof(int32_t) +      // Length of Unit Info
-                    TheU->getHeaderSize(); // Unit-specific headers
-
-  // The return value here is CU-relative, after laying out
-  // all of the CU DIE.
-  return computeSizeAndOffset(TheU->getUnitDie(), Offset);
-}
-
-// Compute the size and offset of a DIE. The offset is relative to start of the
-// CU. It returns the offset after laying out the DIE.
-unsigned DwarfFile::computeSizeAndOffset(DIE &Die, unsigned Offset) {
-  return Die.computeOffsetsAndAbbrevs(Asm, Abbrevs, Offset);
-}
-
-void DwarfFile::emitAbbrevs(MCSection *Section) { Abbrevs.Emit(Asm, Section); }
-
-// Emit strings into a string section.
-void DwarfFile::emitStrings(MCSection *StrSection, MCSection *OffsetSection) {
-  StrPool.emit(*Asm, StrSection, OffsetSection);
-}
-
-bool DwarfFile::addScopeVariable(LexicalScope *LS, DbgVariable *Var) {
-  SmallVectorImpl<DbgVariable *> &Vars = ScopeVariables[LS];
-  const DILocalVariable *DV = Var->getVariable();
-  // Variables with positive arg numbers are parameters.
-  if (unsigned ArgNum = DV->getArg()) {
-    // Keep all parameters in order at the start of the variable list to ensure
-    // function types are correct (no out-of-order parameters)
-    //
-    // This could be improved by only doing it for optimized builds (unoptimized
-    // builds have the right order to begin with), searching from the back (this
-    // would catch the unoptimized case quickly), or doing a binary search
-    // rather than linear search.
-    auto I = Vars.begin();
-    while (I != Vars.end()) {
-      unsigned CurNum = (*I)->getVariable()->getArg();
-      // A local (non-parameter) variable has been found, insert immediately
-      // before it.
-      if (CurNum == 0)
-        break;
-      // A later indexed parameter has been found, insert immediately before it.
-      if (CurNum > ArgNum)
-        break;
-      if (CurNum == ArgNum) {
-        (*I)->addMMIEntry(*Var);
-        return false;
-      }
-      ++I;
-    }
-    Vars.insert(I, Var);
-    return true;
-  }
-
-  Vars.push_back(Var);
-  return true;
-}