[llvm-branch-commits] [llvm] [llvm-debuginfo-analyzer] Add support for LLVM IR format. (PR #135440)

[Jeremy Morse via llvm-branch-commits]

================
@@ -0,0 +1,300 @@
+//===-- LVIRReader.h --------------------------------------------*- 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
+//
+//===----------------------------------------------------------------------===//
+//
+// This file defines the LVIRReader class, which is used to describe a
+// LLVM IR reader.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_DEBUGINFO_LOGICALVIEW_READERS_LVIRREADER_H
+#define LLVM_DEBUGINFO_LOGICALVIEW_READERS_LVIRREADER_H
+
+#include "llvm/DebugInfo/LogicalView/Core/LVReader.h"
+#include "llvm/Transforms/Utils/DebugSSAUpdater.h"
+
+namespace llvm {
+class DIFile;
+class DINode;
+class DILocation;
+class DIScope;
+class DISubprogram;
+class DIVariable;
+class BasicBlock;
+
+namespace object {
+class IRObjectFile;
+}
+
+namespace logicalview {
+
+class LVElement;
+class LVLine;
+class LVScopeCompileUnit;
+class LVSymbol;
+class LVType;
+
+class LVIRReader final : public LVReader {
+  object::IRObjectFile *BitCodeIR = nullptr;
+  MemoryBufferRef *TextualIR = nullptr;
+
+  // Symbols with locations for current compile unit.
+  LVSymbols SymbolsWithLocations;
+
+  LVSectionIndex SectionIndex = 0;
+
+  const DICompileUnit *CUNode = nullptr;
+
+  // The Dwarf Version (from the module flags).
+  unsigned DwarfVersion;
+
+  // Location index for global variables.
+  uint64_t PoolAddressIndex = 0;
+
+  // Whether to emit all linkage names, or just abstract subprograms.
+  bool UseAllLinkageNames = true;
+
+  // Dependencies on external options (llc, etc).
+  bool includeMinimalInlineScopes() const;
+  bool useAllLinkageNames() const { return UseAllLinkageNames; }
+
+  bool LanguageIsFortran = false;
----------------
jmorse wrote:

IMO the more natural approach is to store the current DWLang code and test it each time to see whether it's Fortran -- it's a style thing, but IMO better signals that Fortran isn't special, instead the input language is significant and some parts of llvm-debuginfo-analyzer test for whether the input is fortran.

https://github.com/llvm/llvm-project/pull/135440