Revert "[DWARFv5] Emit file 0 to the line table."

Caused an asan failure.

This reverts commit d54883f081186cdcce74e6f98cfc0438579ec019.
aka r326758

llvm-svn: 326762

1 files changed, 27 insertions, 34 deletions

diff --git a/llvm/lib/MC/MCDwarf.cpp b/llvm/lib/MC/MCDwarf.cpp
index ee675acd530..685b46a606d 100644
--- a/llvm/lib/MC/MCDwarf.cpp
+++ b/llvm/lib/MC/MCDwarf.cpp
@@ -346,34 +346,6 @@ void MCDwarfLineTableHeader::emitV2FileDirTables(MCStreamer *MCOS) const {
   MCOS->EmitIntValue(0, 1); // Terminate the file list.
 }
 
-static void emitOneV5FileEntry(MCStreamer *MCOS, const MCDwarfFile &DwarfFile,
-                               bool HasMD5, bool HasSource,
-                               Optional<MCDwarfLineStr> &LineStr) {
-  assert(!DwarfFile.Name.empty());
-  if (LineStr)
-    LineStr->emitRef(MCOS, DwarfFile.Name);
-  else {
-    MCOS->EmitBytes(DwarfFile.Name);     // FileName and...
-    MCOS->EmitBytes(StringRef("\0", 1)); // its null terminator.
-  }
-  MCOS->EmitULEB128IntValue(DwarfFile.DirIndex); // Directory number.
-  if (HasMD5) {
-    MD5::MD5Result *Cksum = DwarfFile.Checksum;
-    MCOS->EmitBinaryData(
-        StringRef(reinterpret_cast<const char *>(Cksum->Bytes.data()),
-                  Cksum->Bytes.size()));
-  }
-  if (HasSource) {
-    if (LineStr)
-      LineStr->emitRef(MCOS, DwarfFile.Source.getValueOr(StringRef()));
-    else {
-      MCOS->EmitBytes(
-          DwarfFile.Source.getValueOr(StringRef())); // Source and...
-      MCOS->EmitBytes(StringRef("\0", 1));           // its null terminator.
-    }
-  }
-}
-
 void MCDwarfLineTableHeader::emitV5FileDirTables(
     MCStreamer *MCOS, Optional<MCDwarfLineStr> &LineStr) const {
   // The directory format, which is just a list of the directory paths.  In a
@@ -422,12 +394,33 @@ void MCDwarfLineTableHeader::emitV5FileDirTables(
     MCOS->EmitULEB128IntValue(LineStr ? dwarf::DW_FORM_line_strp
                                       : dwarf::DW_FORM_string);
   }
-  // Then the counted list of files. The root file is file #0, then emit the
-  // files as provide by .file directives.
-  MCOS->EmitULEB128IntValue(MCDwarfFiles.size());
-  emitOneV5FileEntry(MCOS, RootFile, HasMD5, HasSource, LineStr);
-  for (unsigned i = 1; i < MCDwarfFiles.size(); ++i)
-    emitOneV5FileEntry(MCOS, MCDwarfFiles[i], HasMD5, HasSource, LineStr);
+  // Then the list of file names. These start at 1.
+  MCOS->EmitULEB128IntValue(MCDwarfFiles.size() - 1);
+  for (unsigned i = 1; i < MCDwarfFiles.size(); ++i) {
+    assert(!MCDwarfFiles[i].Name.empty());
+    if (LineStr)
+      LineStr->emitRef(MCOS, MCDwarfFiles[i].Name);
+    else {
+      MCOS->EmitBytes(MCDwarfFiles[i].Name); // FileName and...
+      MCOS->EmitBytes(StringRef("\0", 1));   // its null terminator.
+    }
+    MCOS->EmitULEB128IntValue(MCDwarfFiles[i].DirIndex); // Directory number.
+    if (HasMD5) {
+      MD5::MD5Result *Cksum = MCDwarfFiles[i].Checksum;
+      MCOS->EmitBinaryData(
+          StringRef(reinterpret_cast<const char *>(Cksum->Bytes.data()),
+                    Cksum->Bytes.size()));
+    }
+    if (HasSource) {
+      if (LineStr)
+        LineStr->emitRef(MCOS, MCDwarfFiles[i].Source.getValueOr(StringRef()));
+      else {
+        MCOS->EmitBytes(
+            MCDwarfFiles[i].Source.getValueOr(StringRef())); // Source and...
+        MCOS->EmitBytes(StringRef("\0", 1)); // its null terminator.
+      }
+    }
+  }
 }
 
 std::pair<MCSymbol *, MCSymbol *>