[DWARF parser] Use enums instead of bitfields in DILineInfoSpecifier.

It is more appropriate than the current situation, when one flag
(AbsoluteFilePath) is relevant only if another flag is set.

This refactoring would also simplify fetching the short function name
(stored in DW_AT_name) instead of a linkage name returned currently.

No functionality change.

llvm-svn: 208921

1 files changed, 38 insertions, 44 deletions

diff --git a/llvm/lib/DebugInfo/DWARFContext.cpp b/llvm/lib/DebugInfo/DWARFContext.cpp
index 3d04e73903e..e52e8afab84 100644
--- a/llvm/lib/DebugInfo/DWARFContext.cpp
+++ b/llvm/lib/DebugInfo/DWARFContext.cpp
@@ -25,6 +25,8 @@ using namespace object;
 #define DEBUG_TYPE "dwarf"
 
 typedef DWARFDebugLine::LineTable DWARFLineTable;
+typedef DILineInfoSpecifier::FileLineInfoKind FileLineInfoKind;
+typedef DILineInfoSpecifier::FunctionNameKind FunctionNameKind;
 
 static void dumpPubSection(raw_ostream &OS, StringRef Name, StringRef Data,
                            bool LittleEndian, bool GnuStyle) {
@@ -425,14 +427,13 @@ DWARFCompileUnit *DWARFContext::getCompileUnitForAddress(uint64_t Address) {
 
 static bool getFileNameForCompileUnit(DWARFCompileUnit *CU,
                                       const DWARFLineTable *LineTable,
-                                      uint64_t FileIndex,
-                                      bool NeedsAbsoluteFilePath,
+                                      uint64_t FileIndex, FileLineInfoKind Kind,
                                       std::string &FileName) {
-  if (!CU || !LineTable ||
-      !LineTable->getFileNameByIndex(FileIndex, NeedsAbsoluteFilePath,
-                                     FileName))
+  if (!CU || !LineTable || Kind == FileLineInfoKind::None ||
+      !LineTable->getFileNameByIndex(FileIndex, Kind, FileName))
     return false;
-  if (NeedsAbsoluteFilePath && sys::path::is_relative(FileName)) {
+  if (Kind == FileLineInfoKind::AbsoluteFilePath &&
+      sys::path::is_relative(FileName)) {
     // We may still need to append compilation directory of compile unit.
     SmallString<16> AbsolutePath;
     if (const char *CompilationDir = CU->getCompilationDir()) {
@@ -447,7 +448,7 @@ static bool getFileNameForCompileUnit(DWARFCompileUnit *CU,
 static bool getFileLineInfoForCompileUnit(DWARFCompileUnit *CU,
                                           const DWARFLineTable *LineTable,
                                           uint64_t Address,
-                                          bool NeedsAbsoluteFilePath,
+                                          FileLineInfoKind Kind,
                                           DILineInfo &Result) {
   if (!CU || !LineTable)
     return false;
@@ -457,7 +458,7 @@ static bool getFileLineInfoForCompileUnit(DWARFCompileUnit *CU,
     return false;
   // Take file number and line/column from the row.
   const DWARFDebugLine::Row &Row = LineTable->Rows[RowIndex];
-  if (!getFileNameForCompileUnit(CU, LineTable, Row.File, NeedsAbsoluteFilePath,
+  if (!getFileNameForCompileUnit(CU, LineTable, Row.File, Kind,
                                  Result.FileName))
     return false;
   Result.Line = Row.Line;
@@ -466,7 +467,10 @@ static bool getFileLineInfoForCompileUnit(DWARFCompileUnit *CU,
 }
 
 static bool getFunctionNameForAddress(DWARFCompileUnit *CU, uint64_t Address,
+                                      FunctionNameKind Kind,
                                       std::string &FunctionName) {
+  if (Kind == FunctionNameKind::None)
+    return false;
   // The address may correspond to instruction in some inlined function,
   // so we have to build the chain of inlined functions and take the
   // name of the topmost function in it.
@@ -475,7 +479,8 @@ static bool getFunctionNameForAddress(DWARFCompileUnit *CU, uint64_t Address,
   if (InlinedChain.DIEs.size() == 0)
     return false;
   const DWARFDebugInfoEntryMinimal &TopFunctionDIE = InlinedChain.DIEs[0];
-  if (const char *Name = TopFunctionDIE.getSubroutineName(InlinedChain.U)) {
+  if (const char *Name =
+          TopFunctionDIE.getSubroutineName(InlinedChain.U, Kind)) {
     FunctionName = Name;
     return true;
   }
@@ -483,41 +488,34 @@ static bool getFunctionNameForAddress(DWARFCompileUnit *CU, uint64_t Address,
 }
 
 DILineInfo DWARFContext::getLineInfoForAddress(uint64_t Address,
-    DILineInfoSpecifier Specifier) {
+                                               DILineInfoSpecifier Spec) {
   DILineInfo Result;
 
   DWARFCompileUnit *CU = getCompileUnitForAddress(Address);
   if (!CU)
     return Result;
-  if (Specifier.needs(DILineInfoSpecifier::FunctionName)) {
-    getFunctionNameForAddress(CU, Address, Result.FunctionName);
-  }
-  if (Specifier.needs(DILineInfoSpecifier::FileLineInfo)) {
+  getFunctionNameForAddress(CU, Address, Spec.FNKind, Result.FunctionName);
+  if (Spec.FLIKind != FileLineInfoKind::None) {
     const DWARFLineTable *LineTable = getLineTableForCompileUnit(CU);
-    const bool NeedsAbsoluteFilePath =
-        Specifier.needs(DILineInfoSpecifier::AbsoluteFilePath);
-    getFileLineInfoForCompileUnit(CU, LineTable, Address, NeedsAbsoluteFilePath,
-                                  Result);
+    getFileLineInfoForCompileUnit(CU, LineTable, Address, Spec.FLIKind, Result);
   }
   return Result;
 }
 
-DILineInfoTable DWARFContext::getLineInfoForAddressRange(uint64_t Address,
-    uint64_t Size,
-    DILineInfoSpecifier Specifier) {
+DILineInfoTable
+DWARFContext::getLineInfoForAddressRange(uint64_t Address, uint64_t Size,
+                                         DILineInfoSpecifier Spec) {
   DILineInfoTable  Lines;
   DWARFCompileUnit *CU = getCompileUnitForAddress(Address);
   if (!CU)
     return Lines;
 
   std::string FunctionName = "<invalid>";
-  if (Specifier.needs(DILineInfoSpecifier::FunctionName)) {
-    getFunctionNameForAddress(CU, Address, FunctionName);
-  }
+  getFunctionNameForAddress(CU, Address, Spec.FNKind, FunctionName);
 
   // If the Specifier says we don't need FileLineInfo, just
   // return the top-most function at the starting address.
-  if (!Specifier.needs(DILineInfoSpecifier::FileLineInfo)) {
+  if (Spec.FLIKind == FileLineInfoKind::None) {
     DILineInfo Result;
     Result.FunctionName = FunctionName;
     Lines.push_back(std::make_pair(Address, Result));
@@ -525,8 +523,6 @@ DILineInfoTable DWARFContext::getLineInfoForAddressRange(uint64_t Address,
   }
 
   const DWARFLineTable *LineTable = getLineTableForCompileUnit(CU);
-  const bool NeedsAbsoluteFilePath =
-      Specifier.needs(DILineInfoSpecifier::AbsoluteFilePath);
 
   // Get the index of row we're looking for in the line table.
   std::vector<uint32_t> RowVector;
@@ -537,7 +533,7 @@ DILineInfoTable DWARFContext::getLineInfoForAddressRange(uint64_t Address,
     // Take file number and line/column from the row.
     const DWARFDebugLine::Row &Row = LineTable->Rows[RowIndex];
     DILineInfo Result;
-    getFileNameForCompileUnit(CU, LineTable, Row.File, NeedsAbsoluteFilePath,
+    getFileNameForCompileUnit(CU, LineTable, Row.File, Spec.FLIKind,
                               Result.FileName);
     Result.FunctionName = FunctionName;
     Result.Line = Row.Line;
@@ -548,8 +544,9 @@ DILineInfoTable DWARFContext::getLineInfoForAddressRange(uint64_t Address,
   return Lines;
 }
 
-DIInliningInfo DWARFContext::getInliningInfoForAddress(uint64_t Address,
-    DILineInfoSpecifier Specifier) {
+DIInliningInfo
+DWARFContext::getInliningInfoForAddress(uint64_t Address,
+                                        DILineInfoSpecifier Spec) {
   DIInliningInfo InliningInfo;
 
   DWARFCompileUnit *CU = getCompileUnitForAddress(Address);
@@ -557,18 +554,16 @@ DIInliningInfo DWARFContext::getInliningInfoForAddress(uint64_t Address,
     return InliningInfo;
 
   const DWARFLineTable *LineTable = nullptr;
-  const bool NeedsAbsoluteFilePath =
-      Specifier.needs(DILineInfoSpecifier::AbsoluteFilePath);
   const DWARFDebugInfoEntryInlinedChain &InlinedChain =
       CU->getInlinedChainForAddress(Address);
   if (InlinedChain.DIEs.size() == 0) {
     // If there is no DIE for address (e.g. it is in unavailable .dwo file),
     // try to at least get file/line info from symbol table.
-    if (Specifier.needs(DILineInfoSpecifier::FileLineInfo)) {
+    if (Spec.FLIKind != FileLineInfoKind::None) {
       DILineInfo Frame;
       LineTable = getLineTableForCompileUnit(CU);
-      if (getFileLineInfoForCompileUnit(CU, LineTable, Address,
-                                        NeedsAbsoluteFilePath, Frame)) {
+      if (getFileLineInfoForCompileUnit(CU, LineTable, Address, Spec.FLIKind,
+                                        Frame)) {
         InliningInfo.addFrame(Frame);
       }
     }
@@ -580,23 +575,22 @@ DIInliningInfo DWARFContext::getInliningInfoForAddress(uint64_t Address,
     const DWARFDebugInfoEntryMinimal &FunctionDIE = InlinedChain.DIEs[i];
     DILineInfo Frame;
     // Get function name if necessary.
-    if (Specifier.needs(DILineInfoSpecifier::FunctionName)) {
-      if (const char *Name = FunctionDIE.getSubroutineName(InlinedChain.U))
-        Frame.FunctionName = Name;
-    }
-    if (Specifier.needs(DILineInfoSpecifier::FileLineInfo)) {
+    if (const char *Name =
+            FunctionDIE.getSubroutineName(InlinedChain.U, Spec.FNKind))
+      Frame.FunctionName = Name;
+    if (Spec.FLIKind != FileLineInfoKind::None) {
       if (i == 0) {
         // For the topmost frame, initialize the line table of this
         // compile unit and fetch file/line info from it.
         LineTable = getLineTableForCompileUnit(CU);
         // For the topmost routine, get file/line info from line table.
-        getFileLineInfoForCompileUnit(CU, LineTable, Address,
-                                      NeedsAbsoluteFilePath, Frame);
+        getFileLineInfoForCompileUnit(CU, LineTable, Address, Spec.FLIKind,
+                                      Frame);
       } else {
         // Otherwise, use call file, call line and call column from
         // previous DIE in inlined chain.
-        getFileNameForCompileUnit(CU, LineTable, CallFile,
-                                  NeedsAbsoluteFilePath, Frame.FileName);
+        getFileNameForCompileUnit(CU, LineTable, CallFile, Spec.FLIKind,
+                                  Frame.FileName);
         Frame.Line = CallLine;
         Frame.Column = CallColumn;
       }