DebugInfo: use strongly typed enum for debug info flags

Use ADT/BitmaskEnum for DINode::DIFlags for the following purposes:
    * Get rid of unsigned int for flags to avoid problems on platforms with sizeof(int) < 4
    * Flags are now strongly typed

Patch by: Victor Leschuk <vleschuk@gmail.com>

Differential Revision: https://reviews.llvm.org/D23766

llvm-svn: 280686

1 files changed, 12 insertions, 9 deletions

diff --git a/llvm/lib/AsmParser/LLParser.cpp b/llvm/lib/AsmParser/LLParser.cpp
index a39cbfd22f8..5120b949e84 100644
--- a/llvm/lib/AsmParser/LLParser.cpp
+++ b/llvm/lib/AsmParser/LLParser.cpp
@@ -1271,7 +1271,7 @@ bool LLParser::ParseStringConstant(std::string &Result) {
 
 /// ParseUInt32
 ///   ::= uint32
-bool LLParser::ParseUInt32(unsigned &Val) {
+bool LLParser::ParseUInt32(uint32_t &Val) {
   if (Lex.getKind() != lltok::APSInt || Lex.getAPSIntVal().isSigned())
     return TokError("expected integer");
   uint64_t Val64 = Lex.getAPSIntVal().getLimitedValue(0xFFFFFFFFULL+1);
@@ -3407,8 +3407,8 @@ struct EmissionKindField : public MDUnsignedField {
   EmissionKindField() : MDUnsignedField(0, DICompileUnit::LastEmissionKind) {}
 };
 
-struct DIFlagField : public MDUnsignedField {
-  DIFlagField() : MDUnsignedField(0, UINT32_MAX) {}
+struct DIFlagField : public MDFieldImpl<DINode::DIFlags> {
+  DIFlagField() : MDFieldImpl(DINode::FlagZero) {}
 };
 
 struct MDSignedField : public MDFieldImpl<int64_t> {
@@ -3610,12 +3610,15 @@ bool LLParser::ParseMDField(LocTy Loc, StringRef Name,
 ///  ::= DIFlagVector '|' DIFlagFwdDecl '|' uint32 '|' DIFlagPublic
 template <>
 bool LLParser::ParseMDField(LocTy Loc, StringRef Name, DIFlagField &Result) {
-  assert(Result.Max == UINT32_MAX && "Expected only 32-bits");
 
   // Parser for a single flag.
-  auto parseFlag = [&](unsigned &Val) {
-    if (Lex.getKind() == lltok::APSInt && !Lex.getAPSIntVal().isSigned())
-      return ParseUInt32(Val);
+  auto parseFlag = [&](DINode::DIFlags &Val) {
+    if (Lex.getKind() == lltok::APSInt && !Lex.getAPSIntVal().isSigned()) {
+      uint32_t TempVal = static_cast<uint32_t>(Val);
+      bool Res = ParseUInt32(TempVal);
+      Val = static_cast<DINode::DIFlags>(TempVal);
+      return Res;
+    }
 
     if (Lex.getKind() != lltok::DIFlag)
       return TokError("expected debug info flag");
@@ -3629,9 +3632,9 @@ bool LLParser::ParseMDField(LocTy Loc, StringRef Name, DIFlagField &Result) {
   };
 
   // Parse the flags and combine them together.
-  unsigned Combined = 0;
+  DINode::DIFlags Combined = DINode::FlagZero;
   do {
-    unsigned Val;
+    DINode::DIFlags Val;
     if (parseFlag(Val))
       return true;
     Combined |= Val;