MIR Serialization: Serialize the 'dead' register machine operand flag.

llvm-svn: 241624

4 files changed, 11 insertions, 2 deletions

diff --git a/llvm/lib/CodeGen/MIRParser/MILexer.cpp b/llvm/lib/CodeGen/MIRParser/MILexer.cpp
index 856d908b778..2d11a057046 100644
--- a/llvm/lib/CodeGen/MIRParser/MILexer.cpp
+++ b/llvm/lib/CodeGen/MIRParser/MILexer.cpp
@@ -70,6 +70,7 @@ static MIToken::TokenKind getIdentifierKind(StringRef Identifier) {
       .Case("_", MIToken::underscore)
       .Case("implicit", MIToken::kw_implicit)
       .Case("implicit-def", MIToken::kw_implicit_define)
+      .Case("dead", MIToken::kw_dead)
       .Default(MIToken::Identifier);
 }
 
diff --git a/llvm/lib/CodeGen/MIRParser/MILexer.h b/llvm/lib/CodeGen/MIRParser/MILexer.h
index c66b2006e35..47c3c62b596 100644
--- a/llvm/lib/CodeGen/MIRParser/MILexer.h
+++ b/llvm/lib/CodeGen/MIRParser/MILexer.h
@@ -39,6 +39,7 @@ struct MIToken {
     // Keywords
     kw_implicit,
     kw_implicit_define,
+    kw_dead,
 
     // Identifier tokens
     Identifier,
@@ -74,7 +75,7 @@ public:
   }
 
   bool isRegisterFlag() const {
-    return Kind == kw_implicit || Kind == kw_implicit_define;
+    return Kind == kw_implicit || Kind == kw_implicit_define || Kind == kw_dead;
   }
 
   bool is(TokenKind K) const { return Kind == K; }
diff --git a/llvm/lib/CodeGen/MIRParser/MIParser.cpp b/llvm/lib/CodeGen/MIRParser/MIParser.cpp
index 463cc19d85e..8eefe19a408 100644
--- a/llvm/lib/CodeGen/MIRParser/MIParser.cpp
+++ b/llvm/lib/CodeGen/MIRParser/MIParser.cpp
@@ -305,6 +305,9 @@ bool MIParser::parseRegisterFlag(unsigned &Flags) {
   case MIToken::kw_implicit_define:
     Flags |= RegState::ImplicitDefine;
     break;
+  case MIToken::kw_dead:
+    Flags |= RegState::Dead;
+    break;
   // TODO: report an error when we specify the same flag more than once.
   // TODO: parse the other register flags.
   default:
@@ -328,7 +331,8 @@ bool MIParser::parseRegisterOperand(MachineOperand &Dest, bool IsDef) {
   lex();
   // TODO: Parse subregister.
   Dest = MachineOperand::CreateReg(Reg, Flags & RegState::Define,
-                                   Flags & RegState::Implicit);
+                                   Flags & RegState::Implicit, /*IsKill=*/false,
+                                   Flags & RegState::Dead);
   return false;
 }
 
@@ -412,6 +416,7 @@ bool MIParser::parseMachineOperand(MachineOperand &Dest) {
   switch (Token.kind()) {
   case MIToken::kw_implicit:
   case MIToken::kw_implicit_define:
+  case MIToken::kw_dead:
   case MIToken::underscore:
   case MIToken::NamedRegister:
     return parseRegisterOperand(Dest);
diff --git a/llvm/lib/CodeGen/MIRPrinter.cpp b/llvm/lib/CodeGen/MIRPrinter.cpp
index 5301df0fc4a..e02f54afd91 100644
--- a/llvm/lib/CodeGen/MIRPrinter.cpp
+++ b/llvm/lib/CodeGen/MIRPrinter.cpp
@@ -214,6 +214,8 @@ void MIPrinter::print(const MachineOperand &Op, const TargetRegisterInfo *TRI) {
     // TODO: Print the other register flags.
     if (Op.isImplicit())
       OS << (Op.isDef() ? "implicit-def " : "implicit ");
+    if (Op.isDead())
+      OS << "dead ";
     printReg(Op.getReg(), OS, TRI);
     // TODO: Print sub register.
     break;