1 files changed, 15 insertions, 4 deletions

diff --git a/llvm/lib/Target/Sparc/AsmParser/SparcAsmParser.cpp b/llvm/lib/Target/Sparc/AsmParser/SparcAsmParser.cpp
index 2d3137f38821..16e159621672 100644
--- a/llvm/lib/Target/Sparc/AsmParser/SparcAsmParser.cpp
+++ b/llvm/lib/Target/Sparc/AsmParser/SparcAsmParser.cpp
@@ -68,6 +68,8 @@ class SparcAsmParser : public MCTargetAsmParser {
                                uint64_t &ErrorInfo,
                                bool MatchingInlineAsm) override;
   bool ParseRegister(unsigned &RegNo, SMLoc &StartLoc, SMLoc &EndLoc) override;
+  OperandMatchResultTy tryParseRegister(unsigned &RegNo, SMLoc &StartLoc,
+                                        SMLoc &EndLoc) override;
   bool ParseInstruction(ParseInstructionInfo &Info, StringRef Name,
                         SMLoc NameLoc, OperandVector &Operands) override;
   bool ParseDirective(AsmToken DirectiveID) override;
@@ -600,7 +602,7 @@ bool SparcAsmParser::MatchAndEmitInstruction(SMLoc IDLoc, unsigned &Opcode,
     }
 
     for (const MCInst &I : Instructions) {
-      Out.EmitInstruction(I, getSTI());
+      Out.emitInstruction(I, getSTI());
     }
     return false;
   }
@@ -630,20 +632,29 @@ bool SparcAsmParser::MatchAndEmitInstruction(SMLoc IDLoc, unsigned &Opcode,
 
 bool SparcAsmParser::ParseRegister(unsigned &RegNo, SMLoc &StartLoc,
                                    SMLoc &EndLoc) {
+  if (tryParseRegister(RegNo, StartLoc, EndLoc) != MatchOperand_Success)
+    return Error(StartLoc, "invalid register name");
+  return false;
+}
+
+OperandMatchResultTy SparcAsmParser::tryParseRegister(unsigned &RegNo,
+                                                      SMLoc &StartLoc,
+                                                      SMLoc &EndLoc) {
   const AsmToken &Tok = Parser.getTok();
   StartLoc = Tok.getLoc();
   EndLoc = Tok.getEndLoc();
   RegNo = 0;
   if (getLexer().getKind() != AsmToken::Percent)
-    return false;
+    return MatchOperand_Success;
   Parser.Lex();
   unsigned regKind = SparcOperand::rk_None;
   if (matchRegisterName(Tok, RegNo, regKind)) {
     Parser.Lex();
-    return false;
+    return MatchOperand_Success;
   }
 
-  return Error(StartLoc, "invalid register name");
+  getLexer().UnLex(Tok);
+  return MatchOperand_NoMatch;
 }
 
 static void applyMnemonicAliases(StringRef &Mnemonic,