[ms-inline asm] Make sure we fail gracefully on parse errors. Parse errors

should only occur on invalid input.  Instruction matching errors aren't
unexpected, so we can't rely on the AsmParsers HadError variable directly.
rdar://12840278

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@170037 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 9 insertions, 2 deletions

diff --git a/lib/MC/MCParser/AsmParser.cpp b/lib/MC/MCParser/AsmParser.cpp
index 2c06604..f7798c5 100644
--- a/lib/MC/MCParser/AsmParser.cpp
+++ b/lib/MC/MCParser/AsmParser.cpp
@@ -97,11 +97,14 @@ struct ParseStatementInfo {
   /// Opcode - The opcode from the last parsed instruction.
   unsigned Opcode;
 
+  /// Error - Was there an error parsing the inline assembly?
+  bool ParseError;
+
   SmallVectorImpl<AsmRewrite> *AsmRewrites;
 
-  ParseStatementInfo() : Opcode(~0U), AsmRewrites(0) {}
+  ParseStatementInfo() : Opcode(~0U), ParseError(false), AsmRewrites(0) {}
   ParseStatementInfo(SmallVectorImpl<AsmRewrite> *rewrites)
-    : Opcode(~0), AsmRewrites(rewrites) {}
+    : Opcode(~0), ParseError(false), AsmRewrites(rewrites) {}
 
   ~ParseStatementInfo() {
     // Free any parsed operands.
@@ -1385,6 +1388,7 @@ bool AsmParser::ParseStatement(ParseStatementInfo &Info) {
   ParseInstructionInfo IInfo(Info.AsmRewrites);
   bool HadError = getTargetParser().ParseInstruction(IInfo, OpcodeStr.str(),
                                                      IDLoc,Info.ParsedOperands);
+  Info.ParseError = HadError;
 
   // Dump the parsed representation, if requested.
   if (getShowParsedOperands()) {
@@ -3705,6 +3709,9 @@ bool AsmParser::ParseMSInlineAsm(void *AsmLoc, std::string &AsmString,
     if (ParseStatement(Info))
       return true;
 
+    if (Info.ParseError)
+      return true;
+
     if (Info.Opcode != ~0U) {
       const MCInstrDesc &Desc = MII->get(Info.Opcode);