Sync upstream to r102410.

Re-turn on sdk.

Change-Id: I91a890863989a67243b4d2dfd1ae09b843ebaeaf

1 files changed, 13 insertions, 2 deletions

diff --git a/lib/MC/MCParser/AsmLexer.cpp b/lib/MC/MCParser/AsmLexer.cpp
index 482eefd..1183312 100644
--- a/lib/MC/MCParser/AsmLexer.cpp
+++ b/lib/MC/MCParser/AsmLexer.cpp
@@ -74,6 +74,11 @@ AsmToken AsmLexer::LexIdentifier() {
   while (isalnum(*CurPtr) || *CurPtr == '_' || *CurPtr == '$' ||
          *CurPtr == '.' || *CurPtr == '@')
     ++CurPtr;
+  
+  // Handle . as a special case.
+  if (CurPtr == TokStart+1 && TokStart[0] == '.')
+    return AsmToken(AsmToken::Dot, StringRef(TokStart, 1));
+  
   return AsmToken(AsmToken::Identifier, StringRef(TokStart, CurPtr - TokStart));
 }
 
@@ -140,8 +145,14 @@ AsmToken AsmLexer::LexDigit() {
     StringRef Result(TokStart, CurPtr - TokStart);
     
     long long Value;
-    if (Result.getAsInteger(10, Value))
-      return ReturnError(TokStart, "Invalid decimal number");
+    if (Result.getAsInteger(10, Value)) {
+      // We have to handle minint_as_a_positive_value specially, because
+      // - minint_as_a_positive_value = minint and it is valid.
+      if (Result == "9223372036854775808")
+        Value = -9223372036854775808ULL;
+      else
+        return ReturnError(TokStart, "Invalid decimal number");
+    }
     return AsmToken(AsmToken::Integer, Result, Value);
   }