MCAsmParser: Amend \+ expansion

Amend 7c95629 ("MCAsmParser: Support
\+") to increase Macro.Count per iteration to match the new gas feature
(milestone: 2.43).

Author: MaskRay

llvm/lib/MC/MCParser/AsmParser.cpp

@@ -2580,7 +2580,7 @@ bool AsmParser::expandMacro(raw_svector_ostream &OS, MCAsmMacro &Macro,
         OS << NumOfMacroInstantiations;
         Pos += 2;
       } else if (Argument == "+") {
-        OS << Macro.Count++;
+        OS << Macro.Count;
         Pos += 2;
       } else {
         for (; Index < NParameters; ++Index)
@@ -2629,6 +2629,7 @@ bool AsmParser::expandMacro(raw_svector_ostream &OS, MCAsmMacro &Macro,
     Body = Body.substr(Pos);
   }
 
+  ++Macro.Count;
   return false;
 }
 

llvm/test/MC/AsmParser/macro-at-pseudo-variable.s

@@ -74,15 +74,15 @@
 
 #--- b.s
 .rept 2
-  .print "r\+"
+  .print "r\+ \+"
 .endr
 .irpc foo,12
-  .print "\+i"
+  .print "\+\+i"
 .endr
-# CHECK2:      r0
-# CHECK2-NEXT: r1
-# CHECK2-NEXT: 0i
-# CHECK2-NEXT: 1i
+# CHECK2:      r0 0
+# CHECK2-NEXT: r1 1
+# CHECK2-NEXT: 00i
+# CHECK2-NEXT: 11i
 
 .rept 2
   .rept 2