[preprocessor] Minor optimization following r178671.
Don't bother looking for parameter index of 'B' token if 'A' is not a parameter.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@178699 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Lex/MacroInfo.cpp b/lib/Lex/MacroInfo.cpp
index 5abafe1..b61ff71 100644
--- a/lib/Lex/MacroInfo.cpp
+++ b/lib/Lex/MacroInfo.cpp
@@ -110,8 +110,9 @@
// With syntactic equivalence the parameter names can be different as long
// as they are used in the same place.
int AArgNum = getArgumentNum(A.getIdentifierInfo());
- int BArgNum = Other.getArgumentNum(B.getIdentifierInfo());
- if (AArgNum == -1 || AArgNum != BArgNum)
+ if (AArgNum == -1)
+ return false;
+ if (AArgNum != Other.getArgumentNum(B.getIdentifierInfo()))
return false;
continue;
}