Index: lib/MC/MCParser/AsmParser.cpp
===================================================================
--- lib/MC/MCParser/AsmParser.cpp
+++ lib/MC/MCParser/AsmParser.cpp
@@ -1996,7 +1996,7 @@
     if (ParenLevel == 0 && Lexer.is(AsmToken::Comma))
       break;
 
-    if (Lexer.is(AsmToken::Space)) {
+    if (ParenLevel == 0 && Lexer.is(AsmToken::Space)) {
       Lex(); // Eat spaces
 
       // Spaces can delimit parameters, but could also be part an expression.
@@ -2011,9 +2011,8 @@
             AddTokens = 2;
         }
 
-        if (!AddTokens && ParenLevel == 0) {
+        if (!AddTokens)
           break;
-        }
       }
     }
 
Index: test/MC/AsmParser/macros-gas.s
===================================================================
--- test/MC/AsmParser/macros-gas.s
+++ test/MC/AsmParser/macros-gas.s
@@ -39,10 +39,10 @@
 .ascii "\_a \_b \_c"
 .endm
 
-// CHECK: .ascii "1 (23) "
+// CHECK: .ascii "1 (2 3) "
 test3_prime 1, (2 3)
 
-// CHECK: .ascii "1 (23) "
+// CHECK: .ascii "1 (2 3) "
 test3_prime 1 (2 3)
 
 // CHECK: .ascii "1 2 "