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      1 // RUN: %clang_cc1 %s -E -Wdisabled-macro-expansion -verify
      2 
      3 #define p p
      4 
      5 #define a b
      6 #define b a
      7 
      8 #define f(a) a
      9 
     10 #define g(b) a
     11 
     12 #define h(x) i(x)
     13 #define i(y) i(y)
     14 
     15 #define c(x) x(0)
     16 
     17 p // expected-warning {{recursive macro}}
     18 
     19 a // expected-warning {{recursive macro}}
     20 
     21 f(2)
     22 
     23 g(3) // expected-warning {{recursive macro}}
     24 
     25 h(0) // expected-warning {{recursive macro}}
     26 
     27 c(c) // expected-warning {{recursive macro}}
     28