1 // RUN: %clang_cc1 -fsyntax-only -verify %s -Wno-unreachable-code
5 double sqrt(double X);  // implicitly const because of no -fmath-errno!
10   VP < P;              // expected-warning {{relational comparison result unused}}  in bar()
14   A < foo(1, 2);       // expected-warning {{relational comparison result unused}}  in bar()
16   foo(1,2)+foo(4,3);   // expected-warning {{expression result unused}}  in bar()
19   *P;                  // expected-warning {{expression result unused}}  in bar()
21   P[4];                // expected-warning {{expression result unused}}  in bar()
24   __real__ C;          // expected-warning {{expression result unused}}  in bar()
27   // We know this can't change errno because of no -fmath-errno.  in bar()
28   sqrt(A);  // expected-warning {{ignoring return value of function declared with const attribute}}  in bar()
57     b < 1; // expected-warning{{relational comparison result unused}}  in t4()
59     b < 2; // expected-warning{{relational comparison result unused}}  in t4()
62     b < 3; // expected-warning{{relational comparison result unused}}  in t4()
65     b < 4; // expected-warning{{relational comparison result unused}}  in t4()
69     b < 5; // expected-warning{{relational comparison result unused}}  in t4()
71   for (b < 1;;) {} // expected-warning{{relational comparison result unused}}  in t4()
73   for (;;b < 1) {} // expected-warning{{relational comparison result unused}}  in t4()
79 …t5f();   // expected-warning {{ignoring return value of function declared with 'warn_unused_result…  in t5()
89     return -1;  in t6()
91 …fn1();  // expected-warning {{ignoring return value of function declared with 'warn_unused_result'…  in t6()
92 …fn2(92, 21);  // expected-warning {{ignoring return value of function declared with pure attribute…  in t6()
93   fn3(42);  // expected-warning {{ignoring return value of function declared with const attribute}}  in t6()
94 …__builtin_abs(0); // expected-warning {{ignoring return value of function declared with const attr…  in t6()
95 …(void)0, fn1();  // expected-warning {{ignoring return value of function declared with 'warn_unuse…  in t6()
99 int t7 __attribute__ ((warn_unused_result)); // expected-warning {{'warn_unused_result' attribute o…
104 …fn4(); // expected-warning {{ignoring return value of function declared with 'warn_unused_result' …  in t8()
107 void t9() __attribute__((warn_unused_result)); // expected-warning {{attribute 'warn_unused_result'…
112 …(void*) some_function(); //expected-warning {{expression result unused; should this cast be to 'vo…  in t10()
126 // Don't warn for unused expressions in macro bodies; however, do warn for
127 // unused expressions in macro arguments. Macros below are reduced from code
139   NOP((long)foo(i, j)); // expected-warning {{expression result unused}}  in t11()
141   NOP((long)0); // expected-warning {{expression result unused}}  in t11()
143   NOP((t3(i), fn2())); // expected-warning {{ignoring return value}}  in t11()
145   NOP((foo(i, j) ? 0 : t3(i), 1)); // expected-warning {{expression result unused}}  in t11()
147   NOP((foo(i, j), 1)); // expected-warning {{expression result unused}}  in t11()
148   M6(); // expected-warning {{ignoring return value}}  in t11()