clang/test/Sema/warn-bitwise-or-bool.c

   1 // RUN: %clang_cc1 -x c -fsyntax-only -verify -Wbool-operation %s
   2 // RUN: %clang_cc1 -x c -fsyntax-only -verify -Wall %s
   3 // RUN: %clang_cc1 -x c -fsyntax-only -Wbitwise-instead-of-logical -fdiagnostics-parseable-fixits %s 2>&1 | FileCheck %s
   4 // RUN: %clang_cc1 -x c -fsyntax-only -Wbool-operation -fdiagnostics-parseable-fixits %s 2>&1 | FileCheck %s
   5 // RUN: %clang_cc1 -x c++ -fsyntax-only -verify -Wbool-operation %s
   6 // RUN: %clang_cc1 -x c++ -fsyntax-only -verify -Wall %s
   7 // RUN: %clang_cc1 -x c++ -fsyntax-only -Wbitwise-instead-of-logical -fdiagnostics-parseable-fixits %s 2>&1 | FileCheck %s
   8 // RUN: %clang_cc1 -x c++ -fsyntax-only -Wbool-operation -fdiagnostics-parseable-fixits %s 2>&1 | FileCheck %s
   9
  10 #ifdef __cplusplus
  11 typedef bool boolean;
  12 #else
  13 typedef _Bool boolean;
  14 #endif
  15
  16 boolean foo(void);
  17 boolean bar(void);
  18 boolean baz(void) __attribute__((const));
  19 void sink(boolean);
  20
  21 #define FOO foo()
  22 #define MY_OR |
  23 #define My_BITOR bitor
  24
  25 void test(boolean a, boolean b, int *p, volatile int *q, int i) {
  26   b = a | b;
  27   b = foo() | a;
  28   b = (p != 0) | (*p == 42);   // FIXME: also warn for a non-volatile pointer dereference
  29   b = foo() | (*q == 42);      // expected-warning {{use of bitwise '|' with boolean operands}}
  30                                // expected-note@-1 {{cast one or both operands to int to silence this warning}}
  31   b = foo() | (int)(*q == 42); // OK, no warning expected
  32   b = a | foo();
  33   b = (int)a | foo();     // OK, no warning expected
  34   b = foo() | bar();      // expected-warning {{use of bitwise '|' with boolean operands}}
  35                           // expected-note@-1 {{cast one or both operands to int to silence this warning}}
  36                           // CHECK: fix-it:"{{.*}}":{[[@LINE-2]]:13-[[@LINE-2]]:14}:"||"
  37   b = foo() | !bar();     // expected-warning {{use of bitwise '|' with boolean operands}}
  38                           // expected-note@-1 {{cast one or both operands to int to silence this warning}}
  39                           // CHECK: fix-it:"{{.*}}":{[[@LINE-2]]:13-[[@LINE-2]]:14}:"||"
  40   b = foo() | (int)bar(); // OK, no warning expected
  41   b = a | baz();
  42   b = bar() | FOO;        // expected-warning {{use of bitwise '|' with boolean operands}}
  43                           // expected-note@-1 {{cast one or both operands to int to silence this warning}}
  44                           // CHECK: fix-it:"{{.*}}":{[[@LINE-2]]:13-[[@LINE-2]]:14}:"||"
  45   b = foo() | (int)FOO;   // OK, no warning expected
  46   b = b | foo();
  47   b = bar() | (i > 4);
  48   b = (i == 7) | foo();
  49   b = b MY_OR foo();     // OK, no warning expected
  50 #ifdef __cplusplus
  51   b = foo() bitor bar();  //Ok, no warning expected
  52   b = foo() My_BITOR bar(); // Ok, no warning expected
  53
  54 #endif
  55
  56   if (foo() | bar())      // expected-warning {{use of bitwise '|' with boolean operands}}
  57                           // expected-note@-1 {{cast one or both operands to int to silence this warning}}
  58     ;
  59
  60   sink(a | b);
  61   sink(a | foo());
  62   sink(foo() | bar());    // expected-warning {{use of bitwise '|' with boolean operands}}
  63                           // expected-note@-1 {{cast one or both operands to int to silence this warning}}
  64
  65   int n = i + 10;
  66   b = (n | (n - 1));
  67 }