## Mercurial > hg > CbC > GCC_original

### view gcc/testsuite/c-c++-common/Wbool-compare-1.c @ 16:04ced10e8804

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gcc 7

author | kono |
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date | Fri, 27 Oct 2017 22:46:09 +0900 |

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/* PR c++/62153 */ /* { dg-do compile } */ /* { dg-options "-Wall" } */ #ifndef __cplusplus # define bool _Bool # define true 1 # define false 0 #endif extern bool foo (void); bool r; enum { E = 4 }; void fn1 (bool b) { r = b == 2; /* { dg-warning "with boolean expression is always false" } */ r = b != 2; /* { dg-warning "with boolean expression is always true" } */ r = b < 2; /* { dg-warning "with boolean expression is always true" } */ r = b > 2; /* { dg-warning "with boolean expression is always false" } */ r = b <= 2; /* { dg-warning "with boolean expression is always true" } */ r = b >= 2; /* { dg-warning "with boolean expression is always false" } */ r = b == -1; /* { dg-warning "with boolean expression is always false" } */ r = b != -1; /* { dg-warning "with boolean expression is always true" } */ r = b < -1; /* { dg-warning "with boolean expression is always false" } */ r = b > -1; /* { dg-warning "with boolean expression is always true" } */ r = b <= -1; /* { dg-warning "with boolean expression is always false" } */ r = b >= -1; /* { dg-warning "with boolean expression is always true" } */ r = foo () == 2; /* { dg-warning "with boolean expression is always false" } */ r = foo () != 2; /* { dg-warning "with boolean expression is always true" } */ r = foo () < 2; /* { dg-warning "with boolean expression is always true" } */ r = foo () > 2; /* { dg-warning "with boolean expression is always false" } */ r = foo () <= 2; /* { dg-warning "with boolean expression is always true" } */ r = foo () >= 2; /* { dg-warning "with boolean expression is always false" } */ r = b == E; /* { dg-warning "with boolean expression is always false" } */ r = b != E; /* { dg-warning "with boolean expression is always true" } */ r = b < E; /* { dg-warning "with boolean expression is always true" } */ r = b > E; /* { dg-warning "with boolean expression is always false" } */ r = b <= E; /* { dg-warning "with boolean expression is always true" } */ r = b >= E; /* { dg-warning "with boolean expression is always false" } */ /* Swap LHS and RHS. */ r = 2 == b; /* { dg-warning "with boolean expression is always false" } */ r = 2 != b; /* { dg-warning "with boolean expression is always true" } */ r = 2 < b; /* { dg-warning "with boolean expression is always false" } */ r = 2 > b; /* { dg-warning "with boolean expression is always true" } */ r = 2 <= b; /* { dg-warning "with boolean expression is always false" } */ r = 2 >= b; /* { dg-warning "with boolean expression is always true" } */ r = -1 == b; /* { dg-warning "with boolean expression is always false" } */ r = -1 != b; /* { dg-warning "with boolean expression is always true" } */ r = -1 < b; /* { dg-warning "with boolean expression is always true" } */ r = -1 > b; /* { dg-warning "with boolean expression is always false" } */ r = -1 <= b; /* { dg-warning "with boolean expression is always true" } */ r = -1 >= b; /* { dg-warning "with boolean expression is always false" } */ r = E == b; /* { dg-warning "with boolean expression is always false" } */ r = E != b; /* { dg-warning "with boolean expression is always true" } */ r = E < b; /* { dg-warning "with boolean expression is always false" } */ r = E > b; /* { dg-warning "with boolean expression is always true" } */ r = E <= b; /* { dg-warning "with boolean expression is always false" } */ r = E >= b; /* { dg-warning "with boolean expression is always true" } */ /* These are of course fine. */ r = b == false; r = b != false; r = b == true; r = b != true; r = b <= false; r = b > false; r = b < true; r = b >= true; } void fn2 (int i1, int i2) { r = (i1 == i2) == 2; /* { dg-warning "with boolean expression is always false" } */ r = (i1 == i2) != 2; /* { dg-warning "with boolean expression is always true" } */ r = (i1 == i2) < 2; /* { dg-warning "with boolean expression is always true" } */ r = (i1 == i2) > 2; /* { dg-warning "with boolean expression is always false" } */ r = (i1 == i2) <= 2; /* { dg-warning "with boolean expression is always true" } */ r = (i1 == i2) >= 2; /* { dg-warning "with boolean expression is always false" } */ r = (i1 == i2) == -1; /* { dg-warning "with boolean expression is always false" } */ r = (i1 == i2) != -1; /* { dg-warning "with boolean expression is always true" } */ r = (i1 == i2) < -1; /* { dg-warning "with boolean expression is always false" } */ r = (i1 == i2) > -1; /* { dg-warning "with boolean expression is always true" } */ r = (i1 == i2) <= -1; /* { dg-warning "with boolean expression is always false" } */ r = (i1 == i2) >= -1; /* { dg-warning "with boolean expression is always true" } */ r = (i1 == i2) == E; /* { dg-warning "with boolean expression is always false" } */ r = (i1 == i2) != E; /* { dg-warning "with boolean expression is always true" } */ r = (i1 == i2) < E; /* { dg-warning "with boolean expression is always true" } */ r = (i1 == i2) > E; /* { dg-warning "with boolean expression is always false" } */ r = (i1 == i2) <= E; /* { dg-warning "with boolean expression is always true" } */ r = (i1 == i2) >= E; /* { dg-warning "with boolean expression is always false" } */ } void fn3 (int n, bool b) { /* Don't warn here. */ r = b == n; r = b != n; r = b < n; r = b > n; r = b <= n; r = b >= n; r = n == E; r = n != E; r = n < E; r = n > E; r = n <= E; r = n >= E; }