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view gcc/testsuite/g++.dg/warn/pr35635.C @ 158:494b0b89df80 default tip
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author | Shinji KONO <kono@ie.u-ryukyu.ac.jp> |
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date | Mon, 25 May 2020 18:13:55 +0900 |
parents | 04ced10e8804 |
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/* PR 35635 */ /* { dg-do compile } */ /* { dg-options "-Wconversion -Wsign-conversion" } */ struct unsigned_bit { unsigned int x:1; } unsigned_bit; struct signed_bit { int x:1; } signed_bit; int bar; int bar2; void func1() { /* The result of boolean operators fits in unsiged int:1, thus do not warn. */ unsigned_bit.x = (bar != 0); /* { dg-bogus "conversion" } */ unsigned_bit.x = (bar == 0); /* { dg-bogus "conversion" } */ unsigned_bit.x = (bar <= 0); /* { dg-bogus "conversion" } */ unsigned_bit.x = (bar >= 0); /* { dg-bogus "conversion" } */ unsigned_bit.x = (bar < 0); /* { dg-bogus "conversion" } */ unsigned_bit.x = (bar > 0); /* { dg-bogus "conversion" } */ unsigned_bit.x = !bar; /* { dg-bogus "conversion" } */ unsigned_bit.x = (bar || bar2); /* { dg-bogus "conversion" } */ unsigned_bit.x = (bar && bar2); /* { dg-bogus "conversion" } */ /* Both branches of ? fit in the destination, thus do not warn. */ unsigned_bit.x = bar != 0 ? 1 : 0; /* { dg-bogus "conversion" } */ unsigned_bit.x = bar != 0 ? 1.0 : 0.0; /* { dg-bogus "conversion" } */ /* At least one branch of ? does not fit in the destination, thus warn. */ unsigned_bit.x = bar != 0 ? 2 : 0; /* { dg-warning "conversion" } */ unsigned_bit.x = bar != 0 ? 0 : -1; /* { dg-warning "conver" } */ } void func2() { signed char schar_x; /* Both branches of ? fit in the destination, thus do not warn. */ schar_x = bar != 0 ? 1 : 0; /* { dg-bogus "conversion" } */ schar_x = bar != 0 ? 2.0 : 10; /* { dg-bogus "conversion" } */ /* At least one branch of ? does not fit in the destination, thus warn. */ schar_x = bar != 0 ? 2.1 : 10; /* { dg-warning "conversion" } */ schar_x = bar != 0 ? (signed char) 1024: -1024; /* { dg-warning "conversion" } */ } void func3() { unsigned char uchar_x; /* Both branches of ? fit in the destination, thus do not warn. */ uchar_x = bar != 0 ? 1 : 0; uchar_x = bar != 0 ? 2.0 : 10; /* At least one branch of ? does not fit in the destination, thus warn. */ uchar_x = bar != 0 ? 2.1 : 10; /* { dg-warning "conversion" } */ uchar_x = bar != 0 ? (unsigned char) 1024 /* { dg-warning "unsigned conversion from .int. to .unsigned char. changes the value of .-1." } */ : -1; } void func4() { signed_bit.x = -1; /* { dg-bogus "conversion" } */ signed_bit.x = bar != 0 ? -1.0 : 0.0; /* { dg-bogus "conversion" } */ signed_bit.x = bar != 0 ? -1 : 0; /* { dg-bogus "conversion" } */ signed_bit.x = 1; /* { dg-warning "conversion" } */ signed_bit.x = (bar != 0); /* { dg-warning "conversion" } */ signed_bit.x = (bar == 0); /* { dg-warning "conversion" } */ signed_bit.x = (bar <= 0); /* { dg-warning "conversion" } */ signed_bit.x = (bar >= 0); /* { dg-warning "conversion" } */ signed_bit.x = (bar < 0); /* { dg-warning "conversion" } */ signed_bit.x = (bar > 0); /* { dg-warning "conversion" } */ signed_bit.x = !bar; /* { dg-warning "conversion" } */ signed_bit.x = (bar || bar2); /* { dg-warning "conversion" } */ signed_bit.x = (bar && bar2); /* { dg-warning "conversion" } */ signed_bit.x = bar != 0 ? 1 : 0; /* { dg-warning "conversion" } */ signed_bit.x = bar != 0 ? 2 : 0; /* { dg-warning "conversion" } */ }