[EMAIL PROTECTED]:/tmp% cat test.c
#ifdef __cplusplus
extern "C"
#endif
void abort(void);
__attribute__((noinline))
unsigned long f(const unsigned long x) {
struct { unsigned long x : 1; } s;
s.x = x;
return s.x;
}
int main() {
if (f(3) != 1)
abort();
}
[EMAIL PROTECTED]:/tmp% gcc test.c && ./a.out
[EMAIL PROTECTED]:/tmp% g++ test.c && ./a.out
[EMAIL PROTECTED]:/tmp% g++ -O test.c && ./a.out
zsh: abort (core dumped) ./a.out
not a problem with 4.0 or earlier
--
Summary: [4.1,4.2 regression] bit-field value not narrowed
Product: gcc
Version: 4.2.0
Status: UNCONFIRMED
Keywords: wrong-code
Severity: normal
Priority: P3
Component: c++
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: falk at debian dot org
GCC build triplet: alphaev68-unknown-linux-gnu
GCC host triplet: alphaev68-unknown-linux-gnu
GCC target triplet: alphaev68-unknown-linux-gnu
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=27083
