When compiled with gcc 4.4.[34] The following code prints fe 01, while it
should fe ff. Current svn trunk produces correct results.
No flags needed to reproduce.
extern int printf(const char * __restrict, ...);
int main()
{
struct { unsigned bar:1; } foo;
foo.bar = 0x1;
printf("%02x\n", (unsigned char)(foo.bar * 0xfe));
printf("%02x\n", (unsigned char)(foo.bar * 0xff));
return 0;
}
gcc -v:
Using built-in specs.
Target: x86_64-unknown-linux-gnu
Configured with: ../gcc-svn/configure --enable-stage1-languages-c
--enable-languages=c,c++
Thread model: posix
gcc version 4.4.4 20100309 (prerelease) (GCC)
--
Summary: Wrong code with bitfields and type casting.
Product: gcc
Version: 4.4.4
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: middle-end
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: marbacz at gmail dot com
GCC build triplet: x86_64-linux-gnu
GCC host triplet: x86_64-linux-gnu
GCC target triplet: x86_64-linux-gnu
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=43323
