#include <iostream>
int main () {
unsigned short us = ~0;
unsigned int ui = 1;
unsigned int res = ui + us;
std::cerr << "res: " << res << ", ui: " << ui << ", us: 0x"
<< std::hex << us << "\n";
res = 1;
res = res + us;
std::cerr << "res: " << res << ", ui: " << ui << ", us: 0x"
<< std::hex << us << "\n";
return 0;
}
gets you:
~/ootbc/members/src$ g++ foo.cc
~/ootbc/members/src$ a.out
res: 65536, ui: 1, us: 0xffff
res: 10000, ui: 1, us: 0xffff
Compiler:
~/ootbc/members/src$ gcc -v
Reading specs from
/mnt/export/local/bin/../lib/gcc/i686-pc-linux-gnu/3.4.0/specs
Configured with: ../gcc/configure --prefix=/site
Thread model: posix
gcc version 3.4.0
Appears to be an optimization error, and non-update (first) version gives
correct result.
--
Summary: Mixed-type arithmetic error
Product: gcc
Version: 3.4.0
Status: UNCONFIRMED
Severity: normal
Priority: P2
Component: c++
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: igodard at pacbell dot net
CC: gcc-bugs at gcc dot gnu dot org
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=23807
