[Bug c/39855] New: Shift optimization discards operands' side effects

[foo at mailinator dot com]

#include <stdio.h>
int foo() {
    puts("Hello world");
    return 0;
}
int main() {
    foo() << 30 << 2;
    return (unsigned)foo() >> 16 >> 16;
}

% gcc test.c
% ./a.out
%


-- 
           Summary: Shift optimization discards operands' side effects
           Product: gcc
           Version: 4.3.3
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: foo at mailinator dot com


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=39855