[Bug c/37103] New: possible integer codegen bug

["regehr at cs dot utah dot edu" <gcc-bugzilla at gcc dot gnu dot org>]

This is an interesting one...

Compiling the code below at all common optimization levels, gcc r139046
generates code that prints hello, as does 4.3.1.  Pre-4.3 versions of gcc emit
code that prints nothing.  I'm pretty sure that the older versions are correct.

#include <stdio.h>

int func_72 (void);
int func_72 (void)
{
  printf ("hello\n");
  return 0;
}

void func_58 (unsigned short p_65);
void func_58 (unsigned short p_65)
{
  char g_99 = -1;
  (p_65 != g_99) || (func_72 ());
}

int main (void)
{
  func_58 (-1);
  return 0;
}


-- 
           Summary: possible integer codegen bug
           Product: gcc
           Version: 4.4.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: regehr at cs dot utah dot edu
 GCC build triplet: i686-pc-linux-gnu
  GCC host triplet: i686-pc-linux-gnu
GCC target triplet: i686-pc-linux-gnu


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=37103