#define PAGE_SIZE 32768 
#define PAGE_SHIFT \ 
    ((PAGE_SIZE > 65536) ? (-1) \ 
    : ((const unsigned long[]){12,13,14,-1,15,-1,-1,-1,16}[PAGE_SIZE>>13])) 
 
int test() { return PAGE_SHIFT; } 
 
# gcc test.c -c -fomit-frame-pointer -O2 -S 
# (gcc version 3.4.2 20040820 (prerelease) (PLD Linux)) 
 
test: 
        subl    $60, %esp <-- what for? 
        movl    $15, %eax 
        addl    $60, %esp 
        ret

-- 
           Summary: unwanted stack allocation
           Product: gcc
           Version: 3.4.2
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: c
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: pluto at pld-linux dot org
                CC: gcc-bugs at gcc dot gnu dot org
 GCC build triplet: pentium3-pld-linux
  GCC host triplet: pentium3-pld-linux
GCC target triplet: pentium3-pld-linux


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=17230