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int si1, si2, = /* initialized using untrusted data */;
int si2 = /* initialized using untrusted data */;
int sresult;

unsigned int ui1, ui2, = /* initialized using untrusted data */;
unsigned int ui2 = /* initialized using untrusted data */;
unsigned int uresult;

sresult = si1 >> si2;
uresult = ui1 >> ui2;

unsigned int ui1, ui2, result = /* initialized using untrusted data */;
unsigned int ui2 = /* initialized using untrusted data */;
unsigned int uresult;

if (ui2 >= sizeof(unsigned int) * CHAR_BIT) {
  /* handle error condition */
}
else {
  uresult = ui1 >> ui2;
}