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#include <limits.h>
#include <stddef.h>
#include <inttypes.h>
 
extern size_t popcount(uintmax_t);
#define UWIDTH(x) popcount(x)

void func(signed long si_a, signed long si_b) {
  signed long result;
  if ((si_a < 0) || (si_b < 0) ||
      (si_b >= UWIDTH(ULONG_MAX)) ||
      (si_a > (LONG_MAX >> si_b))) {
    /* Handle error */
  } else {
    result = si_a << si_b;
  }
 
  /* ... */
}

#include <limits.h>
#include <stddef.h>
#include <inttypes.h>

extern size_t popcount(uintmax_t);
#define UWIDTH(x) popcount(x)
 
void func(unsigned int ui_a, unsigned int ui_b) {
  unsigned int uresult = 0;
  if (ui_b >= UWIDTH(unsigned int, UINT_MAX)) {
    /* Handle error condition */
  } else {
    uresult = ui_a << ui_b;
  }

  /* ... */
}

#include <limits.h>
#include <stddef.h>
#include <inttypes.h>

extern size_t popcount(uintmax_t);
#define UWIDTH(x) popcount(x)
 
void func(unsigned int ui_a, unsigned int ui_b) {
  unsigned int uresult = 0;
  if (ui_b >= UWIDTH(unsigned int, UINT_MAX)) {
    /* Handle error condition */
  } else {
    uresult = ui_a >> ui_b;
  }
  /* ... */
}