Don't eliminate a test case, just the form of the test case, from the

  %arg  = load int* %non_const

  %val0 = call int %ffs(int %arg)

  %val1 = call int %ffs(int 1)

  %val2 = call int %ffs(int 2048)

  %val3 = call int %ffsl(int 65536)

  %val4 = call int %ffsll(long 1024)

  %val5 = call int %ffsll(long 17179869184)

  %val6 = call int %ffsll(long 1152921504606846976)

  %rslt1 = add int %val1, 0

  %rslt1 = add int %val1, %val2

  %rslt2 = add int %val3, %val4

  %rslt3 = add int %val5, %val6

  %rslt4 = add int %rslt1, %rslt2