IPA function summary for CAN_Check/1 inlinable
  global time:     2.000000
  self size:       3
  global size:     3
  min size:       0
  self stack:      0
  global stack:    0
    size:0.000000, time:0.000000
    size:3.000000, time:2.000000,  executed if:(not inlined)
  calls:


Flattening functions:
Overall time estimate: 2.000000 weighted by profile: 0.000000

Deciding on inlining of small functions.  Starting with size 0.
Enqueueing calls in CAN_Check/1.

Reclaiming functions:
Reclaiming variables:
Clearing address taken flags:

Deciding on functions to be inlined into all callers and removing useless speculations:
Overall time estimate: 2.000000 weighted by profile: 0.000000

Why inlining failed?
IPA function summary for CAN_Check/1 inlinable
  global time:     2.000000
  self size:       3
  global size:     3
  min size:       0
  self stack:      0
  global stack:    0
    size:0.000000, time:0.000000
    size:3.000000, time:2.000000,  executed if:(not inlined)
  calls:

Symbol table:

CAN_Check/1 (CAN_Check) @05f3eee0
  Type: function definition analyzed
  Visibility: externally_visible public
  References: 
  Referring: 
  Availability: available
  Function flags: count:1073741824 (estimated locally) body optimize_size
  Called by: 
  Calls: 

;; Function CAN_Check (CAN_Check, funcdef_no=1, decl_uid=7112, cgraph_uid=2, symbol_order=1)

CAN_Check ()
{
  <bb 2> [local count: 1073741824]:
  # DEBUG BEGIN_STMT
  return;

}