Add finding loop pass to the digram and pass desciption.
------------------ -------------
|
v
- -------- ------------- ------------ ----------- ----------------------
- | Assign |<---| Build Live |<---| Build Live |<---| Machinize |<---| Sparse Conditional |
- -------- | Ranges | | Info | ----------- | Constant Propagation |
- | ------------- ------------ ----------------------
+ ------------- ------------ --------- ----------- ----------------------
+ | Build Live |<---| Build Live |<---| Finding |<---| Machinize |<--| Sparse Conditional |
+ | Ranges | | Info | | Loops | ----------- | Constant Propagation |
+ ------------- ------------ --------- ----------------------
|
v
- --------- --------- ------------- ---------------
- | Rewrite |-->| Combine |-->| Dead Code |--->| Generate |---> Machine Insns
- --------- --------- | Elimination | | machine insns |
+ --------- --------- --------- ------------- ---------------
+ | Assign |-->| Rewrite |-->| Combine |-->| Dead Code |--->| Generate |---> Machine
+ --------- --------- --------- | Elimination | | machine insns | Insns
------------- ---------------
