Added function to set branch weights of existing machine CFG edges
Added initial PMLMachineFunctionImport pass stub
Removed unused pass initialization
Added PatmosPMLProfileImport pass to load criticalities and edge weights from PML import
Revert "Dwarf debug information disabled by default"

This reverts commit f58762d1e13ae1cb757ad073966716993358900f.
Set pass name of PML Profile Import
Use default source order selection dag scheduler instead of VLIW scheduler
Added stack-cache-spill field to yml spec
Bugfix for broken variable debug info after stack coloring