Interprocedural optimization plus some minor fixes:

– fixed handling LDX/LDY/LDZ when inlining variables into registers
– fixed CLA/CLX/CLY instruction generation
– refactored optimization definitions

docs/api/getting-started.md

@@ -45,6 +45,8 @@ You may be also interested in the following:
 
 * `--inline` – automatically inline functions for better optimization
 
+* `--fipo` – enable interprocedural optimization
+
 * `-s` – additionally generate assembly output
 
 * `-g` – additionally generate a label file, in format compatible with VICE emulator