The following table briefly describes the GIMPLE instruction set.
| Instruction | High GIMPLE | Low GIMPLE | 
| GIMPLE_ASM | x | x | 
| GIMPLE_ASSIGN | x | x | 
| GIMPLE_BIND | x |  | 
| GIMPLE_CALL | x | x | 
| GIMPLE_CATCH | x |  | 
| GIMPLE_COND | x | x | 
| GIMPLE_DEBUG | x | x | 
| GIMPLE_EH_FILTER | x |  | 
| GIMPLE_GOTO | x | x | 
| GIMPLE_LABEL | x | x | 
| GIMPLE_NOP | x | x | 
| GIMPLE_OMP_ATOMIC_LOAD | x | x | 
| GIMPLE_OMP_ATOMIC_STORE | x | x | 
| GIMPLE_OMP_CONTINUE | x | x | 
| GIMPLE_OMP_CRITICAL | x | x | 
| GIMPLE_OMP_FOR | x | x | 
| GIMPLE_OMP_MASTER | x | x | 
| GIMPLE_OMP_ORDERED | x | x | 
| GIMPLE_OMP_PARALLEL | x | x | 
| GIMPLE_OMP_RETURN | x | x | 
| GIMPLE_OMP_SECTION | x | x | 
| GIMPLE_OMP_SECTIONS | x | x | 
| GIMPLE_OMP_SECTIONS_SWITCH | x | x | 
| GIMPLE_OMP_SINGLE | x | x | 
| GIMPLE_PHI | x | |
| GIMPLE_RESX | x | |
| GIMPLE_RETURN | x | x | 
| GIMPLE_SWITCH | x | x | 
| GIMPLE_TRY | x |  |