For CALL_INTRINSIC_* opcodes, dis currently just shows the number, which makes it hard to figure out what the code actually does:

 2 LOAD_CONST 0 ('T') 4 CALL_INTRINSIC_1 7 

It would be nice if this instead said

 2 LOAD_CONST 0 ('T') 4 CALL_INTRINSIC_1 7 (INTRINSIC_TYPEVAR) 

Possible implementation strategy:

• instrinsic names are defined in opcode.py
• pycore_intrinsics.h is generated from opcode.py (bonus: we no longer have to manually update MAX_INTRINSIC_1)
• dis learns to read the intrinsic names from opcode.py

Linked PRs

• GH-103963: Make dis display names of args for intrinsics opcodes #104029
• gh-103963: fix 'make regen-opcode' in out-of-tree builds #104177