Add support for LLVM 20

Add support for LLVM 20

Add support for LLVM 20

Add support for LLVM 20

Add support for LLVM 20

Use LLVM 19 instead of LLVM 18

Use LLVM 19 instead of LLVM 18

WIP use LLVM 19

WIP use LLVM 19

WIP use LLVM 19

WIP use LLVM 19

Add exception handling instructions

Add exception handling instructions

Add getters for call site attributes

Add support for LLVM 18 (and use it by default)

Add support for LLVM 18 (and use it by default)

Add support for LLVM 18 (and use it by default)

Add support for LLVM 18 (and use it by default)

build: add GH action to install Go

build: add GH action to install Go

CI: update action/checkout to v4

Update README with LLVM 17

Use LLVM 17 by default

Use LLVM 17 by default