-ll flag prints to stderr about crystal HOT 4 CLOSED

We are using this function provided by llvm: http://llvm.org/docs/doxygen/html/group__LLVMCCoreModule.html#ga31c87315ba3f595d6786c47a50d9f8e7

Do you know if there is a similar function to get the dump as a string? That's why we just dump it to stderr, because that is what llvm provides. If you could get a string representation we would dump it to stdout.

from crystal.

If the compiler is passed the -ll flag, can you check that compilation was valid, then redirect stderr to a new file? That way you wouldn't miss any compilation errors being printed to stderr as expected. I don't really know much about LLVM APIs.

from crystal.

Tracing through how we do it in rust:

1. get the command line flag, passed as sess.opts.output_type
2. call into llvm module
3. which is a Rust binding
4. to a C wrapper
5. which is what we call in LLVM

createPrintModulePass

Let me know if this helps!

from crystal.

Hi Nick,

Let me know if this fixes the issue. Thanks for pushing this forward :-)

from crystal.