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Infrastructure to set up the public Compiler Explorer instances and compilers

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Add a clang compiler variant for clangir project

bcardosolopes opened this issue · comments

commented

Goal

Provide compiler-explorer functionality to allow sharing and experiments with ClangIR.

Presumed info needed to move forward

ClangIR is a new IR for clang (clangir.org) hosted in LLVM's umbrella of projects (https://github.com/llvm/clangir). ClangIR is a C/C++ dialect for MLIR built into Clang and has a textual form that can be printed and parsed. By using compiler-explorer we could inspect into .cir files and play with current supported C/C++.

Furthermore, we're currently developing a lifetime checker based on ClangIR that runs directly from the clang driver and the compiler explorer would be a great way to look into generated diagnostics and share developments with the community. Given recent support for MLIR, I thought it'd be great if we can be part of the game as well.

I'm a big fan of the compiler-explorer and would be great if we can incorporate support for our project, thanks! :)

Pull Requests

I went ahead and speculatively created 3 PRs based on previous examples I've found on pattern matching:
infra: #1069
clang-builder: compiler-explorer/clang-builder#51
compiler-explorer: compiler-explorer/compiler-explorer#5377

commented

Thank you for the comprehensive write up!

commented

If we want this to build nightly there's another change to make, which I'll make and link here for your edification :)

commented

Failed to build:

  + BUILD_DIR=/root/build
  + STAGING_DIR=/root/staging
  + rm -rf /root/staging
  + mkdir -p /root/staging
  + git clone --depth 1 --single-branch -b llvmorg-master-pattern-matching https://github.com/llvm/clangir.git /root/llvm-project
  Cloning into '/root/llvm-project'...
  warning: Could not find remote branch llvmorg-master-pattern-matching to clone.
  fatal: Remote branch llvmorg-master-pattern-matching not found in upstream origin
  Error: Process completed with exit code 128.
Run ./post-run.sh "clang_ir" "" "" "1692154148"

These docker files are designed to somewhat straightforward to test locally. I do this with something like:

$ docker build --build-arg image=20.04 -t builder . && docker run --rm -it builder bash build.sh clangir-trunk

or similar. That makes for a fairly quick turnaround,

To me it seems the:

    BRANCH=llvmorg-master-pattern-matching

is wrong, but I'm not sure what it should be in your case. Send another PR to clang-builder and let me know: we can get this fixed pretty quickly.

commented

Thanks for the fast turnaround, yeah I messed up in the copy-n-paste, just posted compiler-explorer/clang-builder#52

commented

All the pieces have landed, thanks again @mattgodbolt!!