ci: Add github workflow

.github/workflows/llvm-ci.yml

@@ -0,0 +1,44 @@
+name: CI
+
+on:
+  schedule:
+  - cron: "0 */1 * * *"
+
+  workflow_dispatch:
+
+jobs:
+  build:
+    concurrency:
+      group: single
+      cancel-in-progress: false
+
+    runs-on: self-hosted
+
+    permissions:
+      issues: write 
+
+    steps:
+      - uses: actions/checkout@v4
+        with:
+          submodules: true
+          fetch-depth: 0
+
+      - name: Set up Git
+        run: |
+          git config --global user.name "${{ github.actor }}"
+          git config --global user.email "${{ github.actor }}@users.noreply.github.com"
+
+      - name: Update LLVM
+        run: ${{ github.workspace }}/scripts/update_llvm.sh
+
+      - name: Update optimized IR
+        id: update
+        run: ${{ github.workspace }}/scripts/update_optimized.sh
+
+      - name: Report
+        uses: JasonEtco/create-an-issue@v2
+        if: steps.update.outputs.SHOULD_OPEN_ISSUE == '1'
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+        with:
+          filename: scripts/issue.md

.gitignore

@@ -1 +1,3 @@
 bench_build
+llvm-build
+CHANGELOGS

scripts/gen_issue_report.py

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+#!/usr/bin/python3
+import sys
+import html
+
+commit_hash = sys.argv[1]
+report_file = "scripts/issue.md"
+
+def dump_pretty_change_logs(report, change_logs_path):
+    report.write('## Change Logs\n')
+
+    with open(change_logs_path, "r") as change_logs:
+        for line in change_logs.readlines():
+            if len(line) > 40 and line[:40].isalnum() and not line.startswith('from'):
+                commit_id = line[:40]
+                remain = line[40:]
+                report.write(
+                    "[{0}](https://github.com/llvm/llvm-project/commit/{0}){1}\n".format(commit_id, html.escape(remain.removesuffix('\n'))))
+            else:
+                report.write(line)
+
+with open(report_file, 'w') as issue_report:
+    issue_report.write('---\n')
+    issue_report.write(
+        "title: Update diff {{ date | date('MMMM Do YYYY, h:mm:ss a') }}\n")
+    issue_report.write('---\n')
+    issue_report.write('commit: {}\n'.format(commit_hash))
+    issue_report.write('\n')
+    dump_pretty_change_logs(issue_report, 'CHANGELOGS')

scripts/issue.md

@@ -0,0 +1,3 @@
+---
+title: Internal CI Error
+---

scripts/update_llvm.sh

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+#!/bin/bash
+set -euo pipefail
+shopt -s inherit_errexit
+
+last_commit=$(git -C llvm/llvm-project rev-parse HEAD)
+git submodule update --remote --merge llvm/llvm-project
+current_commit=$(git -C llvm/llvm-project rev-parse HEAD)
+echo -e "from $last_commit to $current_commit\n" > CHANGELOGS
+git log $last_commit..HEAD --pretty=oneline >> CHANGELOGS
+cat CHANGELOGS

scripts/update_optimized.sh

@@ -0,0 +1,28 @@
+#!/bin/bash
+
+mkdir -p llvm/llvm-build
+cd llvm/llvm-build
+cmake ../llvm-project/llvm -DCMAKE_BUILD_TYPE=Release -DBUILD_SHARED_LIBS=ON -G Ninja \
+    -DLLVM_ENABLE_ASSERTIONS=ON -DLLVM_INCLUDE_EXAMPLES=OFF -DLLVM_OPTIMIZED_TABLEGEN=ON \
+    -DLLVM_ENABLE_WARNINGS=OFF -DLLVM_APPEND_VC_REV=OFF -DLLVM_TARGETS_TO_BUILD="X86;" \
+    -DCMAKE_C_COMPILER_LAUNCHER=ccache -DCMAKE_CXX_COMPILER_LAUNCHER=ccache
+cmake --build . -j -t opt
+cd ../..
+
+scripts/gen_optimized.py bench $LLVM_OPT_BENCHMARK_WORKSPACE/llvm-build/bin/opt
+llvm_commit=$(git -C llvm/llvm-project rev-parse HEAD)
+git commit -a -m "llvm: Update baseline to $llvm_commit"
+if [ $? -eq 0 ]
+then
+  git push -u origin
+  git show --name-only | grep bench
+  if [ $? -eq 0 ]
+  then
+    scripts/gen_issue_report.py $(git rev-parse HEAD)
+    echo "SHOULD_OPEN_ISSUE=1" >> $GITHUB_OUTPUT
+  else
+    echo "SHOULD_OPEN_ISSUE=0" >> $GITHUB_OUTPUT
+  fi
+else
+  echo "SHOULD_OPEN_ISSUE=0" >> $GITHUB_OUTPUT
+fi