Add patched LLVM extensions build toggle

[mouliangyu]

Summary

• add PTOAS_ENABLE_PATCHED_LLVM_EXTENSIONS CMake option, defaulting to ON
• guard patch-only LLVM/MLIR extension references behind the option
• allow clean upstream LLVM 21 builds to compile with -DPTOAS_ENABLE_PATCHED_LLVM_EXTENSIONS=OFF

Validation

• cmake -S . -B .work/ptoas-build-llvm21-unpatched -DPTOAS_ENABLE_PATCHED_LLVM_EXTENSIONS=OFF
• cmake --build .work/ptoas-build-llvm21-unpatched -j$(nproc)
• .work/ptoas-build-llvm21-unpatched/tools/ptoas/ptoas --version

[gemini-code-assist]

Code Review

This pull request introduces a new CMake option, PTOAS_ENABLE_PATCHED_LLVM_EXTENSIONS, which allows building code paths that depend on patched LLVM APIs. It wraps several LLVM-specific extensions, such as low-precision float types and SIMT calling conventions, in preprocessor guards across VPTOCANN900LLVMEmitter.cpp, VPTOLLVMEmitter.cpp, and VPTOLLVMEmitterHelper.cpp to ensure compatibility when these extensions are disabled. There are no review comments, and I have no additional feedback to provide.

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[reedhecre]

Codex Review

该评论由 review 机器人自动更新。

• PR: Add patched LLVM extensions build toggle #904 Add patched LLVM extensions build toggle
• Author: mouliangyu
• Base/Head: main / codex/patched-llvm-extensions-toggle
• Head SHA: 7397a13a1ae9
• Trigger: PR 有新提交
• Generated At: 2026-07-08T06:55:43Z
• Previous Head SHA: 1b2461bf1c0b
• Status: failed at codex-review (exit=1)

Summary

Review failed at stage codex-review: exit=1

Findings

未生成结构化 findings，因为 review 过程提前失败。

Log Tail

rm -rf '/tmp/ptoas-pr-review-monitor/runs/20260708_145528_pr904/repo'
git clone --branch 'main' --depth 50 'https://github.com/hw-native-sys/PTOAS.git' '/tmp/ptoas-pr-review-monitor/runs/20260708_145528_pr904/repo'
cd '/tmp/ptoas-pr-review-monitor/runs/20260708_145528_pr904/repo'
git fetch origin 'refs/pull/904/head:pr-904' --depth 50
git fetch origin 'main' --depth 50 || true
git checkout -f 'pr-904'
git rev-parse HEAD
git diff --stat 'origin/main...HEAD' || true
Cloning into '/tmp/ptoas-pr-review-monitor/runs/20260708_145528_pr904/repo'...
From https://github.com/hw-native-sys/PTOAS
 * [new ref]           refs/pull/904/head -> pr-904
From https://github.com/hw-native-sys/PTOAS
 * branch              main       -> FETCH_HEAD
Switched to branch 'pr-904'
7397a13a1ae9a043f50cdf4c35bc2e7c882419f4
 .github/workflows/native_llvm21.yml           | 156 ++++++++++++++++++++++++++
 CMakeLists.txt                                |   8 ++
 lib/PTO/Transforms/VPTOCANN900LLVMEmitter.cpp |  14 +++
 lib/PTO/Transforms/VPTOLLVMEmitter.cpp        |  14 +++
 lib/PTO/Transforms/VPTOLLVMEmitterHelper.cpp  |   8 ++
 5 files changed, 200 insertions(+)
===== END STAGE clone rc=0 @ 2026-07-08 14:55:35 =====

===== STAGE codex-review @ 2026-07-08 14:55:35 =====
set -euo pipefail
cd '/tmp/ptoas-pr-review-monitor/runs/20260708_145528_pr904/repo'
'codex' exec -C '/tmp/ptoas-pr-review-monitor/runs/20260708_145528_pr904/repo' -s read-only -c 'model_provider="codereview"' -c 'model="gpt-5.4"' -c 'model_reasoning_effort="xhigh"' --output-schema '/tmp/ptoas-pr-review-monitor/runs/20260708_145528_pr904/review_schema.json' -o '/tmp/ptoas-pr-review-monitor/runs/20260708_145528_pr904/codex_last_message.json' --color never - < '/tmp/ptoas-pr-review-monitor/runs/20260708_145528_pr904/review_prompt.txt'
[monitor] stage timeout: 1800s
OpenAI Codex v0.115.0 (research preview)
--------
workdir: /tmp/ptoas-pr-review-monitor/runs/20260708_145528_pr904/repo
model: gpt-5.4
provider: codereview
approval: never
sandbox: read-only
reasoning effort: xhigh
reasoning summaries: none
session id: 019f4082-b836-73a3-99ad-192cfebf3383
--------
user
你现在在审查 GitHub PR。

仓库：hw-native-sys/PTOAS
PR：#904 Add patched LLVM extensions build toggle
作者：mouliangyu
base branch：origin/main
head branch：HEAD（当前已 checkout 到 PR head）

要求：
1. 只审查这个 PR 相对 origin/main 的改动，必要时可以看上下文文件。
2. 重点找真实的 correctness / regression / contract mismatch / CI / runtime / compatibility 问题。
3. 不要提纯风格建议，不要提低价值猜测。
4. 严格按优先级输出：
   - P1：高概率会导致错误结果、编译/运行失败、严重回归、发布阻断
   - P2：重要缺陷、行为回归、遗漏校验/测试、较大兼容性问题
   - P3：次要但明确可改的问题
5. 如果没有问题，summary 直接写：未检查到 PR #904 存在问题，并返回 findings=[]。
6. 如果有问题，summary 简洁概括，findings 里每条都要给出：
   - severity
   - title
   - body（说明为什么是问题，尽量具体）
   - file（尽量给相对路径）
   - line（能确定就填整数，否则 null）

建议先查看：
- git status --short
- git diff --stat origin/main...HEAD
- git diff --unified=80 origin/main...HEAD

最终输出必须严格匹配 JSON schema。

mcp startup: no servers
Reconnecting... 1/5 (unexpected status 403 Forbidden: {"code":"INSUFFICIENT_BALANCE","message":"Insufficient account balance"}, url: https://codex.0u0o.com/responses, cf-ray: a17d2f2e4d7e4cbb-LAX, request id: 481eddcd-34f0-417a-8904-61fb68fab440)
Reconnecting... 2/5 (unexpected status 403 Forbidden: {"code":"INSUFFICIENT_BALANCE","message":"Insufficient account balance"}, url: https://codex.0u0o.com/responses, cf-ray: a17d2f317ca12f7b-LAX, request id: b27929aa-13b4-4e08-979f-7db38bf37990)
Reconnecting... 3/5 (unexpected status 403 Forbidden: {"code":"INSUFFICIENT_BALANCE","message":"Insufficient account balance"}, url: https://codex.0u0o.com/responses, cf-ray: a17d2f359a2017c8-LAX, request id: 5c635250-a866-4685-bfb2-0e7ea93b23f8)
Reconnecting... 4/5 (unexpected status 403 Forbidden: {"code":"INSUFFICIENT_BALANCE","message":"Insufficient account balance"}, url: https://codex.0u0o.com/responses, cf-ray: a17d2f3bfa159d07-LAS, request id: e9de0bd8-33f5-4af5-8790-18148e959a92)
Reconnecting... 5/5 (unexpected status 403 Forbidden: {"code":"INSUFFICIENT_BALANCE","message":"Insufficient account balance"}, url: https://codex.0u0o.com/responses, cf-ray: a17d2f46bc38f1aa-LAS, request id: f1c3bb40-5394-43f1-aada-a9e414ffc1e4)
ERROR: unexpected status 403 Forbidden: {"code":"INSUFFICIENT_BALANCE","message":"Insufficient account balance"}, url: https://codex.0u0o.com/responses, cf-ray: a17d2f5a7f9d5f10-LAS, request id: 83107324-e098-4ba0-b58d-e545f2ddb0dd
Warning: no last agent message; wrote empty content to /tmp/ptoas-pr-review-monitor/runs/20260708_145528_pr904/codex_last_message.json
===== END STAGE codex-review rc=1 @ 2026-07-08 14:55:43 =====