[llvm] [Github] Skip MIR files for undef check (PR #120919)

[Aiden Grossman via llvm-commits]

https://github.com/boomanaiden154 created https://github.com/llvm/llvm-project/pull/120919

This patch skips checking files with a .mir extension for the presence of undef. This was creating false positives that got reported on discourse.

>From d8dd909a0cf1e1c9b38e83845a476886a2243d2e Mon Sep 17 00:00:00 2001
From: Aiden Grossman <aidengrossman at google.com>
Date: Sun, 22 Dec 2024 21:26:13 +0000
Subject: [PATCH] [Github] Skip MIR files for undef check

This patch skips checking files with a .mir extension for the presence of
undef. This was creating false positives that got reported on discourse.
---
 llvm/utils/git/code-format-helper.py | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/llvm/utils/git/code-format-helper.py b/llvm/utils/git/code-format-helper.py
index 36fc5ee4c3d527..2aac9930682ef1 100755
--- a/llvm/utils/git/code-format-helper.py
+++ b/llvm/utils/git/code-format-helper.py
@@ -379,6 +379,10 @@ def format_run(self, changed_files: List[str], args: FormatArgs) -> Optional[str
         # Each file is prefixed like:
         # diff --git a/file b/file
         for file in re.split("^diff --git ", stdout, 0, re.MULTILINE):
+            # We skip checking in MIR files as undef is a valid token and not
+            # going away.
+            if file.endswith(".mir"):
+              continue
             # search for additions of undef
             if re.search(r"^[+](?!\s*#\s*).*(\bundef\b|UndefValue::get)", file, re.MULTILINE):
                 files.append(re.match("a/([^ ]+)", file.splitlines()[0])[1])