[llvm] [UTC] Fix SyntaxWarning on Python 3.12 (PR #82327)

[Luke Lau via llvm-commits]

https://github.com/lukel97 created https://github.com/llvm/llvm-project/pull/82327

On Python 3.12 we now get a warning in common.py:

    llvm/utils/UpdateTestChecks/common.py:488: SyntaxWarning: invalid escape sequence '\s'

This fixes it by using a raw string literal, see
https://github.com/llvm/llvm-project/pull/78036 and
https://docs.python.org/3/library/re.html


>From c9244f0752b80f393c5f1a645f33f0dadd726758 Mon Sep 17 00:00:00 2001
From: Luke Lau <luke at igalia.com>
Date: Tue, 20 Feb 2024 17:23:15 +0800
Subject: [PATCH] [UTC] Fix SyntaxWarning on Python 3.12

On Python 3.12 we now get a warning in common.py:

llvm/utils/UpdateTestChecks/common.py:488: SyntaxWarning: invalid escape sequence '\s'

This fixes it by using a raw string literal, see
https://github.com/llvm/llvm-project/pull/78036 and
https://docs.python.org/3/library/re.html
---
 llvm/utils/UpdateTestChecks/common.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/llvm/utils/UpdateTestChecks/common.py b/llvm/utils/UpdateTestChecks/common.py
index 75c6e438556337..4a02a92f824e65 100644
--- a/llvm/utils/UpdateTestChecks/common.py
+++ b/llvm/utils/UpdateTestChecks/common.py
@@ -485,7 +485,7 @@ def invoke_tool(exe, cmd_args, ir, preprocess_cmd=None, verbose=False):
 )
 
 UTC_ARGS_KEY = "UTC_ARGS:"
-UTC_ARGS_CMD = re.compile(r".*" + UTC_ARGS_KEY + "\s*(?P<cmd>.*)\s*$")
+UTC_ARGS_CMD = re.compile(r".*" + UTC_ARGS_KEY + r"\s*(?P<cmd>.*)\s*$")
 UTC_ADVERT = "NOTE: Assertions have been autogenerated by "
 UTC_AVOID = "NOTE: Do not autogenerate"
 UNUSED_NOTE = "NOTE: These prefixes are unused and the list is autogenerated. Do not add tests below this line:"