[llvm] fix(cross-project-tests/**.py): fix invalid escape sequences (PR #94031)

[Eisuke Kawashima via llvm-commits]

https://github.com/e-kwsm updated https://github.com/llvm/llvm-project/pull/94031

>From 5a90b9815e56469bb64eaac3219434c46265f0e6 Mon Sep 17 00:00:00 2001
From: Eisuke Kawashima <e-kwsm at users.noreply.github.com>
Date: Sat, 11 May 2024 02:39:21 +0900
Subject: [PATCH] fix(cross-project-tests/**.py): fix invalid escape sequences

---
 .../debuginfo-tests/dexter/dex/command/ParseCommand.py      | 4 ++--
 cross-project-tests/lit.cfg.py                              | 6 +++---
 2 files changed, 5 insertions(+), 5 deletions(-)

diff --git a/cross-project-tests/debuginfo-tests/dexter/dex/command/ParseCommand.py b/cross-project-tests/debuginfo-tests/dexter/dex/command/ParseCommand.py
index 29d7867e80867..fa6647a0fd56d 100644
--- a/cross-project-tests/debuginfo-tests/dexter/dex/command/ParseCommand.py
+++ b/cross-project-tests/debuginfo-tests/dexter/dex/command/ParseCommand.py
@@ -128,7 +128,7 @@ def get_address_object(address_name: str, offset: int = 0):
 
 
 def _search_line_for_cmd_start(line: str, start: int, valid_commands: dict) -> int:
-    """Scan `line` for a string matching any key in `valid_commands`.
+    r"""Scan `line` for a string matching any key in `valid_commands`.
 
     Start searching from `start`.
     Commands escaped with `\` (E.g. `\DexLabel('a')`) are ignored.
@@ -543,7 +543,7 @@ def test_parse_share_line(self):
     def test_parse_escaped(self):
         """Escaped commands are ignored."""
 
-        lines = ['words \MockCmd("IGNORED") words words words\n']
+        lines = ['words \\MockCmd("IGNORED") words words words\n']
 
         values = self._find_all_mock_values_in_lines(lines)
 
diff --git a/cross-project-tests/lit.cfg.py b/cross-project-tests/lit.cfg.py
index 774c4eaf4d976..c7d3217c99304 100644
--- a/cross-project-tests/lit.cfg.py
+++ b/cross-project-tests/lit.cfg.py
@@ -226,7 +226,7 @@ def can_target_host():
     xcode_lldb_vers = subprocess.check_output(["xcrun", "lldb", "--version"]).decode(
         "utf-8"
     )
-    match = re.search("lldb-(\d+)", xcode_lldb_vers)
+    match = re.search(r"lldb-(\d+)", xcode_lldb_vers)
     if match:
         apple_lldb_vers = int(match.group(1))
         if apple_lldb_vers < 1000:
@@ -250,7 +250,7 @@ def get_gdb_version_string():
     if len(gdb_vers_lines) < 1:
         print("Unkown GDB version format (too few lines)", file=sys.stderr)
         return None
-    match = re.search("GNU gdb \(.*?\) ((\d|\.)+)", gdb_vers_lines[0].strip())
+    match = re.search(r"GNU gdb \(.*?\) ((\d|\.)+)", gdb_vers_lines[0].strip())
     if match is None:
         print(f"Unkown GDB version format: {gdb_vers_lines[0]}", file=sys.stderr)
         return None
@@ -264,7 +264,7 @@ def get_clang_default_dwarf_version_string(triple):
     # Get the flags passed by the driver and look for -dwarf-version.
     cmd = f'{llvm_config.use_llvm_tool("clang")} -g -xc  -c - -v -### --target={triple}'
     stderr = subprocess.run(cmd.split(), stderr=subprocess.PIPE).stderr.decode()
-    match = re.search("-dwarf-version=(\d+)", stderr)
+    match = re.search(r"-dwarf-version=(\d+)", stderr)
     if match is None:
         print("Cannot determine default dwarf version", file=sys.stderr)
         return None