[llvm] [clang] Fix python escapes (PR #71170)

[Nathan Sidwell via cfe-commits]

https://github.com/urnathan created https://github.com/llvm/llvm-project/pull/71170

With Fedora 39, I encountered 2 new python warnings:

/home/nathan/gh/llvm/push/strict-aliasing/clang/lib/Tooling/DumpTool/generate_cxx_src_locs.py:28: SyntaxWarning: invalid escape sequence '\*'
  self.implementationContent += """

/home/nathan/gh/llvm/push/strict-aliasing/llvm/test/lit.cfg.py:274: SyntaxWarning: invalid escape sequence '\d'
  match = re.search("release (\d+)\.(\d+)", ptxas_out)

Use raw strings here. I guess python got pickier or something?

While there, might as well fix the blank line caused by """NEWLINE ...
""" by dropping its first char.

>From 9b5cb1ac8d4b9a2aaa4c06e41620e38b6c3cae8c Mon Sep 17 00:00:00 2001
From: Nathan Sidwell <nathan at acm.org>
Date: Thu, 2 Nov 2023 18:14:05 -0400
Subject: [PATCH] Fix python escapes

With Fedora 39, I encountered 2 new python warnings:

/home/nathan/gh/llvm/push/strict-aliasing/clang/lib/Tooling/DumpTool/generate_cxx_src_locs.py:28: SyntaxWarning: invalid escape sequence '\*'
  self.implementationContent += """

/home/nathan/gh/llvm/push/strict-aliasing/llvm/test/lit.cfg.py:274: SyntaxWarning: invalid escape sequence '\d'
  match = re.search("release (\d+)\.(\d+)", ptxas_out)

Use raw strings here. I guess python got pickier or something?

May as well fix the blank line caused by """NEWLINE
...
"""
---
 clang/lib/Tooling/DumpTool/generate_cxx_src_locs.py | 4 ++--
 llvm/test/lit.cfg.py                                | 2 +-
 2 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/clang/lib/Tooling/DumpTool/generate_cxx_src_locs.py b/clang/lib/Tooling/DumpTool/generate_cxx_src_locs.py
index dafb332961ede86..54cfd0741f9d122 100755
--- a/clang/lib/Tooling/DumpTool/generate_cxx_src_locs.py
+++ b/clang/lib/Tooling/DumpTool/generate_cxx_src_locs.py
@@ -25,7 +25,7 @@ def __init__(self, templateClasses):
 
     def GeneratePrologue(self):
 
-        self.implementationContent += """
+        self.implementationContent += R"""
 /*===- Generated file -------------------------------------------*- C++ -*-===*\
 |*                                                                            *|
 |* Introspection of available AST node SourceLocations                        *|
@@ -58,7 +58,7 @@ def GeneratePrologue(self):
 private:
 std::vector<clang::TypeLoc> &TLRG;
 };
-"""
+"""[1:]
 
     def GenerateBaseGetLocationsDeclaration(self, CladeName):
         InstanceDecoration = "*"
diff --git a/llvm/test/lit.cfg.py b/llvm/test/lit.cfg.py
index ab245b71cdd16a5..cf050bbfe3b1413 100644
--- a/llvm/test/lit.cfg.py
+++ b/llvm/test/lit.cfg.py
@@ -271,7 +271,7 @@ def ptxas_version(ptxas):
     ptxas_cmd = subprocess.Popen([ptxas, "--version"], stdout=subprocess.PIPE)
     ptxas_out = ptxas_cmd.stdout.read().decode("ascii")
     ptxas_cmd.wait()
-    match = re.search("release (\d+)\.(\d+)", ptxas_out)
+    match = re.search(R"release (\d+)\.(\d+)", ptxas_out)
     if match:
         return (int(match.group(1)), int(match.group(2)))
     print("couldn't determine ptxas version")