[llvm] [TableGen] Strip directories from generated include (PR #168409)

[Keith Smiley via llvm-commits]

https://github.com/keith updated https://github.com/llvm/llvm-project/pull/168409

>From e55bf7ccbf75ea2c9e9e30217fd0ecfffc99afd3 Mon Sep 17 00:00:00 2001
From: Keith Smiley <keithbsmiley at gmail.com>
Date: Mon, 17 Nov 2025 17:35:00 +0000
Subject: [PATCH] [TableGen] Strip directories from generated include

Fixes https://github.com/llvm/llvm-project/pull/167700 to not rely on
the full output path of the file to be part of the include path later.
---
 llvm/utils/TableGen/RegisterInfoEmitter.cpp | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/llvm/utils/TableGen/RegisterInfoEmitter.cpp b/llvm/utils/TableGen/RegisterInfoEmitter.cpp
index ef7b13e8940f8..54ed69431b283 100644
--- a/llvm/utils/TableGen/RegisterInfoEmitter.cpp
+++ b/llvm/utils/TableGen/RegisterInfoEmitter.cpp
@@ -29,6 +29,7 @@
 #include "llvm/Support/Casting.h"
 #include "llvm/Support/CommandLine.h"
 #include "llvm/Support/Format.h"
+#include "llvm/Support/Path.h"
 #include "llvm/Support/raw_ostream.h"
 #include "llvm/TableGen/Error.h"
 #include "llvm/TableGen/Record.h"
@@ -104,7 +105,8 @@ static void emitInclude(StringRef FilenamePrefix, StringRef IncludeFile,
                         StringRef GuardMacro, raw_ostream &OS) {
   OS << "#ifdef " << GuardMacro << '\n';
   OS << "#undef " << GuardMacro << '\n';
-  OS << "#include \"" << FilenamePrefix << IncludeFile << "\"\n";
+  OS << "#include \"" << sys::path::stem(FilenamePrefix) << IncludeFile
+     << "\"\n";
   OS << "#endif\n\n";
 }