From bcba9ea5d205f7b9978276da3bef9f0e5ad78aaa Mon Sep 17 00:00:00 2001
From: Yi Kong <yikong@google.com>
Date: Tue, 28 Feb 2023 12:50:21 +0900
Subject: [PATCH] Revert "[Driver] Allow target override containing . in
 executable name"

This reverts commit 0d7eba1aeed853798bd8012f786c305e83a97b67.
diff --git a/clang/lib/Driver/ToolChain.cpp b/clang/lib/Driver/ToolChain.cpp
index 08b1fd01b3c0..6ffe6e6f4c88 100644
--- a/clang/lib/Driver/ToolChain.cpp
+++ b/clang/lib/Driver/ToolChain.cpp
@@ -352,7 +352,7 @@ static const DriverSuffix *FindDriverSuffix(StringRef ProgName, size_t &Pos) {
 /// Normalize the program name from argv[0] by stripping the file extension if
 /// present and lower-casing the string on Windows.
 static std::string normalizeProgramName(llvm::StringRef Argv0) {
-  std::string ProgName = std::string(llvm::sys::path::filename(Argv0));
+  std::string ProgName = std::string(llvm::sys::path::stem(Argv0));
   if (is_style_windows(llvm::sys::path::Style::native)) {
     // Transform to lowercase for case insensitive file systems.
     std::transform(ProgName.begin(), ProgName.end(), ProgName.begin(),
@@ -371,13 +371,6 @@ static const DriverSuffix *parseDriverSuffix(StringRef ProgName, size_t &Pos) {
   // added via -target as implicit first argument.
   const DriverSuffix *DS = FindDriverSuffix(ProgName, Pos);
 
-  if (!DS && ProgName.ends_with(".exe")) {
-    // Try again after stripping the executable suffix:
-    // clang++.exe -> clang++
-    ProgName = ProgName.drop_back(StringRef(".exe").size());
-    DS = FindDriverSuffix(ProgName, Pos);
-  }
-
   if (!DS) {
     // Try again after stripping any trailing version number:
     // clang++3.5 -> clang++
diff --git a/clang/test/Driver/target-override.c b/clang/test/Driver/target-override.c
index 2c605ac9a03d..aef89cc9a9dd 100644
--- a/clang/test/Driver/target-override.c
+++ b/clang/test/Driver/target-override.c
@@ -3,7 +3,6 @@
 
 // RUN: rm -rf %t && mkdir %t
 // RUN: ln -s %clang %t/i386-clang
-// RUN: ln -s %clang %t/x86_64-pc-freebsd13.1-clang
 
 // Check if invocation of "foo-clang" adds option "-target foo".
 //
@@ -14,7 +13,3 @@
 //
 // RUN: %t/i386-clang -c --target=x86_64 -### %s 2>&1 | FileCheck -check-prefix CHECK-TG2 %s
 // CHECK-TG2: Target: x86_64
-
-/// Check if invocation of "arch-vendor-osX.Y-clang" adds option "-target arch-vendor-osX.Y".
-// RUN: %t/x86_64-pc-freebsd13.1-clang -c -### %s 2>&1 | FileCheck -check-prefix CHECK-TG3 %s
-// CHECK-TG3: Target: x86_64-pc-freebsd13.1