From 5c5bc7bc0a98e2ed3e9db318a2465dfd781a9435 Mon Sep 17 00:00:00 2001
From: Rui Ueyama <ruiu@google.com>
Date: Wed, 12 Apr 2017 18:29:52 +0000
Subject: [PATCH] Accept not only lld-link but also LLD-LINK, for example.

Filenames are case-insensitive on Windows, so when we dispatch based
on argv0, we need to handle it case-insensitively.

Fixes https://bugs.llvm.org/show_bug.cgi?id=32637.

llvm-svn: 300087
---
 lld/test/COFF/driver-windows.test | 3 +++
 lld/tools/lld/lld.cpp             | 6 +++---
 2 files changed, 6 insertions(+), 3 deletions(-)
 create mode 100644 lld/test/COFF/driver-windows.test

diff --git a/lld/test/COFF/driver-windows.test b/lld/test/COFF/driver-windows.test
new file mode 100644
index 000000000000..1b93a53bddb3
--- /dev/null
+++ b/lld/test/COFF/driver-windows.test
@@ -0,0 +1,3 @@
+# REQUIRES: system-windows
+# RUN: not LLD-LINK 2>&1 | FileCheck %s
+CHECK: no input files
diff --git a/lld/tools/lld/lld.cpp b/lld/tools/lld/lld.cpp
index b17e9af24d0a..09f8079010d4 100644
--- a/lld/tools/lld/lld.cpp
+++ b/lld/tools/lld/lld.cpp
@@ -43,9 +43,9 @@ LLVM_ATTRIBUTE_NORETURN static void die(const Twine &S) {
 
 static Flavor getFlavor(StringRef S) {
   return StringSwitch<Flavor>(S)
-      .Cases("ld", "ld.lld", "gnu", Gnu)
-      .Case("link", WinLink)
-      .Case("darwin", Darwin)
+      .CasesLower("ld", "ld.lld", "gnu", Gnu)
+      .CaseLower("link", WinLink)
+      .CaseLower("darwin", Darwin)
       .Default(Invalid);
 }