From ac4c4a88441fdb8611834b0cfeb11979e7839d4d Mon Sep 17 00:00:00 2001
From: "Duncan P. N. Exon Smith" <dexonsmith@apple.com>
Date: Fri, 7 Mar 2014 16:16:52 +0000
Subject: [PATCH] ARM: Make .unreq directives case-insensitive

Be case-insensitive when processing .unreq directives.

Patch by Lin Zuojian!

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@203251 91177308-0d34-0410-b5e6-96231b3b80d8
---
 lib/Target/ARM/AsmParser/ARMAsmParser.cpp |  2 +-
 test/MC/ARM/dot-req-case-insensitive.s    | 20 ++++++++++++++++++++
 2 files changed, 21 insertions(+), 1 deletion(-)
 create mode 100644 test/MC/ARM/dot-req-case-insensitive.s

diff --git a/lib/Target/ARM/AsmParser/ARMAsmParser.cpp b/lib/Target/ARM/AsmParser/ARMAsmParser.cpp
index 7dc4d18a072..4b41a0dd0bb 100644
--- a/lib/Target/ARM/AsmParser/ARMAsmParser.cpp
+++ b/lib/Target/ARM/AsmParser/ARMAsmParser.cpp
@@ -8255,7 +8255,7 @@ bool ARMAsmParser::parseDirectiveUnreq(SMLoc L) {
     Error(L, "unexpected input in .unreq directive.");
     return false;
   }
-  RegisterReqs.erase(Parser.getTok().getIdentifier());
+  RegisterReqs.erase(Parser.getTok().getIdentifier().lower());
   Parser.Lex(); // Eat the identifier.
   return false;
 }
diff --git a/test/MC/ARM/dot-req-case-insensitive.s b/test/MC/ARM/dot-req-case-insensitive.s
new file mode 100644
index 00000000000..c1ca5667fcb
--- /dev/null
+++ b/test/MC/ARM/dot-req-case-insensitive.s
@@ -0,0 +1,20 @@
+@ RUN: llvm-mc -triple=arm < %s | FileCheck %s
+ .syntax unified
+_foo:
+
+ OBJECT .req r2
+ mov r4, OBJECT
+ mov r4, oBjEcT
+ .unreq oBJECT
+
+_foo2:
+ OBJECT .req r5
+ mov r4, OBJECT
+ .unreq OBJECT
+
+@ CHECK-LABEL: _foo:
+@ CHECK: mov r4, r2
+@ CHECK: mov r4, r2
+
+@ CHECK-LABEL: _foo2:
+@ CHECK: mov r4, r5