From: Saleem Abdulrasool <compnerd@compnerd.org>
Date: Sun, 18 May 2014 06:42:02 +0000 (+0000)
Subject: Driver: force restricted IT blocks for Windows on ARM
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=d1376d137030d8b6aa628cedab8fd7e1e400ab5e;p=clang

Driver: force restricted IT blocks for Windows on ARM

Windows on ARM expects ARMv8 (restricted IT) conditional instructions only.
Force enable the restricted IT mode via the backend option when targeting WoA.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@209086 91177308-0d34-0410-b5e6-96231b3b80d8
---

diff --git a/lib/Driver/Tools.cpp b/lib/Driver/Tools.cpp
index b0425cbe08..7862ffb446 100644
--- a/lib/Driver/Tools.cpp
+++ b/lib/Driver/Tools.cpp
@@ -3451,6 +3451,11 @@ void Clang::ConstructJob(Compilation &C, const JobAction &JA,
       CmdArgs.push_back("-backend-option");
       CmdArgs.push_back("-arm-no-restrict-it");
     }
+  } else if (TT.isOSWindows() && (TT.getArch() == llvm::Triple::arm ||
+                                  TT.getArch() == llvm::Triple::thumb)) {
+    // Windows on ARM expects restricted IT blocks
+    CmdArgs.push_back("-backend-option");
+    CmdArgs.push_back("-arm-restrict-it");
   }
 
   // Forward -f options with positive and negative forms; we translate
diff --git a/test/Driver/woa-restrict-it.c b/test/Driver/woa-restrict-it.c
new file mode 100644
index 0000000000..c046991ae1
--- /dev/null
+++ b/test/Driver/woa-restrict-it.c
@@ -0,0 +1,4 @@
+// RUN: %clang -target armv7-windows -### %s 2>&1 | FileCheck %s
+
+// CHECK: "-backend-option" "-arm-restrict-it"
+