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.
llvm-svn: 209086
diff --git a/clang/lib/Driver/Tools.cpp b/clang/lib/Driver/Tools.cpp
index b0425cb..7862ffb4 100644
--- a/clang/lib/Driver/Tools.cpp
+++ b/clang/lib/Driver/Tools.cpp
@@ -3451,6 +3451,11 @@
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