[ARM] Pass subtarget feature "+no-movt" instead of passing backend option
"-arm-use-movt=0".
This change is needed since backend options do not make it to the backend
when doing LTO and are not capable of changing the behavior of code-gen
passes on a per-function basis.
rdar://problem/21529937
Differential Revision: http://reviews.llvm.org/D11025
llvm-svn: 242368
diff --git a/clang/lib/Driver/Tools.cpp b/clang/lib/Driver/Tools.cpp
index 8c11992..89e3987 100644
--- a/clang/lib/Driver/Tools.cpp
+++ b/clang/lib/Driver/Tools.cpp
@@ -718,6 +718,10 @@
} else if (KernelOrKext && (!Triple.isiOS() || Triple.isOSVersionLT(6))) {
Features.push_back("+long-calls");
}
+
+ // The kext linker doesn't know how to deal with movw/movt.
+ if (KernelOrKext)
+ Features.push_back("+no-movt");
}
void Clang::AddARMTargetArgs(const ArgList &Args, ArgStringList &CmdArgs,
@@ -793,10 +797,6 @@
if (KernelOrKext) {
CmdArgs.push_back("-backend-option");
CmdArgs.push_back("-arm-strict-align");
-
- // The kext linker doesn't know how to deal with movw/movt.
- CmdArgs.push_back("-backend-option");
- CmdArgs.push_back("-arm-use-movt=0");
}
// -mkernel implies -mstrict-align; don't add the redundant option.