diff --git a/clang/lib/Driver/ToolChains/Clang.cpp b/clang/lib/Driver/ToolChains/Clang.cpp
--- a/clang/lib/Driver/ToolChains/Clang.cpp
+++ b/clang/lib/Driver/ToolChains/Clang.cpp
@@ -1522,6 +1522,15 @@
   }
 }
 
+void AddAAPCSVolatileBitfieldArgs(const ArgList &Args, ArgStringList &CmdArgs) {
+  if (!Args.hasFlag(options::OPT_faapcs_bitfield_width,
+                    options::OPT_fno_aapcs_bitfield_width, true))
+    CmdArgs.push_back("-fno-aapcs-bitfield-width");
+
+  if (Args.getLastArg(options::OPT_ForceAAPCSBitfieldLoad))
+    CmdArgs.push_back("-faapcs-bitfield-load");
+}
+
 namespace {
 void RenderARMABI(const llvm::Triple &Triple, const ArgList &Args,
                   ArgStringList &CmdArgs) {
@@ -1580,6 +1589,8 @@
 
   if (Args.getLastArg(options::OPT_mcmse))
     CmdArgs.push_back("-mcmse");
+
+  AddAAPCSVolatileBitfieldArgs(Args, CmdArgs);
 }
 
 void Clang::RenderTargetOptions(const llvm::Triple &EffectiveTriple,
@@ -1768,6 +1779,8 @@
       D.Diag(diag::err_drv_unsupported_option_argument)
           << A->getOption().getName() << Val;
   }
+
+  AddAAPCSVolatileBitfieldArgs(Args, CmdArgs);
 }
 
 void Clang::AddMIPSTargetArgs(const ArgList &Args,