Add -mtrap_function=<> option. rdar://9257465

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@129145 91177308-0d34-0410-b5e6-96231b3b80d8

2 files changed, 13 insertions, 0 deletions

diff --git a/include/clang/Driver/Options.td b/include/clang/Driver/Options.td
index e4f88bc619..9eac83536b 100644
--- a/include/clang/Driver/Options.td
+++ b/include/clang/Driver/Options.td
@@ -542,6 +542,8 @@ def mssse3 : Flag<"-mssse3">, Group<m_x86_Features_Group>;
 def maes : Flag<"-maes">, Group<m_x86_Features_Group>;
 def mavx : Flag<"-mavx">, Group<m_x86_Features_Group>;
 def mthumb : Flag<"-mthumb">, Group<m_Group>;
+def mtrap_function_EQ : Joined<"-mtrap-function=">, Group<m_Group>,
+  HelpText<"Issue call to specified function rather than a trap instruction">;
 def mtune_EQ : Joined<"-mtune=">, Group<m_Group>;
 def multi__module : Flag<"-multi_module">;
 def multiply__defined__unused : Separate<"-multiply_defined_unused">;
diff --git a/lib/Driver/Tools.cpp b/lib/Driver/Tools.cpp
index 9e0eab35f7..29f8f8356b 100644
--- a/lib/Driver/Tools.cpp
+++ b/lib/Driver/Tools.cpp
@@ -605,6 +605,17 @@ void Clang::AddARMTargetArgs(const ArgList &Args,
     CmdArgs.push_back("-neon");
   }
 
+  // Forward -mtrap_function= options to the backend.
+  for (arg_iterator it = Args.filtered_begin(options::OPT_mtrap_function_EQ),
+         ie = Args.filtered_end(); it != ie; ++it) {
+    const Arg *A = *it;
+    A->claim();
+    assert(A->getNumValues() == 1 && "-mtrap_function= expects one argument.");
+    llvm::StringRef FuncName = A->getValue(Args, 0);
+    CmdArgs.push_back("-backend-option");
+    CmdArgs.push_back(Args.MakeArgString("-arm-trap-func=" + FuncName));
+  }
+
   // Kernel code has more strict alignment requirements.
   if (KernelOrKext) {
     CmdArgs.push_back("-backend-option");