This is part of an LLC-beta test used to test <rdar://problem/6804645>. Please

bear with the awful code. It won't last in its current state beyond tonight.

llvm-svn: 98040

llvm/lib/Target/ARM/ARMISelLowering.cpp

@@ -37,14 +37,20 @@
 #include "llvm/CodeGen/MachineRegisterInfo.h"
 #include "llvm/CodeGen/PseudoSourceValue.h"
 #include "llvm/CodeGen/SelectionDAG.h"
+#include "llvm/MC/MCSectionMachO.h"
 #include "llvm/Target/TargetOptions.h"
 #include "llvm/ADT/VectorExtras.h"
 #include "llvm/Support/CommandLine.h"
+#include "llvm/Support/Dwarf.h"
 #include "llvm/Support/ErrorHandling.h"
 #include "llvm/Support/MathExtras.h"
 #include "llvm/Support/raw_ostream.h"
 #include <sstream>
 using namespace llvm;
+using namespace dwarf;
+
+static cl::opt<bool> EnableARMEHTest("enable-arm-eh-test", cl::Hidden,
+    cl::desc("Enable ARM EH Test"));
 
 static bool CC_ARM_APCS_Custom_f64(unsigned &ValNo, EVT &ValVT, EVT &LocVT,
                                    CCValAssign::LocInfo &LocInfo,
@@ -128,9 +134,33 @@ void ARMTargetLowering::addQRTypeForNEON(EVT VT) {
   addTypeForNEON(VT, MVT::v2f64, MVT::v4i32);
 }
 
+namespace llvm {
+
+  // FIXME: This is a test of <rdar://problem/6804645>.
+  class ARMMachOTargetObjectFile : public TargetLoweringObjectFileMachO {
+  public:
+    virtual void Initialize(MCContext &Ctx, const TargetMachine &TM) {
+      TargetLoweringObjectFileMachO::Initialize(Ctx, TM);
+
+      // Exception Handling.
+      LSDASection = getMachOSection("__TEXT", "__gcc_except_tab", 0,
+                                    SectionKind::getReadOnlyWithRel());
+    }
+
+    virtual unsigned getTTypeEncoding() const {
+      return DW_EH_PE_indirect | DW_EH_PE_pcrel | DW_EH_PE_sdata4;
+    }
+  };
+
+}
+
 static TargetLoweringObjectFile *createTLOF(TargetMachine &TM) {
   if (TM.getSubtarget<ARMSubtarget>().isTargetDarwin())
-    return new TargetLoweringObjectFileMachO();
+    if (EnableARMEHTest)
+      return new ARMMachOTargetObjectFile();
+    else
+      return new TargetLoweringObjectFileMachO();
+
   return new ARMElfTargetObjectFile();
 }