Emit an error message if the value passed to __builtin_returnaddress isn't a constant

[oota-llvm.git] / lib / Target / Sparc / SparcISelLowering.cpp

diff --git a/lib/Target/Sparc/SparcISelLowering.cpp b/lib/Target/Sparc/SparcISelLowering.cpp
index c59d523b6b174743ff6a79986bd5f6774ace6147..5442e5704c1fb0e769638e82de70365a7deebfe6 100644 (file)
--- a/lib/Target/Sparc/SparcISelLowering.cpp
+++ b/lib/Target/Sparc/SparcISelLowering.cpp
@@ -26,6 +26,7 @@
 #include "llvm/CodeGen/TargetLoweringObjectFileImpl.h"
 #include "llvm/IR/DerivedTypes.h"
 #include "llvm/IR/Function.h"
+#include "llvm/IR/LLVMContext.h"
 #include "llvm/IR/Module.h"
 #include "llvm/Support/ErrorHandling.h"
 using namespace llvm;
@@ -2470,6 +2471,12 @@ static SDValue LowerRETURNADDR(SDValue Op, SelectionDAG &DAG,
   MachineFrameInfo *MFI = MF.getFrameInfo();
   MFI->setReturnAddressIsTaken(true);
 
+  if (!isa<ConstantSDNode>(Op.getOperand(0))) {
+    DAG.getContext()->emitError("argument to '__builtin_return_address' must "
+                                "be a constant integer");
+    return SDValue();
+  }
+
   EVT VT = Op.getValueType();
   SDLoc dl(Op);
   uint64_t depth = Op.getConstantOperandVal(0);