Emit an error message if the value passed to __builtin_returnaddress isn't a constant
__builtin_returnaddress requires that the value passed into is be a constant.
However, at -O0 even a constant expression may not be converted to a constant.
Emit an error message intead of crashing.
llvm-svn: 198531
diff --git a/llvm/lib/Target/Sparc/SparcISelLowering.cpp b/llvm/lib/Target/Sparc/SparcISelLowering.cpp
index c59d523..5442e57 100644
--- a/llvm/lib/Target/Sparc/SparcISelLowering.cpp
+++ b/llvm/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 @@
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);