[llvm-commits] [llvm] r140160 - in /llvm/trunk: include/llvm/MC/MCInstrDesc.h lib/CodeGen/SelectionDAG/InstrEmitter.cpp lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp lib/Target/ARM/ARMInstrInfo.td lib/Target/ARM/ARMInstrThumb2.td utils/TableGen/CodeGenInstruction.cpp utils/TableGen/CodeGenInstruction.h utils/TableGen/InstrInfoEmitter.cpp

[Jakob Stoklund Olesen]

On Sep 20, 2011, at 11:22 AM, Andrew Trick wrote:

> --- llvm/trunk/lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp (original)
> +++ llvm/trunk/lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp Tue Sep 20 13:22:31 2011
> @@ -179,7 +179,12 @@
> 
> void TargetLowering::AdjustInstrPostInstrSelection(MachineInstr *MI,
>                                                    SDNode *Node) const {
> -  // Do nothing unless the target overrides it.
> +#ifndef NDEBUG
> +  dbgs() << "If a target marks an instruction with "
> +          "'hasPostISelHook', it must implement "
> +          "TargetLowering::AdjustInstrPostInstrSelection!";
> +#endif
> +  llvm_unreachable(0);
> }
> 

llvm_unreachable takes a (const char *msg) argument that is optimized away in NDEBUG builds.

/jakob