AMDGPU: Produce error on dynamic_stackalloc

llvm-svn: 246048

1 files changed, 13 insertions, 0 deletions

diff --git a/llvm/lib/Target/AMDGPU/AMDGPUISelLowering.cpp b/llvm/lib/Target/AMDGPU/AMDGPUISelLowering.cpp
index 9aada50bebe..212ae7ba74f 100644
--- a/llvm/lib/Target/AMDGPU/AMDGPUISelLowering.cpp
+++ b/llvm/lib/Target/AMDGPU/AMDGPUISelLowering.cpp
@@ -113,6 +113,9 @@ AMDGPUTargetLowering::AMDGPUTargetLowering(TargetMachine &TM,
   setOperationAction(ISD::BR_JT, MVT::Other, Expand);
   setOperationAction(ISD::BRIND, MVT::Other, Expand);
 
+  // This is totally unsupported, just custom lower to produce an error.
+  setOperationAction(ISD::DYNAMIC_STACKALLOC, MVT::i32, Custom);
+
   // We need to custom lower some of the intrinsics
   setOperationAction(ISD::INTRINSIC_WO_CHAIN, MVT::Other, Custom);
 
@@ -613,6 +616,15 @@ SDValue AMDGPUTargetLowering::LowerCall(CallLoweringInfo &CLI,
   return SDValue();
 }
 
+SDValue AMDGPUTargetLowering::LowerDYNAMIC_STACKALLOC(SDValue Op,
+                                                      SelectionDAG &DAG) const {
+  const Function &Fn = *DAG.getMachineFunction().getFunction();
+
+  DiagnosticInfoUnsupported NoDynamicAlloca(Fn, "dynamic alloca");
+  DAG.getContext()->diagnose(NoDynamicAlloca);
+  return SDValue();
+}
+
 SDValue AMDGPUTargetLowering::LowerOperation(SDValue Op,
                                              SelectionDAG &DAG) const {
   switch (Op.getOpcode()) {
@@ -639,6 +651,7 @@ SDValue AMDGPUTargetLowering::LowerOperation(SDValue Op,
   case ISD::UINT_TO_FP: return LowerUINT_TO_FP(Op, DAG);
   case ISD::FP_TO_SINT: return LowerFP_TO_SINT(Op, DAG);
   case ISD::FP_TO_UINT: return LowerFP_TO_UINT(Op, DAG);
+  case ISD::DYNAMIC_STACKALLOC: return LowerDYNAMIC_STACKALLOC(Op, DAG);
   }
   return Op;
 }