[llvm] [AMDGPU] Reject i64 amdgcn.ubfe/sbfe with a diagnostic (PR #217461)

[Matt Arsenault via llvm-commits]

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@@ -8066,48 +8066,17 @@ static SDValue lowerBFEIntrinsic(SDValue Op, SelectionDAG &DAG, bool Signed) {
   SDValue Offset = Op.getOperand(2);
   SDValue Width = Op.getOperand(3);
 
-  if (VT == MVT::i32)
-    return DAG.getNode(Signed ? AMDGPUISD::BFE_I32 : AMDGPUISD::BFE_U32, DL, VT,
-                       Src, Offset, Width);
-
-  assert(!VT.isVector() && "Vector handling of BFE not implemented");
-
-  auto *CWidth = dyn_cast<ConstantSDNode>(Width);
-  if (CWidth && CWidth->getZExtValue() == 0)
-    return DAG.getConstant(0, DL, VT);
+  if (VT != MVT::i32) {
+    DAG.getContext()->diagnose(DiagnosticInfoUnsupported(
+        DAG.getMachineFunction().getFunction(),
+        Twine("llvm.amdgcn.") + (Signed ? "sbfe" : "ubfe") +
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arsenm wrote:

Intrinsic::getBaseName(ID)?

https://github.com/llvm/llvm-project/pull/217461