[llvm] [CodeGen] [AMDGPU] Support type-aware intrinsic feature checks (PR #205536)

[Matt Arsenault via llvm-commits]

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@@ -5530,10 +5530,14 @@ void SelectionDAGBuilder::visitTargetIntrinsic(const CallInst &I,
   Intrinsic::ID IntrinsicID = static_cast<Intrinsic::ID>(Intrinsic);
 
   if (!DAG.getMachineFunction().getSubtarget().isIntrinsicSupported(
-          Intrinsic)) {
+          Intrinsic, I.getFunctionType())) {
     SDLoc DL = getCurSDLoc();
+    StringRef RequiredFeatures = DAG.getMachineFunction()
+                                     .getSubtarget()
+                                     .getRequiredTargetFeaturesForIntrinsic(
+                                         Intrinsic, I.getFunctionType());
     DAG.getContext()->diagnose(DiagnosticInfoUnsupportedTargetIntrinsic(
-        *I.getFunction(), IntrinsicID, DL.getDebugLoc()));
+        *I.getFunction(), IntrinsicID, DL.getDebugLoc(), RequiredFeatures));
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arsenm wrote:

Ideally the diagnostic would express that the specific type requires the feature

https://github.com/llvm/llvm-project/pull/205536