[clang] [llvm] [HLSL] Implement `WaveReadLaneAt` intrinsic (PR #111010)

[Farzon Lotfi via cfe-commits]

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@@ -428,6 +431,7 @@ bool SPIRVInstructionSelector::spvSelect(Register ResVReg,
 
   case TargetOpcode::G_INTRINSIC:
   case TargetOpcode::G_INTRINSIC_W_SIDE_EFFECTS:
+  case TargetOpcode::G_INTRINSIC_CONVERGENT:
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farzonl wrote:

Is there anything that distinguishes a `G_INTRINSIC_CONVERGENT` vs a `G_INTRINSIC`?  Seems like we are handling them the same way so wondering what happens with that extra information about convergence?


https://github.com/llvm/llvm-project/pull/111010