[llvm] [GISel][CombinerHelper] Combine op(trunc(x), trunc(y)) -> trunc(op(x, y)) (PR #89023)

[Dhruv Chawla via llvm-commits]

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@@ -3157,6 +3157,20 @@ bool CombinerHelper::matchHoistLogicOpWithSameOpcodeHands(
     // Match: logic (ext X), (ext Y) --> ext (logic X, Y)
     break;
   }
+  case TargetOpcode::G_TRUNC: {
+    // Match: logic (trunc X), (trunc Y) -> trunc (logic X, Y)
+    MachineFunction *MF = MI.getMF();
+    EVT DstEVT = getApproximateEVTForLLT(MRI.getType(Dst), MF->getDataLayout(),
+                                         MF->getFunction().getContext());
+    EVT XEVT = getApproximateEVTForLLT(XTy, MF->getDataLayout(),
+                                       MF->getFunction().getContext());
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dc03-work wrote:

Okay, done.

https://github.com/llvm/llvm-project/pull/89023