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

[Dhruv Chawla via llvm-commits]

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@@ -3083,8 +3083,10 @@ bool CombinerHelper::matchHoistLogicOpWithSameOpcodeHands(
     return false;
   case TargetOpcode::G_ANYEXT:
   case TargetOpcode::G_SEXT:
-  case TargetOpcode::G_ZEXT: {
+  case TargetOpcode::G_ZEXT:
+  case TargetOpcode::G_TRUNC: {
     // Match: logic (ext X), (ext Y) --> ext (logic X, Y)
+    // Match: logic (trunc X), (trunc Y) -> trunc (logic X, Y)
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dc03-work wrote:

I will look into this.

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