[llvm] [AMDGPU] Break v2i32 and/or/xor ops into i32 pairs when followed by t… (PR #191422)

[Matt Arsenault via llvm-commits]

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@@ -13956,6 +13956,58 @@ static uint32_t getPermuteMask(SDValue V) {
   return ~0;
 }
 
+static SDValue performAndOrXorv2i32Combine(SDNode *N, SelectionDAG &DAG) {
+  EVT VT = N->getValueType(0);
+  const unsigned Opc = N->getOpcode();
+  assert(VT == MVT::v2i32);
+  if (!N->isDivergent())
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arsenm wrote:

Divergence isn't really what this cares about, divergence is just a poor proxy for VALU 

https://github.com/llvm/llvm-project/pull/191422