[llvm] Nvptx port LowerBITCAST to SelectionDAG (PR #120903)

[via llvm-commits]

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@@ -2174,8 +2174,12 @@ SDValue DAGTypeLegalizer::PromoteIntOp_ATOMIC_STORE(AtomicSDNode *N) {
 }
 
 SDValue DAGTypeLegalizer::PromoteIntOp_BITCAST(SDNode *N) {
-  // This should only occur in unusual situations like bitcasting to an
-  // x86_fp80, so just turn it into a store+load
+  // Use the custom lowering.
+  if (const auto Res = LowerBitcast(N)) {
+    return Res;
+  }
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GrumpyPigSkin wrote:

I have removed the braces 

https://github.com/llvm/llvm-project/pull/120903