[llvm] [SDAG] Drop select -> fmax/min folding in SelectionDAGBuilder (PR #93575)

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git-clang-format --diff origin/main HEAD --extensions cpp -- llvm/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp --diff_from_common_commit
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``````````diff
diff --git a/llvm/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp b/llvm/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp
index 93c46b822..aebc2b8db 100644
--- a/llvm/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp
+++ b/llvm/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp
@@ -3863,7 +3863,9 @@ void SelectionDAGBuilder::visitSelect(const User &I) {
     case SPF_UMAX:    Opc = ISD::UMAX; break;
     case SPF_UMIN:    Opc = ISD::UMIN; break;
     case SPF_SMAX:    Opc = ISD::SMAX; break;
-    case SPF_SMIN:    Opc = ISD::SMIN; break;
+    case SPF_SMIN:
+      Opc = ISD::SMIN;
+      break;
     case SPF_NABS:
       Negate = true;
       [[fallthrough]];

``````````

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https://github.com/llvm/llvm-project/pull/93575