[llvm] Add m_SelectCCLike matcher to match SELECT_CC or SELECT with SETCC (PR #149646)

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<!--LLVM CODE FORMAT COMMENT: {clang-format}-->


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<summary>
You can test this locally with the following command:
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``````````bash
git-clang-format --diff HEAD~1 HEAD --extensions h,cpp -- llvm/include/llvm/CodeGen/SDPatternMatch.h llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp
``````````

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<details>
<summary>
View the diff from clang-format here.
</summary>

``````````diff
diff --git a/llvm/include/llvm/CodeGen/SDPatternMatch.h b/llvm/include/llvm/CodeGen/SDPatternMatch.h
index aeafb4f6d..6d77c0576 100644
--- a/llvm/include/llvm/CodeGen/SDPatternMatch.h
+++ b/llvm/include/llvm/CodeGen/SDPatternMatch.h
@@ -93,7 +93,8 @@ struct Value_match {
 
   explicit Value_match(SDValue Match) : MatchVal(Match) {}
 
-  template <typename MatchContext> bool match(const MatchContext &, SDValue N) const {
+  template <typename MatchContext>
+  bool match(const MatchContext &, SDValue N) const {
     if (MatchVal)
       return MatchVal == N;
     return N.getNode();
@@ -130,7 +131,8 @@ struct DeferredValue_match {
 
   explicit DeferredValue_match(SDValue &Match) : MatchVal(Match) {}
 
-  template <typename MatchContext> bool match(const MatchContext &, SDValue N) const {
+  template <typename MatchContext>
+  bool match(const MatchContext &, SDValue N) const {
     return N == MatchVal;
   }
 };
@@ -196,7 +198,8 @@ struct Value_bind {
 
   explicit Value_bind(SDValue &N) : BindVal(N) {}
 
-  template <typename MatchContext> bool match(const MatchContext &, SDValue N) const {
+  template <typename MatchContext>
+  bool match(const MatchContext &, SDValue N) const {
     BindVal = N;
     return true;
   }
@@ -1203,7 +1206,8 @@ struct CondCode_match {
 
   explicit CondCode_match(ISD::CondCode *CC) : BindCC(CC) {}
 
-  template <typename MatchContext> bool match(const MatchContext &, SDValue N) const {
+  template <typename MatchContext>
+  bool match(const MatchContext &, SDValue N) const {
     if (auto *CC = dyn_cast<CondCodeSDNode>(N.getNode())) {
       if (CCToMatch && *CCToMatch != CC->get())
         return false;
diff --git a/llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp b/llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp
index 5acc3a23a..f7f0fb01f 100644
--- a/llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp
+++ b/llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp
@@ -265,46 +265,47 @@ namespace {
           MaximumLegalStoreInBits = VT.getSizeInBits().getKnownMinValue();
     }
 
-   template <typename LTy, typename RTy, typename TTy, typename FTy,
-             typename CCTy>
-   struct SelectCC_match {
-     LTy L;
-     RTy R;
-     TTy T;
-     FTy F;
-     CCTy CC;
- 
-     SelectCC_match(LTy L, RTy R, TTy T, FTy F, CCTy CC)
-         : L(std::move(L)), R(std::move(R)), T(std::move(T)), F(std::move(F)),
-           CC(std::move(CC)) {}
-
-     template <typename MatchContext>
-     bool match(const MatchContext &Ctx, SDValue V) const {
-       return V.getOpcode() == ISD::SELECT_CC && L.match(Ctx, V.getOperand(0)) &&
-              R.match(Ctx, V.getOperand(1)) && T.match(Ctx, V.getOperand(2)) &&
-              F.match(Ctx, V.getOperand(3)) && CC.match(Ctx, V.getOperand(4));
-     }
-   };
-
-   template <typename LTy, typename RTy, typename TTy, typename FTy,
-             typename CCTy>
-   inline auto m_SelectCC(LTy &&L, RTy &&R, TTy &&T, FTy &&F, CCTy &&CC) {
-     return SelectCC_match<std::decay_t<LTy>, std::decay_t<RTy>,
-                           std::decay_t<TTy>, std::decay_t<FTy>,
-                           std::decay_t<CCTy>>(
-         std::forward<LTy>(L), std::forward<RTy>(R), std::forward<TTy>(T),
-         std::forward<FTy>(F), std::forward<CCTy>(CC));
-   }
-
-   template <typename LTy, typename RTy, typename TTy, typename FTy,
-             typename CCTy>
-   inline auto m_SelectCCLike(LTy &&L, RTy &&R, TTy &&T, FTy &&F, CCTy &&CC) {
-     return SDPatternMatch::m_AnyOf(
-         SDPatternMatch::m_Select(SDPatternMatch::m_SetCC(L, R, CC), T, F),
-         m_SelectCC(std::forward<LTy>(L), std::forward<RTy>(R),
-                    std::forward<TTy>(T), std::forward<FTy>(F),
-                    std::forward<CCTy>(CC)));
-   }
+    template <typename LTy, typename RTy, typename TTy, typename FTy,
+              typename CCTy>
+    struct SelectCC_match {
+      LTy L;
+      RTy R;
+      TTy T;
+      FTy F;
+      CCTy CC;
+
+      SelectCC_match(LTy L, RTy R, TTy T, FTy F, CCTy CC)
+          : L(std::move(L)), R(std::move(R)), T(std::move(T)), F(std::move(F)),
+            CC(std::move(CC)) {}
+
+      template <typename MatchContext>
+      bool match(const MatchContext &Ctx, SDValue V) const {
+        return V.getOpcode() == ISD::SELECT_CC &&
+               L.match(Ctx, V.getOperand(0)) && R.match(Ctx, V.getOperand(1)) &&
+               T.match(Ctx, V.getOperand(2)) && F.match(Ctx, V.getOperand(3)) &&
+               CC.match(Ctx, V.getOperand(4));
+      }
+    };
+
+    template <typename LTy, typename RTy, typename TTy, typename FTy,
+              typename CCTy>
+    inline auto m_SelectCC(LTy &&L, RTy &&R, TTy &&T, FTy &&F, CCTy &&CC) {
+      return SelectCC_match<std::decay_t<LTy>, std::decay_t<RTy>,
+                            std::decay_t<TTy>, std::decay_t<FTy>,
+                            std::decay_t<CCTy>>(
+          std::forward<LTy>(L), std::forward<RTy>(R), std::forward<TTy>(T),
+          std::forward<FTy>(F), std::forward<CCTy>(CC));
+    }
+
+    template <typename LTy, typename RTy, typename TTy, typename FTy,
+              typename CCTy>
+    inline auto m_SelectCCLike(LTy &&L, RTy &&R, TTy &&T, FTy &&F, CCTy &&CC) {
+      return SDPatternMatch::m_AnyOf(
+          SDPatternMatch::m_Select(SDPatternMatch::m_SetCC(L, R, CC), T, F),
+          m_SelectCC(std::forward<LTy>(L), std::forward<RTy>(R),
+                     std::forward<TTy>(T), std::forward<FTy>(F),
+                     std::forward<CCTy>(CC)));
+    }
 
     void ConsiderForPruning(SDNode *N) {
       // Mark this for potential pruning.
@@ -4143,8 +4144,9 @@ SDValue DAGCombiner::visitSUB(SDNode *N) {
     if (sd_match(N1, m_SelectCCLike(m_Specific(N0), m_Value(Y), m_Zero(),
                                     m_Deferred(Y),
                                     m_SpecificCondCode(ISD::SETULT))) ||
-        sd_match(N1, m_SelectCCLike(m_Specific(N0), m_Value(Y), m_Deferred(Y),
-                                    m_Zero(), m_SpecificCondCode(ISD::SETUGE)))||
+        sd_match(N1,
+                 m_SelectCCLike(m_Specific(N0), m_Value(Y), m_Deferred(Y),
+                                m_Zero(), m_SpecificCondCode(ISD::SETUGE))) ||
         sd_match(N1, m_VSelect(m_SetCC(m_Specific(N0), m_Value(Y),
                                        m_SpecificCondCode(ISD::SETULT)),
                                m_Zero(), m_Deferred(Y))) ||

``````````

</details>


https://github.com/llvm/llvm-project/pull/149646