[llvm] [SDPatternMatch] Add m_CondCode, m_NoneOf, and some SExt improvements (PR #90762)

[Craig Topper via llvm-commits]

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@@ -758,6 +778,40 @@ inline auto m_False() {
       m_Value()};
 }
 
+struct CondCode_match {
+  std::optional<ISD::CondCode> CCToMatch;
+  ISD::CondCode *BindCC;
+
+  explicit CondCode_match(ISD::CondCode CC) : CCToMatch(CC), BindCC(nullptr) {}
+
+  explicit CondCode_match(ISD::CondCode *CC)
+      : CCToMatch(std::nullopt), BindCC(CC) {}
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topperc wrote:

The CCToMatch constructor as unneeded here.

https://github.com/llvm/llvm-project/pull/90762