[llvm] [IA]: Construct (de)interleave4 out of (de)interleave2 (PR #89276)

[Craig Topper via llvm-commits]

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@@ -2793,6 +2793,65 @@ inline VScaleVal_match m_VScale() {
   return VScaleVal_match();
 }
 
+template <typename LHS, typename RHS> struct Interleave2_match {
+  LHS L;
+  RHS R;
+
+  Interleave2_match(const LHS &L, const RHS &R) : L(L), R(R) {}
+
+  template <typename ITy> bool match(ITy *V) {
+    auto *I = dyn_cast<IntrinsicInst>(V);
+    if (m_Intrinsic<Intrinsic::experimental_vector_interleave2>().match(V)) {
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topperc wrote:

drop curly braces around single line body

https://github.com/llvm/llvm-project/pull/89276