[llvm] [GISel] Add KnownFPClass Analysis to GISelValueTrackingPass (PR #134611)

[Matt Arsenault via llvm-commits]

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@@ -671,6 +674,23 @@ class GFConstant {
   /// Returns the kind of of this constant, e.g, Scalar.
   GFConstantKind getKind() const { return Kind; }
 
+  const_iterator begin() const {
+    assert(Kind != GFConstantKind::ScalableVector &&
+           "Expected fixed vector or scalar constant");
+    return Values.begin();
+  }
+
+  const_iterator end() const {
+    assert(Kind != GFConstantKind::ScalableVector &&
+           "Expected fixed vector or scalar constant");
+    return Values.end();
+  }
+
+  size_t size() const {
+    assert(Kind == GFConstantKind::FixedVector && "Expected fixed vector");
+    return Values.size();
+  }
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arsenm wrote:

Seems unrelated? 

https://github.com/llvm/llvm-project/pull/134611