[llvm] [Tablegen] Support Operand in morphing patterns (PR #99645)

[Matt Arsenault via llvm-commits]

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@@ -294,6 +294,12 @@ void MatcherGen::EmitLeafMatchCode(const TreePatternNode &N) {
     return;
   }
 
+  if (LeafRec->isSubClassOf("Operand")) {
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arsenm wrote:

Things that are timm should just be a consistent, fixed size since it doesn't matter. You can just pick i32 or whatever 

https://github.com/llvm/llvm-project/pull/99645