[llvm] [llvm][TypeSize] Consider TypeSize of '0' to be fixed/scalable-agnostic. (PR #72994)

[Sander de Smalen via llvm-commits]

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@@ -97,17 +97,29 @@ template <typename LeafTy, typename ValueTy> class FixedOrScalableQuantity {
 
   constexpr FixedOrScalableQuantity() = default;
   constexpr FixedOrScalableQuantity(ScalarTy Quantity, bool Scalable)
-      : Quantity(Quantity), Scalable(Scalable) {}
+      : Quantity(Quantity), Scalable(Quantity ? Scalable : false) {}
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sdesmalen-arm wrote:

Thanks, I've removed the canonicalisation now.

https://github.com/llvm/llvm-project/pull/72994