[llvm] [RISCV] Change vector tuple type's TypeSize to scalable (PR #114329)

[Brandon Wu via llvm-commits]

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@@ -306,12 +306,14 @@ namespace llvm {
     /// be set and the runtime size will be a positive integer multiple of the
     /// base size.
     TypeSize getSizeInBits() const {
+      // clang-format off
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4vtomat wrote:

Good idea!

https://github.com/llvm/llvm-project/pull/114329