[llvm] [RISCV][InsertVSETVLI] Remove redundant vsetvli by repeating the coalesce phase (PR #141298)

[Min-Yih Hsu via llvm-commits]

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@@ -26,6 +26,7 @@
 
 #include "RISCV.h"
 #include "RISCVSubtarget.h"
+#include "llvm/ADT/SetVector.h"
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mshockwave wrote:

I'd just changed the method and we're no longer using SetVector.

https://github.com/llvm/llvm-project/pull/141298