[riscv] Mark function as used to avoid unused warning.

diff --git a/llvm/lib/Target/RISCV/RISCVInsertVSETVLI.cpp b/llvm/lib/Target/RISCV/RISCVInsertVSETVLI.cpp
index fa43dae..f08dbee 100644 (file)
--- a/llvm/lib/Target/RISCV/RISCVInsertVSETVLI.cpp
+++ b/llvm/lib/Target/RISCV/RISCVInsertVSETVLI.cpp
@@ -420,6 +420,7 @@ public:
 };
 
 #if !defined(NDEBUG) || defined(LLVM_ENABLE_DUMP)
+LLVM_ATTRIBUTE_USED
 inline raw_ostream &operator<<(raw_ostream &OS, const VSETVLIInfo &V) {
   V.print(OS);
   return OS;