[clang] [RISCV][clang] Optimize memory usage of intrinsic lookup table (PR #77487)

[Brandon Wu via cfe-commits]

================
@@ -416,8 +416,10 @@ class RVVIntrinsic {
   RVVTypePtr getOutputType() const { return OutputType; }
   const RVVTypes &getInputTypes() const { return InputTypes; }
   llvm::StringRef getBuiltinName() const { return BuiltinName; }
-  llvm::StringRef getName() const { return Name; }
-  llvm::StringRef getOverloadedName() const { return OverloadedName; }
+  llvm::StringRef getName() const { return "__riscv_" + Name; }
----------------
4vtomat wrote:

I mean, return the temporary string's raw data pointer(const char*).

https://github.com/llvm/llvm-project/pull/77487