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

[Brandon Wu via cfe-commits]

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@@ -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; }
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4vtomat wrote:

String literal is placed in data segment so its lifetime is the lifetime of the 
program. StringRef doesn't take the ownership, but string literal is alive 
until the whole program ends, so I guess it's ok for referencing it?

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