[llvm] [LFI] Report reserved register modification in error message (PR #195160)

[Nick Desaulniers via llvm-commits]

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@@ -40,7 +41,8 @@ class MCLFIRewriter {
                 std::unique_ptr<MCInstrInfo> &&II)
       : Ctx(Ctx), InstInfo(std::move(II)), RegInfo(std::move(RI)) {}
 
-  LLVM_ABI void error(const MCInst &Inst, const char Msg[]);
+  LLVM_ABI void error(const MCInst &Inst, const Twine &Msg);
+  LLVM_ABI void warning(const MCInst &Inst, const Twine &Msg);
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nickdesaulniers wrote:

`MCLFIRewriter::warning` seems unused?

https://github.com/llvm/llvm-project/pull/195160