[ELF] Simplify parseArmCMSEImportLib. NFC

Author: MaskRay

lld/ELF/Config.h

@@ -138,7 +138,7 @@ class LinkerDriver {
 
   std::unique_ptr<BitcodeCompiler> lto;
   std::vector<InputFile *> files;
-  std::optional<InputFile *> armCmseImpLib;
+  InputFile *armCmseImpLib = nullptr;
 
 public:
   SmallVector<std::pair<StringRef, unsigned>, 0> archiveFiles;

lld/ELF/InputFiles.cpp

@@ -330,11 +330,11 @@ extern template void ObjFile<ELF32BE>::importCmseSymbols();
 extern template void ObjFile<ELF64LE>::importCmseSymbols();
 extern template void ObjFile<ELF64BE>::importCmseSymbols();
 
-template <class ELFT> static void doParseArmCMSEImportLib(InputFile *file) {
-  cast<ObjFile<ELFT>>(file)->importCmseSymbols();
+template <class ELFT> static void doParseArmCMSEImportLib(InputFile &file) {
+  cast<ObjFile<ELFT>>(file).importCmseSymbols();
 }
 
-void elf::parseArmCMSEImportLib(InputFile *file) {
+void elf::parseArmCMSEImportLib(InputFile &file) {
   invokeELFT(doParseArmCMSEImportLib, file);
 }
 

lld/ELF/InputFiles.h

@@ -49,7 +49,7 @@ std::optional<MemoryBufferRef> readFile(StringRef path);
 template <class ELFT> void doParseFile(InputFile *file);
 void parseFile(InputFile *file);
 
-void parseArmCMSEImportLib(InputFile *file);
+void parseArmCMSEImportLib(InputFile &file);
 
 // The root class of input files.
 class InputFile {