Simplify InputFile::fetch().

We don't have to return a value from the function. Instead, we can
directly call parseFile from the functions.

llvm-svn: 361478

Author: rui314

lld/ELF/InputFiles.cpp

@@ -1010,14 +1010,14 @@ void ArchiveFile::parse() {
 }
 
 // Returns a buffer pointing to a member file containing a given symbol.
-InputFile *ArchiveFile::fetch(const Archive::Symbol &Sym) {
+void ArchiveFile::fetch(const Archive::Symbol &Sym) {
   Archive::Child C =
       CHECK(Sym.getMember(), toString(this) +
                                  ": could not get the member for symbol " +
                                  Sym.getName());
 
   if (!Seen.insert(C.getChildOffset()).second)
-    return nullptr;
+    return;
 
   MemoryBufferRef MB =
       CHECK(C.getMemoryBufferRef(),
@@ -1031,7 +1031,7 @@ InputFile *ArchiveFile::fetch(const Archive::Symbol &Sym) {
   InputFile *File = createObjectFile(
       MB, getName(), C.getParent()->isThin() ? 0 : C.getChildOffset());
   File->GroupId = GroupId;
-  return File;
+  parseFile(File);
 }
 
 unsigned SharedFile::VernauxNum;
@@ -1469,9 +1469,9 @@ InputFile *elf::createSharedFile(MemoryBufferRef MB, StringRef DefaultSoName) {
   return F;
 }
 
-InputFile *LazyObjFile::fetch() {
+void LazyObjFile::fetch() {
   if (MB.getBuffer().empty())
-    return nullptr;
+    return;
 
   InputFile *File = createObjectFile(MB, ArchiveName, OffsetInArchive);
   File->GroupId = GroupId;
@@ -1481,7 +1481,8 @@ InputFile *LazyObjFile::fetch() {
   // Copy symbol vector so that the new InputFile doesn't have to
   // insert the same defined symbols to the symbol table again.
   File->Symbols = std::move(Symbols);
-  return File;
+
+  parseFile(File);
 }
 
 template <class ELFT> void LazyObjFile::parse() {

lld/ELF/InputFiles.h

@@ -307,7 +307,7 @@ class LazyObjFile : public InputFile {
   static bool classof(const InputFile *F) { return F->kind() == LazyObjKind; }
 
   template <class ELFT> void parse();
-  InputFile *fetch();
+  void fetch();
 
 private:
   uint64_t OffsetInArchive;
@@ -322,9 +322,9 @@ class ArchiveFile : public InputFile {
 
   // Pulls out an object file that contains a definition for Sym and
   // returns it. If the same file was instantiated before, this
-  // function returns a nullptr (so we don't instantiate the same file
+  // function does nothing (so we don't instantiate the same file
   // more than once.)
-  InputFile *fetch(const Archive::Symbol &Sym);
+  void fetch(const Archive::Symbol &Sym);
 
 private:
   std::unique_ptr<Archive> File;

lld/ELF/Symbols.cpp

@@ -243,14 +243,12 @@ void Symbol::parseSymbolVersion() {
 
 void Symbol::fetch() const {
   if (auto *Sym = dyn_cast<LazyArchive>(this)) {
-    if (auto *F = cast<ArchiveFile>(Sym->File)->fetch(Sym->Sym))
-      parseFile(F);
+    cast<ArchiveFile>(Sym->File)->fetch(Sym->Sym);
     return;
   }
 
   if (auto *Sym = dyn_cast<LazyObject>(this)) {
-    if (auto *F = dyn_cast<LazyObjFile>(Sym->File)->fetch())
-      parseFile(F);
+    dyn_cast<LazyObjFile>(Sym->File)->fetch();
     return;
   }