[lld][ELF] Simplify handleLibcall. NFC

[sbc100]

I noticed this while working on #78658

[llvmbot]

@llvm/pr-subscribers-lld-elf

@llvm/pr-subscribers-lld

Author: Sam Clegg (sbc100)

Changes

I noticed this while working on #78658

---

Full diff: https://github.com/llvm/llvm-project/pull/78659.diff

1 Files Affected:

• (modified) lld/ELF/Driver.cpp (+1-7)

diff --git a/lld/ELF/Driver.cpp b/lld/ELF/Driver.cpp
index 5ccc65600dcb91..07f4263c90e62b 100644
--- a/lld/ELF/Driver.cpp
+++ b/lld/ELF/Driver.cpp
@@ -2081,13 +2081,7 @@ static void handleUndefinedGlob(StringRef arg) {
 
 static void handleLibcall(StringRef name) {
   Symbol *sym = symtab.find(name);
-  if (!sym || !sym->isLazy())
-    return;
-
-  MemoryBufferRef mb;
-  mb = cast<LazyObject>(sym)->file->mb;
-
-  if (isBitcode(mb))
+  if (sym && sym->isLazy() && isa<BitcodeFile>(sym->file))
     sym->extract();
 }
 

[MaskRay]

Thanks! I think this opportunity is enabled by my previous change removing LazyArchive https://reviews.llvm.org/D119074