Check Live instead of the section type.

By the time we get here all live sections should have been combined
into InputSections.

llvm-svn: 304243

lld/ELF/LinkerScript.cpp

@@ -291,12 +291,14 @@ LinkerScript::computeInputSections(const InputSectionDescription *Cmd) {
     size_t SizeBefore = Ret.size();
 
     for (InputSectionBase *Sec : InputSections) {
-      if (!isa<InputSection>(Sec))
-        continue;
-
       if (Sec->Assigned)
         continue;
 
+      if (!Sec->Live) {
+        reportDiscarded(Sec);
+        continue;
+      }
+
       // For -emit-relocs we have to ignore entries like
       //   .rela.dyn : { *(.rela.data) }
       // which are common because they are in the default bfd script.

lld/ELF/OutputSections.cpp

@@ -351,7 +351,7 @@ static bool canMergeToProgbits(unsigned Type) {
          Type == SHT_NOTE;
 }
 
-static void reportDiscarded(InputSectionBase *IS) {
+void elf::reportDiscarded(InputSectionBase *IS) {
   if (!Config->PrintGcSections)
     return;
   message("removing unused section from '" + IS->Name + "' in file '" +

lld/ELF/OutputSections.h

@@ -149,6 +149,7 @@ private:
 };
 
 uint64_t getHeaderSize();
+void reportDiscarded(InputSectionBase *IS);
 
 } // namespace elf
 } // namespace lld