[ELF] Remove one inputSections loop. NFC

Author: MaskRay

lld/ELF/Driver.cpp

@@ -2779,9 +2779,6 @@ void LinkerDriver::link(opt::InputArgList &args) {
     for (SectionCommand *cmd : script->sectionCommands)
       if (auto *osd = dyn_cast<OutputDesc>(cmd))
         osd->osec.finalizeInputSections();
-    llvm::erase_if(inputSections, [](InputSectionBase *s) {
-      return isa<MergeInputSection>(s);
-    });
   }
 
   // Two input sections with different output sections should not be folded.

lld/ELF/LinkerScript.cpp

@@ -846,7 +846,11 @@ void LinkerScript::addOrphanSections() {
   // to be created before we create relocation output section, so we want
   // to create target sections first. We do not want priority handling
   // for synthetic sections because them are special.
+  size_t n = 0;
   for (InputSectionBase *isec : inputSections) {
+    if (!isa<MergeInputSection>(isec))
+      inputSections[n++] = isec;
+
     // In -r links, SHF_LINK_ORDER sections are added while adding their parent
     // sections because we need to know the parent's output section before we
     // can select an output section for the SHF_LINK_ORDER section.
@@ -863,6 +867,7 @@ void LinkerScript::addOrphanSections() {
         if (depSec->flags & SHF_LINK_ORDER)
           add(depSec);
   }
+  inputSections.resize(n);
 
   // If no SECTIONS command was given, we should insert sections commands
   // before others, so that we can handle scripts which refers them,