[ELF] Rename OutputSection::sectionCommands to commands. NFC

This partially reverts r315409: the description applies to LinkerScript, but not
to OutputSection.

The name "sectionCommands" is used in both LinkerScript::sectionCommands and
OutputSection::sectionCommands, which may lead to confusion.
"commands" in OutputSection has no ambiguity because there are no other types
of commands.
GitOrigin-RevId: 6188fd495744ffea76f481a960df9beacb8ce91b
diff --git a/ELF/AArch64ErrataFix.cpp b/ELF/AArch64ErrataFix.cpp
index b9fd4cd..331a578 100644
--- a/ELF/AArch64ErrataFix.cpp
+++ b/ELF/AArch64ErrataFix.cpp
@@ -630,7 +630,7 @@
   for (OutputSection *os : outputSections) {
     if (!(os->flags & SHF_ALLOC) || !(os->flags & SHF_EXECINSTR))
       continue;
-    for (BaseCommand *bc : os->sectionCommands)
+    for (BaseCommand *bc : os->commands)
       if (auto *isd = dyn_cast<InputSectionDescription>(bc)) {
         std::vector<Patch843419Section *> patches =
             patchInputSectionDescription(*isd);
diff --git a/ELF/ARMErrataFix.cpp b/ELF/ARMErrataFix.cpp
index 7762378..bf41f65 100644
--- a/ELF/ARMErrataFix.cpp
+++ b/ELF/ARMErrataFix.cpp
@@ -525,7 +525,7 @@
   for (OutputSection *os : outputSections) {
     if (!(os->flags & SHF_ALLOC) || !(os->flags & SHF_EXECINSTR))
       continue;
-    for (BaseCommand *bc : os->sectionCommands)
+    for (BaseCommand *bc : os->commands)
       if (auto *isd = dyn_cast<InputSectionDescription>(bc)) {
         std::vector<Patch657417Section *> patches =
             patchInputSectionDescription(*isd);
diff --git a/ELF/ICF.cpp b/ELF/ICF.cpp
index c139698..b35e46b 100644
--- a/ELF/ICF.cpp
+++ b/ELF/ICF.cpp
@@ -554,7 +554,7 @@
   // ICF may fold some input sections assigned to output sections. Remove them.
   for (BaseCommand *base : script->sectionCommands)
     if (auto *sec = dyn_cast<OutputSection>(base))
-      for (BaseCommand *sub_base : sec->sectionCommands)
+      for (BaseCommand *sub_base : sec->commands)
         if (auto *isd = dyn_cast<InputSectionDescription>(sub_base))
           llvm::erase_if(isd->sections,
                          [](InputSection *isec) { return !isec->isLive(); });
diff --git a/ELF/LinkerScript.cpp b/ELF/LinkerScript.cpp
index 5e09e5d..d9346c8 100644
--- a/ELF/LinkerScript.cpp
+++ b/ELF/LinkerScript.cpp
@@ -285,7 +285,7 @@
                         std::make_pair(cmd->sym->section, cmd->sym->value));
       continue;
     }
-    for (BaseCommand *sub_base : cast<OutputSection>(base)->sectionCommands)
+    for (BaseCommand *sub_base : cast<OutputSection>(base)->commands)
       if (auto *cmd = dyn_cast<SymbolAssignment>(sub_base))
         if (cmd->sym)
           ret.try_emplace(cmd->sym,
@@ -360,7 +360,7 @@
     auto *sec = cast<OutputSection>(base);
     if (sec->constraint != ConstraintKind::NoConstraint)
       continue;
-    for (BaseCommand *base2 : sec->sectionCommands)
+    for (BaseCommand *base2 : sec->commands)
       if (auto *cmd = dyn_cast<SymbolAssignment>(base2))
         declareSymbol(cmd);
   }
@@ -588,7 +588,7 @@
       continue;
     std::vector<InputSectionBase *> secs(part.armExidx->exidxSections.begin(),
                                          part.armExidx->exidxSections.end());
-    for (BaseCommand *base : outCmd.sectionCommands)
+    for (BaseCommand *base : outCmd.commands)
       if (auto *cmd = dyn_cast<InputSectionDescription>(base)) {
         std::vector<InputSectionBase *> matches =
             computeInputSections(cmd, secs);
@@ -602,7 +602,7 @@
 LinkerScript::createInputSectionList(OutputSection &outCmd) {
   std::vector<InputSectionBase *> ret;
 
-  for (BaseCommand *base : outCmd.sectionCommands) {
+  for (BaseCommand *base : outCmd.commands) {
     if (auto *cmd = dyn_cast<InputSectionDescription>(base)) {
       cmd->sectionBases = computeInputSections(cmd, inputSections);
       for (InputSectionBase *s : cmd->sectionBases)
@@ -624,7 +624,7 @@
       for (InputSectionBase *s : v)
         discard(s);
       discardSynthetic(*osec);
-      osec->sectionCommands.clear();
+      osec->commands.clear();
       return false;
     }
 
@@ -638,7 +638,7 @@
     if (!matchConstraints(v, osec->constraint)) {
       for (InputSectionBase *s : v)
         s->parent = nullptr;
-      osec->sectionCommands.clear();
+      osec->commands.clear();
       return false;
     }
 
@@ -703,7 +703,7 @@
     if (auto *cmd = dyn_cast<SymbolAssignment>(base))
       addSymbol(cmd);
     else
-      for (BaseCommand *sub_base : cast<OutputSection>(base)->sectionCommands)
+      for (BaseCommand *sub_base : cast<OutputSection>(base)->commands)
         if (auto *cmd = dyn_cast<SymbolAssignment>(sub_base))
           addSymbol(cmd);
   }
@@ -813,8 +813,7 @@
       // end up being linked to the same output section. The casts are fine
       // because everything in the map was created by the orphan placement code.
       auto *firstIsec = cast<InputSectionBase>(
-          cast<InputSectionDescription>(sec->sectionCommands[0])
-              ->sectionBases[0]);
+          cast<InputSectionDescription>(sec->commands[0])->sectionBases[0]);
       OutputSection *firstIsecOut =
           firstIsec->flags & SHF_LINK_ORDER
               ? firstIsec->getLinkOrderDep()->getOutputSection()
@@ -1059,7 +1058,7 @@
   // We visited SectionsCommands from processSectionCommands to
   // layout sections. Now, we visit SectionsCommands again to fix
   // section offsets.
-  for (BaseCommand *base : sec->sectionCommands) {
+  for (BaseCommand *base : sec->commands) {
     // This handles the assignments to symbol or to the dot.
     if (auto *cmd = dyn_cast<SymbolAssignment>(base)) {
       cmd->addr = dot;
@@ -1110,7 +1109,7 @@
   if (sec.usedInExpression)
     return false;
 
-  for (BaseCommand *base : sec.sectionCommands) {
+  for (BaseCommand *base : sec.commands) {
     if (auto cmd = dyn_cast<SymbolAssignment>(base))
       // Don't create empty output sections just for unreferenced PROVIDE
       // symbols.
diff --git a/ELF/MapFile.cpp b/ELF/MapFile.cpp
index c4690ae..9ae8d7b 100644
--- a/ELF/MapFile.cpp
+++ b/ELF/MapFile.cpp
@@ -179,7 +179,7 @@
     os << osec->name << '\n';
 
     // Dump symbols for each input section.
-    for (BaseCommand *base : osec->sectionCommands) {
+    for (BaseCommand *base : osec->commands) {
       if (auto *isd = dyn_cast<InputSectionDescription>(base)) {
         for (InputSection *isec : isd->sections) {
           if (auto *ehSec = dyn_cast<EhFrameSection>(isec)) {
diff --git a/ELF/OutputSections.cpp b/ELF/OutputSections.cpp
index cc4f068..8890427 100644
--- a/ELF/OutputSections.cpp
+++ b/ELF/OutputSections.cpp
@@ -100,10 +100,9 @@
 void OutputSection::recordSection(InputSectionBase *isec) {
   partition = isec->partition;
   isec->parent = this;
-  if (sectionCommands.empty() ||
-      !isa<InputSectionDescription>(sectionCommands.back()))
-    sectionCommands.push_back(make<InputSectionDescription>(""));
-  auto *isd = cast<InputSectionDescription>(sectionCommands.back());
+  if (commands.empty() || !isa<InputSectionDescription>(commands.back()))
+    commands.push_back(make<InputSectionDescription>(""));
+  auto *isd = cast<InputSectionDescription>(commands.back());
   isd->sectionBases.push_back(isec);
 }
 
@@ -166,7 +165,7 @@
 // to compute an output offset for each piece of each input section.
 void OutputSection::finalizeInputSections() {
   std::vector<MergeSyntheticSection *> mergeSections;
-  for (BaseCommand *base : sectionCommands) {
+  for (BaseCommand *base : commands) {
     auto *cmd = dyn_cast<InputSectionDescription>(base);
     if (!cmd)
       continue;
@@ -243,7 +242,7 @@
 
 void OutputSection::sort(llvm::function_ref<int(InputSectionBase *s)> order) {
   assert(isLive());
-  for (BaseCommand *b : sectionCommands)
+  for (BaseCommand *b : commands)
     if (auto *isd = dyn_cast<InputSectionDescription>(b))
       sortByOrder(isd->sections, order);
 }
@@ -367,7 +366,7 @@
 
   // Linker scripts may have BYTE()-family commands with which you
   // can write arbitrary bytes to the output. Process them if any.
-  for (BaseCommand *base : sectionCommands)
+  for (BaseCommand *base : commands)
     if (auto *data = dyn_cast<ByteCommand>(base))
       writeInt(buf + data->offset, data->expression().getValue(), data->size);
 }
@@ -485,8 +484,8 @@
 // Unfortunately, the rules are different from the one for .{init,fini}_array.
 // Read the comment above.
 void OutputSection::sortCtorsDtors() {
-  assert(sectionCommands.size() == 1);
-  auto *isd = cast<InputSectionDescription>(sectionCommands[0]);
+  assert(commands.size() == 1);
+  auto *isd = cast<InputSectionDescription>(commands[0]);
   llvm::stable_sort(isd->sections, compCtors);
 }
 
@@ -505,7 +504,7 @@
 }
 
 InputSection *elf::getFirstInputSection(const OutputSection *os) {
-  for (BaseCommand *base : os->sectionCommands)
+  for (BaseCommand *base : os->commands)
     if (auto *isd = dyn_cast<InputSectionDescription>(base))
       if (!isd->sections.empty())
         return isd->sections[0];
@@ -514,7 +513,7 @@
 
 std::vector<InputSection *> elf::getInputSections(const OutputSection *os) {
   std::vector<InputSection *> ret;
-  for (BaseCommand *base : os->sectionCommands)
+  for (BaseCommand *base : os->commands)
     if (auto *isd = dyn_cast<InputSectionDescription>(base))
       ret.insert(ret.end(), isd->sections.begin(), isd->sections.end());
   return ret;
diff --git a/ELF/OutputSections.h b/ELF/OutputSections.h
index a0f8066..fe9fd4e 100644
--- a/ELF/OutputSections.h
+++ b/ELF/OutputSections.h
@@ -82,7 +82,7 @@
   Expr alignExpr;
   Expr lmaExpr;
   Expr subalignExpr;
-  std::vector<BaseCommand *> sectionCommands;
+  std::vector<BaseCommand *> commands;
   std::vector<StringRef> phdrs;
   llvm::Optional<std::array<uint8_t, 4>> filler;
   ConstraintKind constraint = ConstraintKind::NoConstraint;
diff --git a/ELF/Relocations.cpp b/ELF/Relocations.cpp
index 9c22ce7..023a04f 100644
--- a/ELF/Relocations.cpp
+++ b/ELF/Relocations.cpp
@@ -366,10 +366,10 @@
 
   // At this point, sectionBases has been migrated to sections. Append sec to
   // sections.
-  if (osec->sectionCommands.empty() ||
-      !isa<InputSectionDescription>(osec->sectionCommands.back()))
-    osec->sectionCommands.push_back(make<InputSectionDescription>(""));
-  auto *isd = cast<InputSectionDescription>(osec->sectionCommands.back());
+  if (osec->commands.empty() ||
+      !isa<InputSectionDescription>(osec->commands.back()))
+    osec->commands.push_back(make<InputSectionDescription>(""));
+  auto *isd = cast<InputSectionDescription>(osec->commands.back());
   isd->sections.push_back(sec);
   osec->commitSection(sec);
 
@@ -1640,7 +1640,7 @@
   for (OutputSection *os : outputSections) {
     if (!(os->flags & SHF_ALLOC) || !(os->flags & SHF_EXECINSTR))
       continue;
-    for (BaseCommand *bc : os->sectionCommands)
+    for (BaseCommand *bc : os->commands)
       if (auto *isd = dyn_cast<InputSectionDescription>(bc))
         fn(os, isd);
   }
@@ -1817,7 +1817,7 @@
   // Find InputSectionRange within Target Output Section (TOS) that the
   // InputSection (IS) that we need to precede is in.
   OutputSection *tos = isec->getParent();
-  for (BaseCommand *bc : tos->sectionCommands) {
+  for (BaseCommand *bc : tos->commands) {
     auto *isd = dyn_cast<InputSectionDescription>(bc);
     if (!isd || isd->sections.empty())
       continue;
diff --git a/ELF/ScriptParser.cpp b/ELF/ScriptParser.cpp
index cc18a59..d91caed 100644
--- a/ELF/ScriptParser.cpp
+++ b/ELF/ScriptParser.cpp
@@ -849,7 +849,7 @@
     uint64_t withoutFlags = 0;
     if (consume("INPUT_SECTION_FLAGS"))
       std::tie(withFlags, withoutFlags) = readInputSectionFlags();
-    cmd->sectionCommands.push_back(
+    cmd->commands.push_back(
         readInputSectionRules(next(), withFlags, withoutFlags));
   }
   return cmd;
@@ -885,9 +885,9 @@
     if (tok == ";") {
       // Empty commands are allowed. Do nothing here.
     } else if (SymbolAssignment *assign = readAssignment(tok)) {
-      cmd->sectionCommands.push_back(assign);
+      cmd->commands.push_back(assign);
     } else if (ByteCommand *data = readByteCommand(tok)) {
-      cmd->sectionCommands.push_back(data);
+      cmd->commands.push_back(data);
     } else if (tok == "CONSTRUCTORS") {
       // CONSTRUCTORS is a keyword to make the linker recognize C++ ctors/dtors
       // by name. This is for very old file formats such as ECOFF/XCOFF.
@@ -904,7 +904,7 @@
     } else if (tok == "INCLUDE") {
       readInclude();
     } else if (peek() == "(") {
-      cmd->sectionCommands.push_back(readInputSectionDescription(tok));
+      cmd->commands.push_back(readInputSectionDescription(tok));
     } else {
       // We have a file name and no input sections description. It is not a
       // commonly used syntax, but still acceptable. In that case, all sections
@@ -914,7 +914,7 @@
       // case above.
       auto *isd = make<InputSectionDescription>(tok);
       isd->sectionPatterns.push_back({{}, StringMatcher("*")});
-      cmd->sectionCommands.push_back(isd);
+      cmd->commands.push_back(isd);
     }
   }
 
diff --git a/ELF/SyntheticSections.cpp b/ELF/SyntheticSections.cpp
index 3936f0f..0413e31 100644
--- a/ELF/SyntheticSections.cpp
+++ b/ELF/SyntheticSections.cpp
@@ -900,7 +900,7 @@
          got.pagesMap) {
       const OutputSection *os = p.first;
       uint64_t secSize = 0;
-      for (BaseCommand *cmd : os->sectionCommands) {
+      for (BaseCommand *cmd : os->commands) {
         if (auto *isd = dyn_cast<InputSectionDescription>(cmd))
           for (InputSection *isec : isd->sections) {
             uint64_t off = alignTo(secSize, isec->alignment);
@@ -3604,7 +3604,7 @@
 bool PPC32Got2Section::isNeeded() const {
   // See the comment below. This is not needed if there is no other
   // InputSection.
-  for (BaseCommand *base : getParent()->sectionCommands)
+  for (BaseCommand *base : getParent()->commands)
     if (auto *isd = dyn_cast<InputSectionDescription>(base))
       for (InputSection *isec : isd->sections)
         if (isec != this)
@@ -3618,7 +3618,7 @@
   // PPC32PltCallStub::writeTo(). The purpose of this empty synthetic section is
   // to collect input sections named ".got2".
   uint32_t offset = 0;
-  for (BaseCommand *base : getParent()->sectionCommands)
+  for (BaseCommand *base : getParent()->commands)
     if (auto *isd = dyn_cast<InputSectionDescription>(base)) {
       for (InputSection *isec : isd->sections) {
         if (isec == this)
diff --git a/ELF/Writer.cpp b/ELF/Writer.cpp
index da7fd78..59a7519 100644
--- a/ELF/Writer.cpp
+++ b/ELF/Writer.cpp
@@ -729,12 +729,12 @@
     auto *sec = dyn_cast<OutputSection>(base);
     if (!sec)
       continue;
-    auto i = llvm::find_if(sec->sectionCommands, [](BaseCommand *base) {
+    auto i = llvm::find_if(sec->commands, [](BaseCommand *base) {
       if (auto *isd = dyn_cast<InputSectionDescription>(base))
         return !isd->sections.empty();
       return false;
     });
-    if (i == sec->sectionCommands.end())
+    if (i == sec->commands.end())
       continue;
     InputSectionBase *isec = cast<InputSectionDescription>(*i)->sections[0];
 
@@ -1420,7 +1420,7 @@
   // digit radix sort. The sections may be sorted stably again by a more
   // significant key.
   if (!order.empty())
-    for (BaseCommand *b : sec->sectionCommands)
+    for (BaseCommand *b : sec->commands)
       if (auto *isd = dyn_cast<InputSectionDescription>(b))
         sortISDBySectionOrder(isd, order);
 
@@ -1437,8 +1437,8 @@
     // addressable range of [.got, .got + 0xFFFC] for GOT-relative relocations.
     // To reduce the risk of relocation overflow, .toc contents are sorted so
     // that sections having smaller relocation offsets are at beginning of .toc
-    assert(sec->sectionCommands.size() == 1);
-    auto *isd = cast<InputSectionDescription>(sec->sectionCommands[0]);
+    assert(sec->commands.size() == 1);
+    auto *isd = cast<InputSectionDescription>(sec->commands[0]);
     llvm::stable_sort(isd->sections,
                       [](const InputSection *a, const InputSection *b) -> bool {
                         return a->file->ppc64SmallCodeModelTocRelocs &&
@@ -1608,7 +1608,7 @@
     // Sorting is performed separately.
     std::vector<InputSection **> scriptSections;
     std::vector<InputSection *> sections;
-    for (BaseCommand *base : sec->sectionCommands) {
+    for (BaseCommand *base : sec->commands) {
       auto *isd = dyn_cast<InputSectionDescription>(base);
       if (!isd)
         continue;
@@ -1842,7 +1842,7 @@
         // If we reach here, then ss is an unused synthetic section and we want
         // to remove it from the corresponding input section description, and
         // orphanSections.
-        for (BaseCommand *b : os->sectionCommands)
+        for (BaseCommand *b : os->commands)
           if (auto *isd = dyn_cast<InputSectionDescription>(b))
             isdSet.insert(isd);