X-Git-Url: http://demsky.eecs.uci.edu/git/?a=blobdiff_plain;f=lib%2FMC%2FMCSection.cpp;h=9152f2b42a48578abc5eecffb1a58259dc269e8b;hb=00552e3875ee5f382db6c98286a241a7d0efe1b8;hp=1f2896b7ccf3fe5c373035023e3e1c02c136b722;hpb=af76e592c7f9deff0e55c13dbb4a34f07f1c7f64;p=oota-llvm.git

diff --git a/lib/MC/MCSection.cpp b/lib/MC/MCSection.cpp
index 1f2896b7ccf..9152f2b42a4 100644
--- a/lib/MC/MCSection.cpp
+++ b/lib/MC/MCSection.cpp
@@ -8,8 +8,10 @@
 //===----------------------------------------------------------------------===//
 
 #include "llvm/MC/MCSection.h"
-#include "llvm/MC/MCContext.h"
+#include "llvm/MC/MCAssembler.h"
 #include "llvm/MC/MCAsmInfo.h"
+#include "llvm/MC/MCContext.h"
+#include "llvm/MC/MCSymbol.h"
 #include "llvm/Support/raw_ostream.h"
 using namespace llvm;
 
@@ -17,29 +19,91 @@ using namespace llvm;
 // MCSection
 //===----------------------------------------------------------------------===//
 
-MCSection::~MCSection() {
+MCSection::MCSection(SectionVariant V, SectionKind K, MCSymbol *Begin)
+    : Begin(Begin), BundleGroupBeforeFirstInst(false), HasInstructions(false),
+      IsRegistered(false), Variant(V), Kind(K) {}
+
+MCSymbol *MCSection::getEndSymbol(MCContext &Ctx) {
+  if (!End)
+    End = Ctx.createTempSymbol("sec_end", true);
+  return End;
 }
 
-//===----------------------------------------------------------------------===//
-// MCSectionCOFF
-//===----------------------------------------------------------------------===//
+bool MCSection::hasEnded() const { return End && End->isInSection(); }
 
-MCSectionCOFF *MCSectionCOFF::
-Create(const StringRef &Name, bool IsDirective, SectionKind K, MCContext &Ctx) {
-  return new (Ctx) MCSectionCOFF(Name, IsDirective, K);
+MCSection::~MCSection() {
 }
 
-void MCSectionCOFF::PrintSwitchToSection(const MCAsmInfo &TAI,
-                                         raw_ostream &OS) const {
-  
-  if (isDirective()) {
-    OS << getName() << '\n';
+void MCSection::setBundleLockState(BundleLockStateType NewState) {
+  if (NewState == NotBundleLocked) {
+    if (BundleLockNestingDepth == 0) {
+      report_fatal_error("Mismatched bundle_lock/unlock directives");
+    }
+    if (--BundleLockNestingDepth == 0) {
+      BundleLockState = NotBundleLocked;
+    }
     return;
   }
-  OS << "\t.section\t" << getName() << ",\"";
-  if (getKind().isText())
-    OS << 'x';
-  if (getKind().isWriteable())
-    OS << 'w';
-  OS << "\"\n";
+
+  // If any of the directives is an align_to_end directive, the whole nested
+  // group is align_to_end. So don't downgrade from align_to_end to just locked.
+  if (BundleLockState != BundleLockedAlignToEnd) {
+    BundleLockState = NewState;
+  }
+  ++BundleLockNestingDepth;
 }
+
+MCSection::iterator
+MCSection::getSubsectionInsertionPoint(unsigned Subsection) {
+  if (Subsection == 0 && SubsectionFragmentMap.empty())
+    return end();
+
+  SmallVectorImpl<std::pair<unsigned, MCFragment *>>::iterator MI =
+      std::lower_bound(SubsectionFragmentMap.begin(),
+                       SubsectionFragmentMap.end(),
+                       std::make_pair(Subsection, (MCFragment *)nullptr));
+  bool ExactMatch = false;
+  if (MI != SubsectionFragmentMap.end()) {
+    ExactMatch = MI->first == Subsection;
+    if (ExactMatch)
+      ++MI;
+  }
+  iterator IP;
+  if (MI == SubsectionFragmentMap.end())
+    IP = end();
+  else
+    IP = MI->second;
+  if (!ExactMatch && Subsection != 0) {
+    // The GNU as documentation claims that subsections have an alignment of 4,
+    // although this appears not to be the case.
+    MCFragment *F = new MCDataFragment();
+    SubsectionFragmentMap.insert(MI, std::make_pair(Subsection, F));
+    getFragmentList().insert(IP, F);
+    F->setParent(this);
+  }
+
+  return IP;
+}
+
+#if !defined(NDEBUG) || defined(LLVM_ENABLE_DUMP)
+void MCSection::dump() {
+  raw_ostream &OS = llvm::errs();
+
+  OS << "<MCSection";
+  OS << " Fragments:[\n      ";
+  for (auto it = begin(), ie = end(); it != ie; ++it) {
+    if (it != begin())
+      OS << ",\n      ";
+    it->dump();
+  }
+  OS << "]>";
+}
+#endif
+
+MCSection::iterator MCSection::begin() { return Fragments.begin(); }
+
+MCSection::iterator MCSection::end() { return Fragments.end(); }
+
+MCSection::reverse_iterator MCSection::rbegin() { return Fragments.rbegin(); }
+
+MCSection::reverse_iterator MCSection::rend() { return Fragments.rend(); }