Use std::unique_ptr. NFC.

[oota-llvm.git] / lib / MC / MCSection.cpp

diff --git a/lib/MC/MCSection.cpp b/lib/MC/MCSection.cpp
index 8b7fcd2815c251a0dc31f2726ab9ea41d7b2280e..dbd544a44ce32afd56ae34891ecd5f975c65e1b4 100644 (file)
--- a/lib/MC/MCSection.cpp
+++ b/lib/MC/MCSection.cpp
@@ -8,8 +8,10 @@
 //===----------------------------------------------------------------------===//
 
 #include "llvm/MC/MCSection.h"
+#include "llvm/MC/MCAssembler.h"
+#include "llvm/MC/MCAsmInfo.h"
 #include "llvm/MC/MCContext.h"
-#include "llvm/Target/TargetAsmInfo.h"
+#include "llvm/MC/MCSymbol.h"
 #include "llvm/Support/raw_ostream.h"
 using namespace llvm;
 
@@ -17,114 +19,91 @@ using namespace llvm;
 // MCSection
 //===----------------------------------------------------------------------===//
 
-MCSection::~MCSection() {
-}
+MCSection::MCSection(SectionVariant V, SectionKind K, MCSymbol *Begin)
+    : Begin(Begin), BundleGroupBeforeFirstInst(false), HasInstructions(false),
+      IsRegistered(false), DummyFragment(this), Variant(V), Kind(K) {}
 
+MCSymbol *MCSection::getEndSymbol(MCContext &Ctx) {
+  if (!End)
+    End = Ctx.createTempSymbol("sec_end", true);
+  return End;
+}
 
-//===----------------------------------------------------------------------===//
-// MCSectionELF
-//===----------------------------------------------------------------------===//
+bool MCSection::hasEnded() const { return End && End->isInSection(); }
 
-MCSectionELF *MCSectionELF::
-Create(const StringRef &Name, bool IsDirective, SectionKind K, MCContext &Ctx) {
-  return new (Ctx) MCSectionELF(Name, IsDirective, K);
+MCSection::~MCSection() {
 }
 
-void MCSectionELF::PrintSwitchToSection(const TargetAsmInfo &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();
-  
-  // Handle the weird solaris syntax if desired.
-  if (TAI.usesSunStyleELFSectionSwitchSyntax() &&
-      !getKind().isMergeableConst() && !getKind().isMergeableCString()) {
-    if (!getKind().isMetadata())
-      OS << ",#alloc";
-    if (getKind().isText())
-      OS << ",#execinstr";
-    if (getKind().isWriteable())
-      OS << ",#write";
-    if (getKind().isThreadLocal())
-      OS << ",#tls";
-  } else {
-    OS << ",\"";
-  
-    if (!getKind().isMetadata())
-      OS << 'a';
-    if (getKind().isText())
-      OS << 'x';
-    if (getKind().isWriteable())
-      OS << 'w';
-    if (getKind().isMergeable1ByteCString() ||
-        getKind().isMergeable2ByteCString() ||
-        getKind().isMergeable4ByteCString() ||
-        getKind().isMergeableConst4() ||
-        getKind().isMergeableConst8() ||
-        getKind().isMergeableConst16())
-      OS << 'M';
-    if (getKind().isMergeable1ByteCString() ||
-        getKind().isMergeable2ByteCString() ||
-        getKind().isMergeable4ByteCString())
-      OS << 'S';
-    if (getKind().isThreadLocal())
-      OS << 'T';
-    
-    OS << "\",";
-    
-    // If comment string is '@', e.g. as on ARM - use '%' instead
-    if (TAI.getCommentString()[0] == '@')
-      OS << '%';
-    else
-      OS << '@';
-    
-    if (getKind().isBSS() || getKind().isThreadBSS())
-      OS << "nobits";
-    else
-      OS << "progbits";
-    
-    if (getKind().isMergeable1ByteCString()) {
-      OS << ",1";
-    } else if (getKind().isMergeable2ByteCString()) {
-      OS << ",2";
-    } else if (getKind().isMergeable4ByteCString()) {
-      OS << ",4";
-    } else if (getKind().isMergeableConst4()) {
-      OS << ",4";
-    } else if (getKind().isMergeableConst8()) {
-      OS << ",8";
-    } else if (getKind().isMergeableConst16()) {
-      OS << ",16";
-    }
+  // 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;
   }
-  
-  OS << '\n';
+  ++BundleLockNestingDepth;
 }
 
+MCSection::iterator
+MCSection::getSubsectionInsertionPoint(unsigned Subsection) {
+  if (Subsection == 0 && SubsectionFragmentMap.empty())
+    return end();
 
-//===----------------------------------------------------------------------===//
-// MCSectionCOFF
-//===----------------------------------------------------------------------===//
+  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->getIterator();
+  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);
+  }
 
-MCSectionCOFF *MCSectionCOFF::
-Create(const StringRef &Name, bool IsDirective, SectionKind K, MCContext &Ctx) {
-  return new (Ctx) MCSectionCOFF(Name, IsDirective, K);
+  return IP;
 }
 
-void MCSectionCOFF::PrintSwitchToSection(const TargetAsmInfo &TAI,
-                                         raw_ostream &OS) const {
-  
-  if (isDirective()) {
-    OS << getName() << '\n';
-    return;
+#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 << "\t.section\t" << getName() << ",\"";
-  if (getKind().isText())
-    OS << 'x';
-  if (getKind().isWriteable())
-    OS << 'w';
-  OS << "\"\n";
+  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(); }