//===----------------------------------------------------------------------===//
#include "llvm/MC/MCSection.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;
-MCSection::~MCSection() {
-}
+//===----------------------------------------------------------------------===//
+// MCSection
+//===----------------------------------------------------------------------===//
+
+MCSection::MCSection(SectionVariant V, SectionKind K, MCSymbol *Begin)
+ : Begin(Begin), HasInstructions(false), Variant(V), Kind(K) {}
-MCSection::MCSection(const StringRef &N, bool isDirective, SectionKind K,
- MCContext &Ctx)
- : Name(N), IsDirective(isDirective), Kind(K) {
- MCSection *&Entry = Ctx.Sections[Name];
- assert(Entry == 0 && "Multiple sections with the same name created");
- Entry = this;
+MCSymbol *MCSection::getEndSymbol(MCContext &Ctx) {
+ if (!End)
+ End = Ctx.createTempSymbol("sec_end", true);
+ return End;
}
-MCSection *MCSection::
-Create(const StringRef &Name, bool IsDirective, SectionKind K, MCContext &Ctx) {
- return new (Ctx) MCSection(Name, IsDirective, K, Ctx);
+bool MCSection::hasEnded() const { return End && End->isInSection(); }
+
+MCSection::~MCSection() {
}
+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;
+ }
-MCSectionELF *MCSectionELF::
-Create(const StringRef &Name, bool IsDirective, SectionKind K, MCContext &Ctx) {
- return new (Ctx) MCSectionELF(Name, IsDirective, K, Ctx);
+ // 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);
+ }
-MCSectionMachO *MCSectionMachO::
-Create(const StringRef &Name, bool IsDirective, SectionKind K, MCContext &Ctx) {
- return new (Ctx) MCSectionMachO(Name, IsDirective, K, Ctx);
+ return IP;
}
+#if !defined(NDEBUG) || defined(LLVM_ENABLE_DUMP)
+void MCSection::dump() {
+ raw_ostream &OS = llvm::errs();
-MCSectionPECOFF *MCSectionPECOFF::
-Create(const StringRef &Name, bool IsDirective, SectionKind K, MCContext &Ctx) {
- return new (Ctx) MCSectionPECOFF(Name, IsDirective, K, Ctx);
+ 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(); }