diff options
Diffstat (limited to 'lib/Target/ARM/MCTargetDesc/ARMTargetStreamer.cpp')
-rw-r--r-- | lib/Target/ARM/MCTargetDesc/ARMTargetStreamer.cpp | 235 |
1 files changed, 28 insertions, 207 deletions
diff --git a/lib/Target/ARM/MCTargetDesc/ARMTargetStreamer.cpp b/lib/Target/ARM/MCTargetDesc/ARMTargetStreamer.cpp index e3cfb05..ad3f1ca 100644 --- a/lib/Target/ARM/MCTargetDesc/ARMTargetStreamer.cpp +++ b/lib/Target/ARM/MCTargetDesc/ARMTargetStreamer.cpp @@ -11,147 +11,12 @@ // //===----------------------------------------------------------------------===// #include "llvm/ADT/MapVector.h" +#include "llvm/MC/ConstantPools.h" #include "llvm/MC/MCContext.h" #include "llvm/MC/MCExpr.h" #include "llvm/MC/MCStreamer.h" using namespace llvm; - -namespace { -// A class to keep track of assembler-generated constant pools that are use to -// implement the ldr-pseudo. -class ConstantPool { - typedef SmallVector<std::pair<MCSymbol *, const MCExpr *>, 4> EntryVecTy; - EntryVecTy Entries; - -public: - // Initialize a new empty constant pool - ConstantPool() {} - - // Add a new entry to the constant pool in the next slot. - // \param Value is the new entry to put in the constant pool. - // - // \returns a MCExpr that references the newly inserted value - const MCExpr *addEntry(const MCExpr *Value, MCContext &Context); - - // Emit the contents of the constant pool using the provided streamer. - void emitEntries(MCStreamer &Streamer); - - // Return true if the constant pool is empty - bool empty(); -}; -} - -namespace llvm { -class AssemblerConstantPools { - // Map type used to keep track of per-Section constant pools used by the - // ldr-pseudo opcode. The map associates a section to its constant pool. The - // constant pool is a vector of (label, value) pairs. When the ldr - // pseudo is parsed we insert a new (label, value) pair into the constant pool - // for the current section and add MCSymbolRefExpr to the new label as - // an opcode to the ldr. After we have parsed all the user input we - // output the (label, value) pairs in each constant pool at the end of the - // section. - // - // We use the MapVector for the map type to ensure stable iteration of - // the sections at the end of the parse. We need to iterate over the - // sections in a stable order to ensure that we have print the - // constant pools in a deterministic order when printing an assembly - // file. - typedef MapVector<const MCSection *, ConstantPool> ConstantPoolMapTy; - ConstantPoolMapTy ConstantPools; - -public: - AssemblerConstantPools() {} - ~AssemblerConstantPools() {} - - void emitAll(MCStreamer &Streamer); - void emitForCurrentSection(MCStreamer &Streamer); - const MCExpr *addEntry(MCStreamer &Streamer, const MCExpr *Expr); - -private: - ConstantPool *getConstantPool(const MCSection *Section); - ConstantPool &getOrCreateConstantPool(const MCSection *Section); -}; -} - -// -// ConstantPool implementation -// -// Emit the contents of the constant pool using the provided streamer. -void ConstantPool::emitEntries(MCStreamer &Streamer) { - if (Entries.empty()) - return; - Streamer.EmitCodeAlignment(4); // align to 4-byte address - Streamer.EmitDataRegion(MCDR_DataRegion); - for (EntryVecTy::const_iterator I = Entries.begin(), E = Entries.end(); - I != E; ++I) { - Streamer.EmitLabel(I->first); - Streamer.EmitValue(I->second, 4); - } - Streamer.EmitDataRegion(MCDR_DataRegionEnd); - Entries.clear(); -} - -const MCExpr *ConstantPool::addEntry(const MCExpr *Value, MCContext &Context) { - MCSymbol *CPEntryLabel = Context.CreateTempSymbol(); - - Entries.push_back(std::make_pair(CPEntryLabel, Value)); - return MCSymbolRefExpr::Create(CPEntryLabel, Context); -} - -bool ConstantPool::empty() { return Entries.empty(); } - -// -// AssemblerConstantPools implementation -// -ConstantPool * -AssemblerConstantPools::getConstantPool(const MCSection *Section) { - ConstantPoolMapTy::iterator CP = ConstantPools.find(Section); - if (CP == ConstantPools.end()) - return nullptr; - - return &CP->second; -} - -ConstantPool & -AssemblerConstantPools::getOrCreateConstantPool(const MCSection *Section) { - return ConstantPools[Section]; -} - -static void emitConstantPool(MCStreamer &Streamer, const MCSection *Section, - ConstantPool &CP) { - if (!CP.empty()) { - Streamer.SwitchSection(Section); - CP.emitEntries(Streamer); - } -} - -void AssemblerConstantPools::emitAll(MCStreamer &Streamer) { - // Dump contents of assembler constant pools. - for (ConstantPoolMapTy::iterator CPI = ConstantPools.begin(), - CPE = ConstantPools.end(); - CPI != CPE; ++CPI) { - const MCSection *Section = CPI->first; - ConstantPool &CP = CPI->second; - - emitConstantPool(Streamer, Section, CP); - } -} - -void AssemblerConstantPools::emitForCurrentSection(MCStreamer &Streamer) { - const MCSection *Section = Streamer.getCurrentSection().first; - if (ConstantPool *CP = getConstantPool(Section)) { - emitConstantPool(Streamer, Section, *CP); - } -} - -const MCExpr *AssemblerConstantPools::addEntry(MCStreamer &Streamer, - const MCExpr *Expr) { - const MCSection *Section = Streamer.getCurrentSection().first; - return getOrCreateConstantPool(Section).addEntry(Expr, Streamer.getContext()); -} - // // ARMTargetStreamer Implemenation // @@ -175,78 +40,34 @@ void ARMTargetStreamer::finish() { ConstantPools->emitAll(Streamer); } // The remaining callbacks should be handled separately by each // streamer. -void ARMTargetStreamer::emitFnStart() { - llvm_unreachable("unimplemented"); -} -void ARMTargetStreamer::emitFnEnd() { - llvm_unreachable("unimplemented"); -} -void ARMTargetStreamer::emitCantUnwind() { - llvm_unreachable("unimplemented"); -} -void ARMTargetStreamer::emitPersonality(const MCSymbol *Personality) { - llvm_unreachable("unimplemented"); -} -void ARMTargetStreamer::emitPersonalityIndex(unsigned Index) { - llvm_unreachable("unimplemented"); -} -void ARMTargetStreamer::emitHandlerData() { - llvm_unreachable("unimplemented"); -} +void ARMTargetStreamer::emitFnStart() {} +void ARMTargetStreamer::emitFnEnd() {} +void ARMTargetStreamer::emitCantUnwind() {} +void ARMTargetStreamer::emitPersonality(const MCSymbol *Personality) {} +void ARMTargetStreamer::emitPersonalityIndex(unsigned Index) {} +void ARMTargetStreamer::emitHandlerData() {} void ARMTargetStreamer::emitSetFP(unsigned FpReg, unsigned SpReg, - int64_t Offset) { - llvm_unreachable("unimplemented"); -} -void ARMTargetStreamer::emitMovSP(unsigned Reg, int64_t Offset) { - llvm_unreachable("unimplemented"); -} -void ARMTargetStreamer::emitPad(int64_t Offset) { - llvm_unreachable("unimplemented"); -} -void -ARMTargetStreamer::emitRegSave(const SmallVectorImpl<unsigned> &RegList, - bool isVector) { - llvm_unreachable("unimplemented"); -} -void ARMTargetStreamer::emitUnwindRaw( - int64_t StackOffset, const SmallVectorImpl<uint8_t> &Opcodes) { - llvm_unreachable("unimplemented"); -} -void ARMTargetStreamer::switchVendor(StringRef Vendor) { - llvm_unreachable("unimplemented"); -} -void ARMTargetStreamer::emitAttribute(unsigned Attribute, unsigned Value) { - llvm_unreachable("unimplemented"); -} + int64_t Offset) {} +void ARMTargetStreamer::emitMovSP(unsigned Reg, int64_t Offset) {} +void ARMTargetStreamer::emitPad(int64_t Offset) {} +void ARMTargetStreamer::emitRegSave(const SmallVectorImpl<unsigned> &RegList, + bool isVector) {} +void ARMTargetStreamer::emitUnwindRaw(int64_t StackOffset, + const SmallVectorImpl<uint8_t> &Opcodes) { +} +void ARMTargetStreamer::switchVendor(StringRef Vendor) {} +void ARMTargetStreamer::emitAttribute(unsigned Attribute, unsigned Value) {} void ARMTargetStreamer::emitTextAttribute(unsigned Attribute, - StringRef String) { - llvm_unreachable("unimplemented"); -} + StringRef String) {} void ARMTargetStreamer::emitIntTextAttribute(unsigned Attribute, - unsigned IntValue, - StringRef StringValue) { - llvm_unreachable("unimplemented"); -} -void ARMTargetStreamer::emitArch(unsigned Arch) { - llvm_unreachable("unimplemented"); -} -void ARMTargetStreamer::emitObjectArch(unsigned Arch) { - llvm_unreachable("unimplemented"); -} -void ARMTargetStreamer::emitFPU(unsigned FPU) { - llvm_unreachable("unimplemented"); -} -void ARMTargetStreamer::finishAttributeSection() { - llvm_unreachable("unimplemented"); -} -void ARMTargetStreamer::emitInst(uint32_t Inst, char Suffix) { - llvm_unreachable("unimplemented"); -} -void ARMTargetStreamer::AnnotateTLSDescriptorSequence( - const MCSymbolRefExpr *SRE) { - llvm_unreachable("unimplemented"); -} + unsigned IntValue, + StringRef StringValue) {} +void ARMTargetStreamer::emitArch(unsigned Arch) {} +void ARMTargetStreamer::emitObjectArch(unsigned Arch) {} +void ARMTargetStreamer::emitFPU(unsigned FPU) {} +void ARMTargetStreamer::finishAttributeSection() {} +void ARMTargetStreamer::emitInst(uint32_t Inst, char Suffix) {} +void +ARMTargetStreamer::AnnotateTLSDescriptorSequence(const MCSymbolRefExpr *SRE) {} -void ARMTargetStreamer::emitThumbSet(MCSymbol *Symbol, const MCExpr *Value) { - llvm_unreachable("unimplemented"); -} +void ARMTargetStreamer::emitThumbSet(MCSymbol *Symbol, const MCExpr *Value) {} |