#ifndef LLVM_TARGET_ASM_INFO_H
#define LLVM_TARGET_ASM_INFO_H
-#include "llvm/CodeGen/MachineFunctionPass.h"
+#include "llvm/ADT/DenseMap.h"
+#include "llvm/ADT/StringMap.h"
#include "llvm/Support/DataTypes.h"
+#include <string>
namespace llvm {
// DWARF encoding query type
};
}
+ namespace SectionKind {
+ enum Kind {
+ Unknown = 0, ///< Custom section
+ Text, ///< Text section
+ Data, ///< Data section
+ BSS, ///< BSS section
+ ROData, ///< Readonly data section
+ RODataMergeStr, ///< Readonly data section (mergeable strings)
+ RODataMergeConst, ///< Readonly data section (mergeable constants)
+ SmallData, ///< Small data section
+ SmallBSS, ///< Small bss section
+ SmallROData, ///< Small readonly section
+ ThreadData, ///< Initialized TLS data objects
+ ThreadBSS ///< Uninitialized TLS data objects
+ };
+
+ static inline bool isReadOnly(Kind K) {
+ return (K == SectionKind::ROData ||
+ K == SectionKind::RODataMergeConst ||
+ K == SectionKind::RODataMergeStr ||
+ K == SectionKind::SmallROData);
+ }
+
+ static inline bool isBSS(Kind K) {
+ return (K == SectionKind::BSS ||
+ K == SectionKind::SmallBSS);
+ }
+ }
+
+ namespace SectionFlags {
+ const unsigned Invalid = -1U;
+ const unsigned None = 0;
+ const unsigned Code = 1 << 0; ///< Section contains code
+ const unsigned Writeable = 1 << 1; ///< Section is writeable
+ const unsigned BSS = 1 << 2; ///< Section contains only zeroes
+ const unsigned Mergeable = 1 << 3; ///< Section contains mergeable data
+ const unsigned Strings = 1 << 4; ///< Section contains C-type strings
+ const unsigned TLS = 1 << 5; ///< Section contains thread-local data
+ const unsigned Debug = 1 << 6; ///< Section contains debug data
+ const unsigned Linkonce = 1 << 7; ///< Section is linkonce
+ const unsigned Small = 1 << 8; ///< Section is small
+ const unsigned TypeFlags = 0xFF;
+ // Some gap for future flags
+ const unsigned Named = 1 << 23; ///< Section is named
+ const unsigned EntitySize = 0xFF << 24; ///< Entity size for mergeable stuff
+
+ static inline unsigned getEntitySize(unsigned Flags) {
+ return (Flags >> 24) & 0xFF;
+ }
+
+ static inline unsigned setEntitySize(unsigned Flags, unsigned Size) {
+ return ((Flags & ~EntitySize) | ((Size & 0xFF) << 24));
+ }
+
+ struct KeyInfo {
+ static inline unsigned getEmptyKey() { return Invalid; }
+ static inline unsigned getTombstoneKey() { return Invalid - 1; }
+ static unsigned getHashValue(const unsigned &Key) { return Key; }
+ static bool isEqual(unsigned LHS, unsigned RHS) { return LHS == RHS; }
+ static bool isPod() { return true; }
+ };
+
+ typedef DenseMap<unsigned, std::string, KeyInfo> FlagsStringsMapType;
+ }
+
class TargetMachine;
class CallInst;
+ class GlobalValue;
+ class Type;
+ class Mangler;
+
+ class Section {
+ friend class TargetAsmInfo;
+ friend class StringMapEntry<Section>;
+
+ std::string Name;
+ unsigned Flags;
+
+ explicit Section(unsigned F = SectionFlags::Invalid):Flags(F) { }
+ public:
+ bool isNamed() const { return Flags & SectionFlags::Named; }
+ unsigned getEntitySize() const { return (Flags >> 24) & 0xFF; }
+
+ const std::string& getName() const { return Name; }
+ unsigned getFlags() const { return Flags; }
+ };
/// TargetAsmInfo - This class is intended to be used as a base class for asm
/// properties and features specific to the target.
class TargetAsmInfo {
+ private:
+ mutable StringMap<Section> Sections;
+ mutable SectionFlags::FlagsStringsMapType FlagsStrings;
protected:
//===------------------------------------------------------------------===//
// Properties to be set by the target writer, used to configure asm printer.
//
-
+
/// TextSection - Section directive for standard text.
///
- const char *TextSection; // Defaults to ".text".
-
+ const Section *TextSection; // Defaults to ".text".
+
/// DataSection - Section directive for standard data.
///
- const char *DataSection; // Defaults to ".data".
+ const Section *DataSection; // Defaults to ".data".
/// BSSSection - Section directive for uninitialized data. Null if this
/// target doesn't support a BSS section.
///
const char *BSSSection; // Default to ".bss".
+ const Section *BSSSection_;
+
+ /// ReadOnlySection - This is the directive that is emitted to switch to a
+ /// read-only section for constant data (e.g. data declared const,
+ /// jump tables).
+ const Section *ReadOnlySection; // Defaults to NULL
+
+ /// SmallDataSection - This is the directive that is emitted to switch to a
+ /// small data section.
+ ///
+ const Section *SmallDataSection; // Defaults to NULL
+
+ /// SmallBSSSection - This is the directive that is emitted to switch to a
+ /// small bss section.
+ ///
+ const Section *SmallBSSSection; // Defaults to NULL
+
+ /// SmallRODataSection - This is the directive that is emitted to switch to
+ /// a small read-only data section.
+ ///
+ const Section *SmallRODataSection; // Defaults to NULL
/// TLSDataSection - Section directive for Thread Local data.
///
- const char *TLSDataSection;// Defaults to ".section .tdata,"awT",@progbits".
+ const Section *TLSDataSection; // Defaults to ".tdata".
/// TLSBSSSection - Section directive for Thread Local uninitialized data.
/// Null if this target doesn't support a BSS section.
///
- const char *TLSBSSSection;// Default to ".section .tbss,"awT",@nobits".
+ const Section *TLSBSSSection; // Defaults to ".tbss".
+
/// ZeroFillDirective - Directive for emitting a global to the ZeroFill
/// section on this target. Null if this target doesn't support zerofill.
const char *ZeroFillDirective; // Default is null.
-
+
+ /// NonexecutableStackDirective - Directive for declaring to the
+ /// linker and beyond that the emitted code does not require stack
+ /// memory to be executable.
+ const char *NonexecutableStackDirective; // Default is null.
+
/// NeedsSet - True if target asm treats expressions in data directives
/// as linktime-relocatable. For assembly-time computation, we need to
/// use a .set. Thus:
const char *GlobalPrefix; // Defaults to ""
/// PrivateGlobalPrefix - This prefix is used for globals like constant
- /// pool entries that are completely private to the .o file and should not
+ /// pool entries that are completely private to the .s file and should not
/// have names in the .o file. This is often "." or "L".
const char *PrivateGlobalPrefix; // Defaults to "."
+ /// LessPrivateGlobalPrefix - This prefix is used for symbols that should
+ /// be passed through the assembler but be removed by the linker. This
+ /// is "l" on Darwin, currently used for some ObjC metadata.
+ const char *LessPrivateGlobalPrefix; // Defaults to ""
+
/// JumpTableSpecialLabelPrefix - If not null, a extra (dead) label is
/// emitted before jump tables with the specified prefix.
const char *JumpTableSpecialLabelPrefix; // Default to null.
/// AssemblerDialect - Which dialect of an assembler variant to use.
unsigned AssemblerDialect; // Defaults to 0
+ /// StringConstantPrefix - Prefix for FEs to use when generating unnamed
+ /// constant strings. These names get run through the Mangler later; if
+ /// you want the Mangler not to add the GlobalPrefix as well,
+ /// use '\1' as the first character.
+ const char *StringConstantPrefix; // Defaults to ".str"
+
//===--- Data Emission Directives -------------------------------------===//
/// ZeroDirective - this should be set to the directive used to get some
/// other null bytes) on this target. This is commonly supported as
/// ".cstring".
const char *CStringSection; // Defaults to NULL
+ const Section *CStringSection_;
/// StaticCtorsSection - This is the directive that is emitted to switch to
/// a section to emit the static constructor list.
/// Defaults to "\t.section .dtors,\"aw\",@progbits".
const char *StaticDtorsSection;
- /// FourByteConstantSection, EightByteConstantSection,
- /// SixteenByteConstantSection - These are special sections where we place
- /// 4-, 8-, and 16- byte constant literals.
- const char *FourByteConstantSection;
- const char *EightByteConstantSection;
- const char *SixteenByteConstantSection;
-
- /// ReadOnlySection - This is the directive that is emitted to switch to a
- /// read-only section for constant data (e.g. data declared const,
- /// jump tables).
- const char *ReadOnlySection; // Defaults to NULL
-
//===--- Global Variable Emission Directives --------------------------===//
/// GlobalDirective - This is the directive used to declare a global entity.
/// handle a weak_definition of constant 0 for an omitted EH frame.
bool SupportsWeakOmittedEHFrame; // Defaults to true.
- /// ShortenEHDataON64Bit - True if target exception table format requires
- /// 32-bit data in certain places even when targeting 64-bits.
- bool ShortenEHDataOn64Bit; // Defaults to false.
-
/// DwarfSectionOffsetDirective - Special section offset directive.
const char* DwarfSectionOffsetDirective; // Defaults to NULL
/// DwarfExceptionSection - Section directive for Exception table.
///
const char *DwarfExceptionSection; // Defaults to ".gcc_except_table".
-
//===--- CBE Asm Translation Table -----------------------------------===//
TargetAsmInfo();
virtual ~TargetAsmInfo();
+ const Section* getNamedSection(const char *Name,
+ unsigned Flags = SectionFlags::None,
+ bool Override = false) const;
+ const Section* getUnnamedSection(const char *Directive,
+ unsigned Flags = SectionFlags::None,
+ bool Override = false) const;
+
/// Measure the specified inline asm to determine an approximation of its
/// length.
virtual unsigned getInlineAsmLength(const char *Str) const;
return false;
}
+ /// emitUsedDirectiveFor - This hook allows targets to selectively decide
+ /// not to emit the UsedDirective for some symbols in llvm.used.
+ virtual bool emitUsedDirectiveFor(const GlobalValue *GV,
+ Mangler *Mang) const {
+ return (GV!=0);
+ }
+
/// PreferredEHDataFormat - This hook allows the target to select data
/// format used for encoding pointers in exception handling data. Reason is
/// 0 for data, 1 for code labels, 2 for function pointers. Global is true
/// if the symbol can be relocated.
virtual unsigned PreferredEHDataFormat(DwarfEncoding::Target Reason,
bool Global) const;
-
+
+ /// SectionKindForGlobal - This hook allows the target to select proper
+ /// section kind used for global emission.
+ virtual SectionKind::Kind
+ SectionKindForGlobal(const GlobalValue *GV) const;
+
+
+ /// SectionFlagsForGlobal - This hook allows the target to select proper
+ /// section flags either for given global or for section.
+ virtual unsigned
+ SectionFlagsForGlobal(const GlobalValue *GV = NULL,
+ const char* name = NULL) const;
+
+ /// SectionForGlobal - This hooks returns proper section name for given
+ /// global with all necessary flags and marks.
+ virtual const Section* SectionForGlobal(const GlobalValue *GV) const;
+
+ // Helper methods for SectionForGlobal
+ virtual std::string UniqueSectionForGlobal(const GlobalValue* GV,
+ SectionKind::Kind kind) const;
+
+ const std::string& getSectionFlags(unsigned Flags) const;
+ virtual std::string printSectionFlags(unsigned flags) const { return ""; }
+
+ virtual const Section* SelectSectionForGlobal(const GlobalValue *GV) const;
+
+ virtual const Section* SelectSectionForMachineConst(const Type *Ty) const;
+
+ /// getSLEB128Size - Compute the number of bytes required for a signed
+ /// leb128 value.
+
+ static unsigned getSLEB128Size(int Value);
+
+ /// getULEB128Size - Compute the number of bytes required for an unsigned
+ /// leb128 value.
+
+ static unsigned getULEB128Size(unsigned Value);
+
// Accessors.
//
- const char *getTextSection() const {
+ const Section *getTextSection() const {
return TextSection;
}
- const char *getDataSection() const {
+ const Section *getDataSection() const {
return DataSection;
}
const char *getBSSSection() const {
return BSSSection;
}
- const char *getTLSDataSection() const {
+ const Section *getBSSSection_() const {
+ return BSSSection_;
+ }
+ const Section *getReadOnlySection() const {
+ return ReadOnlySection;
+ }
+ const Section *getSmallDataSection() const {
+ return SmallDataSection;
+ }
+ const Section *getSmallBSSSection() const {
+ return SmallBSSSection;
+ }
+ const Section *getSmallRODataSection() const {
+ return SmallRODataSection;
+ }
+ const Section *getTLSDataSection() const {
return TLSDataSection;
}
- const char *getTLSBSSSection() const {
+ const Section *getTLSBSSSection() const {
return TLSBSSSection;
}
const char *getZeroFillDirective() const {
return ZeroFillDirective;
}
+ const char *getNonexecutableStackDirective() const {
+ return NonexecutableStackDirective;
+ }
bool needsSet() const {
return NeedsSet;
}
const char *getPrivateGlobalPrefix() const {
return PrivateGlobalPrefix;
}
+ const char *getLessPrivateGlobalPrefix() const {
+ return LessPrivateGlobalPrefix;
+ }
const char *getJumpTableSpecialLabelPrefix() const {
return JumpTableSpecialLabelPrefix;
}
unsigned getAssemblerDialect() const {
return AssemblerDialect;
}
+ const char *getStringConstantPrefix() const {
+ return StringConstantPrefix;
+ }
const char *getZeroDirective() const {
return ZeroDirective;
}
const char *getCStringSection() const {
return CStringSection;
}
+ const Section *getCStringSection_() const {
+ return CStringSection_;
+ }
const char *getStaticCtorsSection() const {
return StaticCtorsSection;
}
const char *getStaticDtorsSection() const {
return StaticDtorsSection;
}
- const char *getFourByteConstantSection() const {
- return FourByteConstantSection;
- }
- const char *getEightByteConstantSection() const {
- return EightByteConstantSection;
- }
- const char *getSixteenByteConstantSection() const {
- return SixteenByteConstantSection;
- }
- const char *getReadOnlySection() const {
- return ReadOnlySection;
- }
const char *getGlobalDirective() const {
return GlobalDirective;
}
bool getSupportsWeakOmittedEHFrame() const {
return SupportsWeakOmittedEHFrame;
}
- bool getShortenEHDataOn64Bit() const {
- return ShortenEHDataOn64Bit;
- }
const char *getDwarfSectionOffsetDirective() const {
return DwarfSectionOffsetDirective;
- }
+ }
const char *getDwarfAbbrevSection() const {
return DwarfAbbrevSection;
}
projects / oota-llvm.git / blobdiff