MCAssembler.cpp File Reference

#include "llvm/MC/MCAssembler.h"
#include "llvm/ADT/ArrayRef.h"
#include "llvm/ADT/SmallString.h"
#include "llvm/ADT/SmallVector.h"
#include "llvm/ADT/Statistic.h"
#include "llvm/ADT/StringRef.h"
#include "llvm/ADT/Twine.h"
#include "llvm/MC/MCAsmBackend.h"
#include "llvm/MC/MCAsmInfo.h"
#include "llvm/MC/MCCodeEmitter.h"
#include "llvm/MC/MCCodeView.h"
#include "llvm/MC/MCContext.h"
#include "llvm/MC/MCDwarf.h"
#include "llvm/MC/MCExpr.h"
#include "llvm/MC/MCFixup.h"
#include "llvm/MC/MCFixupKindInfo.h"
#include "llvm/MC/MCFragment.h"
#include "llvm/MC/MCInst.h"
#include "llvm/MC/MCObjectWriter.h"
#include "llvm/MC/MCSection.h"
#include "llvm/MC/MCSymbol.h"
#include "llvm/MC/MCValue.h"
#include "llvm/Support/Alignment.h"
#include "llvm/Support/Casting.h"
#include "llvm/Support/Debug.h"
#include "llvm/Support/EndianStream.h"
#include "llvm/Support/ErrorHandling.h"
#include "llvm/Support/LEB128.h"
#include "llvm/Support/raw_ostream.h"
#include <cassert>
#include <cstdint>
#include <tuple>
#include <utility>

Go to the source code of this file.

Namespaces
namespace	llvm
	This is an optimization pass for GlobalISel generic memory operations.
namespace	stats

Macros
#define	DEBUG_TYPE   "assembler"

Functions
static uint64_t	computeBundlePadding (unsigned BundleSize, const MCEncodedFragment *F, uint64_t FOffset, uint64_t FSize)
static bool	getLabelOffset (const MCAssembler &Asm, const MCSymbol &S, bool ReportError, uint64_t &Val)
static bool	getSymbolOffsetImpl (const MCAssembler &Asm, const MCSymbol &S, bool ReportError, uint64_t &Val)
static void	writeFragment (raw_ostream &OS, const MCAssembler &Asm, const MCFragment &F)
	Write the fragment F to the output file.
static bool	mayCrossBoundary (uint64_t StartAddr, uint64_t Size, Align BoundaryAlignment)
	Check if the branch crosses the boundary.
static bool	isAgainstBoundary (uint64_t StartAddr, uint64_t Size, Align BoundaryAlignment)
	Check if the branch is against the boundary.
static bool	needPadding (uint64_t StartAddr, uint64_t Size, Align BoundaryAlignment)
	Check if the branch needs padding.

Macro Definition Documentation

DEBUG_TYPE

#define DEBUG_TYPE   "assembler"

Definition at line 49 of file MCAssembler.cpp.

Function Documentation

computeBundlePadding()

static uint64_t computeBundlePadding ( unsigned  BundleSize, const MCEncodedFragment *  F, uint64_t  FOffset, uint64_t  FSize  )

static

Definition at line 346 of file MCAssembler.cpp.

References F.

Referenced by llvm::MCAssembler::layoutBundle().

getLabelOffset()

static bool getLabelOffset ( const MCAssembler &  Asm, const MCSymbol &  S, bool  ReportError, uint64_t &  Val  )

static

Definition at line 447 of file MCAssembler.cpp.

References llvm::MCSymbol::getFragment(), llvm::MCSymbol::getName(), llvm::MCSymbol::getOffset(), and llvm::report_fatal_error().

Referenced by getSymbolOffsetImpl().

getSymbolOffsetImpl()

static bool getSymbolOffsetImpl ( const MCAssembler &  Asm, const MCSymbol &  S, bool  ReportError, uint64_t &  Val  )

static

Definition at line 459 of file MCAssembler.cpp.

References A, B, llvm::MCExpr::evaluateAsValue(), getLabelOffset(), llvm::MCSymbol::getName(), getSymbolOffsetImpl(), llvm::MCSymbol::getVariableValue(), llvm::MCSymbol::isVariable(), llvm::Offset, and llvm::report_fatal_error().

Referenced by llvm::MCAssembler::getSymbolOffset(), and getSymbolOffsetImpl().

isAgainstBoundary()

static bool isAgainstBoundary ( uint64_t  StartAddr, uint64_t  Size, Align  BoundaryAlignment  )

static

Check if the branch is against the boundary.

Parameters

StartAddr	start address of the fused/unfused branch.
Size	size of the fused/unfused branch.
BoundaryAlignment	alignment requirement of the branch.

Returns

true if the branch is against the boundary.

Definition at line 1152 of file MCAssembler.cpp.

References Size, and llvm::Align::value().

Referenced by needPadding().

mayCrossBoundary()

static bool mayCrossBoundary ( uint64_t  StartAddr, uint64_t  Size, Align  BoundaryAlignment  )

static

Check if the branch crosses the boundary.

Parameters

StartAddr	start address of the fused/unfused branch.
Size	size of the fused/unfused branch.
BoundaryAlignment	alignment requirement of the branch.

Returns

true if the branch cross the boundary.

Definition at line 1139 of file MCAssembler.cpp.

References llvm::Log2(), and Size.

Referenced by needPadding().

needPadding()

static bool needPadding ( uint64_t  StartAddr, uint64_t  Size, Align  BoundaryAlignment  )

static

Check if the branch needs padding.

Parameters

StartAddr	start address of the fused/unfused branch.
Size	size of the fused/unfused branch.
BoundaryAlignment	alignment requirement of the branch.

Returns

true if the branch needs padding.

Definition at line 1164 of file MCAssembler.cpp.

References isAgainstBoundary(), mayCrossBoundary(), and Size.

writeFragment()

static void writeFragment ( raw_ostream &  OS, const MCAssembler &  Asm, const MCFragment &  F  )

static

Write the fragment F to the output file.

Definition at line 602 of file MCAssembler.cpp.

References assert(), llvm::Data, Endian, F, llvm::MCFragment::FT_Align, llvm::MCFragment::FT_BoundaryAlign, llvm::MCFragment::FT_CVDefRange, llvm::MCFragment::FT_CVInlineLines, llvm::MCFragment::FT_Data, llvm::MCFragment::FT_Dummy, llvm::MCFragment::FT_Dwarf, llvm::MCFragment::FT_DwarfFrame, llvm::MCFragment::FT_Fill, llvm::MCFragment::FT_LEB, llvm::MCFragment::FT_Nops, llvm::MCFragment::FT_Org, llvm::MCFragment::FT_PseudoProbe, llvm::MCFragment::FT_Relaxable, llvm::MCFragment::FT_SymbolId, llvm::MCEncodedFragmentWithFixups< ContentsSize, FixupsSize >::getContents(), llvm::MCNopsFragment::getControlledNopLength(), llvm::MCSymbol::getIndex(), llvm::MCNopsFragment::getLoc(), llvm::MCNopsFragment::getNumBytes(), llvm::MCAlignFragment::getSubtargetInfo(), llvm::MCNopsFragment::getSubtargetInfo(), llvm::MCBoundaryAlignFragment::getSubtargetInfo(), llvm::MCSymbolIdFragment::getSymbol(), llvm::MCAlignFragment::getValue(), llvm::MCFillFragment::getValue(), llvm::MCOrgFragment::getValue(), llvm::MCAlignFragment::getValueSize(), llvm::MCFillFragment::getValueSize(), llvm::MCAlignFragment::hasEmitNops(), I, llvm::little, llvm_unreachable, OS, llvm::Ref, llvm::report_fatal_error(), llvm::raw_ostream::tell(), and llvm::raw_ostream::write().

Referenced by llvm::MCAssembler::writeSectionData().