mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2024-12-30 02:32:08 +00:00
0cc8bd4861
- Still O(N^2), just a faster form, and now its the MCAsmLayout's fault. On the .s I am tuning against (combine.s from 403.gcc): -- ddunbar@lordcrumb:MC$ diff stats-before.txt stats-after.txt 5,10c5,10 < 1728 assembler - Number of assembler layout and relaxation steps < 7707 assembler - Number of emitted assembler fragments < 120588 assembler - Number of emitted object file bytes < 2233448 assembler - Number of evaluated fixups < 1727 assembler - Number of relaxed instructions < 6723845 mcexpr - Number of MCExpr evaluations --- > 3 assembler - Number of assembler layout and relaxation steps > 7707 assembler - Number of emitted assembler fragments > 120588 assembler - Number of emitted object file bytes > 14796 assembler - Number of evaluated fixups > 1727 assembler - Number of relaxed instructions > 67889 mcexpr - Number of MCExpr evaluations -- Feel free to LOL at the -before numbers, if you like. I am a little surprised we make more than 2 relaxation passes. It's pretty trivial for us to do relaxation out-of-order if that would give a speedup. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@99543 91177308-0d34-0410-b5e6-96231b3b80d8
98 lines
3.2 KiB
C++
98 lines
3.2 KiB
C++
//===- MCAsmLayout.h - Assembly Layout Object -------------------*- C++ -*-===//
|
|
//
|
|
// The LLVM Compiler Infrastructure
|
|
//
|
|
// This file is distributed under the University of Illinois Open Source
|
|
// License. See LICENSE.TXT for details.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#ifndef LLVM_MC_MCASMLAYOUT_H
|
|
#define LLVM_MC_MCASMLAYOUT_H
|
|
|
|
namespace llvm {
|
|
class MCAssembler;
|
|
class MCFragment;
|
|
class MCSectionData;
|
|
class MCSymbolData;
|
|
|
|
/// Encapsulates the layout of an assembly file at a particular point in time.
|
|
///
|
|
/// Assembly may requiring compute multiple layouts for a particular assembly
|
|
/// file as part of the relaxation process. This class encapsulates the layout
|
|
/// at a single point in time in such a way that it is always possible to
|
|
/// efficiently compute the exact addresses of any symbol in the assembly file,
|
|
/// even during the relaxation process.
|
|
class MCAsmLayout {
|
|
private:
|
|
MCAssembler &Assembler;
|
|
|
|
public:
|
|
MCAsmLayout(MCAssembler &_Assembler) : Assembler(_Assembler) {}
|
|
|
|
/// Get the assembler object this is a layout for.
|
|
MCAssembler &getAssembler() const { return Assembler; }
|
|
|
|
/// \brief Update the layout because a fragment has been resized. The
|
|
/// fragments size should have already been updated, the \arg SlideAmount is
|
|
/// the delta from the old size.
|
|
void UpdateForSlide(MCFragment *F, int SlideAmount);
|
|
|
|
/// @name Fragment Layout Data
|
|
/// @{
|
|
|
|
/// \brief Get the effective size of the given fragment, as computed in the
|
|
/// current layout.
|
|
uint64_t getFragmentEffectiveSize(const MCFragment *F) const;
|
|
|
|
/// \brief Set the effective size of the given fragment.
|
|
void setFragmentEffectiveSize(MCFragment *F, uint64_t Value);
|
|
|
|
/// \brief Get the offset of the given fragment inside its containing section.
|
|
uint64_t getFragmentOffset(const MCFragment *F) const;
|
|
|
|
/// \brief Set the offset of the given fragment inside its containing section.
|
|
void setFragmentOffset(MCFragment *F, uint64_t Value);
|
|
|
|
/// @}
|
|
/// @name Section Layout Data
|
|
/// @{
|
|
|
|
/// \brief Get the computed address of the given section.
|
|
uint64_t getSectionAddress(const MCSectionData *SD) const;
|
|
|
|
/// \brief Set the computed address of the given section.
|
|
void setSectionAddress(MCSectionData *SD, uint64_t Value);
|
|
|
|
/// \brief Get the data size of the given section, as emitted to the object
|
|
/// file. This may include additional padding, or be 0 for virtual sections.
|
|
uint64_t getSectionFileSize(const MCSectionData *SD) const;
|
|
|
|
/// \brief Set the data size of the given section.
|
|
void setSectionFileSize(MCSectionData *SD, uint64_t Value);
|
|
|
|
/// \brief Get the actual data size of the given section.
|
|
uint64_t getSectionSize(const MCSectionData *SD) const;
|
|
|
|
/// \brief Set the actual data size of the given section.
|
|
void setSectionSize(MCSectionData *SD, uint64_t Value);
|
|
|
|
/// @}
|
|
/// @name Utility Functions
|
|
/// @{
|
|
|
|
/// \brief Get the address of the given fragment, as computed in the current
|
|
/// layout.
|
|
uint64_t getFragmentAddress(const MCFragment *F) const;
|
|
|
|
/// \brief Get the address of the given symbol, as computed in the current
|
|
/// layout.
|
|
uint64_t getSymbolAddress(const MCSymbolData *SD) const;
|
|
|
|
/// @}
|
|
};
|
|
|
|
} // end namespace llvm
|
|
|
|
#endif
|