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Side by Side Diff: include/llvm/MC/MCAsmLayout.h

Issue 5119002: Reuse data fragments while lowering (Closed) Base URL: http://llvm.org/svn/llvm-project/llvm/trunk/
Patch Set: Created 10 years, 1 month ago
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1 //===- MCAsmLayout.h - Assembly Layout Object -------------------*- C++ -*-===// 1 //===- MCAsmLayout.h - Assembly Layout Object -------------------*- C++ -*-===//
2 // 2 //
3 // The LLVM Compiler Infrastructure 3 // The LLVM Compiler Infrastructure
4 // 4 //
5 // This file is distributed under the University of Illinois Open Source 5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details. 6 // License. See LICENSE.TXT for details.
7 // 7 //
8 //===----------------------------------------------------------------------===// 8 //===----------------------------------------------------------------------===//
9 9
10 #ifndef LLVM_MC_MCASMLAYOUT_H 10 #ifndef LLVM_MC_MCASMLAYOUT_H
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52 MCAsmLayout(MCAssembler &_Assembler); 52 MCAsmLayout(MCAssembler &_Assembler);
53 53
54 /// Get the assembler object this is a layout for. 54 /// Get the assembler object this is a layout for.
55 MCAssembler &getAssembler() const { return Assembler; } 55 MCAssembler &getAssembler() const { return Assembler; }
56 56
57 /// \brief Update the layout because a fragment has been resized. The 57 /// \brief Update the layout because a fragment has been resized. The
58 /// fragments size should have already been updated, the \arg SlideAmount is 58 /// fragments size should have already been updated, the \arg SlideAmount is
59 /// the delta from the old size. 59 /// the delta from the old size.
60 void UpdateForSlide(MCFragment *F, int SlideAmount); 60 void UpdateForSlide(MCFragment *F, int SlideAmount);
61 61
62 /// \brief Update the layout because a fragment has been replaced. 62 /// \brief Update the layout, replacing Src with Dst. The contents
63 void FragmentReplaced(MCFragment *Src, MCFragment *Dst); 63 /// of Src and Dst are not modified, and must be copied by the caller.
64 /// Src will be removed from the layout, but not deleted.
65 void ReplaceFragment(MCFragment *Src, MCFragment *Dst);
66
67 /// \brief Update the layout to coalesce Src into Dst. The contents
68 /// of Src and Dst are not modified, and must be coalesced by the caller.
69 /// Src will be removed from the layout, but not deleted.
70 void CoalesceFragments(MCFragment *Src, MCFragment *Dst);
64 71
65 /// \brief Perform a full layout. 72 /// \brief Perform a full layout.
66 void LayoutFile(); 73 void LayoutFile();
67 74
68 /// \brief Perform layout for a single fragment, assuming that the previous 75 /// \brief Perform layout for a single fragment, assuming that the previous
69 /// fragment has already been layed out correctly, and the parent section has 76 /// fragment has already been layed out correctly, and the parent section has
70 /// been initialized. 77 /// been initialized.
71 void LayoutFragment(MCFragment *Fragment); 78 void LayoutFragment(MCFragment *Fragment);
72 79
73 /// \brief Performs initial layout for a single section, assuming that the 80 /// \brief Performs initial layout for a single section, assuming that the
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126 /// \brief Get the address of the given symbol, as computed in the current 133 /// \brief Get the address of the given symbol, as computed in the current
127 /// layout. 134 /// layout.
128 uint64_t getSymbolAddress(const MCSymbolData *SD) const; 135 uint64_t getSymbolAddress(const MCSymbolData *SD) const;
129 136
130 /// @} 137 /// @}
131 }; 138 };
132 139
133 } // end namespace llvm 140 } // end namespace llvm
134 141
135 #endif 142 #endif
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