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Comment and adjust style in the newly introduced MCBoundaryAlignFragment infrastructure. More to follow.

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This commit is contained in:
Philip Reames 2019-12-20 11:48:30 -08:00
parent e0244827fe
commit 1f8262a87a
2 changed files with 17 additions and 16 deletions
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3
include/llvm/MC/MCAsmBackend.h
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@ -46,6 +46,9 @@ public:
const support::endianness Endian;
/// Give the target a chance to manipulate state related to instruction
/// alignment (e.g. padding for optimization) before and after actually
/// emitting the instruction.
virtual void alignBranchesBegin(MCObjectStreamer &OS, const MCInst &Inst) {}
virtual void alignBranchesEnd(MCObjectStreamer &OS, const MCInst &Inst) {}

22
include/llvm/MC/MCFragment.h
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@ -565,15 +565,18 @@ public:
}
};
/// Represents required padding such that a particular other set of fragments
/// does not cross a particular power-of-two boundary. The other fragments must
/// follow this one within the same section.
class MCBoundaryAlignFragment : public MCFragment {
private:
/// The size of the MCBoundaryAlignFragment.
/// Note: The size is lazily set during relaxation, and is not meaningful
/// before that.
/// The size of the fragment. The size is lazily set during relaxation, and
/// is not meaningful before that.
uint64_t Size = 0;
/// The alignment requirement of the branch to be aligned.
Align AlignBoundary;
/// Flag to indicate whether the branch is fused.
/// Flag to indicate whether the branch is fused. Use in determining the
/// region of fragments being aligned.
bool Fused : 1;
/// Flag to indicate whether NOPs should be emitted.
bool EmitNops : 1;
@ -586,21 +589,16 @@ public:
/// \name Accessors
/// @{
uint64_t getSize() const { return Size; }
void setSize(uint64_t Value) { Size = Value; }
Align getAlignment() const { return AlignBoundary; }
uint64_t getSize() const { return Size; }
bool canEmitNops() const { return EmitNops; }
bool isFused() const { return Fused; }
void setFused(bool Value) { Fused = Value; }
bool canEmitNops() const { return EmitNops; }
void setEmitNops(bool Value) { EmitNops = Value; }
void setSize(uint64_t Value) { Size = Value; }
/// @}
//