llvm::SplitAnalysis::BlockInfo Struct Reference

#include <SplitKit.h>

Collaboration diagram for llvm::SplitAnalysis::BlockInfo:

Public Member Functions
bool	isOneInstr () const

Public Attributes
MachineBasicBlock *	MBB
SlotIndex	FirstInstr
	First instr accessing current reg. More...
SlotIndex	LastInstr
	Last instr accessing current reg. More...
SlotIndex	FirstDef
	First non-phi valno->def, or SlotIndex(). More...
bool	LiveIn
	Current reg is live in. More...
bool	LiveOut
	Current reg is live out. More...

Detailed Description

Additional information about basic blocks where the current variable is live. Such a block will look like one of these templates:

1. | o—x | Internal to block. Variable is only live in this block.
2. |—x | Live-in, kill.
3. | o—| Def, live-out.
4. |—x o—| Live-in, kill, def, live-out. Counted by NumGapBlocks.
5. |—o—o—| Live-through with uses or defs.
6. |--------—| Live-through without uses. Counted by NumThroughBlocks.

Two BlockInfo entries are created for template 4. One for the live-in segment, and one for the live-out segment. These entries look as if the block were split in the middle where the live range isn't live.

Live-through blocks without any uses don't get BlockInfo entries. They are simply listed in ThroughBlocks instead.

Definition at line 67 of file SplitKit.h.

Member Function Documentation

bool llvm::SplitAnalysis::BlockInfo::isOneInstr ( ) const

inline

isOneInstr - Returns true when this BlockInfo describes a single instruction.

Definition at line 77 of file SplitKit.h.

References FirstInstr, llvm::SlotIndex::isSameInstr(), and LastInstr.

Referenced by llvm::SplitAnalysis::shouldSplitSingleBlock().

Member Data Documentation

SlotIndex llvm::SplitAnalysis::BlockInfo::FirstDef

First non-phi valno->def, or SlotIndex().

Definition at line 71 of file SplitKit.h.

SlotIndex llvm::SplitAnalysis::BlockInfo::FirstInstr

First instr accessing current reg.

Definition at line 69 of file SplitKit.h.

Referenced by isOneInstr(), llvm::SplitAnalysis::shouldSplitSingleBlock(), llvm::SplitEditor::splitRegInBlock(), llvm::SplitEditor::splitRegOutBlock(), and llvm::SplitEditor::splitSingleBlock().

SlotIndex llvm::SplitAnalysis::BlockInfo::LastInstr

Last instr accessing current reg.

Definition at line 70 of file SplitKit.h.

Referenced by isOneInstr(), llvm::SplitEditor::splitRegInBlock(), llvm::SplitEditor::splitRegOutBlock(), and llvm::SplitEditor::splitSingleBlock().

bool llvm::SplitAnalysis::BlockInfo::LiveIn

Current reg is live in.

Definition at line 72 of file SplitKit.h.

Referenced by llvm::SplitAnalysis::shouldSplitSingleBlock(), llvm::SplitEditor::splitRegInBlock(), and llvm::SplitEditor::splitRegOutBlock().

bool llvm::SplitAnalysis::BlockInfo::LiveOut

Current reg is live out.

Definition at line 73 of file SplitKit.h.

Referenced by llvm::SplitAnalysis::shouldSplitSingleBlock(), llvm::SplitEditor::splitRegInBlock(), llvm::SplitEditor::splitRegOutBlock(), and llvm::SplitEditor::splitSingleBlock().

MachineBasicBlock* llvm::SplitAnalysis::BlockInfo::MBB

Definition at line 68 of file SplitKit.h.

Referenced by llvm::SplitEditor::splitRegInBlock(), llvm::SplitEditor::splitRegOutBlock(), and llvm::SplitEditor::splitSingleBlock().

---

The documentation for this struct was generated from the following file:

• SplitKit.h