1.7.6.1Copyright © 2003-2014 University of Illinois at Urbana-Champaign. All Rights Reserved.
LLVM API Documentation
#include <MachineTraceMetrics.h>
Public Member Functions | |
| Trace (Ensemble &te, TraceBlockInfo &tbi) | |
| void | print (raw_ostream &) const |
| unsigned | getInstrCount () const |
| Compute the total number of instructions in the trace. | |
| unsigned | getResourceDepth (bool Bottom) const |
| When bottom is set include instructions in current block in estimate. | |
| unsigned | getResourceLength (ArrayRef< const MachineBasicBlock * > Extrablocks=None, ArrayRef< const MCSchedClassDesc * > ExtraInstrs=None, ArrayRef< const MCSchedClassDesc * > RemoveInstrs=None) const |
| unsigned | getCriticalPath () const |
| InstrCycles | getInstrCycles (const MachineInstr *MI) const |
| unsigned | getInstrSlack (const MachineInstr *MI) const |
| unsigned | getPHIDepth (const MachineInstr *PHI) const |
| bool | isDepInTrace (const MachineInstr *DefMI, const MachineInstr *UseMI) const |
A trace represents a plausible sequence of executed basic blocks that passes through the current basic block one. The Trace class serves as a handle to internal cached data structures.
Definition at line 236 of file MachineTraceMetrics.h.
| llvm::MachineTraceMetrics::Trace::Trace | ( | Ensemble & | te, |
| TraceBlockInfo & | tbi | ||
| ) | [inline, explicit] |
Definition at line 243 of file MachineTraceMetrics.h.
| unsigned llvm::MachineTraceMetrics::Trace::getCriticalPath | ( | ) | const [inline] |
Return the length of the (data dependency) critical path through the trace.
Definition at line 273 of file MachineTraceMetrics.h.
References llvm::MachineTraceMetrics::TraceBlockInfo::CriticalPath.
| unsigned llvm::MachineTraceMetrics::Trace::getInstrCount | ( | ) | const [inline] |
Compute the total number of instructions in the trace.
Definition at line 247 of file MachineTraceMetrics.h.
References llvm::MachineTraceMetrics::TraceBlockInfo::InstrDepth, and llvm::MachineTraceMetrics::TraceBlockInfo::InstrHeight.
| InstrCycles llvm::MachineTraceMetrics::Trace::getInstrCycles | ( | const MachineInstr * | MI | ) | const [inline] |
Return the depth and height of MI. The depth is only valid for instructions in or above the trace center block. The height is only valid for instructions in or below the trace center block.
Definition at line 278 of file MachineTraceMetrics.h.
References llvm::DenseMapBase< DerivedT, KeyT, ValueT, KeyInfoT >::lookup().
| unsigned MachineTraceMetrics::Trace::getInstrSlack | ( | const MachineInstr * | MI | ) | const |
Return the slack of MI. This is the number of cycles MI can be delayed before the critical path becomes longer. MI must be an instruction in the trace center block.
Definition at line 1146 of file MachineTraceMetrics.cpp.
References llvm::MachineTraceMetrics::InstrCycles::Depth, getBlockNum(), llvm::MachineBasicBlock::getNumber(), llvm::MachineInstr::getParent(), and llvm::MachineTraceMetrics::InstrCycles::Height.
| unsigned MachineTraceMetrics::Trace::getPHIDepth | ( | const MachineInstr * | PHI | ) | const |
Return the Depth of a PHI instruction in a trace center block successor. The PHI does not have to be part of the trace.
Definition at line 1155 of file MachineTraceMetrics.cpp.
References llvm::SmallVectorTemplateCommon< T >::front(), getBlockNum(), getPHIDeps(), and llvm::SmallVectorTemplateCommon< T >::size().
| unsigned MachineTraceMetrics::Trace::getResourceDepth | ( | bool | Bottom | ) | const |
When bottom is set include instructions in current block in estimate.
Return the resource depth of the top/bottom of the trace center block. This is the number of cycles required to execute all instructions from the trace head to the trace center block. The resource depth only considers execution resources, it ignores data dependencies. When Bottom is set, instructions in the trace center block are included.
All instructions before current block
Definition at line 1170 of file MachineTraceMetrics.cpp.
References getBlockNum(), and llvm::ArrayRef< T >::size().
| unsigned MachineTraceMetrics::Trace::getResourceLength | ( | ArrayRef< const MachineBasicBlock * > | Extrablocks = None, |
| ArrayRef< const MCSchedClassDesc * > | ExtraInstrs = None, |
||
| ArrayRef< const MCSchedClassDesc * > | RemoveInstrs = None |
||
| ) | const |
Return the resource length of the trace. This is the number of cycles required to execute the instructions in the trace if they were all independent, exposing the maximum instruction-level parallelism.
Any blocks in Extrablocks are included as if they were part of the trace. Likewise, extra resources required by the specified scheduling classes are included. For the caller to account for extra machine instructions, it must first resolve each instruction's scheduling class.
Definition at line 1197 of file MachineTraceMetrics.cpp.
References getBlockNum(), I, llvm::MCSchedClassDesc::isValid(), llvm::PPCISD::SC, and llvm::ArrayRef< T >::size().
| bool MachineTraceMetrics::Trace::isDepInTrace | ( | const MachineInstr * | DefMI, |
| const MachineInstr * | UseMI | ||
| ) | const |
A dependence is useful if the basic block of the defining instruction is part of the trace of the user instruction. It is assumed that DefMI dominates UseMI (see also isUsefulDominator).
Definition at line 1252 of file MachineTraceMetrics.cpp.
References llvm::MachineBasicBlock::getNumber(), llvm::MachineInstr::getParent(), and llvm::MachineTraceMetrics::TraceBlockInfo::isUsefulDominator().
| void MachineTraceMetrics::Trace::print | ( | raw_ostream & | OS | ) | const |
Definition at line 1300 of file MachineTraceMetrics.cpp.
References llvm::MachineBasicBlock::getNumber(), llvm::MachineTraceMetrics::TraceBlockInfo::hasValidDepth(), llvm::MachineTraceMetrics::TraceBlockInfo::hasValidHeight(), llvm::MachineTraceMetrics::TraceBlockInfo::Pred, and llvm::MachineTraceMetrics::TraceBlockInfo::Succ.
Referenced by llvm::operator<<().
Generated on Thu Sep 18 2014 04:06:36 for LLVM by
1.7.6.1
Copyright © 2003-2014 University of Illinois at Urbana-Champaign.
All Rights Reserved.