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LLVM
4.0.0
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Mass of a block. More...
#include <BlockFrequencyInfoImpl.h>
Public Member Functions | |
| BlockMass () | |
| BlockMass (uint64_t Mass) | |
| uint64_t | getMass () const |
| bool | isFull () const |
| bool | isEmpty () const |
| bool | operator! () const |
| BlockMass & | operator+= (BlockMass X) |
| Add another mass. More... | |
| BlockMass & | operator-= (BlockMass X) |
| Subtract another mass. More... | |
| BlockMass & | operator*= (BranchProbability P) |
| bool | operator== (BlockMass X) const |
| bool | operator!= (BlockMass X) const |
| bool | operator<= (BlockMass X) const |
| bool | operator>= (BlockMass X) const |
| bool | operator< (BlockMass X) const |
| bool | operator> (BlockMass X) const |
| ScaledNumber< uint64_t > | toScaled () const |
| Convert to scaled number. More... | |
| void | dump () const |
| raw_ostream & | print (raw_ostream &OS) const |
Static Public Member Functions | |
| static BlockMass | getEmpty () |
| static BlockMass | getFull () |
Mass of a block.
This class implements a sort of fixed-point fraction always between 0.0 and 1.0. getMass() == UINT64_MAX indicates a value of 1.0.
Masses can be added and subtracted. Simple saturation arithmetic is used, so arithmetic operations never overflow or underflow.
Masses can be multiplied. Multiplication treats full mass as 1.0 and uses an inexpensive floating-point algorithm that's off-by-one (almost, but not quite, maximum precision).
Masses can be scaled by BranchProbability at maximum precision.
Definition at line 71 of file BlockFrequencyInfoImpl.h.
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inline |
Definition at line 75 of file BlockFrequencyInfoImpl.h.
Referenced by getEmpty(), and getFull().
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inlineexplicit |
Definition at line 76 of file BlockFrequencyInfoImpl.h.
| LLVM_DUMP_METHOD void BlockMass::dump | ( | ) | const |
Definition at line 31 of file BlockFrequencyInfoImpl.cpp.
References llvm::dbgs(), and print().
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inlinestatic |
Definition at line 78 of file BlockFrequencyInfoImpl.h.
References BlockMass().
Referenced by llvm::bfi_detail::IrreducibleGraph::addNode(), and llvm::BlockFrequencyInfoImplBase::updateLoopWithIrreducible().
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inlinestatic |
Definition at line 79 of file BlockFrequencyInfoImpl.h.
References BlockMass().
Referenced by llvm::BlockFrequencyInfoImplBase::adjustLoopHeaderMass(), and llvm::BlockFrequencyInfoImplBase::computeLoopScale().
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inline |
Definition at line 81 of file BlockFrequencyInfoImpl.h.
Referenced by llvm::BlockFrequencyInfoImplBase::distributeMass(), and toScaled().
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inline |
Definition at line 84 of file BlockFrequencyInfoImpl.h.
Referenced by llvm::BlockFrequencyInfoImplBase::computeLoopScale(), and operator!().
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inline |
Definition at line 83 of file BlockFrequencyInfoImpl.h.
Referenced by toScaled().
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inline |
Definition at line 86 of file BlockFrequencyInfoImpl.h.
References isEmpty().
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inline |
Definition at line 113 of file BlockFrequencyInfoImpl.h.
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inline |
Definition at line 107 of file BlockFrequencyInfoImpl.h.
References llvm::BranchProbability::scale().
Add another mass.
Adds another mass, saturating at isFull() rather than overflowing.
Definition at line 91 of file BlockFrequencyInfoImpl.h.
Subtract another mass.
Subtracts another mass, saturating at isEmpty() rather than undeflowing.
Definition at line 101 of file BlockFrequencyInfoImpl.h.
Definition at line 116 of file BlockFrequencyInfoImpl.h.
Definition at line 114 of file BlockFrequencyInfoImpl.h.
Definition at line 112 of file BlockFrequencyInfoImpl.h.
Definition at line 117 of file BlockFrequencyInfoImpl.h.
Definition at line 115 of file BlockFrequencyInfoImpl.h.
| raw_ostream & BlockMass::print | ( | raw_ostream & | OS | ) | const |
Definition at line 40 of file BlockFrequencyInfoImpl.cpp.
References getHexDigit().
Referenced by dump(), and llvm::bfi_detail::operator<<().
| ScaledNumber< uint64_t > BlockMass::toScaled | ( | ) | const |
Convert to scaled number.
Convert to ScaledNumber. isFull() gives 1.0, while isEmpty() gives slightly above 0.0.
Definition at line 25 of file BlockFrequencyInfoImpl.cpp.
References getMass(), and isFull().
Referenced by llvm::BlockFrequencyInfoImplBase::computeLoopScale(), and llvm::BlockFrequencyInfoImplBase::unwrapLoops().
1.8.6