Utility to calculate the size and a few similar metrics for a set of basic blocks. More...
#include "llvm/Analysis/CodeMetrics.h"
Public Member Functions | |
| LLVM_ABI void | analyzeBasicBlock (const BasicBlock *BB, const TargetTransformInfo &TTI, const SmallPtrSetImpl< const Value * > &EphValues, bool PrepareForLTO=false, const Loop *L=nullptr) |
| Add information about a block to the current state. | |
Static Public Member Functions | |
| static LLVM_ABI void | collectEphemeralValues (const Loop *L, AssumptionCache *AC, SmallPtrSetImpl< const Value * > &EphValues) |
| Collect a loop's ephemeral values (those used only by an assume or similar intrinsics in the loop). | |
| static LLVM_ABI void | collectEphemeralValues (const Function *L, AssumptionCache *AC, SmallPtrSetImpl< const Value * > &EphValues) |
| Collect a functions's ephemeral values (those used only by an assume or similar intrinsics in the function). | |
Public Attributes | |
| bool | isRecursive = false |
| True if this function calls itself. | |
| bool | notDuplicatable = false |
| True if this function cannot be duplicated. | |
| bool | usesDynamicAlloca = false |
| True if this function calls alloca (in the C sense). | |
| ConvergenceKind | Convergence = ConvergenceKind::None |
| The kind of convergence specified in this function. | |
| InstructionCost | NumInsts = 0 |
| Code size cost of the analyzed blocks. | |
| SmallVector< InstructionCost, 0 > | NumBBInsts |
| Keeps track of basic block code size estimates. Indexed by block number. | |
| unsigned | NumInlineCandidates = 0 |
| The number of calls to internal functions with a single caller. | |
| unsigned | NumVectorInsts = 0 |
| How many instructions produce vector values. | |
| unsigned | NumRets = 0 |
| How many 'ret' instructions the blocks contain. | |
Detailed Description
Utility to calculate the size and a few similar metrics for a set of basic blocks.
Definition at line 34 of file CodeMetrics.h.
Member Function Documentation
◆ analyzeBasicBlock()
| void CodeMetrics::analyzeBasicBlock | ( | const BasicBlock * | BB, |
| const TargetTransformInfo & | TTI, | ||
| const SmallPtrSetImpl< const Value * > & | EphValues, | ||
| bool | PrepareForLTO = false, | ||
| const Loop * | L = nullptr ) |
Add information about a block to the current state.
Fill in the current structure with information gleaned from the specified block.
Definition at line 129 of file CodeMetrics.cpp.
References assert(), Call, llvm::Controlled, Convergence, llvm::SmallPtrSetImpl< PtrType >::count(), llvm::dbgs(), llvm::dyn_cast(), llvm::ExtendedLoop, extendsConvergenceOutsideLoop(), F, llvm::Function::getMaxBlockNumber(), llvm::BasicBlock::getNumber(), llvm::BasicBlock::getParent(), llvm::BasicBlock::getTerminator(), I, llvm::isa(), isRecursive, LLVM_DEBUG, llvm::None, notDuplicatable, NumBBInsts, NumInlineCandidates, NumInsts, NumRets, NumVectorInsts, llvm::TargetTransformInfo::TCK_CodeSize, llvm::Uncontrolled, and usesDynamicAlloca.
◆ collectEphemeralValues() [1/2]
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static |
Collect a functions's ephemeral values (those used only by an assume or similar intrinsics in the function).
Definition at line 95 of file CodeMetrics.cpp.
References appendSpeculatableOperands(), assert(), llvm::AssumptionCache::assumptions(), llvm::cast(), completeEphemeralValues(), F, I, and llvm::SmallPtrSetImpl< PtrType >::insert().
◆ collectEphemeralValues() [2/2]
|
static |
Collect a loop's ephemeral values (those used only by an assume or similar intrinsics in the loop).
Definition at line 71 of file CodeMetrics.cpp.
References appendSpeculatableOperands(), llvm::AssumptionCache::assumptions(), llvm::cast(), completeEphemeralValues(), I, and llvm::SmallPtrSetImpl< PtrType >::insert().
Referenced by slpvectorizer::BoUpSLP::BoUpSLP(), llvm::LoopVectorizationCostModel::collectValuesToIgnore(), computeHeuristicUnrollFactor(), findBestNonTrivialUnswitchCandidate(), llvm::PPCTTIImpl::isHardwareLoopProfitable(), llvm::IVUsers::IVUsers(), llvm::FunctionSpecializer::run(), tryToUnrollAndJamLoop(), and tryToUnrollLoop().
Member Data Documentation
◆ Convergence
| ConvergenceKind llvm::CodeMetrics::Convergence = ConvergenceKind::None |
The kind of convergence specified in this function.
Definition at line 48 of file CodeMetrics.h.
Referenced by analyzeBasicBlock().
◆ isRecursive
| bool llvm::CodeMetrics::isRecursive = false |
True if this function calls itself.
Definition at line 36 of file CodeMetrics.h.
Referenced by analyzeBasicBlock().
◆ notDuplicatable
| bool llvm::CodeMetrics::notDuplicatable = false |
True if this function cannot be duplicated.
True if this function contains one or more indirect branches, or it contains one or more 'noduplicate' instructions.
Definition at line 42 of file CodeMetrics.h.
Referenced by analyzeBasicBlock().
◆ NumBBInsts
| SmallVector<InstructionCost, 0> llvm::CodeMetrics::NumBBInsts |
Keeps track of basic block code size estimates. Indexed by block number.
Definition at line 54 of file CodeMetrics.h.
Referenced by analyzeBasicBlock().
◆ NumInlineCandidates
| unsigned llvm::CodeMetrics::NumInlineCandidates = 0 |
The number of calls to internal functions with a single caller.
These are likely targets for future inlining, likely exposed by interleaved devirtualization.
Definition at line 60 of file CodeMetrics.h.
Referenced by analyzeBasicBlock().
◆ NumInsts
| InstructionCost llvm::CodeMetrics::NumInsts = 0 |
Code size cost of the analyzed blocks.
Definition at line 51 of file CodeMetrics.h.
Referenced by analyzeBasicBlock().
◆ NumRets
| unsigned llvm::CodeMetrics::NumRets = 0 |
How many 'ret' instructions the blocks contain.
Definition at line 68 of file CodeMetrics.h.
Referenced by analyzeBasicBlock().
◆ NumVectorInsts
| unsigned llvm::CodeMetrics::NumVectorInsts = 0 |
How many instructions produce vector values.
The inliner is more aggressive with inlining vector kernels.
Definition at line 65 of file CodeMetrics.h.
Referenced by analyzeBasicBlock().
◆ usesDynamicAlloca
| bool llvm::CodeMetrics::usesDynamicAlloca = false |
True if this function calls alloca (in the C sense).
Definition at line 45 of file CodeMetrics.h.
Referenced by analyzeBasicBlock().
The documentation for this struct was generated from the following files:
- include/llvm/Analysis/CodeMetrics.h
- lib/Analysis/CodeMetrics.cpp
Generated on for LLVM by
1.14.0