LLVM 20.0.0git
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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 | |
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 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 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 | exposesReturnsTwice = false |
True if this function contains a call to setjmp or other functions with attribute "returns twice" without having the attribute itself. | |
bool | isRecursive = false |
True if this function calls itself. | |
bool | notDuplicatable = false |
True if this function cannot be duplicated. | |
ConvergenceKind | Convergence = ConvergenceKind::None |
The kind of convergence specified in this function. | |
bool | usesDynamicAlloca = false |
True if this function calls alloca (in the C sense). | |
InstructionCost | NumInsts = 0 |
Code size cost of the analyzed blocks. | |
unsigned | NumBlocks = false |
Number of analyzed blocks. | |
DenseMap< const BasicBlock *, InstructionCost > | NumBBInsts |
Keeps track of basic block code size estimates. | |
unsigned | NumCalls = false |
Keep track of the number of calls to 'big' functions. | |
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. | |
Utility to calculate the size and a few similar metrics for a set of basic blocks.
Definition at line 34 of file CodeMetrics.h.
void CodeMetrics::analyzeBasicBlock | ( | const BasicBlock * | BB, |
const TargetTransformInfo & | TTI, | ||
const SmallPtrSetImpl< const Value * > & | EphValues, | ||
bool | PrepareForLTO = false , |
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const Loop * | L = nullptr |
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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(), llvm::Controlled, Convergence, llvm::SmallPtrSetImpl< PtrType >::count(), llvm::dbgs(), llvm::ExtendedLoop, extendsConvergenceOutsideLoop(), F, llvm::TargetTransformInfo::getInstructionCost(), llvm::BasicBlock::getParent(), llvm::BasicBlock::getTerminator(), I, llvm::TargetTransformInfo::isLoweredToCall(), isRecursive, LLVM_DEBUG, llvm::None, notDuplicatable, NumBBInsts, NumBlocks, NumCalls, NumInlineCandidates, NumInsts, NumRets, NumVectorInsts, llvm::TargetTransformInfo::TCK_CodeSize, llvm::Uncontrolled, and usesDynamicAlloca.
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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(), completeEphemeralValues(), F, I, and llvm::SmallPtrSetImpl< PtrType >::insert().
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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(), completeEphemeralValues(), I, and llvm::SmallPtrSetImpl< PtrType >::insert().
Referenced by llvm::slpvectorizer::BoUpSLP::BoUpSLP(), llvm::LoopVectorizationCostModel::collectValuesToIgnore(), computeHeuristicUnrollFactor(), findBestNonTrivialUnswitchCandidate(), llvm::PPCTTIImpl::isHardwareLoopProfitable(), llvm::IVUsers::IVUsers(), llvm::FunctionSpecializer::run(), tryToUnrollAndJamLoop(), and tryToUnrollLoop().
ConvergenceKind llvm::CodeMetrics::Convergence = ConvergenceKind::None |
The kind of convergence specified in this function.
Definition at line 49 of file CodeMetrics.h.
Referenced by analyzeBasicBlock().
bool llvm::CodeMetrics::exposesReturnsTwice = false |
True if this function contains a call to setjmp or other functions with attribute "returns twice" without having the attribute itself.
Definition at line 37 of file CodeMetrics.h.
bool llvm::CodeMetrics::isRecursive = false |
True if this function calls itself.
Definition at line 40 of file CodeMetrics.h.
Referenced by analyzeBasicBlock().
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 46 of file CodeMetrics.h.
Referenced by analyzeBasicBlock().
DenseMap<const BasicBlock *, InstructionCost> llvm::CodeMetrics::NumBBInsts |
Keeps track of basic block code size estimates.
Definition at line 61 of file CodeMetrics.h.
Referenced by analyzeBasicBlock().
unsigned llvm::CodeMetrics::NumBlocks = false |
Number of analyzed blocks.
Definition at line 58 of file CodeMetrics.h.
Referenced by analyzeBasicBlock().
unsigned llvm::CodeMetrics::NumCalls = false |
Keep track of the number of calls to 'big' functions.
Definition at line 64 of file CodeMetrics.h.
Referenced by analyzeBasicBlock().
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 70 of file CodeMetrics.h.
Referenced by analyzeBasicBlock().
InstructionCost llvm::CodeMetrics::NumInsts = 0 |
Code size cost of the analyzed blocks.
Definition at line 55 of file CodeMetrics.h.
Referenced by analyzeBasicBlock().
unsigned llvm::CodeMetrics::NumRets = 0 |
How many 'ret' instructions the blocks contain.
Definition at line 78 of file CodeMetrics.h.
Referenced by analyzeBasicBlock().
unsigned llvm::CodeMetrics::NumVectorInsts = 0 |
How many instructions produce vector values.
The inliner is more aggressive with inlining vector kernels.
Definition at line 75 of file CodeMetrics.h.
Referenced by analyzeBasicBlock().
bool llvm::CodeMetrics::usesDynamicAlloca = false |
True if this function calls alloca (in the C sense).
Definition at line 52 of file CodeMetrics.h.
Referenced by analyzeBasicBlock().