struct CodeMetrics

Declaration

struct CodeMetrics { /* full declaration omitted */ };

Description

Utility to calculate the size and a few similar metrics for a set of basic blocks.

Declared at: llvm/include/llvm/Analysis/CodeMetrics.h:32

Member Variables

public bool exposesReturnsTwice = false

True if this function contains a call to setjmp or other functions with attribute "returns twice" without having the attribute itself.

public bool isRecursive = false

True if this function calls itself.

public bool notDuplicatable = false

True if this function contains one or more indirect branches, or it contains one or more 'noduplicate' instructions.

public bool convergent = false

True if this function contains a call to a convergent function.

public bool usesDynamicAlloca = false

True if this function calls alloca (in the C sense).

public unsigned int NumInsts = false

Number of instructions in the analyzed blocks.

public unsigned int NumBlocks = false

Number of analyzed blocks.

public DenseMap<const llvm::BasicBlock*, unsigned int> NumBBInsts

Keeps track of basic block code size estimates.

public unsigned int NumCalls = false

Keep track of the number of calls to 'big' functions.

public unsigned int NumInlineCandidates = 0

These are likely targets for future inlining, likely exposed by interleaved devirtualization.

public unsigned int NumVectorInsts = 0

The inliner is more aggressive with inlining vector kernels.

public unsigned int NumRets = 0

How many 'ret' instructions the blocks contain.

Method Overview

• public void analyzeBasicBlock(const llvm::BasicBlock * BB, const llvm::TargetTransformInfo & TTI, const SmallPtrSetImpl<const llvm::Value *> & EphValues)
• public static void collectEphemeralValues(const llvm::Loop * L, llvm::AssumptionCache * AC, SmallPtrSetImpl<const llvm::Value *> & EphValues)
• public static void collectEphemeralValues(const llvm::Function * L, llvm::AssumptionCache * AC, SmallPtrSetImpl<const llvm::Value *> & EphValues)

Methods

¶void analyzeBasicBlock(
    const llvm::BasicBlock* BB,
    const llvm::TargetTransformInfo& TTI,
    const SmallPtrSetImpl<const llvm::Value*>&
        EphValues)

Description

Add information about a block to the current state.

Declared at: llvm/include/llvm/Analysis/CodeMetrics.h:79

Parameters

const llvm::BasicBlock* BB

const llvm::TargetTransformInfo& TTI

const SmallPtrSetImpl<const llvm::Value*>& EphValues

¶static void collectEphemeralValues(
    const llvm::Loop* L,
    llvm::AssumptionCache* AC,
    SmallPtrSetImpl<const llvm::Value*>&
        EphValues)

Description

Collect a loop's ephemeral values (those used only by an assume or similar intrinsics in the loop).

Declared at: llvm/include/llvm/Analysis/CodeMetrics.h:84

Parameters

const llvm::Loop* L

llvm::AssumptionCache* AC

SmallPtrSetImpl<const llvm::Value*>& EphValues

¶static void collectEphemeralValues(
    const llvm::Function* L,
    llvm::AssumptionCache* AC,
    SmallPtrSetImpl<const llvm::Value*>&
        EphValues)

Description

Collect a functions's ephemeral values (those used only by an assume or similar intrinsics in the function).

Declared at: llvm/include/llvm/Analysis/CodeMetrics.h:89

Parameters

const llvm::Function* L

llvm::AssumptionCache* AC

SmallPtrSetImpl<const llvm::Value*>& EphValues