The legacy pass manager's instcombine pass.

Synopsis

Declared in <llvm/Transforms/InstCombine/InstCombine.h>

class InstructionCombiningPass
    : public FunctionPass

Description

This is a basic whole‐function wrapper around the instcombine utility. It will try to combine all instructions in the function.

Base Classes

Name

Description

FunctionPass

FunctionPass class ‐ This class is used to implement most global optimizations. Optimizations should subclass this class if they meet the following constraints:

Member Functions

Name

Description

InstructionCombiningPass [constructor]

Construct the legacy instruction combining pass.

operator= [deleted]

Passes are not assignable.

assignPassManager

assignPassManager overloads

createPrinterPass [virtual]

createPrinterPass ‐ Get a function printer pass.

doFinalization [virtual]

Perform any cleanup needed after all passes have run.

doInitialization [virtual]

Perform any initialization needed before any pass is run.

dump

Print this pass's state to stderr for debugging.

dumpPassStructure [virtual]

Print the pass nesting structure for ‐debug‐passes=PassStructure.

getAnalysis

getAnalysis overloads

getAnalysisID

getAnalysisID overloads

getAnalysisIfAvailable

Get an optional analysis result that may already be available.

getAnalysisUsage [virtual]

Declare required and preserved analyses for this pass.

getAsImmutablePass [virtual]

Return this pass as an ImmutablePass, or null if it is not one.

getAsPMDataManager [virtual]

Return this pass as a PMDataManager when it is a nested pass manager.

getPassArgument

Return a nice clean name for a pass corresponding to that used to enable the pass in opt.

getPassID

getPassID ‐ Return the PassID number that corresponds to this pass.

getPassKind

Return the kind of pass (module, function, loop, etc.).

getPassName [virtual]

Return a human‐readable name for this pass.

getPotentialPassManagerType [virtual]

Return what kind of Pass Manager can manage this pass.

getResolver

Return the analysis resolver installed for this pass.

mustPreserveAnalysisID

Report whether the analysis identified by AID must be preserved.

preparePassManager [virtual]

Check whether available pass managers are suitable for this pass.

print [virtual]

Print the internal state of this pass for analysis dumping.

printIRUnit [virtual]

Serialize the IR unit this pass operates on for ‐‐print‐changed.

releaseMemory [virtual]

Release memory held by this pass when it is no longer needed.

runOnFunction [virtual]

Run instruction combining over function F.

setResolver

Install the analysis resolver used to satisfy this pass's dependencies.

verifyAnalysis [virtual]

verifyAnalysis() ‐ This member can be implemented by a analysis pass to check state of analysis information.

Static Member Functions

Name

Description

createPass

Construct a new instance of the pass identified by ID.

lookupPassInfo

lookupPassInfo overloads

Static Data Members

Name

Description

ID

Pass identification, replacement for typeid.

Protected Member Functions

Name

Description

skipFunction

Check whether this optional pass should be skipped for F.

Non-Member Functions

Name

Description

getBestSimplifyQuery

Build a SimplifyQuery from analyses currently valid in a pass.

getPassTimer

Request the timer for this legacy‐pass‐manager's pass instance.

isBitcodeWriterPass

Check whether a pass is a BitcodeWriterPass.

isIRPrintingPass

Return true if a pass is for IR printing.

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