A simple and fast domtree-based CSE pass. More...

#include "llvm/Transforms/Scalar/EarlyCSE.h"

Inheritance diagram for llvm::EarlyCSEPass:

Collaboration diagram for llvm::EarlyCSEPass:

Public Member Functions
	EarlyCSEPass (bool UseMemorySSA=false)

PreservedAnalyses	run (Function &F, FunctionAnalysisManager &AM)
	Run the pass over the function. More...

Public Attributes
bool	UseMemorySSA

Additional Inherited Members
Static Public Member Functions inherited from llvm::PassInfoMixin< EarlyCSEPass >
static StringRef	name ()
	Gets the name of the pass we are mixed into. More...

Detailed Description

A simple and fast domtree-based CSE pass.

This pass does a simple depth-first walk over the dominator tree, eliminating trivially redundant instructions and using instsimplify to canonicalize things as it goes. It is intended to be fast and catch obvious cases so that instcombine and other passes are more effective. It is expected that a later pass of GVN will catch the interesting/hard cases.

Definition at line 31 of file EarlyCSE.h.

Constructor & Destructor Documentation

◆ EarlyCSEPass()

llvm::EarlyCSEPass::EarlyCSEPass ( bool UseMemorySSA = false )

inline

Definition at line 32 of file EarlyCSE.h.

References F(), and run().

Member Function Documentation

◆ run()

PreservedAnalyses EarlyCSEPass::run	(	Function &	F,
		FunctionAnalysisManager &	AM
	)

Run the pass over the function.

Definition at line 1226 of file EarlyCSE.cpp.

References llvm::AnalysisUsage::addPreserved(), llvm::AnalysisUsage::addRequired(), llvm::PreservedAnalyses::all(), CSE, F(), llvm::Module::getDataLayout(), llvm::GlobalValue::getParent(), llvm::PassRegistry::getPassRegistry(), llvm::AnalysisManager< IRUnitT, ExtraArgTs >::getResult(), llvm::initializeEarlyCSELegacyPassPass(), llvm::initializeEarlyCSEMemSSALegacyPassPass(), llvm::PreservedAnalyses::preserve(), llvm::PreservedAnalyses::preserveSet(), runOnFunction(), and llvm::AnalysisUsage::setPreservesCFG().

Referenced by EarlyCSEPass().

Member Data Documentation

◆ UseMemorySSA

bool llvm::EarlyCSEPass::UseMemorySSA

Definition at line 37 of file EarlyCSE.h.

The documentation for this struct was generated from the following files:

include/llvm/Transforms/Scalar/EarlyCSE.h
lib/Transforms/Scalar/EarlyCSE.cpp

Public Member Functions

Public Attributes