IntrinsicsOpt Class Reference

Inheritance diagram for IntrinsicsOpt:

Collaboration diagram for IntrinsicsOpt:

Classes
struct	BlendInstruction
struct	MaskInstruction

Public Member Functions
	IntrinsicsOpt ()
llvm::StringRef	getPassName () const
bool	runOnBasicBlock (llvm::BasicBlock &BB)
bool	runOnFunction (llvm::Function &F)

Static Public Attributes
static char	ID = 0

Private Member Functions
bool	matchesMaskInstruction (llvm::Function *function)
BlendInstruction *	matchingBlendInstruction (llvm::Function *function)

Private Attributes
std::vector< MaskInstruction >	maskInstructions
std::vector< BlendInstruction >	blendInstructions

Detailed Description

This is a relatively simple optimization pass that does a few small optimizations that LLVM's x86 optimizer doesn't currently handle. (Specifically, MOVMSK of a constant can be replaced with the corresponding constant value, BLENDVPS and AVX masked load/store with either an 'all on' or 'all off' masks can be replaced with simpler operations.

Todo:

The better thing to do would be to submit a patch to LLVM to get these; they're presumably pretty simple patterns to match.

Definition at line 676 of file opt.cpp.

Constructor & Destructor Documentation

IntrinsicsOpt()

IntrinsicsOpt::IntrinsicsOpt ( )

inline

Definition at line 678 of file opt.cpp.

Member Function Documentation

getPassName()

llvm::StringRef IntrinsicsOpt::getPassName ( ) const

inline

Definition at line 680 of file opt.cpp.

matchesMaskInstruction()

bool IntrinsicsOpt::matchesMaskInstruction ( llvm::Function *  function )

private

Definition at line 943 of file opt.cpp.

matchingBlendInstruction()

IntrinsicsOpt::BlendInstruction * IntrinsicsOpt::matchingBlendInstruction ( llvm::Function *  function )

private

Definition at line 952 of file opt.cpp.

runOnBasicBlock()

bool IntrinsicsOpt::runOnBasicBlock

(

llvm::BasicBlock &

BB

)

Definition at line 743 of file opt.cpp.

References IntrinsicsOpt::BlendInstruction::allOnMask, Assert, DEBUG_END_PASS, DEBUG_START_PASS, Opt::forceAlignedMemory, g, Target::getNativeVectorAlignment(), LLVMTypes::Int32Type, lCopyMetadata(), lGetMask(), lIsUndef(), LLVMGetName(), LLVMInt32(), LLVMInt64(), m, Module::module, IntrinsicsOpt::BlendInstruction::op0, IntrinsicsOpt::BlendInstruction::op1, IntrinsicsOpt::BlendInstruction::opFactor, Globals::opt, and Globals::target.

runOnFunction()

bool IntrinsicsOpt::runOnFunction

(

llvm::Function &

F

)

Definition at line 934 of file opt.cpp.

Member Data Documentation

blendInstructions

std::vector<BlendInstruction> IntrinsicsOpt::blendInstructions

private

Definition at line 715 of file opt.cpp.

ID

char IntrinsicsOpt::ID = 0

static

Definition at line 686 of file opt.cpp.

maskInstructions

std::vector<MaskInstruction> IntrinsicsOpt::maskInstructions

private

Definition at line 693 of file opt.cpp.

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The documentation for this class was generated from the following file:

• opt.cpp