InstructionSimplifyPass Class Reference

Inheritance diagram for InstructionSimplifyPass:

Collaboration diagram for InstructionSimplifyPass:

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

Static Public Attributes
static char	ID = 0

Static Private Member Functions
static bool	simplifySelect (llvm::SelectInst *selectInst, llvm::BasicBlock::iterator iter)
static llvm::Value *	simplifyBoolVec (llvm::Value *value)
static bool	simplifyCall (llvm::CallInst *callInst, llvm::BasicBlock::iterator iter)

Detailed Description

This simple optimization pass looks for a vector select instruction with an all-on or all-off constant mask, simplifying it to the appropriate operand if so.

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 972 of file opt.cpp.

Constructor & Destructor Documentation

InstructionSimplifyPass()

InstructionSimplifyPass::InstructionSimplifyPass ( )

inline

Definition at line 974 of file opt.cpp.

Member Function Documentation

getPassName()

llvm::StringRef InstructionSimplifyPass::getPassName ( ) const

inline

Definition at line 976 of file opt.cpp.

runOnBasicBlock()

bool InstructionSimplifyPass::runOnBasicBlock

(

llvm::BasicBlock &

BB

)

Definition at line 1080 of file opt.cpp.

References DEBUG_END_PASS, and DEBUG_START_PASS.

runOnFunction()

bool InstructionSimplifyPass::runOnFunction

(

llvm::Function &

F

)

Definition at line 1104 of file opt.cpp.

simplifyBoolVec()

llvm::Value * InstructionSimplifyPass::simplifyBoolVec ( llvm::Value *  value )

staticprivate

Definition at line 990 of file opt.cpp.

References LLVMTypes::Int1VectorType.

simplifyCall()

bool InstructionSimplifyPass::simplifyCall ( llvm::CallInst *  callInst, llvm::BasicBlock::iterator  iter  )

staticprivate

Definition at line 1064 of file opt.cpp.

References lGetMask(), LLVMInt64(), m, and Module::module.

simplifySelect()

bool InstructionSimplifyPass::simplifySelect ( llvm::SelectInst *  selectInst, llvm::BasicBlock::iterator  iter  )

staticprivate

Definition at line 1028 of file opt.cpp.

References ALL_OFF, ALL_ON, Assert, and lGetMaskStatus().

Member Data Documentation

ID

char InstructionSimplifyPass::ID = 0

static

Definition at line 980 of file opt.cpp.

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

• opt.cpp