IPConstantPropagation.cpp File Reference

#include "llvm/ADT/SmallVector.h"
#include "llvm/ADT/Statistic.h"
#include "llvm/Analysis/ValueTracking.h"
#include "llvm/IR/CallSite.h"
#include "llvm/IR/Constants.h"
#include "llvm/IR/Instructions.h"
#include "llvm/IR/Module.h"
#include "llvm/Pass.h"
#include "llvm/Transforms/IPO.h"

Include dependency graph for IPConstantPropagation.cpp:

Go to the source code of this file.

Macros
#define	DEBUG_TYPE   "ipconstprop"

Functions
	STATISTIC (NumArgumentsProped, "Number of args turned into constants")
	STATISTIC (NumReturnValProped, "Number of return values turned into constants")
static bool	PropagateConstantsIntoArguments (Function &F)
	PropagateConstantsIntoArguments - Look at all uses of the specified function. More...
static bool	PropagateConstantReturn (Function &F)
	INITIALIZE_PASS (IPCP, "ipconstprop", "Interprocedural constant propagation", false, false) ModulePass *llvm

Macro Definition Documentation

DEBUG_TYPE

#define DEBUG_TYPE   "ipconstprop"

Definition at line 29 of file IPConstantPropagation.cpp.

Function Documentation

INITIALIZE_PASS()

INITIALIZE_PASS	(	IPCP	,
		"ipconstprop"	,
		"Interprocedural constant propagation"	,
		false	,
		false
	)

Definition at line 259 of file IPConstantPropagation.cpp.

References F(), PropagateConstantReturn(), and PropagateConstantsIntoArguments().

PropagateConstantReturn()

static bool PropagateConstantReturn ( Function &  F )

static

Definition at line 130 of file IPConstantPropagation.cpp.

References llvm::dyn_cast(), E, llvm::Instruction::eraseFromParent(), llvm::FindInsertedValue(), llvm::UndefValue::get(), llvm::StructType::getElementType(), llvm::StructType::getNumElements(), llvm::Function::getReturnType(), llvm::Function::hasFnAttribute(), I, llvm::MipsISD::Ins, llvm::GlobalValue::isDefinitionExact(), llvm::Type::isVoidTy(), llvm::Attribute::Naked, llvm::SmallVectorTemplateBase< T >::push_back(), llvm::Value::replaceAllUsesWith(), and llvm::SmallVectorBase::size().

Referenced by INITIALIZE_PASS().

PropagateConstantsIntoArguments()

static bool PropagateConstantsIntoArguments ( Function &  F )

static

PropagateConstantsIntoArguments - Look at all uses of the specified function.

If all uses are direct call sites, and all pass a particular constant in for an argument, propagate that constant in as the argument.

Definition at line 51 of file IPConstantPropagation.cpp.

References Arg, llvm::CallSiteBase< FunTy, BBTy, ValTy, UserTy, UseTy, InstrTy, CallTy, InvokeTy, IterTy >::arg_begin(), llvm::Function::arg_begin(), llvm::Function::arg_empty(), llvm::Function::arg_size(), assert(), C, llvm::dyn_cast(), first, llvm::UndefValue::get(), llvm::Value::getType(), llvm::Argument::hasByValAttr(), llvm::Argument::hasInAllocaAttr(), llvm::CallSiteBase< FunTy, BBTy, ValTy, UserTy, UseTy, InstrTy, CallTy, InvokeTy, IterTy >::isCallee(), llvm::Function::onlyReadsMemory(), llvm::Value::replaceAllUsesWith(), llvm::SmallVectorImpl< T >::resize(), second, llvm::SmallVectorBase::size(), llvm::Value::use_empty(), and llvm::Value::uses().

Referenced by INITIALIZE_PASS().

STATISTIC() [1/2]

STATISTIC	(	NumArgumentsProped	,
		"Number of args turned into constants"
	)

STATISTIC() [2/2]

STATISTIC	(	NumReturnValProped	,
		"Number of return values turned into constants"
	)