InstCombineAddSub.cpp File Reference

#include "InstCombine.h"
#include "llvm/ADT/STLExtras.h"
#include "llvm/Analysis/InstructionSimplify.h"
#include "llvm/IR/DataLayout.h"
#include "llvm/IR/GetElementPtrTypeIterator.h"
#include "llvm/IR/PatternMatch.h"

Include dependency graph for InstCombineAddSub.cpp:

Go to the source code of this file.

Defines
#define	DEBUG_TYPE   "instcombine"
Functions
static bool	checkRippleForAdd (const APInt &Op0KnownZero, const APInt &Op1KnownZero)
static Value *	checkForNegativeOperand (BinaryOperator &I, InstCombiner::BuilderTy *Builder)

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Define Documentation

#define DEBUG_TYPE   "instcombine"

Definition at line 23 of file InstCombineAddSub.cpp.

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Function Documentation

static Value* checkForNegativeOperand	(	BinaryOperator &	I,
		InstCombiner::BuilderTy *	Builder
	)		[static]

Definition at line 1016 of file InstCombineAddSub.cpp.

References llvm::APInt::countTrailingZeros(), llvm::IRBuilder< preserveNames, T, Inserter >::CreateAnd(), llvm::IRBuilder< preserveNames, T, Inserter >::CreateOr(), llvm::IRBuilder< preserveNames, T, Inserter >::CreateSub(), llvm::User::getOperand(), llvm::Value::hasOneUse(), llvm::PatternMatch::m_Add(), llvm::PatternMatch::m_And(), llvm::PatternMatch::m_APInt(), llvm::PatternMatch::m_One(), llvm::PatternMatch::m_Or(), llvm::PatternMatch::m_Value(), llvm::PatternMatch::m_Xor(), llvm::PatternMatch::match(), std::swap(), llvm::X, and Y.

Referenced by llvm::InstCombiner::visitAdd().

static bool checkRippleForAdd	(	const APInt &	Op0KnownZero,
		const APInt &	Op1KnownZero
	)		[static]

Definition at line 872 of file InstCombineAddSub.cpp.

References llvm::APInt::clearBit(), llvm::APInt::countLeadingZeros(), llvm::APInt::countPopulation(), and llvm::APInt::getBitWidth().