IntegerDivision.cpp File Reference

#include "llvm/Transforms/Utils/IntegerDivision.h"
#include "llvm/IR/Function.h"
#include "llvm/IR/IRBuilder.h"
#include "llvm/IR/Instructions.h"
#include "llvm/IR/Intrinsics.h"

Include dependency graph for IntegerDivision.cpp:

Go to the source code of this file.

Macros
#define	DEBUG_TYPE   "integer-division"

Functions
static Value *	generateSignedRemainderCode (Value *Dividend, Value *Divisor, IRBuilder<> &Builder)
static Value *	generatedUnsignedRemainderCode (Value *Dividend, Value *Divisor, IRBuilder<> &Builder)
static Value *	generateSignedDivisionCode (Value *Dividend, Value *Divisor, IRBuilder<> &Builder)
static Value *	generateUnsignedDivisionCode (Value *Dividend, Value *Divisor, IRBuilder<> &Builder)

Macro Definition Documentation

#define DEBUG_TYPE   "integer-division"

Definition at line 17 of file IntegerDivision.cpp.

Function Documentation

static Value* generatedUnsignedRemainderCode ( Value *  Dividend, Value *  Divisor, IRBuilder<> &  Builder  )

static

Generate code to compute the remainder of two unsigned integers. Returns the remainder. Builder's insert point should be pointing where the caller wants code generated, e.g. at the urem instruction. This will generate a udiv in the process, and Builder's insert point will be pointing at the udiv (if present, i.e. not folded), ready to be expanded if the user wishes

Definition at line 67 of file IntegerDivision.cpp.

References llvm::IRBuilder< preserveNames, T, Inserter >::CreateMul(), llvm::IRBuilder< preserveNames, T, Inserter >::CreateSub(), llvm::IRBuilder< preserveNames, T, Inserter >::CreateUDiv(), and llvm::IRBuilderBase::SetInsertPoint().

Referenced by llvm::expandRemainder().

static Value* generateSignedDivisionCode ( Value *  Dividend, Value *  Divisor, IRBuilder<> &  Builder  )

static

Generate code to divide two signed integers. Returns the quotient, rounded towards 0. Builder's insert point should be pointing where the caller wants code generated, e.g. at the sdiv instruction. This will generate a udiv in the process, and Builder's insert point will be pointing at the udiv (if present, i.e. not folded), ready to be expanded if the user wishes.

Definition at line 89 of file IntegerDivision.cpp.

References llvm::IRBuilder< preserveNames, T, Inserter >::CreateAShr(), llvm::IRBuilder< preserveNames, T, Inserter >::CreateSub(), llvm::IRBuilder< preserveNames, T, Inserter >::CreateUDiv(), llvm::IRBuilder< preserveNames, T, Inserter >::CreateXor(), llvm::IRBuilderBase::getInt32(), and llvm::IRBuilderBase::SetInsertPoint().

Referenced by llvm::expandDivision().

static Value* generateSignedRemainderCode ( Value *  Dividend, Value *  Divisor, IRBuilder<> &  Builder  )

static

Generate code to compute the remainder of two signed integers. Returns the remainder, which will have the sign of the dividend. Builder's insert point should be pointing where the caller wants code generated, e.g. at the srem instruction. This will generate a urem in the process, and Builder's insert point will be pointing at the uren (if present, i.e. not folded), ready to be expanded if the user wishes

Definition at line 32 of file IntegerDivision.cpp.

References llvm::IRBuilder< preserveNames, T, Inserter >::CreateAShr(), llvm::IRBuilder< preserveNames, T, Inserter >::CreateSub(), llvm::IRBuilder< preserveNames, T, Inserter >::CreateURem(), llvm::IRBuilder< preserveNames, T, Inserter >::CreateXor(), llvm::IRBuilderBase::getInt32(), and llvm::IRBuilderBase::SetInsertPoint().

Referenced by llvm::expandRemainder().

static Value* generateUnsignedDivisionCode ( Value *  Dividend, Value *  Divisor, IRBuilder<> &  Builder  )

static

Generates code to divide two unsigned scalar 32-bit integers. Returns the quotient, rounded towards 0. Builder's insert point should be pointing where the caller wants code generated, e.g. at the udiv instruction.

Definition at line 125 of file IntegerDivision.cpp.

References llvm::PHINode::addIncoming(), llvm::BasicBlock::begin(), llvm::BasicBlock::Create(), llvm::IRBuilder< preserveNames, T, Inserter >::CreateAdd(), llvm::IRBuilder< preserveNames, T, Inserter >::CreateAnd(), llvm::IRBuilder< preserveNames, T, Inserter >::CreateAShr(), llvm::IRBuilder< preserveNames, T, Inserter >::CreateBr(), llvm::IRBuilder< preserveNames, T, Inserter >::CreateCall2(), llvm::IRBuilder< preserveNames, T, Inserter >::CreateCondBr(), llvm::IRBuilder< preserveNames, T, Inserter >::CreateICmpEQ(), llvm::IRBuilder< preserveNames, T, Inserter >::CreateICmpUGT(), llvm::IRBuilder< preserveNames, T, Inserter >::CreateLShr(), llvm::IRBuilder< preserveNames, T, Inserter >::CreateOr(), llvm::IRBuilder< preserveNames, T, Inserter >::CreatePHI(), llvm::IRBuilder< preserveNames, T, Inserter >::CreateSelect(), llvm::IRBuilder< preserveNames, T, Inserter >::CreateShl(), llvm::IRBuilder< preserveNames, T, Inserter >::CreateSub(), llvm::Intrinsic::ctlz, llvm::Instruction::eraseFromParent(), F(), llvm::IRBuilderBase::getContext(), llvm::Intrinsic::getDeclaration(), llvm::IRBuilderBase::GetInsertBlock(), llvm::IRBuilderBase::GetInsertPoint(), llvm::IRBuilderBase::getInt32(), llvm::IRBuilderBase::getInt32Ty(), llvm::BasicBlock::getParent(), llvm::GlobalValue::getParent(), llvm::ConstantInt::getSigned(), llvm::BasicBlock::getTerminator(), llvm::IRBuilderBase::getTrue(), llvm::IRBuilderBase::SetInsertPoint(), llvm::Value::setName(), and llvm::BasicBlock::splitBasicBlock().

Referenced by llvm::expandDivision().