llvm-6502/lib/Analysis/VectorUtils.cpp
2015-06-26 18:02:52 +00:00

214 lines
7.0 KiB
C++

//===----------- VectorUtils.cpp - Vectorizer utility functions -----------===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This file defines vectorizer utilities.
//
//===----------------------------------------------------------------------===//
#include "llvm/Analysis/VectorUtils.h"
/// \brief Identify if the intrinsic is trivially vectorizable.
/// This method returns true if the intrinsic's argument types are all
/// scalars for the scalar form of the intrinsic and all vectors for
/// the vector form of the intrinsic.
bool llvm::isTriviallyVectorizable(Intrinsic::ID ID) {
switch (ID) {
case Intrinsic::sqrt:
case Intrinsic::sin:
case Intrinsic::cos:
case Intrinsic::exp:
case Intrinsic::exp2:
case Intrinsic::log:
case Intrinsic::log10:
case Intrinsic::log2:
case Intrinsic::fabs:
case Intrinsic::minnum:
case Intrinsic::maxnum:
case Intrinsic::copysign:
case Intrinsic::floor:
case Intrinsic::ceil:
case Intrinsic::trunc:
case Intrinsic::rint:
case Intrinsic::nearbyint:
case Intrinsic::round:
case Intrinsic::bswap:
case Intrinsic::ctpop:
case Intrinsic::pow:
case Intrinsic::fma:
case Intrinsic::fmuladd:
case Intrinsic::ctlz:
case Intrinsic::cttz:
case Intrinsic::powi:
return true;
default:
return false;
}
}
/// \brief Identifies if the intrinsic has a scalar operand. It check for
/// ctlz,cttz and powi special intrinsics whose argument is scalar.
bool llvm::hasVectorInstrinsicScalarOpd(Intrinsic::ID ID,
unsigned ScalarOpdIdx) {
switch (ID) {
case Intrinsic::ctlz:
case Intrinsic::cttz:
case Intrinsic::powi:
return (ScalarOpdIdx == 1);
default:
return false;
}
}
/// \brief Check call has a unary float signature
/// It checks following:
/// a) call should have a single argument
/// b) argument type should be floating point type
/// c) call instruction type and argument type should be same
/// d) call should only reads memory.
/// If all these condition is met then return ValidIntrinsicID
/// else return not_intrinsic.
llvm::Intrinsic::ID
llvm::checkUnaryFloatSignature(const CallInst &I,
Intrinsic::ID ValidIntrinsicID) {
if (I.getNumArgOperands() != 1 ||
!I.getArgOperand(0)->getType()->isFloatingPointTy() ||
I.getType() != I.getArgOperand(0)->getType() || !I.onlyReadsMemory())
return Intrinsic::not_intrinsic;
return ValidIntrinsicID;
}
/// \brief Check call has a binary float signature
/// It checks following:
/// a) call should have 2 arguments.
/// b) arguments type should be floating point type
/// c) call instruction type and arguments type should be same
/// d) call should only reads memory.
/// If all these condition is met then return ValidIntrinsicID
/// else return not_intrinsic.
llvm::Intrinsic::ID
llvm::checkBinaryFloatSignature(const CallInst &I,
Intrinsic::ID ValidIntrinsicID) {
if (I.getNumArgOperands() != 2 ||
!I.getArgOperand(0)->getType()->isFloatingPointTy() ||
!I.getArgOperand(1)->getType()->isFloatingPointTy() ||
I.getType() != I.getArgOperand(0)->getType() ||
I.getType() != I.getArgOperand(1)->getType() || !I.onlyReadsMemory())
return Intrinsic::not_intrinsic;
return ValidIntrinsicID;
}
/// \brief Returns intrinsic ID for call.
/// For the input call instruction it finds mapping intrinsic and returns
/// its ID, in case it does not found it return not_intrinsic.
llvm::Intrinsic::ID llvm::getIntrinsicIDForCall(CallInst *CI,
const TargetLibraryInfo *TLI) {
// If we have an intrinsic call, check if it is trivially vectorizable.
if (IntrinsicInst *II = dyn_cast<IntrinsicInst>(CI)) {
Intrinsic::ID ID = II->getIntrinsicID();
if (isTriviallyVectorizable(ID) || ID == Intrinsic::lifetime_start ||
ID == Intrinsic::lifetime_end || ID == Intrinsic::assume)
return ID;
return Intrinsic::not_intrinsic;
}
if (!TLI)
return Intrinsic::not_intrinsic;
LibFunc::Func Func;
Function *F = CI->getCalledFunction();
// We're going to make assumptions on the semantics of the functions, check
// that the target knows that it's available in this environment and it does
// not have local linkage.
if (!F || F->hasLocalLinkage() || !TLI->getLibFunc(F->getName(), Func))
return Intrinsic::not_intrinsic;
// Otherwise check if we have a call to a function that can be turned into a
// vector intrinsic.
switch (Func) {
default:
break;
case LibFunc::sin:
case LibFunc::sinf:
case LibFunc::sinl:
return checkUnaryFloatSignature(*CI, Intrinsic::sin);
case LibFunc::cos:
case LibFunc::cosf:
case LibFunc::cosl:
return checkUnaryFloatSignature(*CI, Intrinsic::cos);
case LibFunc::exp:
case LibFunc::expf:
case LibFunc::expl:
return checkUnaryFloatSignature(*CI, Intrinsic::exp);
case LibFunc::exp2:
case LibFunc::exp2f:
case LibFunc::exp2l:
return checkUnaryFloatSignature(*CI, Intrinsic::exp2);
case LibFunc::log:
case LibFunc::logf:
case LibFunc::logl:
return checkUnaryFloatSignature(*CI, Intrinsic::log);
case LibFunc::log10:
case LibFunc::log10f:
case LibFunc::log10l:
return checkUnaryFloatSignature(*CI, Intrinsic::log10);
case LibFunc::log2:
case LibFunc::log2f:
case LibFunc::log2l:
return checkUnaryFloatSignature(*CI, Intrinsic::log2);
case LibFunc::fabs:
case LibFunc::fabsf:
case LibFunc::fabsl:
return checkUnaryFloatSignature(*CI, Intrinsic::fabs);
case LibFunc::fmin:
case LibFunc::fminf:
case LibFunc::fminl:
return checkBinaryFloatSignature(*CI, Intrinsic::minnum);
case LibFunc::fmax:
case LibFunc::fmaxf:
case LibFunc::fmaxl:
return checkBinaryFloatSignature(*CI, Intrinsic::maxnum);
case LibFunc::copysign:
case LibFunc::copysignf:
case LibFunc::copysignl:
return checkBinaryFloatSignature(*CI, Intrinsic::copysign);
case LibFunc::floor:
case LibFunc::floorf:
case LibFunc::floorl:
return checkUnaryFloatSignature(*CI, Intrinsic::floor);
case LibFunc::ceil:
case LibFunc::ceilf:
case LibFunc::ceill:
return checkUnaryFloatSignature(*CI, Intrinsic::ceil);
case LibFunc::trunc:
case LibFunc::truncf:
case LibFunc::truncl:
return checkUnaryFloatSignature(*CI, Intrinsic::trunc);
case LibFunc::rint:
case LibFunc::rintf:
case LibFunc::rintl:
return checkUnaryFloatSignature(*CI, Intrinsic::rint);
case LibFunc::nearbyint:
case LibFunc::nearbyintf:
case LibFunc::nearbyintl:
return checkUnaryFloatSignature(*CI, Intrinsic::nearbyint);
case LibFunc::round:
case LibFunc::roundf:
case LibFunc::roundl:
return checkUnaryFloatSignature(*CI, Intrinsic::round);
case LibFunc::pow:
case LibFunc::powf:
case LibFunc::powl:
return checkBinaryFloatSignature(*CI, Intrinsic::pow);
}
return Intrinsic::not_intrinsic;
}