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/*========================== begin_copyright_notice ============================
Copyright (C) 2021 Intel Corporation
SPDX-License-Identifier: MIT
============================= end_copyright_notice ===========================*/
//===----------------------------------------------------------------------===//
///
/// These functions convert load and store instructions that have 64-bit
/// elements (whether scalar or vector) to vectors of dwords.
///
/// This is used by PrepareLoadsStoresPass to run prior to MemOpt to aid
/// vectorization of values with different types.
///
/// For example:
///
/// %x = load i64, i64 addrspace(1)* %"&x"
/// ===>
/// %7 = bitcast i64 addrspace(1)* %"&x" to <2 x i32> addrspace(1)*
/// %8 = load <2 x i32>, <2 x i32> addrspace(1)* %7
/// %9 = bitcast <2 x i32> %8 to i64
///
/// Example with PredicatedLoad:
///
/// %x = call i64 @llvm.genx.GenISA.PredicatedLoad.i64.p1i64.i64(i64 addrspace(1)* %"&x", i64 8, i1 %p, i64 %mv)
/// ===>
/// %7 = bitcast i64 addrspace(1)* %"&x" to <2 x i32> addrspace(1)*
/// %8 = bitcast i64 %mv to <2 x i32>
/// %9 = call <2 x i32> @llvm.genx.GenISA.PredicatedLoad.v2i32.p1v2i32.v2i32(<2 x i32> addrspace(1)* %7, i64 8, i1 %p,
/// <2 x i32> %8) %10 = bitcast <2 x i32> %9 to i64
//===----------------------------------------------------------------------===//
#include "PrepareLoadsStoresUtils.h"
#include "common/LLVMWarningsPush.hpp"
#include "llvmWrapper/Support/Alignment.h"
#include "llvmWrapper/IR/DerivedTypes.h"
#include <llvm/IR/IRBuilder.h>
#include <llvm/IR/NoFolder.h>
#include "common/LLVMWarningsPop.hpp"
using namespace llvm;
using namespace IGC;
using IGCLLVM::getAlign;
template <typename T> static Value *getIntToPtr(IRBuilder<T> &IRB, Value *NewVal, Type *Ty) {
// We must emit scalar inttoptr this late in compilation otherwise it won't
// be handled correctly (by e.g., Emu64Ops).
if (NewVal->getType()->isIntegerTy())
return IRB.CreateIntToPtr(NewVal, Ty);
// otherwise, 'NewVal' and 'Ty' are both vectors and will have the same
// length.
IGCLLVM::FixedVectorType *newVecType = dyn_cast<IGCLLVM::FixedVectorType>(NewVal->getType());
IGCLLVM::FixedVectorType *vecType = dyn_cast<IGCLLVM::FixedVectorType>(Ty);
uint64_t NumElts = newVecType->getNumElements();
IGC_ASSERT(NumElts == vecType->getNumElements());
Value *ResultVec = UndefValue::get(vecType);
auto *ResEltTy = vecType->getElementType();
for (uint32_t i = 0; i < NumElts; i++) {
auto *Elt = IRB.CreateExtractElement(NewVal, i);
auto *Cast = IRB.CreateIntToPtr(Elt, ResEltTy);
ResultVec = IRB.CreateInsertElement(ResultVec, Cast, i);
}
return ResultVec;
}
template <typename T> static Value *getPtrToInt(IRBuilder<T> &IRB, Value *NewVal, Type *Ty) {
// We must emit scalar ptrtoint this late in compilation otherwise it won't
// be handled correctly (by e.g., Emu64Ops).
if (NewVal->getType()->isPointerTy())
return IRB.CreatePtrToInt(NewVal, Ty);
// otherwise, 'NewVal' and 'Ty' are both vectors and will have the same
// length.
IGCLLVM::FixedVectorType *newVecType = dyn_cast<IGCLLVM::FixedVectorType>(NewVal->getType());
IGCLLVM::FixedVectorType *vecType = dyn_cast<IGCLLVM::FixedVectorType>(Ty);
uint64_t NumElts = newVecType->getNumElements();
IGC_ASSERT(NumElts == vecType->getNumElements());
Value *ResultVec = UndefValue::get(Ty);
auto *ResEltTy = vecType->getElementType();
for (uint32_t i = 0; i < NumElts; i++) {
auto *Elt = IRB.CreateExtractElement(NewVal, i);
auto *Cast = IRB.CreatePtrToInt(Elt, ResEltTy);
ResultVec = IRB.CreateInsertElement(ResultVec, Cast, i);
}
return ResultVec;
}
namespace IGC {
template <typename T>
std::pair<Value *, Instruction *> expand64BitLoad(IGCIRBuilder<T> &IRB, const DataLayout &DL, ALoadInst LI) {
auto *Ty = LI.getType();
if (Ty->isAggregateType())
return {};
auto *EltTy = Ty->getScalarType();
auto *OldPtrTy = LI.getPointerOperandType();
uint64_t NumEltBytes = DL.getTypeStoreSize(EltTy);
if (NumEltBytes != 8)
return {};
uint32_t NumElts =
isa<IGCLLVM::FixedVectorType>(Ty) ? (uint32_t)cast<IGCLLVM::FixedVectorType>(Ty)->getNumElements() : 1;
uint32_t NewNumElts = NumElts * 2;
auto *NewTy = IGCLLVM::FixedVectorType::get(IRB.getInt32Ty(), NewNumElts);
auto *PtrTy = PointerType::get(NewTy, OldPtrTy->getPointerAddressSpace());
auto *NewPtr = IRB.CreateBitCast(LI.getPointerOperand(), PtrTy);
Value *MVal = nullptr;
if (auto *PLI = LI.getPredicatedLoadIntrinsic())
MVal = IRB.CreateBitCast(PLI->getMergeValue(), NewTy);
Instruction *NewLI = LI.CreateAlignedLoad(IRB, NewTy, NewPtr, MVal);
NewLI->copyMetadata(*LI.inst());
Value *NewVal = NewLI;
if (Ty->isPtrOrPtrVectorTy()) {
Type *NewTy =
(NumElts == 1) ? (Type *)IRB.getInt64Ty() : (Type *)IGCLLVM::FixedVectorType::get(IRB.getInt64Ty(), NumElts);
NewVal = IRB.CreateBitCast(NewVal, NewTy);
NewVal = getIntToPtr(IRB, NewVal, Ty);
} else {
NewVal = IRB.CreateBitCast(NewVal, Ty);
}
return {NewVal, NewLI};
}
template <typename T>
std::pair<Value *, Instruction *> expand64BitLoad(IGCIRBuilder<T> &IRB, const DataLayout &DL, LoadInst *LI) {
return expand64BitLoad(IRB, DL, ALoadInst::get(LI).value());
}
template <typename T> Instruction *expand64BitStore(IGCIRBuilder<T> &IRB, const DataLayout &DL, AStoreInst SI) {
auto *Ty = SI.getValueOperand()->getType();
if (Ty->isAggregateType())
return nullptr;
auto *EltTy = Ty->getScalarType();
auto *OldPtrTy = SI.getPointerOperandType();
uint64_t NumEltBytes = DL.getTypeStoreSize(EltTy);
if (NumEltBytes != 8)
return nullptr;
uint32_t NumElts =
isa<IGCLLVM::FixedVectorType>(Ty) ? (uint32_t)cast<IGCLLVM::FixedVectorType>(Ty)->getNumElements() : 1;
uint32_t NewNumElts = NumElts * 2;
auto *NewTy = IGCLLVM::FixedVectorType::get(IRB.getInt32Ty(), NewNumElts);
Value *NewVal = SI.getValueOperand();
if (Ty->isPtrOrPtrVectorTy()) {
Type *NewTy =
(NumElts == 1) ? (Type *)IRB.getInt64Ty() : (Type *)IGCLLVM::FixedVectorType::get(IRB.getInt64Ty(), NumElts);
NewVal = getPtrToInt(IRB, NewVal, NewTy);
}
NewVal = IRB.CreateBitCast(NewVal, NewTy);
auto *NewPtr =
IRB.CreateBitCast(SI.getPointerOperand(), NewVal->getType()->getPointerTo(OldPtrTy->getPointerAddressSpace()));
auto *NewST = SI.CreateAlignedStore(IRB, NewVal, NewPtr);
NewST->copyMetadata(*SI.inst());
return NewST;
}
template <typename T> Instruction *expand64BitStore(IGCIRBuilder<T> &IRB, const DataLayout &DL, StoreInst *SI) {
return expand64BitStore(IRB, DL, AStoreInst::get(SI).value());
}
template std::pair<Value *, Instruction *> expand64BitLoad(IGCIRBuilder<> &IRB, const DataLayout &DL, ALoadInst LI);
template std::pair<Value *, Instruction *> expand64BitLoad(IGCIRBuilder<NoFolder> &IRB, const DataLayout &DL,
ALoadInst LI);
template std::pair<Value *, Instruction *> expand64BitLoad(IGCIRBuilder<> &IRB, const DataLayout &DL, LoadInst *LI);
template std::pair<Value *, Instruction *> expand64BitLoad(IGCIRBuilder<NoFolder> &IRB, const DataLayout &DL,
LoadInst *LI);
template Instruction *expand64BitStore(IGCIRBuilder<> &IRB, const DataLayout &DL, AStoreInst SI);
template Instruction *expand64BitStore(IGCIRBuilder<NoFolder> &IRB, const DataLayout &DL, AStoreInst SI);
template Instruction *expand64BitStore(IGCIRBuilder<> &IRB, const DataLayout &DL, StoreInst *SI);
template Instruction *expand64BitStore(IGCIRBuilder<NoFolder> &IRB, const DataLayout &DL, StoreInst *SI);
} // namespace IGC
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