1 //===- SPIRVISelLowering.cpp - SPIR-V DAG Lowering Impl ---------*- C++ -*-===//
3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4 // See https://llvm.org/LICENSE.txt for license information.
5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
7 //===----------------------------------------------------------------------===//
9 // This file implements the SPIRVTargetLowering class.
11 //===----------------------------------------------------------------------===//
13 #include "SPIRVISelLowering.h"
15 #include "llvm/IR/IntrinsicsSPIRV.h"
17 #define DEBUG_TYPE "spirv-lower"
21 unsigned SPIRVTargetLowering::getNumRegistersForCallingConv(
22 LLVMContext &Context, CallingConv::ID CC, EVT VT) const {
23 // This code avoids CallLowering fail inside getVectorTypeBreakdown
24 // on v3i1 arguments. Maybe we need to return 1 for all types.
25 // TODO: remove it once this case is supported by the default implementation.
26 if (VT.isVector() && VT.getVectorNumElements() == 3 &&
27 (VT.getVectorElementType() == MVT::i1 ||
28 VT.getVectorElementType() == MVT::i8))
30 if (!VT.isVector() && VT.isInteger() && VT.getSizeInBits() <= 64)
32 return getNumRegisters(Context, VT);
35 MVT SPIRVTargetLowering::getRegisterTypeForCallingConv(LLVMContext &Context,
38 // This code avoids CallLowering fail inside getVectorTypeBreakdown
39 // on v3i1 arguments. Maybe we need to return i32 for all types.
40 // TODO: remove it once this case is supported by the default implementation.
41 if (VT.isVector() && VT.getVectorNumElements() == 3) {
42 if (VT.getVectorElementType() == MVT::i1)
44 else if (VT.getVectorElementType() == MVT::i8)
47 return getRegisterType(Context, VT);
50 bool SPIRVTargetLowering::getTgtMemIntrinsic(IntrinsicInfo &Info,
53 unsigned Intrinsic) const {
54 unsigned AlignIdx = 3;
56 case Intrinsic::spv_load:
59 case Intrinsic::spv_store: {
60 if (I.getNumOperands() >= AlignIdx + 1) {
61 auto *AlignOp = cast<ConstantInt>(I.getOperand(AlignIdx));
62 Info.align = Align(AlignOp->getZExtValue());
64 Info.flags = static_cast<MachineMemOperand::Flags>(
65 cast<ConstantInt>(I.getOperand(AlignIdx - 1))->getZExtValue());
66 Info.memVT = MVT::i64;
67 // TODO: take into account opaque pointers (don't use getElementType).
68 // MVT::getVT(PtrTy->getElementType());