1 //===--- SPIRVInlineAsmLowering.cpp - Inline Asm lowering -------*- C++ -*-===// 2 // 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 6 // 7 //===----------------------------------------------------------------------===// 8 // 9 // This file implements the lowering of LLVM inline asm calls to machine code 10 // calls for GlobalISel. 11 // 12 //===----------------------------------------------------------------------===// 13 14 #include "SPIRVInlineAsmLowering.h" 15 #include "SPIRVSubtarget.h" 16 #include "llvm/IR/IntrinsicInst.h" 17 #include "llvm/IR/IntrinsicsSPIRV.h" 18 19 using namespace llvm; 20 21 SPIRVInlineAsmLowering::SPIRVInlineAsmLowering(const SPIRVTargetLowering &TLI) 22 : InlineAsmLowering(&TLI) {} 23 24 bool SPIRVInlineAsmLowering::lowerAsmOperandForConstraint( 25 Value *Val, StringRef Constraint, std::vector<MachineOperand> &Ops, 26 MachineIRBuilder &MIRBuilder) const { 27 Value *ValOp = nullptr; 28 if (isa<ConstantInt>(Val)) { 29 ValOp = Val; 30 } else if (ConstantFP *CFP = dyn_cast<ConstantFP>(Val)) { 31 Ops.push_back(MachineOperand::CreateFPImm(CFP)); 32 return true; 33 } else if (auto *II = dyn_cast<IntrinsicInst>(Val)) { 34 if (II->getIntrinsicID() == Intrinsic::spv_track_constant) { 35 if (isa<ConstantInt>(II->getOperand(0))) { 36 ValOp = II->getOperand(0); 37 } else if (ConstantFP *CFP = dyn_cast<ConstantFP>(II->getOperand(0))) { 38 Ops.push_back(MachineOperand::CreateFPImm(CFP)); 39 return true; 40 } 41 } 42 } 43 return ValOp ? InlineAsmLowering::lowerAsmOperandForConstraint( 44 ValOp, Constraint, Ops, MIRBuilder) 45 : false; 46 } 47