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
SPIRVInlineAsmLowering(const SPIRVTargetLowering & TLI)21 SPIRVInlineAsmLowering::SPIRVInlineAsmLowering(const SPIRVTargetLowering &TLI)
22 : InlineAsmLowering(&TLI) {}
23
lowerAsmOperandForConstraint(Value * Val,StringRef Constraint,std::vector<MachineOperand> & Ops,MachineIRBuilder & MIRBuilder) const24 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