1//===-- AMDGPUInstrInfo.cpp - Base class for AMD GPU InstrInfo ------------===//
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/// \file
10/// \brief Implementation of the TargetInstrInfo class that is common to all
11/// AMD GPUs.
12//
13//===----------------------------------------------------------------------===//
14
15#include "AMDGPUInstrInfo.h"
16#include "AMDGPU.h"
17#include "llvm/CodeGen/MachineInstr.h"
18#include "llvm/CodeGen/MachineMemOperand.h"
19#include "llvm/IR/Constants.h"
20#include "llvm/IR/Instruction.h"
21#include "llvm/IR/Value.h"
22
23using namespace llvm;
24
25// Pin the vtable to this file.
26//void AMDGPUInstrInfo::anchor() {}
27
28AMDGPUInstrInfo::AMDGPUInstrInfo(const GCNSubtarget &ST) { }
29
30Intrinsic::ID AMDGPU::getIntrinsicID(const MachineInstr &I) {
31 return I.getOperand(i: I.getNumExplicitDefs()).getIntrinsicID();
32}
33
34// TODO: Should largely merge with AMDGPUTTIImpl::isSourceOfDivergence.
35bool AMDGPUInstrInfo::isUniformMMO(const MachineMemOperand *MMO) {
36 const Value *Ptr = MMO->getValue();
37 // UndefValue means this is a load of a kernel input. These are uniform.
38 // Sometimes LDS instructions have constant pointers.
39 // If Ptr is null, then that means this mem operand contains a
40 // PseudoSourceValue like GOT.
41 if (!Ptr || isa<UndefValue>(Val: Ptr) ||
42 isa<Constant>(Val: Ptr) || isa<GlobalValue>(Val: Ptr))
43 return true;
44
45 if (MMO->getAddrSpace() == AMDGPUAS::CONSTANT_ADDRESS_32BIT)
46 return true;
47
48 if (const Argument *Arg = dyn_cast<Argument>(Val: Ptr))
49 return AMDGPU::isArgPassedInSGPR(Arg);
50
51 const Instruction *I = dyn_cast<Instruction>(Val: Ptr);
52 return I && I->getMetadata(Kind: "amdgpu.uniform");
53}
54