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
25Intrinsic::ID AMDGPU::getIntrinsicID(const MachineInstr &I) {
26 return I.getOperand(i: I.getNumExplicitDefs()).getIntrinsicID();
27}
28
29// TODO: Should largely merge with AMDGPUTTIImpl::isSourceOfDivergence.
30bool AMDGPU::isUniformMMO(const MachineMemOperand *MMO) {
31 const Value *Ptr = MMO->getValue();
32 if (!Ptr) {
33 if (const PseudoSourceValue *PSV = MMO->getPseudoValue()) {
34 return PSV->isConstantPool() || PSV->isStack() || PSV->isGOT() ||
35 PSV->isJumpTable();
36 }
37
38 // Unknown value.
39 return false;
40 }
41
42 // UndefValue means this is a load of a kernel input. These are uniform.
43 // Sometimes LDS instructions have constant pointers.
44 if (isa<UndefValue, Constant, GlobalValue>(Val: Ptr))
45 return true;
46
47 if (MMO->getAddrSpace() == AMDGPUAS::CONSTANT_ADDRESS_32BIT)
48 return true;
49
50 if (const Argument *Arg = dyn_cast<Argument>(Val: Ptr))
51 return AMDGPU::isArgPassedInSGPR(Arg);
52
53 const Instruction *I = dyn_cast<Instruction>(Val: Ptr);
54 return I && I->getMetadata(Kind: "amdgpu.uniform");
55}
56