| 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 | |
| 23 | using namespace llvm; |
| 24 | |
| 25 | // Pin the vtable to this file. |
| 26 | //void AMDGPUInstrInfo::anchor() {} |
| 27 | |
| 28 | AMDGPUInstrInfo::AMDGPUInstrInfo(const GCNSubtarget &ST) { } |
| 29 | |
| 30 | Intrinsic::ID AMDGPU::getIntrinsicID(const MachineInstr &I) { |
| 31 | return I.getOperand(i: I.getNumExplicitDefs()).getIntrinsicID(); |
| 32 | } |
| 33 | |
| 34 | // TODO: Should largely merge with AMDGPUTTIImpl::isSourceOfDivergence. |
| 35 | bool 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 |