Line data    Source code

       1             : //===-- AMDGPUInstrInfo.cpp - Base class for AMD GPU InstrInfo ------------===//
       2             : //
       3             : //                     The LLVM Compiler Infrastructure
       4             : //
       5             : // This file is distributed under the University of Illinois Open Source
       6             : // License. See LICENSE.TXT for details.
       7             : //
       8             : //===----------------------------------------------------------------------===//
       9             : //
      10             : /// \file
      11             : /// \brief Implementation of the TargetInstrInfo class that is common to all
      12             : /// AMD GPUs.
      13             : //
      14             : //===----------------------------------------------------------------------===//
      15             : 
      16             : #include "AMDGPUInstrInfo.h"
      17             : #include "AMDGPURegisterInfo.h"
      18             : #include "AMDGPUTargetMachine.h"
      19             : #include "MCTargetDesc/AMDGPUMCTargetDesc.h"
      20             : #include "llvm/CodeGen/MachineFrameInfo.h"
      21             : #include "llvm/CodeGen/MachineInstrBuilder.h"
      22             : #include "llvm/CodeGen/MachineRegisterInfo.h"
      23             : 
      24             : using namespace llvm;
      25             : 
      26             : // Pin the vtable to this file.
      27             : //void AMDGPUInstrInfo::anchor() {}
      28             : 
      29           0 : AMDGPUInstrInfo::AMDGPUInstrInfo(const GCNSubtarget &ST) { }
      30             : 
      31             : 
      32             : // TODO: Should largely merge with AMDGPUTTIImpl::isSourceOfDivergence.
      33          27 : bool AMDGPUInstrInfo::isUniformMMO(const MachineMemOperand *MMO) {
      34             :   const Value *Ptr = MMO->getValue();
      35             :   // UndefValue means this is a load of a kernel input.  These are uniform.
      36             :   // Sometimes LDS instructions have constant pointers.
      37             :   // If Ptr is null, then that means this mem operand contains a
      38             :   // PseudoSourceValue like GOT.
      39          27 :   if (!Ptr || isa<UndefValue>(Ptr) ||
      40          27 :       isa<Constant>(Ptr) || isa<GlobalValue>(Ptr))
      41             :     return true;
      42             : 
      43          27 :   if (MMO->getAddrSpace() == AMDGPUAS::CONSTANT_ADDRESS_32BIT)
      44             :     return true;
      45             : 
      46             :   if (const Argument *Arg = dyn_cast<Argument>(Ptr))
      47           2 :     return AMDGPU::isArgPassedInSGPR(Arg);
      48             : 
      49             :   const Instruction *I = dyn_cast<Instruction>(Ptr);
      50          25 :   return I && I->getMetadata("amdgpu.uniform");
      51             : }