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/*========================== begin_copyright_notice ============================
Copyright (C) 2023 Intel Corporation
SPDX-License-Identifier: MIT
============================= end_copyright_notice ===========================*/
#include "common/LLVMWarningsPush.hpp"
#include <llvm/Pass.h>
#include "common/LLVMWarningsPop.hpp"
#include "Compiler/CISACodeGen/DpasScan.hpp"
#include "Compiler/CISACodeGen/WIAnalysis.hpp"
#include "Compiler/IGCPassSupport.h"
#include "Compiler/MetaDataUtilsWrapper.h"
#include "GenISAIntrinsics/GenIntrinsicInst.h"
using namespace llvm;
using namespace IGC;
// Register pass to igc-opt
#define PASS_FLAG "igc-dpas-scan"
#define PASS_DESCRIPTION "Scans for dpas in conditional block to disable EU fusion feature"
#define PASS_CFG_ONLY false
#define PASS_ANALYSIS false
IGC_INITIALIZE_PASS_BEGIN(DpasScan, PASS_FLAG, PASS_DESCRIPTION, PASS_CFG_ONLY, PASS_ANALYSIS)
IGC_INITIALIZE_PASS_DEPENDENCY(WIAnalysis)
IGC_INITIALIZE_PASS_DEPENDENCY(MetaDataUtilsWrapper)
IGC_INITIALIZE_PASS_END(DpasScan, PASS_FLAG, PASS_DESCRIPTION, PASS_CFG_ONLY, PASS_ANALYSIS)
char DpasScan::ID = 0;
DpasScan::DpasScan() : FunctionPass(DpasScan::ID) { initializeDpasScanPass(*PassRegistry::getPassRegistry()); }
void DpasScan::getAnalysisUsage(AnalysisUsage &AU) const {
AU.addRequired<WIAnalysis>();
AU.addRequired<MetaDataUtilsWrapper>();
AU.addPreservedID(WIAnalysis::ID);
}
bool DpasScan::runOnFunction(Function &F) {
ModuleMetaData *modMD = getAnalysis<MetaDataUtilsWrapper>().getModuleMetaData();
// exit early because DisableEUFusion was already set
if (modMD->compOpt.DisableEUFusion)
return false;
WIAnalysis *analysis = &getAnalysis<WIAnalysis>();
for (auto IIter = inst_begin(F), EIter = inst_end(F); IIter != EIter; ++IIter) {
Instruction *I = &*IIter;
if (auto GInst = dyn_cast<GenIntrinsicInst>(I)) {
auto intrinsidId = GInst->getIntrinsicID();
switch (intrinsidId) {
default:
break;
case GenISAIntrinsic::GenISA_dpas:
case GenISAIntrinsic::GenISA_sub_group_dpas:
if (analysis->insideDivergentCF(I)) {
modMD->compOpt.DisableEUFusion = true;
return true;
}
}
}
}
return false;
}
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