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/*========================== begin_copyright_notice ============================
Copyright (C) 2019-2021 Intel Corporation
SPDX-License-Identifier: MIT
============================= end_copyright_notice ===========================*/
#include "Compiler/Optimizer/OpenCLPasses/DisableLoopUnrollOnRetry/DisableLoopUnrollOnRetry.hpp"
#include "Compiler/IGCPassSupport.h"
#include "common/LLVMWarningsPush.hpp"
#include <llvm/Pass.h>
#include <llvm/Analysis/LoopInfo.h>
#include <llvm/Transforms/Utils/UnrollLoop.h>
#include "common/LLVMWarningsPop.hpp"
using namespace llvm;
using namespace IGC;
#define PASS_FLAG "igc-disable-loop-unroll"
#define PASS_DESCRIPTION "Disable loop unroll on retry"
#define PASS_CFG_ONLY false
#define PASS_ANALYSIS false
IGC_INITIALIZE_PASS_BEGIN(DisableLoopUnrollOnRetry, PASS_FLAG, PASS_DESCRIPTION, PASS_CFG_ONLY, PASS_ANALYSIS)
IGC_INITIALIZE_PASS_END(DisableLoopUnrollOnRetry, PASS_FLAG, PASS_DESCRIPTION, PASS_CFG_ONLY, PASS_ANALYSIS)
char DisableLoopUnrollOnRetry::ID = 0;
DisableLoopUnrollOnRetry::DisableLoopUnrollOnRetry() : LoopPass(ID) {
initializeDisableLoopUnrollOnRetryPass(*PassRegistry::getPassRegistry());
}
bool DisableLoopUnrollOnRetry::runOnLoop(Loop *L, LPPassManager &LPM) {
bool changed = false;
if (MDNode *LoopID = L->getLoopID()) {
if (!(GetUnrollMetadata(LoopID, "llvm.loop.unroll.enable") || GetUnrollMetadata(LoopID, "llvm.loop.unroll.full") ||
GetUnrollMetadata(LoopID, "llvm.loop.unroll.count"))) {
L->setLoopAlreadyUnrolled(); // This sets loop to llvm.loop.unroll.disable
changed = true;
}
} else {
L->setLoopAlreadyUnrolled(); // This sets loop to llvm.loop.unroll.disable
changed = true;
}
return changed;
}
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