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/*========================== begin_copyright_notice ============================
Copyright (C) 2020-2021 Intel Corporation
SPDX-License-Identifier: MIT
============================= end_copyright_notice ===========================*/
//===----------------------------------------------------------------------===//
///
/// All this does is invoke the inliner.
///
//===----------------------------------------------------------------------===//
#include "IGC/common/StringMacros.hpp"
#include "RTBuilder.h"
#include "Compiler/IGCPassSupport.h"
#include "iStdLib/utility.h"
#include "common/LLVMUtils.h"
#include "common/LLVMWarningsPush.hpp"
#include <llvm/Transforms/IPO/AlwaysInliner.h>
#include "common/LLVMWarningsPop.hpp"
using namespace llvm;
using namespace IGC;
class InlineMergeCallsPass : public ModulePass
{
public:
InlineMergeCallsPass() : ModulePass(ID)
{
initializeInlineMergeCallsPassPass(*PassRegistry::getPassRegistry());
}
bool runOnModule(Module& M) override;
StringRef getPassName() const override
{
return "InlineMergeCallsPass";
}
void getAnalysisUsage(llvm::AnalysisUsage& AU) const override
{
}
static char ID;
};
char InlineMergeCallsPass::ID = 0;
// Register pass to igc-opt
#define PASS_FLAG "raytracing-inline-merge-calls"
#define PASS_DESCRIPTION "Inline __mergeContinuation after inlining continuations"
#define PASS_CFG_ONLY false
#define PASS_ANALYSIS false
IGC_INITIALIZE_PASS_BEGIN(InlineMergeCallsPass, PASS_FLAG, PASS_DESCRIPTION, PASS_CFG_ONLY, PASS_ANALYSIS)
IGC_INITIALIZE_PASS_END(InlineMergeCallsPass, PASS_FLAG, PASS_DESCRIPTION, PASS_CFG_ONLY, PASS_ANALYSIS)
bool InlineMergeCallsPass::runOnModule(Module& M)
{
// Prior in the pipeline, we have run tail call elimination so that all
// the recursive calls from __mergeContinuation to itself have been
// converted into branches. We can now inline it here given that all
// recursion has been eliminated.
if (auto * mergedContinuationFunc = M.getFunction(RTBuilder::MergeFuncName))
{
mergedContinuationFunc->addFnAttr(llvm::Attribute::AttrKind::AlwaysInline);
mergedContinuationFunc->setLinkage(GlobalValue::InternalLinkage);
legacy::PassManager PM;
PM.add(createAlwaysInlinerLegacyPass());
PM.run(M);
}
return true;
}
namespace IGC
{
Pass* createInlineMergeCallsPass(void)
{
return new InlineMergeCallsPass();
}
} // namespace IGC
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