48 lines
1.8 KiB
C
48 lines
1.8 KiB
C
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//===- ArgumentPromotion.h - Promote by-reference arguments -----*- C++ -*-===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_TRANSFORMS_IPO_ARGUMENTPROMOTION_H
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#define LLVM_TRANSFORMS_IPO_ARGUMENTPROMOTION_H
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#include "llvm/Analysis/CGSCCPassManager.h"
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#include "llvm/Analysis/LazyCallGraph.h"
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#include "llvm/IR/PassManager.h"
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namespace llvm {
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class TargetTransformInfo;
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/// Argument promotion pass.
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///
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/// This pass walks the functions in each SCC and for each one tries to
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/// transform it and all of its callers to replace indirect arguments with
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/// direct (by-value) arguments.
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class ArgumentPromotionPass : public PassInfoMixin<ArgumentPromotionPass> {
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unsigned MaxElements;
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public:
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ArgumentPromotionPass(unsigned MaxElements = 3u) : MaxElements(MaxElements) {}
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/// Check if callers and the callee \p F agree how promoted arguments would be
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/// passed. The ones that they do not agree on are eliminated from the sets but
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/// the return value has to be observed as well.
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static bool areFunctionArgsABICompatible(
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const Function &F, const TargetTransformInfo &TTI,
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SmallPtrSetImpl<Argument *> &ArgsToPromote,
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SmallPtrSetImpl<Argument *> &ByValArgsToTransform);
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/// Checks if a type could have padding bytes.
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static bool isDenselyPacked(Type *type, const DataLayout &DL);
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PreservedAnalyses run(LazyCallGraph::SCC &C, CGSCCAnalysisManager &AM,
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LazyCallGraph &CG, CGSCCUpdateResult &UR);
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};
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} // end namespace llvm
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#endif // LLVM_TRANSFORMS_IPO_ARGUMENTPROMOTION_H
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