6024e5c395
clang 20.0.0 (based on r547379) from build 12806354. Bug: http://b/379133546 Test: N/A Change-Id: I2eb8938af55d809de674be63cb30cf27e801862b Upstream-Commit: ad834e67b1105d15ef907f6255d4c96e8e733f57
45 lines
1.6 KiB
C++
45 lines
1.6 KiB
C++
//===- PromoteMemToReg.h - Promote Allocas to Scalars -----------*- 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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//
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// This file exposes an interface to promote alloca instructions to SSA
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// registers, by using the SSA construction algorithm.
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_TRANSFORMS_UTILS_PROMOTEMEMTOREG_H
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#define LLVM_TRANSFORMS_UTILS_PROMOTEMEMTOREG_H
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namespace llvm {
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template <typename T> class ArrayRef;
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class AllocaInst;
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class DominatorTree;
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class AssumptionCache;
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/// Return true if this alloca is legal for promotion.
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///
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/// This is true if there are only loads, stores, and lifetime markers
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/// (transitively) using this alloca. This also enforces that there is only
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/// ever one layer of bitcasts or GEPs between the alloca and the lifetime
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/// markers.
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bool isAllocaPromotable(const AllocaInst *AI);
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/// Promote the specified list of alloca instructions into scalar
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/// registers, inserting PHI nodes as appropriate.
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///
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/// This function makes use of DominanceFrontier information. This function
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/// does not modify the CFG of the function at all. All allocas must be from
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/// the same function.
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///
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void PromoteMemToReg(ArrayRef<AllocaInst *> Allocas, DominatorTree &DT,
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AssumptionCache *AC = nullptr);
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} // End llvm namespace
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#endif
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