LLVM
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include
llvm
Transforms
Utils
PromoteMemToReg.h
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//===- 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
llvm
This is an optimization pass for GlobalISel generic memory operations.
Definition:
AddressRanges.h:18
llvm::PromoteMemToReg
void PromoteMemToReg(ArrayRef< AllocaInst * > Allocas, DominatorTree &DT, AssumptionCache *AC=nullptr)
Promote the specified list of alloca instructions into scalar registers, inserting PHI nodes as appro...
Definition:
PromoteMemoryToRegister.cpp:1104
llvm::ArrayRef
ArrayRef(const T &OneElt) -> ArrayRef< T >
llvm::isAllocaPromotable
bool isAllocaPromotable(const AllocaInst *AI)
Return true if this alloca is legal for promotion.
Definition:
PromoteMemoryToRegister.cpp:63
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