mirror of
https://github.com/RPCSX/llvm.git
synced 2026-01-31 01:05:23 +01:00
8de3a54f07
This creates non-linear behavior in the inliner (see more details in r289755's commit thread). git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@290086 91177308-0d34-0410-b5e6-96231b3b80d8
50 lines
1.7 KiB
C++
50 lines
1.7 KiB
C++
//===- PromoteMemToReg.h - Promote Allocas to Scalars -----------*- C++ -*-===//
|
|
//
|
|
// The LLVM Compiler Infrastructure
|
|
//
|
|
// This file is distributed under the University of Illinois Open Source
|
|
// License. See LICENSE.TXT for details.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
//
|
|
// This file exposes an interface to promote alloca instructions to SSA
|
|
// registers, by using the SSA construction algorithm.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#ifndef LLVM_TRANSFORMS_UTILS_PROMOTEMEMTOREG_H
|
|
#define LLVM_TRANSFORMS_UTILS_PROMOTEMEMTOREG_H
|
|
|
|
namespace llvm {
|
|
|
|
template <typename T> class ArrayRef;
|
|
class AllocaInst;
|
|
class DominatorTree;
|
|
class AliasSetTracker;
|
|
class AssumptionCache;
|
|
|
|
/// \brief Return true if this alloca is legal for promotion.
|
|
///
|
|
/// This is true if there are only loads, stores, and lifetime markers
|
|
/// (transitively) using this alloca. This also enforces that there is only
|
|
/// ever one layer of bitcasts or GEPs between the alloca and the lifetime
|
|
/// markers.
|
|
bool isAllocaPromotable(const AllocaInst *AI);
|
|
|
|
/// \brief Promote the specified list of alloca instructions into scalar
|
|
/// registers, inserting PHI nodes as appropriate.
|
|
///
|
|
/// This function makes use of DominanceFrontier information. This function
|
|
/// does not modify the CFG of the function at all. All allocas must be from
|
|
/// the same function.
|
|
///
|
|
/// If AST is specified, the specified tracker is updated to reflect changes
|
|
/// made to the IR.
|
|
void PromoteMemToReg(ArrayRef<AllocaInst *> Allocas, DominatorTree &DT,
|
|
AliasSetTracker *AST = nullptr,
|
|
AssumptionCache *AC = nullptr);
|
|
|
|
} // End llvm namespace
|
|
|
|
#endif
|