72 lines
2.3 KiB
C
72 lines
2.3 KiB
C
|
//===-- VPlanHCFGBuilder.h --------------------------------------*- C++ -*-===//
|
||
|
|
//
|
||
|
|
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
|
||
|
|
// See https://llvm.org/LICENSE.txt for license information.
|
||
|
|
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
|
||
|
|
//
|
||
|
|
//===----------------------------------------------------------------------===//
|
||
|
|
///
|
||
|
|
/// \file
|
||
|
|
/// This file defines the VPlanHCFGBuilder class which contains the public
|
||
|
|
/// interface (buildHierarchicalCFG) to build a VPlan-based Hierarchical CFG
|
||
|
|
/// (H-CFG) for an incoming IR.
|
||
|
|
///
|
||
|
|
/// A H-CFG in VPlan is a control-flow graph whose nodes are VPBasicBlocks
|
||
|
|
/// and/or VPRegionBlocks (i.e., other H-CFGs). The outermost H-CFG of a VPlan
|
||
|
|
/// consists of a VPRegionBlock, denoted Top Region, which encloses any other
|
||
|
|
/// VPBlockBase in the H-CFG. This guarantees that any VPBlockBase in the H-CFG
|
||
|
|
/// other than the Top Region will have a parent VPRegionBlock and allows us
|
||
|
|
/// to easily add more nodes before/after the main vector loop (such as the
|
||
|
|
/// reduction epilogue).
|
||
|
|
///
|
||
|
|
//===----------------------------------------------------------------------===//
|
||
|
|
|
||
|
|
#ifndef LLVM_TRANSFORMS_VECTORIZE_VPLAN_VPLANHCFGBUILDER_H
|
||
|
|
#define LLVM_TRANSFORMS_VECTORIZE_VPLAN_VPLANHCFGBUILDER_H
|
||
|
|
|
||
|
|
#include "VPlan.h"
|
||
|
|
#include "VPlanDominatorTree.h"
|
||
|
|
#include "VPlanVerifier.h"
|
||
|
|
|
||
|
|
namespace llvm {
|
||
|
|
|
||
|
|
class Loop;
|
||
|
|
class VPlanTestBase;
|
||
|
|
|
||
|
|
/// Main class to build the VPlan H-CFG for an incoming IR.
|
||
|
|
class VPlanHCFGBuilder {
|
||
|
|
friend VPlanTestBase;
|
||
|
|
|
||
|
|
private:
|
||
|
|
// The outermost loop of the input loop nest considered for vectorization.
|
||
|
|
Loop *TheLoop;
|
||
|
|
|
||
|
|
// Loop Info analysis.
|
||
|
|
LoopInfo *LI;
|
||
|
|
|
||
|
|
// The VPlan that will contain the H-CFG we are building.
|
||
|
|
VPlan &Plan;
|
||
|
|
|
||
|
|
// VPlan verifier utility.
|
||
|
|
VPlanVerifier Verifier;
|
||
|
|
|
||
|
|
// Dominator analysis for VPlan plain CFG to be used in the
|
||
|
|
// construction of the H-CFG. This analysis is no longer valid once regions
|
||
|
|
// are introduced.
|
||
|
|
VPDominatorTree VPDomTree;
|
||
|
|
|
||
|
|
/// Build plain CFG for TheLoop. Return a new VPRegionBlock (TopRegion)
|
||
|
|
/// enclosing the plain CFG.
|
||
|
|
VPRegionBlock *buildPlainCFG();
|
||
|
|
|
||
|
|
public:
|
||
|
|
VPlanHCFGBuilder(Loop *Lp, LoopInfo *LI, VPlan &P)
|
||
|
|
: TheLoop(Lp), LI(LI), Plan(P) {}
|
||
|
|
|
||
|
|
/// Build H-CFG for TheLoop and update Plan accordingly.
|
||
|
|
void buildHierarchicalCFG();
|
||
|
|
};
|
||
|
|
} // namespace llvm
|
||
|
|
|
||
|
|
#endif // LLVM_TRANSFORMS_VECTORIZE_VPLAN_VPLANHCFGBUILDER_H
|