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300aaa4d61
r332654 was reverted due to an unused function warning in release build. This commit includes the same code with the warning silenced. Differential Revision: https://reviews.llvm.org/D44338 llvm-svn: 332860
56 lines
1.8 KiB
C++
56 lines
1.8 KiB
C++
//===-- VPlanHCFGBuilder.h --------------------------------------*- C++ -*-===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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///
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/// \file
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/// This file defines the VPlanHCFGBuilder class which contains the public
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/// interface (buildHierarchicalCFG) to build a VPlan-based Hierarchical CFG
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/// (H-CFG) for an incoming IR.
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///
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/// A H-CFG in VPlan is a control-flow graph whose nodes are VPBasicBlocks
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/// and/or VPRegionBlocks (i.e., other H-CFGs). The outermost H-CFG of a VPlan
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/// consists of a VPRegionBlock, denoted Top Region, which encloses any other
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/// VPBlockBase in the H-CFG. This guarantees that any VPBlockBase in the H-CFG
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/// other than the Top Region will have a parent VPRegionBlock and allows us
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/// to easily add more nodes before/after the main vector loop (such as the
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/// reduction epilogue).
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///
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_TRANSFORMS_VECTORIZE_VPLAN_VPLANHCFGBUILDER_H
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#define LLVM_TRANSFORMS_VECTORIZE_VPLAN_VPLANHCFGBUILDER_H
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#include "VPlan.h"
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#include "VPlanVerifier.h"
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namespace llvm {
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class Loop;
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/// Main class to build the VPlan H-CFG for an incoming IR.
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class VPlanHCFGBuilder {
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private:
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// The outermost loop of the input loop nest considered for vectorization.
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Loop *TheLoop;
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// Loop Info analysis.
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LoopInfo *LI;
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// VPlan verifier utility.
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VPlanVerifier Verifier;
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public:
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VPlanHCFGBuilder(Loop *Lp, LoopInfo *LI) : TheLoop(Lp), LI(LI) {}
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/// Build H-CFG for TheLoop and update \p Plan accordingly.
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void buildHierarchicalCFG(VPlan &Plan);
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};
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} // namespace llvm
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#endif // LLVM_TRANSFORMS_VECTORIZE_VPLAN_VPLANHCFGBUILDER_H
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