| //===-- VPlanHCFGBuilder.h --------------------------------------*- C++ -*-===// |
| // |
| // The LLVM Compiler Infrastructure |
| // |
| // This file is distributed under the University of Illinois Open Source |
| // License. See LICENSE.TXT for details. |
| // |
| //===----------------------------------------------------------------------===// |
| /// |
| /// \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 "VPlanVerifier.h" |
| |
| namespace llvm { |
| |
| class Loop; |
| |
| /// Main class to build the VPlan H-CFG for an incoming IR. |
| class VPlanHCFGBuilder { |
| private: |
| // The outermost loop of the input loop nest considered for vectorization. |
| Loop *TheLoop; |
| |
| // Loop Info analysis. |
| LoopInfo *LI; |
| |
| // VPlan verifier utility. |
| VPlanVerifier Verifier; |
| |
| public: |
| VPlanHCFGBuilder(Loop *Lp, LoopInfo *LI) : TheLoop(Lp), LI(LI) {} |
| |
| /// Build H-CFG for TheLoop and update \p Plan accordingly. |
| void buildHierarchicalCFG(VPlan &Plan); |
| }; |
| } // namespace llvm |
| |
| #endif // LLVM_TRANSFORMS_VECTORIZE_VPLAN_VPLANHCFGBUILDER_H |