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/*========================== begin_copyright_notice ============================
Copyright (C) 2017-2021 Intel Corporation
SPDX-License-Identifier: MIT
============================= end_copyright_notice ===========================*/
#ifndef TARGET_GENXGOTOJOIN_H
#define TARGET_GENXGOTOJOIN_H
namespace llvm {
class BasicBlock;
class CallInst;
class DominatorTree;
class Instruction;
class Value;
namespace genx {
// GotoJoin : class containing goto/join related utility functions
class GotoJoin {
public:
// isEMValue : detect whether a value is an EM (execution mask)
static bool isEMValue(Value *V);
// findJoin : given a goto, find the join whose RM it modifies
static CallInst *findJoin(CallInst *Goto);
// isValidJoin : check that the block containing a join is valid
static bool isValidJoin(CallInst *Join);
// isBranchingJoinLabelBlock : check whether a block has a single join and
// is both a join label and a branching join
static bool isBranchingJoinLabelBlock(BasicBlock *BB);
// getBranchingBlockForJoinLabel : if BB is "true" successor of branching
// block, return this branching block. If SkipCriticalEdgeSplitter is set,
// empty critical edge splitter blocks are skipped.
static BasicBlock *getBranchingBlockForBB(BasicBlock *BB,
bool SkipCriticalEdgeSplitter);
// isJoinLabel : see if the block is a join label
static bool isJoinLabel(BasicBlock *BB, bool SkipCriticalEdgeSplitter = false);
// isGotoBlock : see if a basic block is a goto block (hence branching), returning the goto if so
static CallInst *isGotoBlock(BasicBlock *BB);
// isBranchingJoinBlock : see if a basic block is a branching join block
static CallInst *isBranchingJoinBlock(BasicBlock *BB);
// isBranchingGotoJoinBlock : see if a basic block is a branching goto/join block
static CallInst *isBranchingGotoJoinBlock(BasicBlock *BB);
// getLegalInsertionPoint : ensure an insertion point is legal in the presence of SIMD CF
static Instruction *getLegalInsertionPoint(Instruction *InsertBefore, DominatorTree *DomTree);
};
} // End genx namespace
} // End llvm namespace
#endif
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