// FIXME: Move to this file: BasicBlock::removePredecessor, BB::splitBasicBlock
#include "llvm/IR/BasicBlock.h"
-#include "llvm/Support/CFG.h"
+#include "llvm/IR/CFG.h"
namespace llvm {
class AliasAnalysis;
+class DominatorTree;
class Instruction;
class MDNode;
class Pass;
/// predecessors.
void DeleteDeadBlock(BasicBlock *BB);
-
/// FoldSingleEntryPHINodes - We know that BB has one predecessor. If there are
/// any single-entry PHI nodes in it, fold them away. This handles the case
/// when all entries to the PHI nodes in a block are guaranteed equal, such as
/// when the block has exactly one predecessor.
-void FoldSingleEntryPHINodes(BasicBlock *BB, Pass *P = 0);
+void FoldSingleEntryPHINodes(BasicBlock *BB, Pass *P = nullptr);
/// DeleteDeadPHIs - Examine each PHI in the given block and delete it if it
/// is dead. Also recursively delete any operands that become dead as
/// a result. This includes tracing the def-use list from the PHI to see if
/// it is ultimately unused or if it reaches an unused cycle. Return true
/// if any PHIs were deleted.
-bool DeleteDeadPHIs(BasicBlock *BB, const TargetLibraryInfo *TLI = 0);
+bool DeleteDeadPHIs(BasicBlock *BB, const TargetLibraryInfo *TLI = nullptr);
/// MergeBlockIntoPredecessor - Attempts to merge a block into its predecessor,
/// if possible. The return value indicates success or failure.
-bool MergeBlockIntoPredecessor(BasicBlock *BB, Pass *P = 0);
+bool MergeBlockIntoPredecessor(BasicBlock *BB, Pass *P = nullptr);
// ReplaceInstWithValue - Replace all uses of an instruction (specified by BI)
// with a value, then remove and delete the original instruction.
/// to.
///
BasicBlock *SplitCriticalEdge(TerminatorInst *TI, unsigned SuccNum,
- Pass *P = 0, bool MergeIdenticalEdges = false,
+ Pass *P = nullptr,
+ bool MergeIdenticalEdges = false,
bool DontDeleteUselessPHIs = false,
bool SplitLandingPads = false);
inline BasicBlock *SplitCriticalEdge(BasicBlock *BB, succ_iterator SI,
- Pass *P = 0) {
+ Pass *P = nullptr) {
return SplitCriticalEdge(BB->getTerminator(), SI.getSuccessorIndex(), P);
}
/// This updates all of the same analyses as the other SplitCriticalEdge
/// function. If P is specified, it updates the analyses
/// described above.
-inline bool SplitCriticalEdge(BasicBlock *Succ, pred_iterator PI, Pass *P = 0) {
+inline bool SplitCriticalEdge(BasicBlock *Succ, pred_iterator PI,
+ Pass *P = nullptr) {
bool MadeChange = false;
TerminatorInst *TI = (*PI)->getTerminator();
for (unsigned i = 0, e = TI->getNumSuccessors(); i != e; ++i)
/// an edge between the two blocks. If P is specified, it updates the analyses
/// described above.
inline BasicBlock *SplitCriticalEdge(BasicBlock *Src, BasicBlock *Dst,
- Pass *P = 0,
+ Pass *P = nullptr,
bool MergeIdenticalEdges = false,
bool DontDeleteUselessPHIs = false) {
TerminatorInst *TI = Src->getTerminator();
/// is an exit of a loop with other exits).
///
BasicBlock *SplitBlockPredecessors(BasicBlock *BB, ArrayRef<BasicBlock*> Preds,
- const char *Suffix, Pass *P = 0);
+ const char *Suffix, Pass *P = nullptr);
/// SplitLandingPadPredecessors - This method transforms the landing pad,
/// OrigBB, by introducing two new basic blocks into the function. One of those
/// If Unreachable is true, then ThenBlock ends with
/// UnreachableInst, otherwise it branches to Tail.
/// Returns the NewBasicBlock's terminator.
+///
+/// Updates DT if given.
TerminatorInst *SplitBlockAndInsertIfThen(Value *Cond, Instruction *SplitBefore,
bool Unreachable,
- MDNode *BranchWeights = 0);
+ MDNode *BranchWeights = nullptr,
+ DominatorTree *DT = nullptr);
+
+/// SplitBlockAndInsertIfThenElse is similar to SplitBlockAndInsertIfThen,
+/// but also creates the ElseBlock.
+/// Before:
+/// Head
+/// SplitBefore
+/// Tail
+/// After:
+/// Head
+/// if (Cond)
+/// ThenBlock
+/// else
+/// ElseBlock
+/// SplitBefore
+/// Tail
+void SplitBlockAndInsertIfThenElse(Value *Cond, Instruction *SplitBefore,
+ TerminatorInst **ThenTerm,
+ TerminatorInst **ElseTerm,
+ MDNode *BranchWeights = nullptr);
///
/// GetIfCondition - Check whether BB is the merge point of a if-region.
/// entered from if the condition is true, and the block that will be
/// entered if the condition is false.
Value *GetIfCondition(BasicBlock *BB, BasicBlock *&IfTrue,
- BasicBlock *&IfFalse);
+ BasicBlock *&IfFalse);
} // End llvm namespace
#endif