Update aosp/master LLVM for rebase to r256229

[android-x86/external-llvm.git] / include / llvm / Transforms / Utils / BasicBlockUtils.h

diff --git a/include/llvm/Transforms/Utils/BasicBlockUtils.h b/include/llvm/Transforms/Utils/BasicBlockUtils.h
index 710db03..13c856d 100644 (file)
--- a/include/llvm/Transforms/Utils/BasicBlockUtils.h
+++ b/include/llvm/Transforms/Utils/BasicBlockUtils.h
@@ -22,7 +22,6 @@
 
 namespace llvm {
 
-class AliasAnalysis;
 class MemoryDependenceAnalysis;
 class DominatorTree;
 class LoopInfo;
@@ -40,7 +39,7 @@ void DeleteDeadBlock(BasicBlock *BB);
 /// 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, AliasAnalysis *AA = nullptr,
+void FoldSingleEntryPHINodes(BasicBlock *BB,
                              MemoryDependenceAnalysis *MemDep = nullptr);
 
 /// DeleteDeadPHIs - Examine each PHI in the given block and delete it if it
@@ -54,7 +53,6 @@ bool DeleteDeadPHIs(BasicBlock *BB, const TargetLibraryInfo *TLI = nullptr);
 /// if possible.  The return value indicates success or failure.
 bool MergeBlockIntoPredecessor(BasicBlock *BB, DominatorTree *DT = nullptr,
                                LoopInfo *LI = nullptr,
-                               AliasAnalysis *AA = nullptr,
                                MemoryDependenceAnalysis *MemDep = nullptr);
 
 // ReplaceInstWithValue - Replace all uses of an instruction (specified by BI)
@@ -64,14 +62,16 @@ void ReplaceInstWithValue(BasicBlock::InstListType &BIL,
                           BasicBlock::iterator &BI, Value *V);
 
 // ReplaceInstWithInst - Replace the instruction specified by BI with the
-// instruction specified by I.  The original instruction is deleted and BI is
+// instruction specified by I. Copies DebugLoc from BI to I, if I doesn't
+// already have a DebugLoc. The original instruction is deleted and BI is
 // updated to point to the new instruction.
 //
 void ReplaceInstWithInst(BasicBlock::InstListType &BIL,
                          BasicBlock::iterator &BI, Instruction *I);
 
 // ReplaceInstWithInst - Replace the instruction specified by From with the
-// instruction specified by To.
+// instruction specified by To. Copies DebugLoc from BI to I, if I doesn't
+// already have a DebugLoc.
 //
 void ReplaceInstWithInst(Instruction *From, Instruction *To);
 
@@ -80,27 +80,15 @@ void ReplaceInstWithInst(Instruction *From, Instruction *To);
 /// This provides a builder interface for overriding the default options used
 /// during critical edge splitting.
 struct CriticalEdgeSplittingOptions {
-  AliasAnalysis *AA;
   DominatorTree *DT;
   LoopInfo *LI;
   bool MergeIdenticalEdges;
   bool DontDeleteUselessPHIs;
   bool PreserveLCSSA;
 
-  CriticalEdgeSplittingOptions()
-      : AA(nullptr), DT(nullptr), LI(nullptr), MergeIdenticalEdges(false),
-        DontDeleteUselessPHIs(false), PreserveLCSSA(false) {}
-
-  /// \brief Basic case of setting up all the analysis.
-  CriticalEdgeSplittingOptions(AliasAnalysis *AA, DominatorTree *DT = nullptr,
+  CriticalEdgeSplittingOptions(DominatorTree *DT = nullptr,
                                LoopInfo *LI = nullptr)
-      : AA(AA), DT(DT), LI(LI), MergeIdenticalEdges(false),
-        DontDeleteUselessPHIs(false), PreserveLCSSA(false) {}
-
-  /// \brief A common pattern is to preserve the dominator tree and loop
-  /// info but not care about AA.
-  CriticalEdgeSplittingOptions(DominatorTree *DT, LoopInfo *LI)
-      : AA(nullptr), DT(DT), LI(LI), MergeIdenticalEdges(false),
+      : DT(DT), LI(LI), MergeIdenticalEdges(false),
         DontDeleteUselessPHIs(false), PreserveLCSSA(false) {}
 
   CriticalEdgeSplittingOptions &setMergeIdenticalEdges() {
@@ -212,15 +200,13 @@ BasicBlock *SplitBlock(BasicBlock *Old, Instruction *SplitPt,
 /// It will have Suffix+".split_lp". See SplitLandingPadPredecessors for more
 /// details on this case.
 ///
-/// This currently updates the LLVM IR, AliasAnalysis, DominatorTree,
-/// DominanceFrontier, LoopInfo, and LCCSA but no other analyses.
-/// In particular, it does not preserve LoopSimplify (because it's
-/// complicated to handle the case where one of the edges being split
-/// is an exit of a loop with other exits).
+/// This currently updates the LLVM IR, DominatorTree, LoopInfo, and LCCSA but
+/// no other analyses. In particular, it does not preserve LoopSimplify
+/// (because it's complicated to handle the case where one of the edges being
+/// split is an exit of a loop with other exits).
 ///
 BasicBlock *SplitBlockPredecessors(BasicBlock *BB, ArrayRef<BasicBlock *> Preds,
                                    const char *Suffix,
-                                   AliasAnalysis *AA = nullptr,
                                    DominatorTree *DT = nullptr,
                                    LoopInfo *LI = nullptr,
                                    bool PreserveLCSSA = false);
@@ -232,17 +218,15 @@ BasicBlock *SplitBlockPredecessors(BasicBlock *BB, ArrayRef<BasicBlock *> Preds,
 /// OrigBB is clone into both of the new basic blocks. The new blocks are given
 /// the suffixes 'Suffix1' and 'Suffix2', and are returned in the NewBBs vector.
 ///
-/// This currently updates the LLVM IR, AliasAnalysis, DominatorTree,
-/// DominanceFrontier, LoopInfo, and LCCSA but no other analyses. In particular,
-/// it does not preserve LoopSimplify (because it's complicated to handle the
-/// case where one of the edges being split is an exit of a loop with other
-/// exits).
+/// This currently updates the LLVM IR, DominatorTree, LoopInfo, and LCCSA but
+/// no other analyses. In particular, it does not preserve LoopSimplify
+/// (because it's complicated to handle the case where one of the edges being
+/// split is an exit of a loop with other exits).
 ///
 void SplitLandingPadPredecessors(BasicBlock *OrigBB,
                                  ArrayRef<BasicBlock *> Preds,
                                  const char *Suffix, const char *Suffix2,
                                  SmallVectorImpl<BasicBlock *> &NewBBs,
-                                 AliasAnalysis *AA = nullptr,
                                  DominatorTree *DT = nullptr,
                                  LoopInfo *LI = nullptr,
                                  bool PreserveLCSSA = false);