Vendor import of llvm release_32 branch r168974 (effectively, 3.2 RC2):

http://llvm.org/svn/llvm-project/llvm/branches/release_32@168974

1 files changed, 27 insertions, 1 deletions

diff --git a/include/llvm/Transforms/Utils/BasicBlockUtils.h b/include/llvm/Transforms/Utils/BasicBlockUtils.h
index 8a939cc..b810f1a 100644
--- a/include/llvm/Transforms/Utils/BasicBlockUtils.h
+++ b/include/llvm/Transforms/Utils/BasicBlockUtils.h
@@ -25,8 +25,11 @@ namespace llvm {
 
 class AliasAnalysis;
 class Instruction;
+class MDNode;
 class Pass;
 class ReturnInst;
+class TargetLibraryInfo;
+class TerminatorInst;
 
 /// DeleteDeadBlock - Delete the specified block, which must have no
 /// predecessors.
@@ -44,7 +47,7 @@ void FoldSingleEntryPHINodes(BasicBlock *BB, Pass *P = 0);
 /// 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);
+bool DeleteDeadPHIs(BasicBlock *BB, const TargetLibraryInfo *TLI = 0);
 
 /// MergeBlockIntoPredecessor - Attempts to merge a block into its predecessor,
 /// if possible.  The return value indicates success or failure.
@@ -202,6 +205,29 @@ void SplitLandingPadPredecessors(BasicBlock *OrigBB,ArrayRef<BasicBlock*> Preds,
 ReturnInst *FoldReturnIntoUncondBranch(ReturnInst *RI, BasicBlock *BB,
                                        BasicBlock *Pred);
 
+/// SplitBlockAndInsertIfThen - Split the containing block at the
+/// specified instruction - everything before and including Cmp stays
+/// in the old basic block, and everything after Cmp is moved to a
+/// new block. The two blocks are connected by a conditional branch
+/// (with value of Cmp being the condition).
+/// Before:
+///   Head
+///   Cmp
+///   Tail
+/// After:
+///   Head
+///   Cmp
+///   if (Cmp)
+///     ThenBlock
+///   Tail
+///
+/// If Unreachable is true, then ThenBlock ends with
+/// UnreachableInst, otherwise it branches to Tail.
+/// Returns the NewBasicBlock's terminator.
+
+TerminatorInst *SplitBlockAndInsertIfThen(Instruction *Cmp,
+    bool Unreachable, MDNode *BranchWeights = 0);
+
 } // End llvm namespace
 
 #endif