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While moving exit condition, do not drop loop latch on the floor.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@47089 91177308-0d34-0410-b5e6-96231b3b80d8
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@ -1579,17 +1579,22 @@ void LoopIndexSplit::moveExitCondition(BasicBlock *CondBB, BasicBlock *ActiveBB,
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// destination.
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BranchInst *ExitingBR = cast<BranchInst>(ExitingBB->getTerminator());
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ExitingBR->moveBefore(CurrentBR);
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if (ExitingBR->getSuccessor(0) == ExitBB)
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BasicBlock *OrigDestBB = NULL;
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if (ExitingBR->getSuccessor(0) == ExitBB) {
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OrigDestBB = ExitingBR->getSuccessor(1);
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ExitingBR->setSuccessor(1, ActiveBB);
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else
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}
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else {
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OrigDestBB = ExitingBR->getSuccessor(0);
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ExitingBR->setSuccessor(0, ActiveBB);
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}
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// Remove split condition and current split condition branch.
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SC->eraseFromParent();
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CurrentBR->eraseFromParent();
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// Connect exiting block to split condition block.
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new BranchInst(CondBB, ExitingBB);
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// Connect exiting block to original destination.
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new BranchInst(OrigDestBB, ExitingBB);
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// Update PHINodes
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updatePHINodes(ExitBB, ExitingBB, CondBB, IV, IVAdd);
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72
test/Transforms/LoopIndexSplit/2008-02-13-LoopLatch.ll
Normal file
72
test/Transforms/LoopIndexSplit/2008-02-13-LoopLatch.ll
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@ -0,0 +1,72 @@
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; RUN: llvm-as < %s | opt -loop-index-split -disable-output
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; PR 2011
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%struct.CLAUSE_HELP = type { i32, i32, i32, i32, i32*, i32, %struct.LIST_NODE*, %struct.LIST_NODE*, i32, i32, %struct.LITERAL_HELP**, i32, i32, i32, i32 }
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%struct.LIST_NODE = type { %struct.LIST_NODE*, i8* }
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%struct.LITERAL_HELP = type { i32, i32, i32, %struct.CLAUSE_HELP*, %struct.term* }
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%struct.anon = type { %struct.LIST_NODE* }
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%struct.st = type { %struct.subst*, %struct.LIST_NODE*, %struct.LIST_NODE*, i16, i16 }
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%struct.subst = type { %struct.subst*, i32, %struct.term* }
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%struct.term = type { i32, %struct.anon, %struct.LIST_NODE*, i32, i32 }
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define fastcc %struct.LIST_NODE* @inf_HyperResolvents(%struct.CLAUSE_HELP* %Clause, %struct.subst* %Subst, %struct.LIST_NODE* %Restlits, i32 %GlobalMaxVar, %struct.LIST_NODE* %FoundMap, i32 %StrictlyMaximal, { %struct.st*, [3001 x %struct.term*], [4000 x %struct.term*], i32 }* %Index, i32* %Flags, i32* %Precedence) nounwind {
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entry:
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br i1 false, label %bb960, label %bb885
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bb885: ; preds = %entry
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ret %struct.LIST_NODE* null
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bb960: ; preds = %entry
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br i1 false, label %bb1097, label %bb1005.preheader
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bb1005.preheader: ; preds = %bb960
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ret %struct.LIST_NODE* null
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bb1097: ; preds = %bb960
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br i1 false, label %bb1269.preheader, label %bb1141.preheader
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bb1141.preheader: ; preds = %bb1097
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ret %struct.LIST_NODE* null
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bb1269.preheader: ; preds = %bb1097
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br i1 false, label %bb1318, label %bb1281
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bb1281: ; preds = %bb1269.preheader
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ret %struct.LIST_NODE* null
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bb1318: ; preds = %bb1269.preheader
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br i1 false, label %bb1459, label %bb.nph52
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bb.nph52: ; preds = %bb1318
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ret %struct.LIST_NODE* null
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bb1459: ; preds = %bb1318
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br i1 false, label %bb1553, label %bb.nph62
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bb.nph62: ; preds = %bb1459
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ret %struct.LIST_NODE* null
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bb1553: ; preds = %bb1669, %bb1459
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%j295.0.reg2mem.0 = phi i32 [ %storemerge110, %bb1669 ], [ 0, %bb1459 ] ; <i32> [#uses=2]
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br i1 false, label %bb1588, label %bb1616
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bb1588: ; preds = %bb1553
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br label %bb1616
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bb1616: ; preds = %bb1588, %bb1553
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%tmp1629 = icmp sgt i32 %j295.0.reg2mem.0, 0 ; <i1> [#uses=1]
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br i1 %tmp1629, label %bb1649, label %bb1632
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bb1632: ; preds = %bb1616
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br label %bb1669
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bb1649: ; preds = %bb1616
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br label %bb1669
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bb1669: ; preds = %bb1649, %bb1632
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%storemerge110 = add i32 %j295.0.reg2mem.0, 1 ; <i32> [#uses=2]
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%tmp1672 = icmp sgt i32 %storemerge110, 0 ; <i1> [#uses=1]
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br i1 %tmp1672, label %bb1678, label %bb1553
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bb1678: ; preds = %bb1669
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ret %struct.LIST_NODE* null
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}
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