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Nick Lewycky's patch.
While hosting instruction check PHI node. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@57025 91177308-0d34-0410-b5e6-96231b3b80d8
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@ -1051,7 +1051,7 @@ static bool SpeculativelyExecuteBB(BranchInst *BI, BasicBlock *BB1) {
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BasicBlock::iterator InsertPos = BI;
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if (InsertPos != BIParent->begin())
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--InsertPos;
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if (InsertPos == BrCond) {
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if (InsertPos == BrCond && !isa<PHINode>(BrCond)) {
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SmallPtrSet<Instruction *, 4> BB1Insns;
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for(BasicBlock::iterator BB1I = BB1->begin(), BB1E = BB1->end();
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BB1I != BB1E; ++BB1I)
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@ -0,0 +1,36 @@
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; RUN: llvm-as < %s | opt -simplifycfg
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; PR2855
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define i32 @_Z1fPii(i32* %b, i32 %f) nounwind {
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entry:
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br label %bb
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bb: ; preds = %bb9, %bb7, %bb, %entry
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%__c2.2 = phi i32 [ undef, %entry ], [ %__c2.1, %bb7 ], [ %__c2.1, %bb9 ] ; <i32> [#uses=2]
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%s.0 = phi i32 [ 0, %entry ], [ 0, %bb7 ], [ %2, %bb9 ] ; <i32> [#uses=1]
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br label %bb1
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bb1: ; preds = %bb
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%0 = icmp slt i32 0, %f ; <i1> [#uses=1]
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br i1 %0, label %bb3, label %bb6
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bb3: ; preds = %bb1
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%1 = icmp eq i32 0, 0 ; <i1> [#uses=1]
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br i1 %1, label %bb6, label %bb5
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bb5: ; preds = %bb3
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br label %bb7
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bb6: ; preds = %bb3, %bb1
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%__c2.0 = phi i32 [ 0, %bb3 ], [ %__c2.2, %bb1 ] ; <i32> [#uses=1]
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br label %bb7
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bb7: ; preds = %bb6, %bb5
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%__c2.1 = phi i32 [ 0, %bb5 ], [ %__c2.0, %bb6 ] ; <i32> [#uses=2]
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%iftmp.1.0 = phi i1 [ false, %bb5 ], [ true, %bb6 ] ; <i1> [#uses=1]
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br i1 %iftmp.1.0, label %bb, label %bb9
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bb9: ; preds = %bb7
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%2 = add i32 %s.0, 2 ; <i32> [#uses=1]
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br label %bb
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}
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