1 ; RUN: opt -S < %s -indvars | opt -analyze -iv-users | grep {%cmp = icmp slt i32} | grep {= \{%\\.ph,+,1\}<%for.cond>} 2 ; PR8079 3 4 ; LoopSimplify should invalidate indvars when splitting out the 5 ; inner loop. 6 7 @maxStat = external global i32 8 9 define i32 @test() nounwind { 10 entry: 11 br label %for.cond 12 13 for.cond: ; preds = %if.then5, %if.end, %entry 14 %cuts.1 = phi i32 [ 0, %entry ], [ %inc, %if.then5 ], [ %cuts.1, %if.end ] 15 %0 = phi i32 [ 0, %entry ], [ %add, %if.end ], [ %add, %if.then5 ] 16 %add = add i32 %0, 1 17 %cmp = icmp slt i32 %0, 1 18 %tmp1 = load i32* @maxStat, align 4 19 br i1 %cmp, label %for.body, label %for.cond14.preheader 20 21 for.cond14.preheader: ; preds = %for.cond 22 %cmp1726 = icmp sgt i32 %tmp1, 0 23 br i1 %cmp1726, label %for.body18, label %return 24 25 for.body: ; preds = %for.cond 26 %cmp2 = icmp sgt i32 %tmp1, 100 27 br i1 %cmp2, label %return, label %if.end 28 29 if.end: ; preds = %for.body 30 %cmp4 = icmp sgt i32 %tmp1, -1 31 br i1 %cmp4, label %if.then5, label %for.cond 32 33 if.then5: ; preds = %if.end 34 call void @foo() nounwind 35 %inc = add i32 %cuts.1, 1 36 br label %for.cond 37 38 for.body18: ; preds = %for.body18, %for.cond14.preheader 39 %i13.027 = phi i32 [ %1, %for.body18 ], [ 0, %for.cond14.preheader ] 40 call void @foo() nounwind 41 %1 = add nsw i32 %i13.027, 1 42 %tmp16 = load i32* @maxStat, align 4 43 %cmp17 = icmp slt i32 %1, %tmp16 44 br i1 %cmp17, label %for.body18, label %return 45 46 return: ; preds = %for.body18, %for.body, %for.cond14.preheader 47 ret i32 0 48 } 49 50 declare void @foo() nounwind 51
