| ; RUN: opt -S < %s -indvars | opt -analyze -iv-users | grep {%cmp = icmp slt i32} | grep {= \{%\\.ph,+,1\}<%for.cond>} |
| ; PR8079 |
| |
| ; LoopSimplify should invalidate indvars when splitting out the |
| ; inner loop. |
| |
| @maxStat = external global i32 |
| |
| define i32 @test() nounwind { |
| entry: |
| br label %for.cond |
| |
| for.cond: ; preds = %if.then5, %if.end, %entry |
| %cuts.1 = phi i32 [ 0, %entry ], [ %inc, %if.then5 ], [ %cuts.1, %if.end ] |
| %0 = phi i32 [ 0, %entry ], [ %add, %if.end ], [ %add, %if.then5 ] |
| %add = add i32 %0, 1 |
| %cmp = icmp slt i32 %0, 1 |
| %tmp1 = load i32* @maxStat, align 4 |
| br i1 %cmp, label %for.body, label %for.cond14.preheader |
| |
| for.cond14.preheader: ; preds = %for.cond |
| %cmp1726 = icmp sgt i32 %tmp1, 0 |
| br i1 %cmp1726, label %for.body18, label %return |
| |
| for.body: ; preds = %for.cond |
| %cmp2 = icmp sgt i32 %tmp1, 100 |
| br i1 %cmp2, label %return, label %if.end |
| |
| if.end: ; preds = %for.body |
| %cmp4 = icmp sgt i32 %tmp1, -1 |
| br i1 %cmp4, label %if.then5, label %for.cond |
| |
| if.then5: ; preds = %if.end |
| call void @foo() nounwind |
| %inc = add i32 %cuts.1, 1 |
| br label %for.cond |
| |
| for.body18: ; preds = %for.body18, %for.cond14.preheader |
| %i13.027 = phi i32 [ %1, %for.body18 ], [ 0, %for.cond14.preheader ] |
| call void @foo() nounwind |
| %1 = add nsw i32 %i13.027, 1 |
| %tmp16 = load i32* @maxStat, align 4 |
| %cmp17 = icmp slt i32 %1, %tmp16 |
| br i1 %cmp17, label %for.body18, label %return |
| |
| return: ; preds = %for.body18, %for.body, %for.cond14.preheader |
| ret i32 0 |
| } |
| |
| declare void @foo() nounwind |
