| Dan Gohman | ffa75cd | 2010-09-04 02:42:48 +0000 | [diff] [blame^] | 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 |