| Dan Gohman | cebc72c | 2009-10-15 00:36:22 +0000 | [diff] [blame^] | 1 | ; RUN: llc < %s -march=x86 | grep align | count 4 |
| 2 | |
| 3 | ; TODO: Is it a good idea to align inner loops? It's hard to know without |
| 4 | ; knowing what their trip counts are, or other dynamic information. For |
| 5 | ; now, CodeGen aligns all loops. |
| Evan Cheng | c4ee366 | 2009-05-12 23:58:14 +0000 | [diff] [blame] | 6 | |
| 7 | @x = external global i32* ; <i32**> [#uses=1] |
| 8 | |
| 9 | define i32 @t(i32 %a, i32 %b) nounwind readonly ssp { |
| 10 | entry: |
| 11 | %0 = icmp eq i32 %a, 0 ; <i1> [#uses=1] |
| 12 | br i1 %0, label %bb5, label %bb.nph12 |
| 13 | |
| 14 | bb.nph12: ; preds = %entry |
| 15 | %1 = icmp eq i32 %b, 0 ; <i1> [#uses=1] |
| 16 | %2 = load i32** @x, align 8 ; <i32*> [#uses=1] |
| 17 | br i1 %1, label %bb2.preheader, label %bb2.preheader.us |
| 18 | |
| 19 | bb2.preheader.us: ; preds = %bb2.bb3_crit_edge.us, %bb.nph12 |
| 20 | %indvar18 = phi i32 [ 0, %bb.nph12 ], [ %indvar.next19, %bb2.bb3_crit_edge.us ] ; <i32> [#uses=2] |
| 21 | %sum.111.us = phi i32 [ 0, %bb.nph12 ], [ %4, %bb2.bb3_crit_edge.us ] ; <i32> [#uses=0] |
| 22 | %tmp16 = mul i32 %indvar18, %a ; <i32> [#uses=1] |
| 23 | br label %bb1.us |
| 24 | |
| 25 | bb1.us: ; preds = %bb1.us, %bb2.preheader.us |
| 26 | %indvar = phi i32 [ 0, %bb2.preheader.us ], [ %indvar.next, %bb1.us ] ; <i32> [#uses=2] |
| 27 | %tmp17 = add i32 %indvar, %tmp16 ; <i32> [#uses=1] |
| 28 | %tmp. = zext i32 %tmp17 to i64 ; <i64> [#uses=1] |
| 29 | %3 = getelementptr i32* %2, i64 %tmp. ; <i32*> [#uses=1] |
| 30 | %4 = load i32* %3, align 4 ; <i32> [#uses=2] |
| 31 | %indvar.next = add i32 %indvar, 1 ; <i32> [#uses=2] |
| 32 | %exitcond = icmp eq i32 %indvar.next, %b ; <i1> [#uses=1] |
| 33 | br i1 %exitcond, label %bb2.bb3_crit_edge.us, label %bb1.us |
| 34 | |
| 35 | bb2.bb3_crit_edge.us: ; preds = %bb1.us |
| 36 | %indvar.next19 = add i32 %indvar18, 1 ; <i32> [#uses=2] |
| 37 | %exitcond22 = icmp eq i32 %indvar.next19, %a ; <i1> [#uses=1] |
| 38 | br i1 %exitcond22, label %bb5, label %bb2.preheader.us |
| 39 | |
| 40 | bb2.preheader: ; preds = %bb2.preheader, %bb.nph12 |
| 41 | %indvar24 = phi i32 [ %indvar.next25, %bb2.preheader ], [ 0, %bb.nph12 ] ; <i32> [#uses=1] |
| 42 | %indvar.next25 = add i32 %indvar24, 1 ; <i32> [#uses=2] |
| 43 | %exitcond28 = icmp eq i32 %indvar.next25, %a ; <i1> [#uses=1] |
| 44 | br i1 %exitcond28, label %bb5, label %bb2.preheader |
| 45 | |
| 46 | bb5: ; preds = %bb2.preheader, %bb2.bb3_crit_edge.us, %entry |
| 47 | %sum.1.lcssa = phi i32 [ 0, %entry ], [ 0, %bb2.preheader ], [ %4, %bb2.bb3_crit_edge.us ] ; <i32> [#uses=1] |
| 48 | ret i32 %sum.1.lcssa |
| 49 | } |