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. 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*, 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, i32* %2, i64 %tmp. ; <i32*> [#uses=1] 30 %4 = load i32, 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 } 50
