1 ; REQUIRES: asserts 2 ; RUN: opt < %s -loop-unswitch -stats -disable-output 2>&1 | FileCheck %s 3 ; PR 3170 4 5 define i32 @a(i32 %x, i32 %y) nounwind { 6 ; CHECK: 1 loop-unswitch - Number of branches unswitched 7 ; CHECK-NOT: Number of branches unswitched 8 9 entry: 10 %0 = icmp ult i32 0, %y ; <i1> [#uses=1] 11 br i1 %0, label %bb.nph, label %bb4 12 13 bb.nph: ; preds = %entry 14 %1 = icmp eq i32 %x, 0 ; <i1> [#uses=1] 15 br label %bb 16 17 bb: ; preds = %bb.nph, %bb3 18 %i.01 = phi i32 [ %3, %bb3 ], [ 0, %bb.nph ] ; <i32> [#uses=1] 19 br i1 %1, label %bb2, label %bb1 20 21 bb1: ; preds = %bb 22 %2 = tail call i32 (...) @b() nounwind ; <i32> [#uses=0] 23 br label %bb2 24 25 bb2: ; preds = %bb, %bb1 26 %3 = add i32 %i.01, 1 ; <i32> [#uses=2] 27 br label %bb3 28 29 bb3: ; preds = %bb2 30 %i.0 = phi i32 [ %3, %bb2 ] ; <i32> [#uses=1] 31 %4 = icmp ult i32 %i.0, %y ; <i1> [#uses=1] 32 br i1 %4, label %bb, label %bb3.bb4_crit_edge 33 34 bb3.bb4_crit_edge: ; preds = %bb3 35 br label %bb4 36 37 bb4: ; preds = %bb3.bb4_crit_edge, %entry 38 ret i32 0 39 } 40 41 declare i32 @b(...) 42
