1 ; RUN: opt %s -sccp -S | FileCheck %s
3 ; Check that lots of stuff doesn't get turned into undef.
5 define i32 @main() nounwind readnone ssp {
7 br label %control.outer.outer
9 control.outer.loopexit.us-lcssa: ; preds = %control
10 br label %control.outer.loopexit
12 control.outer.loopexit: ; preds = %control.outer.loopexit.us-lcssa.us, %control.outer.loopexit.us-lcssa
13 br label %control.outer.outer.backedge
15 control.outer.outer: ; preds = %control.outer.outer.backedge, %init
16 %switchCond.0.ph.ph = phi i32 [ 2, %init ], [ 3, %control.outer.outer.backedge ] ; <i32> [#uses=2]
17 %i.0.ph.ph = phi i32 [ undef, %init ], [ %i.0.ph.ph.be, %control.outer.outer.backedge ] ; <i32> [#uses=1]
18 %tmp4 = icmp eq i32 %i.0.ph.ph, 0 ; <i1> [#uses=1]
19 br i1 %tmp4, label %control.outer.outer.split.us, label %control.outer.outer.control.outer.outer.split_crit_edge
21 control.outer.outer.control.outer.outer.split_crit_edge: ; preds = %control.outer.outer
22 br label %control.outer
24 control.outer.outer.split.us: ; preds = %control.outer.outer
25 br label %control.outer.us
27 control.outer.us: ; preds = %bb3.us, %control.outer.outer.split.us
28 %A.0.ph.us = phi i32 [ %switchCond.0.us, %bb3.us ], [ 4, %control.outer.outer.split.us ] ; <i32> [#uses=2]
29 %switchCond.0.ph.us = phi i32 [ %A.0.ph.us, %bb3.us ], [ %switchCond.0.ph.ph, %control.outer.outer.split.us ] ; <i32> [#uses=1]
32 bb3.us: ; preds = %control.us
33 br label %control.outer.us
35 bb0.us: ; preds = %control.us
38 ; CHECK: control.us: ; preds = %bb0.us, %control.outer.us
39 ; CHECK-NEXT: %switchCond.0.us = phi i32
40 ; CHECK-NEXT: switch i32 %switchCond.0.us
41 control.us: ; preds = %bb0.us, %control.outer.us
42 %switchCond.0.us = phi i32 [ %A.0.ph.us, %bb0.us ], [ %switchCond.0.ph.us, %control.outer.us ] ; <i32> [#uses=2]
43 switch i32 %switchCond.0.us, label %control.outer.loopexit.us-lcssa.us [
45 i32 1, label %bb1.us-lcssa.us
47 i32 4, label %bb4.us-lcssa.us
50 control.outer.loopexit.us-lcssa.us: ; preds = %control.us
51 br label %control.outer.loopexit
53 bb1.us-lcssa.us: ; preds = %control.us
56 bb4.us-lcssa.us: ; preds = %control.us
59 control.outer: ; preds = %bb3, %control.outer.outer.control.outer.outer.split_crit_edge
60 %A.0.ph = phi i32 [ %nextId17, %bb3 ], [ 4, %control.outer.outer.control.outer.outer.split_crit_edge ] ; <i32> [#uses=1]
61 %switchCond.0.ph = phi i32 [ 0, %bb3 ], [ %switchCond.0.ph.ph, %control.outer.outer.control.outer.outer.split_crit_edge ] ; <i32> [#uses=1]
64 control: ; preds = %bb0, %control.outer
65 %switchCond.0 = phi i32 [ %A.0.ph, %bb0 ], [ %switchCond.0.ph, %control.outer ] ; <i32> [#uses=2]
66 switch i32 %switchCond.0, label %control.outer.loopexit.us-lcssa [
68 i32 1, label %bb1.us-lcssa
70 i32 4, label %bb4.us-lcssa
73 bb4.us-lcssa: ; preds = %control
76 bb4: ; preds = %bb4.us-lcssa, %bb4.us-lcssa.us
77 br label %control.outer.outer.backedge
79 control.outer.outer.backedge: ; preds = %bb4, %control.outer.loopexit
80 %i.0.ph.ph.be = phi i32 [ 1, %bb4 ], [ 0, %control.outer.loopexit ] ; <i32> [#uses=1]
81 br label %control.outer.outer
83 bb3: ; preds = %control
84 %nextId17 = add i32 %switchCond.0, -2 ; <i32> [#uses=1]
85 br label %control.outer
87 bb0: ; preds = %control
90 bb1.us-lcssa: ; preds = %control
93 bb1: ; preds = %bb1.us-lcssa, %bb1.us-lcssa.us