1 ; RUN: opt -loop-reduce < %s
2 ; we used to crash on this one
5 declare i32 @__gxx_personality_v0(...)
7 define void @f() personality ptr @__gxx_personality_v0 {
11 %v0 = phi i64 [ 0, %bb0 ], [ %v1, %bb1 ]
12 %v1 = add nsw i64 %v0, 1
13 br i1 undef, label %bb2, label %bb1
15 %v2 = icmp eq i64 %v0, 0
16 br i1 %v2, label %bb6, label %bb3
18 %v3 = invoke noalias ptr @_Znwm()
19 to label %bb5 unwind label %bb4
21 %v4 = landingpad { ptr, i32 }
25 %add.ptr.i = getelementptr inbounds ptr, ptr %v3, i64 %v0
28 %v6 = phi ptr [ null, %bb2 ], [ %add.ptr.i, %bb5 ]
30 to label %bb7 unwind label %bb8
34 %v7 = landingpad { ptr, i32 }
38 resume { ptr, i32 } zeroinitializer
42 define void @h() personality ptr @__gxx_personality_v0 {
44 invoke void @g() optsize
45 to label %bb2 unwind label %bb5
47 %arrayctor.cur = phi ptr [ undef, %bb1 ], [ %arrayctor.next, %bb3 ]
48 invoke void @g() optsize
49 to label %bb3 unwind label %bb6
51 %arrayctor.next = getelementptr inbounds i8, ptr %arrayctor.cur, i64 1
56 %tmp = landingpad { ptr, i32 }
58 invoke void @g() optsize
59 to label %bb4 unwind label %bb7
61 %tmp1 = landingpad { ptr, i32 }
63 %arraydestroy.isempty = icmp eq ptr undef, %arrayctor.cur
66 %lpad.nonloopexit = landingpad { ptr, i32 }
76 while.cond: ; preds = %while.cond, %entry
77 %c.0 = phi ptr [ undef, %entry ], [ %incdec.ptr, %while.cond ]
78 %incdec.ptr = getelementptr inbounds i16, ptr %c.0, i64 1
79 br i1 undef, label %while.cond1, label %while.cond
81 while.cond1: ; preds = %while.cond1, %while.cond
82 %c.1 = phi ptr [ %incdec.ptr5, %while.cond1 ], [ %c.0, %while.cond ]
83 %incdec.ptr5 = getelementptr inbounds i16, ptr %c.1, i64 1
84 br i1 undef, label %while.cond7, label %while.cond1
86 while.cond7: ; preds = %while.cond7, %while.cond1
87 %0 = phi ptr [ %incdec.ptr10, %while.cond7 ], [ %c.1, %while.cond1 ]
88 %incdec.ptr10 = getelementptr inbounds i16, ptr %0, i64 1
89 br i1 undef, label %while.cond12.preheader, label %while.cond7
91 while.cond12.preheader: ; preds = %while.cond7
92 br i1 undef, label %while.end16, label %while.body13.lr.ph
94 while.body13: ; preds = %if.else, %while.body13.lr.ph
95 %1 = phi ptr [ %2, %while.body13.lr.ph ], [ %incdec.ptr15, %if.else ]
96 br i1 undef, label %while.cond12.outer.loopexit, label %if.else
98 while.cond12.outer.loopexit: ; preds = %while.body13
99 br i1 undef, label %while.end16, label %while.body13.lr.ph
101 while.body13.lr.ph: ; preds = %while.cond12.outer.loopexit, %while.cond12.preheader
102 %2 = phi ptr [ %1, %while.cond12.outer.loopexit ], [ undef, %while.cond12.preheader ]
103 br label %while.body13
105 if.else: ; preds = %while.body13
106 %incdec.ptr15 = getelementptr inbounds i16, ptr %1, i64 1
107 %cmp = icmp eq ptr %incdec.ptr15, %0
108 br i1 %cmp, label %while.end16, label %while.body13
110 while.end16: ; preds = %if.else, %while.cond12.outer.loopexit, %while.cond12.preheader