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 i8* bitcast (i32 (...)* @__gxx_personality_v0 to i8*) {
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 i8* @_Znwm()
19 to label %bb5 unwind label %bb4
21 %v4 = landingpad { i8*, i32 }
25 %v5 = bitcast i8* %v3 to i32**
26 %add.ptr.i = getelementptr inbounds i32*, i32** %v5, i64 %v0
29 %v6 = phi i32** [ null, %bb2 ], [ %add.ptr.i, %bb5 ]
31 to label %bb7 unwind label %bb8
35 %v7 = landingpad { i8*, i32 }
39 resume { i8*, i32 } zeroinitializer
43 define void @h() personality i8* bitcast (i32 (...)* @__gxx_personality_v0 to i8*) {
45 invoke void @g() optsize
46 to label %bb2 unwind label %bb5
48 %arrayctor.cur = phi i8* [ undef, %bb1 ], [ %arrayctor.next, %bb3 ]
49 invoke void @g() optsize
50 to label %bb3 unwind label %bb6
52 %arrayctor.next = getelementptr inbounds i8, i8* %arrayctor.cur, i64 1
57 %tmp = landingpad { i8*, i32 }
59 invoke void @g() optsize
60 to label %bb4 unwind label %bb7
62 %tmp1 = landingpad { i8*, i32 }
64 %arraydestroy.isempty = icmp eq i8* undef, %arrayctor.cur
67 %lpad.nonloopexit = landingpad { i8*, i32 }
77 while.cond: ; preds = %while.cond, %entry
78 %c.0 = phi i16* [ undef, %entry ], [ %incdec.ptr, %while.cond ]
79 %incdec.ptr = getelementptr inbounds i16, i16* %c.0, i64 1
80 br i1 undef, label %while.cond1, label %while.cond
82 while.cond1: ; preds = %while.cond1, %while.cond
83 %c.1 = phi i16* [ %incdec.ptr5, %while.cond1 ], [ %c.0, %while.cond ]
84 %incdec.ptr5 = getelementptr inbounds i16, i16* %c.1, i64 1
85 br i1 undef, label %while.cond7, label %while.cond1
87 while.cond7: ; preds = %while.cond7, %while.cond1
88 %0 = phi i16* [ %incdec.ptr10, %while.cond7 ], [ %c.1, %while.cond1 ]
89 %incdec.ptr10 = getelementptr inbounds i16, i16* %0, i64 1
90 br i1 undef, label %while.cond12.preheader, label %while.cond7
92 while.cond12.preheader: ; preds = %while.cond7
93 br i1 undef, label %while.end16, label %while.body13.lr.ph
95 while.body13: ; preds = %if.else, %while.body13.lr.ph
96 %1 = phi i16* [ %2, %while.body13.lr.ph ], [ %incdec.ptr15, %if.else ]
97 br i1 undef, label %while.cond12.outer.loopexit, label %if.else
99 while.cond12.outer.loopexit: ; preds = %while.body13
100 br i1 undef, label %while.end16, label %while.body13.lr.ph
102 while.body13.lr.ph: ; preds = %while.cond12.outer.loopexit, %while.cond12.preheader
103 %2 = phi i16* [ %1, %while.cond12.outer.loopexit ], [ undef, %while.cond12.preheader ]
104 br label %while.body13
106 if.else: ; preds = %while.body13
107 %incdec.ptr15 = getelementptr inbounds i16, i16* %1, i64 1
108 %cmp = icmp eq i16* %incdec.ptr15, %0
109 br i1 %cmp, label %while.end16, label %while.body13
111 while.end16: ; preds = %if.else, %while.cond12.outer.loopexit, %while.cond12.preheader