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1; RUN: llc < %s
2; Infinite loop in the dag combiner, reduced from 176.gcc.
3%struct._obstack_chunk = type { i8*, %struct._obstack_chunk*, [4 x i8] }
4	%struct.anon = type { i32 }
5	%struct.lang_decl = type opaque
6	%struct.lang_type = type { i32, [1 x %struct.tree_node*] }
7	%struct.obstack = type { i32, %struct._obstack_chunk*, i8*, i8*, i8*, i32, i32, %struct._obstack_chunk* (...)*, void (...)*, i8*, i8 }
8	%struct.rtx_def = type { i16, i8, i8, [1 x %struct.anon] }
9	%struct.tree_common = type { %struct.tree_node*, %struct.tree_node*, i8, i8, i8, i8 }
10	%struct.tree_decl = type { [12 x i8], i8*, i32, %struct.tree_node*, i32, i8, i8, i8, i8, %struct.tree_node*, %struct.tree_node*, %struct.tree_node*, %struct.tree_node*, %struct.tree_node*, %struct.tree_node*, %struct.tree_node*, %struct.tree_node*, %struct.tree_node*, %struct.rtx_def*, %struct.anon, { %struct.rtx_def* }, %struct.tree_node*, %struct.lang_decl* }
11	%struct.tree_list = type { [12 x i8], %struct.tree_node*, %struct.tree_node* }
12	%struct.tree_node = type { %struct.tree_decl }
13	%struct.tree_type = type { [12 x i8], %struct.tree_node*, %struct.tree_node*, %struct.tree_node*, i32, i8, i8, i8, i8, i32, %struct.tree_node*, %struct.tree_node*, %struct.anon, %struct.tree_node*, %struct.tree_node*, %struct.tree_node*, %struct.tree_node*, %struct.tree_node*, %struct.tree_node*, %struct.tree_node*, %struct.tree_node*, %struct.obstack*, %struct.lang_type* }
14@void_type_node = external global %struct.tree_node*		; <%struct.tree_node**> [#uses=1]
15@char_type_node = external global %struct.tree_node*		; <%struct.tree_node**> [#uses=1]
16@short_integer_type_node = external global %struct.tree_node*		; <%struct.tree_node**> [#uses=1]
17@short_unsigned_type_node = external global %struct.tree_node*		; <%struct.tree_node**> [#uses=1]
18@float_type_node = external global %struct.tree_node*		; <%struct.tree_node**> [#uses=1]
19@signed_char_type_node = external global %struct.tree_node*		; <%struct.tree_node**> [#uses=1]
20@unsigned_char_type_node = external global %struct.tree_node*		; <%struct.tree_node**> [#uses=1]
21
22define fastcc i32 @self_promoting_args_p(%struct.tree_node* %parms) {
23entry:
24	%tmp915 = icmp eq %struct.tree_node* %parms, null		; <i1> [#uses=1]
25	br i1 %tmp915, label %return, label %cond_true92.preheader
26
27cond_true:		; preds = %cond_true92
28	%tmp9.not = icmp ne %struct.tree_node* %tmp2, %tmp7		; <i1> [#uses=1]
29	%tmp14 = icmp eq %struct.tree_node* %tmp2, null		; <i1> [#uses=1]
30	%bothcond = or i1 %tmp9.not, %tmp14		; <i1> [#uses=1]
31	br i1 %bothcond, label %return, label %cond_next18
32
33cond_next12:		; preds = %cond_true92
34	%tmp14.old = icmp eq %struct.tree_node* %tmp2, null		; <i1> [#uses=1]
35	br i1 %tmp14.old, label %return, label %cond_next18
36
37cond_next18:		; preds = %cond_next12, %cond_true
38	%tmp20 = bitcast %struct.tree_node* %tmp2 to %struct.tree_type*		; <%struct.tree_type*> [#uses=1]
39	%tmp21 = getelementptr %struct.tree_type, %struct.tree_type* %tmp20, i32 0, i32 17		; <%struct.tree_node**> [#uses=1]
40	%tmp22 = load %struct.tree_node*, %struct.tree_node** %tmp21		; <%struct.tree_node*> [#uses=6]
41	%tmp24 = icmp eq %struct.tree_node* %tmp22, %tmp23		; <i1> [#uses=1]
42	br i1 %tmp24, label %return, label %cond_next28
43
44cond_next28:		; preds = %cond_next18
45	%tmp30 = bitcast %struct.tree_node* %tmp2 to %struct.tree_common*		; <%struct.tree_common*> [#uses=1]
46	%tmp = getelementptr %struct.tree_common, %struct.tree_common* %tmp30, i32 0, i32 2		; <i8*> [#uses=1]
47	%tmp.upgrd.1 = bitcast i8* %tmp to i32*		; <i32*> [#uses=1]
48	%tmp.upgrd.2 = load i32, i32* %tmp.upgrd.1		; <i32> [#uses=1]
49	%tmp32 = trunc i32 %tmp.upgrd.2 to i8		; <i8> [#uses=1]
50	%tmp33 = icmp eq i8 %tmp32, 7		; <i1> [#uses=1]
51	br i1 %tmp33, label %cond_true34, label %cond_next84
52
53cond_true34:		; preds = %cond_next28
54	%tmp40 = icmp eq %struct.tree_node* %tmp22, %tmp39		; <i1> [#uses=1]
55	%tmp49 = icmp eq %struct.tree_node* %tmp22, %tmp48		; <i1> [#uses=1]
56	%bothcond6 = or i1 %tmp40, %tmp49		; <i1> [#uses=1]
57	%tmp58 = icmp eq %struct.tree_node* %tmp22, %tmp57		; <i1> [#uses=1]
58	%bothcond7 = or i1 %bothcond6, %tmp58		; <i1> [#uses=1]
59	%tmp67 = icmp eq %struct.tree_node* %tmp22, %tmp66		; <i1> [#uses=1]
60	%bothcond8 = or i1 %bothcond7, %tmp67		; <i1> [#uses=1]
61	%tmp76 = icmp eq %struct.tree_node* %tmp22, %tmp75		; <i1> [#uses=1]
62	%bothcond9 = or i1 %bothcond8, %tmp76		; <i1> [#uses=2]
63	%brmerge = or i1 %bothcond9, %tmp.upgrd.6		; <i1> [#uses=1]
64	%bothcond9.upgrd.3 = zext i1 %bothcond9 to i32		; <i32> [#uses=1]
65	%.mux = xor i32 %bothcond9.upgrd.3, 1		; <i32> [#uses=1]
66	br i1 %brmerge, label %return, label %cond_true92
67
68cond_next84:		; preds = %cond_next28
69	br i1 %tmp.upgrd.6, label %return, label %cond_true92
70
71cond_true92.preheader:		; preds = %entry
72	%tmp7 = load %struct.tree_node*, %struct.tree_node** @void_type_node		; <%struct.tree_node*> [#uses=1]
73	%tmp23 = load %struct.tree_node*, %struct.tree_node** @float_type_node		; <%struct.tree_node*> [#uses=1]
74	%tmp39 = load %struct.tree_node*, %struct.tree_node** @char_type_node		; <%struct.tree_node*> [#uses=1]
75	%tmp48 = load %struct.tree_node*, %struct.tree_node** @signed_char_type_node		; <%struct.tree_node*> [#uses=1]
76	%tmp57 = load %struct.tree_node*, %struct.tree_node** @unsigned_char_type_node		; <%struct.tree_node*> [#uses=1]
77	%tmp66 = load %struct.tree_node*, %struct.tree_node** @short_integer_type_node		; <%struct.tree_node*> [#uses=1]
78	%tmp75 = load %struct.tree_node*, %struct.tree_node** @short_unsigned_type_node		; <%struct.tree_node*> [#uses=1]
79	br label %cond_true92
80
81cond_true92:		; preds = %cond_true92.preheader, %cond_next84, %cond_true34
82	%t.0.0 = phi %struct.tree_node* [ %parms, %cond_true92.preheader ], [ %tmp6, %cond_true34 ], [ %tmp6, %cond_next84 ]		; <%struct.tree_node*> [#uses=2]
83	%tmp.upgrd.4 = bitcast %struct.tree_node* %t.0.0 to %struct.tree_list*		; <%struct.tree_list*> [#uses=1]
84	%tmp.upgrd.5 = getelementptr %struct.tree_list, %struct.tree_list* %tmp.upgrd.4, i32 0, i32 2		; <%struct.tree_node**> [#uses=1]
85	%tmp2 = load %struct.tree_node*, %struct.tree_node** %tmp.upgrd.5		; <%struct.tree_node*> [#uses=5]
86	%tmp4 = bitcast %struct.tree_node* %t.0.0 to %struct.tree_common*		; <%struct.tree_common*> [#uses=1]
87	%tmp5 = getelementptr %struct.tree_common, %struct.tree_common* %tmp4, i32 0, i32 0		; <%struct.tree_node**> [#uses=1]
88	%tmp6 = load %struct.tree_node*, %struct.tree_node** %tmp5		; <%struct.tree_node*> [#uses=3]
89	%tmp.upgrd.6 = icmp eq %struct.tree_node* %tmp6, null		; <i1> [#uses=3]
90	br i1 %tmp.upgrd.6, label %cond_true, label %cond_next12
91
92return:		; preds = %cond_next84, %cond_true34, %cond_next18, %cond_next12, %cond_true, %entry
93	%retval.0 = phi i32 [ 1, %entry ], [ 1, %cond_next84 ], [ %.mux, %cond_true34 ], [ 0, %cond_next18 ], [ 0, %cond_next12 ], [ 0, %cond_true ]		; <i32> [#uses=1]
94	ret i32 %retval.0
95}
96