1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
|
; RUN: llc < %s -x86-early-ifcvt -stress-early-ifcvt | FileCheck %s
target triple = "x86_64-apple-macosx10.8.0"
; CHECK: mm2
define i32 @mm2(i32* nocapture %p, i32 %n) nounwind uwtable readonly ssp {
entry:
br label %do.body
; CHECK: do.body
; Loop body has no branches before the backedge.
; CHECK-NOT: LBB
do.body:
%max.0 = phi i32 [ 0, %entry ], [ %max.1, %do.cond ]
%min.0 = phi i32 [ 0, %entry ], [ %min.1, %do.cond ]
%n.addr.0 = phi i32 [ %n, %entry ], [ %dec, %do.cond ]
%p.addr.0 = phi i32* [ %p, %entry ], [ %incdec.ptr, %do.cond ]
%incdec.ptr = getelementptr inbounds i32* %p.addr.0, i64 1
%0 = load i32* %p.addr.0, align 4
%cmp = icmp sgt i32 %0, %max.0
br i1 %cmp, label %do.cond, label %if.else
if.else:
%cmp1 = icmp slt i32 %0, %min.0
%.min.0 = select i1 %cmp1, i32 %0, i32 %min.0
br label %do.cond
do.cond:
%max.1 = phi i32 [ %0, %do.body ], [ %max.0, %if.else ]
%min.1 = phi i32 [ %min.0, %do.body ], [ %.min.0, %if.else ]
; CHECK: decl %esi
; CHECK: jne LBB
%dec = add i32 %n.addr.0, -1
%tobool = icmp eq i32 %dec, 0
br i1 %tobool, label %do.end, label %do.body
do.end:
%sub = sub nsw i32 %max.1, %min.1
ret i32 %sub
}
; CHECK: multipreds
; Deal with alternative tail predecessors
; CHECK-NOT: LBB
; CHECK: cmov
; CHECK-NOT: LBB
; CHECK: cmov
; CHECK-NOT: LBB
; CHECK: fprintf
define void @multipreds(i32 %sw) nounwind uwtable ssp {
entry:
switch i32 %sw, label %if.then29 [
i32 0, label %if.then37
i32 127, label %if.end41
]
if.then29:
br label %if.end41
if.then37:
br label %if.end41
if.end41:
%exit_status.0 = phi i32 [ 2, %if.then29 ], [ 0, %if.then37 ], [ 66, %entry ]
call void (...)* @fprintf(i32 %exit_status.0) nounwind
unreachable
}
declare void @fprintf(...) nounwind
; CHECK: BZ2_decompress
; This test case contains irreducible control flow, so MachineLoopInfo doesn't
; recognize the cycle in the CFG. This would confuse MachineTraceMetrics.
define void @BZ2_decompress(i8* %s) nounwind ssp {
entry:
switch i32 undef, label %sw.default [
i32 39, label %if.end.sw.bb2050_crit_edge
i32 36, label %sw.bb1788
i32 37, label %if.end.sw.bb1855_crit_edge
i32 40, label %sw.bb2409
i32 38, label %sw.bb1983
i32 44, label %if.end.sw.bb3058_crit_edge
]
if.end.sw.bb3058_crit_edge: ; preds = %entry
br label %save_state_and_return
if.end.sw.bb1855_crit_edge: ; preds = %entry
br label %save_state_and_return
if.end.sw.bb2050_crit_edge: ; preds = %entry
br label %sw.bb2050
sw.bb1788: ; preds = %entry
br label %save_state_and_return
sw.bb1983: ; preds = %entry
br i1 undef, label %save_state_and_return, label %if.then1990
if.then1990: ; preds = %sw.bb1983
br label %while.body2038
while.body2038: ; preds = %sw.bb2050, %if.then1990
%groupPos.8 = phi i32 [ 0, %if.then1990 ], [ %groupPos.9, %sw.bb2050 ]
br i1 undef, label %save_state_and_return, label %if.end2042
if.end2042: ; preds = %while.body2038
br i1 undef, label %if.end2048, label %while.end2104
if.end2048: ; preds = %if.end2042
%bsLive2054.pre = getelementptr inbounds i8* %s, i32 8
br label %sw.bb2050
sw.bb2050: ; preds = %if.end2048, %if.end.sw.bb2050_crit_edge
%groupPos.9 = phi i32 [ 0, %if.end.sw.bb2050_crit_edge ], [ %groupPos.8, %if.end2048 ]
%and2064 = and i32 undef, 1
br label %while.body2038
while.end2104: ; preds = %if.end2042
br i1 undef, label %save_state_and_return, label %if.end2117
if.end2117: ; preds = %while.end2104
br i1 undef, label %while.body2161.lr.ph, label %while.body2145.lr.ph
while.body2145.lr.ph: ; preds = %if.end2117
br label %save_state_and_return
while.body2161.lr.ph: ; preds = %if.end2117
br label %save_state_and_return
sw.bb2409: ; preds = %entry
br label %save_state_and_return
sw.default: ; preds = %entry
call void @BZ2_bz__AssertH__fail() nounwind
br label %save_state_and_return
save_state_and_return:
%groupPos.14 = phi i32 [ 0, %sw.default ], [ %groupPos.8, %while.body2038 ], [ %groupPos.8, %while.end2104 ], [ 0, %if.end.sw.bb3058_crit_edge ], [ 0, %if.end.sw.bb1855_crit_edge ], [ %groupPos.8, %while.body2161.lr.ph ], [ %groupPos.8, %while.body2145.lr.ph ], [ 0, %sw.bb2409 ], [ 0, %sw.bb1788 ], [ 0, %sw.bb1983 ]
store i32 %groupPos.14, i32* undef, align 4
ret void
}
declare void @BZ2_bz__AssertH__fail()
|
