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
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
|
; RUN: opt -indvars -S < %s | FileCheck %s
target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-n8:16:32:64"
@main.flags = internal global [8193 x i8] zeroinitializer, align 1 ; <[8193 x i8]*> [#uses=5]
@.str = private constant [11 x i8] c"Count: %d\0A\00" ; <[11 x i8]*> [#uses=1]
; Indvars shouldn't emit a udiv here, because there's no udiv in the
; original code. This comes from SingleSource/Benchmarks/Shootout/sieve.c.
; CHECK: @main
; CHECK-NOT: div
define i32 @main(i32 %argc, i8** nocapture %argv) nounwind {
entry:
%cmp = icmp eq i32 %argc, 2 ; <i1> [#uses=1]
br i1 %cmp, label %cond.true, label %while.cond.preheader
cond.true: ; preds = %entry
%arrayidx = getelementptr inbounds i8** %argv, i64 1 ; <i8**> [#uses=1]
%tmp2 = load i8** %arrayidx ; <i8*> [#uses=1]
%call = tail call i32 @atoi(i8* %tmp2) nounwind readonly ; <i32> [#uses=1]
br label %while.cond.preheader
while.cond.preheader: ; preds = %entry, %cond.true
%NUM.0.ph = phi i32 [ %call, %cond.true ], [ 170000, %entry ] ; <i32> [#uses=2]
%tobool18 = icmp eq i32 %NUM.0.ph, 0 ; <i1> [#uses=1]
br i1 %tobool18, label %while.end, label %bb.nph30
while.cond.loopexit: ; preds = %for.cond12.while.cond.loopexit_crit_edge, %for.cond12.loopexit
%count.2.lcssa = phi i32 [ %count.1.lcssa, %for.cond12.while.cond.loopexit_crit_edge ], [ 0, %for.cond12.loopexit ] ; <i32> [#uses=1]
br label %while.cond
while.cond: ; preds = %while.cond.loopexit
%tobool = icmp eq i32 %dec19, 0 ; <i1> [#uses=1]
br i1 %tobool, label %while.cond.while.end_crit_edge, label %for.cond.preheader
while.cond.while.end_crit_edge: ; preds = %while.cond
%count.2.lcssa.lcssa = phi i32 [ %count.2.lcssa, %while.cond ] ; <i32> [#uses=1]
br label %while.end
bb.nph30: ; preds = %while.cond.preheader
br label %for.cond.preheader
for.cond.preheader: ; preds = %bb.nph30, %while.cond
%dec19.in = phi i32 [ %NUM.0.ph, %bb.nph30 ], [ %dec19, %while.cond ] ; <i32> [#uses=1]
%dec19 = add i32 %dec19.in, -1 ; <i32> [#uses=2]
br i1 true, label %bb.nph, label %for.cond12.loopexit
for.cond: ; preds = %for.body
%cmp8 = icmp slt i64 %inc, 8193 ; <i1> [#uses=1]
br i1 %cmp8, label %for.body, label %for.cond.for.cond12.loopexit_crit_edge
for.cond.for.cond12.loopexit_crit_edge: ; preds = %for.cond
br label %for.cond12.loopexit
bb.nph: ; preds = %for.cond.preheader
br label %for.body
for.body: ; preds = %bb.nph, %for.cond
%i.02 = phi i64 [ 2, %bb.nph ], [ %inc, %for.cond ] ; <i64> [#uses=2]
%arrayidx10 = getelementptr inbounds [8193 x i8]* @main.flags, i64 0, i64 %i.02 ; <i8*> [#uses=1]
store i8 1, i8* %arrayidx10
%inc = add nsw i64 %i.02, 1 ; <i64> [#uses=2]
br label %for.cond
for.cond12.loopexit: ; preds = %for.cond.for.cond12.loopexit_crit_edge, %for.cond.preheader
br i1 true, label %bb.nph16, label %while.cond.loopexit
for.cond12: ; preds = %for.inc35
%cmp14 = icmp slt i64 %inc37, 8193 ; <i1> [#uses=1]
br i1 %cmp14, label %for.body15, label %for.cond12.while.cond.loopexit_crit_edge
for.cond12.while.cond.loopexit_crit_edge: ; preds = %for.cond12
%count.1.lcssa = phi i32 [ %count.1, %for.cond12 ] ; <i32> [#uses=1]
br label %while.cond.loopexit
bb.nph16: ; preds = %for.cond12.loopexit
br label %for.body15
for.body15: ; preds = %bb.nph16, %for.cond12
%count.212 = phi i32 [ 0, %bb.nph16 ], [ %count.1, %for.cond12 ] ; <i32> [#uses=2]
%i.17 = phi i64 [ 2, %bb.nph16 ], [ %inc37, %for.cond12 ] ; <i64> [#uses=4]
%arrayidx17 = getelementptr inbounds [8193 x i8]* @main.flags, i64 0, i64 %i.17 ; <i8*> [#uses=1]
%tmp18 = load i8* %arrayidx17 ; <i8> [#uses=1]
%tobool19 = icmp eq i8 %tmp18, 0 ; <i1> [#uses=1]
br i1 %tobool19, label %for.inc35, label %if.then
if.then: ; preds = %for.body15
%add = shl i64 %i.17, 1 ; <i64> [#uses=2]
%cmp243 = icmp slt i64 %add, 8193 ; <i1> [#uses=1]
br i1 %cmp243, label %bb.nph5, label %for.end32
for.cond22: ; preds = %for.body25
%cmp24 = icmp slt i64 %add31, 8193 ; <i1> [#uses=1]
br i1 %cmp24, label %for.body25, label %for.cond22.for.end32_crit_edge
for.cond22.for.end32_crit_edge: ; preds = %for.cond22
br label %for.end32
bb.nph5: ; preds = %if.then
br label %for.body25
for.body25: ; preds = %bb.nph5, %for.cond22
%k.04 = phi i64 [ %add, %bb.nph5 ], [ %add31, %for.cond22 ] ; <i64> [#uses=2]
%arrayidx27 = getelementptr inbounds [8193 x i8]* @main.flags, i64 0, i64 %k.04 ; <i8*> [#uses=1]
store i8 0, i8* %arrayidx27
%add31 = add nsw i64 %k.04, %i.17 ; <i64> [#uses=2]
br label %for.cond22
for.end32: ; preds = %for.cond22.for.end32_crit_edge, %if.then
%inc34 = add nsw i32 %count.212, 1 ; <i32> [#uses=1]
br label %for.inc35
for.inc35: ; preds = %for.body15, %for.end32
%count.1 = phi i32 [ %inc34, %for.end32 ], [ %count.212, %for.body15 ] ; <i32> [#uses=2]
%inc37 = add nsw i64 %i.17, 1 ; <i64> [#uses=2]
br label %for.cond12
while.end: ; preds = %while.cond.while.end_crit_edge, %while.cond.preheader
%count.0.lcssa = phi i32 [ %count.2.lcssa.lcssa, %while.cond.while.end_crit_edge ], [ 0, %while.cond.preheader ] ; <i32> [#uses=1]
%call40 = tail call i32 (i8*, ...)* @printf(i8* getelementptr inbounds ([11 x i8]* @.str, i64 0, i64 0), i32 %count.0.lcssa) nounwind ; <i32> [#uses=0]
ret i32 0
}
declare i32 @atoi(i8* nocapture) nounwind readonly
declare i32 @printf(i8* nocapture, ...) nounwind
; IndVars shouldn't be afraid to emit a udiv here, since there's a udiv in
; the original code.
; CHECK: @foo
; CHECK: for.body.preheader:
; CHECK-NEXT: udiv
define void @foo(double* %p, i64 %n) nounwind {
entry:
%div0 = udiv i64 %n, 7 ; <i64> [#uses=1]
%div1 = add i64 %div0, 1
%cmp2 = icmp ult i64 0, %div1 ; <i1> [#uses=1]
br i1 %cmp2, label %for.body.preheader, label %for.end
for.body.preheader: ; preds = %entry
br label %for.body
for.body: ; preds = %for.body.preheader, %for.body
%i.03 = phi i64 [ %inc, %for.body ], [ 0, %for.body.preheader ] ; <i64> [#uses=2]
%arrayidx = getelementptr inbounds double* %p, i64 %i.03 ; <double*> [#uses=1]
store double 0.000000e+00, double* %arrayidx
%inc = add i64 %i.03, 1 ; <i64> [#uses=2]
%divx = udiv i64 %n, 7 ; <i64> [#uses=1]
%div = add i64 %divx, 1
%cmp = icmp ult i64 %inc, %div ; <i1> [#uses=1]
br i1 %cmp, label %for.body, label %for.end.loopexit
for.end.loopexit: ; preds = %for.body
br label %for.end
for.end: ; preds = %for.end.loopexit, %entry
ret void
}
|
