condbr_switch.ll
4.7 KB
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
163
164
165
166
167
; RUN: llc -x86-condbr-folding=true -mtriple=x86_64-linux-gnu -mcpu=sandybridge %s -o - -verify-machineinstrs | FileCheck %s --check-prefix=MERGE
; RUN: llc -x86-condbr-folding=true -mtriple=x86_64-linux-gnu -mcpu=ivybridge %s -o - -verify-machineinstrs | FileCheck %s --check-prefix=MERGE
; RUN: llc -x86-condbr-folding=true -mtriple=x86_64-linux-gnu -mcpu=haswell %s -o - -verify-machineinstrs | FileCheck %s --check-prefix=MERGE
; RUN: llc -x86-condbr-folding=true -mtriple=x86_64-linux-gnu -mcpu=broadwell %s -o - -verify-machineinstrs | FileCheck %s --check-prefix=MERGE
; RUN: llc -x86-condbr-folding=true -mtriple=x86_64-linux-gnu -mcpu=skylake %s -o - -verify-machineinstrs | FileCheck %s --check-prefix=MERGE
; RUN: llc -x86-condbr-folding=true -mtriple=x86_64-linux-gnu -mcpu=skx %s -o - -verify-machineinstrs | FileCheck %s --check-prefix=MERGE
; RUN: llc -x86-condbr-folding=true -mtriple=x86_64-linux-gnu %s -o - -verify-machineinstrs | FileCheck %s --check-prefix=NOTMERGE
@v1 = common dso_local local_unnamed_addr global i32 0, align 4
@v2 = common dso_local local_unnamed_addr global i32 0, align 4
@v3 = common dso_local local_unnamed_addr global i32 0, align 4
@v4 = common dso_local local_unnamed_addr global i32 0, align 4
@v5 = common dso_local local_unnamed_addr global i32 0, align 4
@v6 = common dso_local local_unnamed_addr global i32 0, align 4
@v7 = common dso_local local_unnamed_addr global i32 0, align 4
@v8 = common dso_local local_unnamed_addr global i32 0, align 4
@v9 = common dso_local local_unnamed_addr global i32 0, align 4
@v10 = common dso_local local_unnamed_addr global i32 0, align 4
@v11 = common dso_local local_unnamed_addr global i32 0, align 4
@v12 = common dso_local local_unnamed_addr global i32 0, align 4
@v13 = common dso_local local_unnamed_addr global i32 0, align 4
@v14 = common dso_local local_unnamed_addr global i32 0, align 4
@v15 = common dso_local local_unnamed_addr global i32 0, align 4
define dso_local i32 @fourcases(i32 %n) {
entry:
switch i32 %n, label %return [
i32 111, label %sw.bb
i32 222, label %sw.bb1
i32 3665, label %sw.bb2
i32 4444, label %sw.bb4
]
sw.bb:
%0 = load i32, i32* @v1, align 4
br label %return
sw.bb1:
%1 = load i32, i32* @v2, align 4
%add = add nsw i32 %1, 12
br label %return
sw.bb2:
%2 = load i32, i32* @v3, align 4
%add3 = add nsw i32 %2, 13
br label %return
sw.bb4:
%3 = load i32, i32* @v1, align 4
%4 = load i32, i32* @v2, align 4
%add5 = add nsw i32 %4, %3
br label %return
return:
%retval.0 = phi i32 [ %add5, %sw.bb4 ], [ %add3, %sw.bb2 ], [ %add, %sw.bb1 ], [ %0, %sw.bb ], [ 0, %entry ]
ret i32 %retval.0
}
; MERGE-LABEL: fourcases
; MERGE: cmpl $3665
; MERGE-NEXT: jg
; MERGE-NEXT: jge
; NOTMERGE: cmpl $3664
; NOTMERGE-NEXT: jg
define dso_local i32 @fifteencases(i32) {
switch i32 %0, label %32 [
i32 -111, label %2
i32 -13, label %4
i32 25, label %6
i32 37, label %8
i32 89, label %10
i32 111, label %12
i32 213, label %14
i32 271, label %16
i32 283, label %18
i32 325, label %20
i32 327, label %22
i32 429, label %24
i32 500, label %26
i32 603, label %28
i32 605, label %30
]
; <label>:2
%3 = load i32, i32* @v1, align 4
br label %32
; <label>:4
%5 = load i32, i32* @v2, align 4
br label %32
; <label>:6
%7 = load i32, i32* @v3, align 4
br label %32
; <label>:8
%9 = load i32, i32* @v4, align 4
br label %32
; <label>:10
%11 = load i32, i32* @v5, align 4
br label %32
; <label>:12
%13 = load i32, i32* @v6, align 4
br label %32
; <label>:14
%15 = load i32, i32* @v7, align 4
br label %32
; <label>:16
%17 = load i32, i32* @v8, align 4
br label %32
; <label>:18
%19 = load i32, i32* @v9, align 4
br label %32
; <label>:20
%21 = load i32, i32* @v10, align 4
br label %32
; <label>:22
%23 = load i32, i32* @v11, align 4
br label %32
; <label>:24
%25 = load i32, i32* @v12, align 4
br label %32
; <label>:26
%27 = load i32, i32* @v13, align 4
br label %32
; <label>:28:
%29 = load i32, i32* @v14, align 4
br label %32
; <label>:30:
%31 = load i32, i32* @v15, align 4
br label %32
; <label>:32:
%33 = phi i32 [ %31, %30 ], [ %29, %28 ], [ %27, %26 ], [ %25, %24 ], [ %23, %22 ], [ %21, %20 ], [ %19, %18 ], [ %17, %16 ], [ %15, %14 ], [ %13, %12 ], [ %11, %10 ], [ %9, %8 ], [ %7, %6 ], [ %5, %4 ], [ %3, %2 ], [ 0, %1 ]
ret i32 %33
}
; MERGE-LABEL: fifteencases
; MERGE: cmpl $271
; MERGE-NEXT: jg
; MERGE-NEXT: jge
; MERGE: cmpl $37
; MERGE-NEXT: jg
; MERGE-NEXT: jge
; MERGE: cmpl $429
; MERGE-NEXT: jg
; MERGE-NEXT: jge
; MERGE: cmpl $325
; MERGE-NEXT: jg
; MERGE-NEXT: jge
; MERGE: cmpl $603
; MERGE-NEXT: jg
; MERGE-NEXT: jge
; NOTMERGE-LABEL: fifteencases
; NOTMERGE: cmpl $270
; NOTMERGE-NEXT: jle