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
|
; RUN: opt < %s -instcombine -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"
@g1 = constant {{i32,i8},i32} {{i32,i8} { i32 -559038737, i8 186 }, i32 -889275714 }
@g2 = constant double 1.0
@g3 = constant {i64, i64} { i64 123, i64 112312312 }
; Simple load
define i32 @test1() {
%r = load i32* getelementptr ({{i32,i8},i32}* @g1, i32 0, i32 0, i32 0)
ret i32 %r
; CHECK: @test1
; CHECK: ret i32 -559038737
}
; PR3152
; Load of first 16 bits of 32-bit value.
define i16 @test2() {
%r = load i16* bitcast(i32* getelementptr ({{i32,i8},i32}* @g1, i32 0, i32 0, i32 0) to i16*)
ret i16 %r
; CHECK: @test2
; CHECK: ret i16 -16657
}
; Load of second 16 bits of 32-bit value.
define i16 @test3() {
%r = load i16* getelementptr(i16* bitcast(i32* getelementptr ({{i32,i8},i32}* @g1, i32 0, i32 0, i32 0) to i16*), i32 1)
ret i16 %r
; CHECK: @test3
; CHECK: ret i16 -8531
}
; Load of 8 bit field + tail padding.
define i16 @test4() {
%r = load i16* getelementptr(i16* bitcast(i32* getelementptr ({{i32,i8},i32}* @g1, i32 0, i32 0, i32 0) to i16*), i32 2)
ret i16 %r
; CHECK: @test4
; CHECK: ret i16 186
}
; Load of double bits.
define i64 @test6() {
%r = load i64* bitcast(double* @g2 to i64*)
ret i64 %r
; CHECK: @test6
; CHECK: ret i64 4607182418800017408
}
; Load of double bits.
define i16 @test7() {
%r = load i16* bitcast(double* @g2 to i16*)
ret i16 %r
; CHECK: @test7
; CHECK: ret i16 0
}
; Double load.
define double @test8() {
%r = load double* bitcast({{i32,i8},i32}* @g1 to double*)
ret double %r
; CHECK: @test8
; CHECK: ret double 0xBADEADBEEF
}
; i128 load.
define i128 @test9() {
%r = load i128* bitcast({i64, i64}* @g3 to i128*)
ret i128 %r
; CHECK: @test9
; CHECK: ret i128 2071796475790618158476296315
}
; vector load.
define <2 x i64> @test10() {
%r = load <2 x i64>* bitcast({i64, i64}* @g3 to <2 x i64>*)
ret <2 x i64> %r
; CHECK: @test10
; CHECK: ret <2 x i64> <i64 123, i64 112312312>
}
; PR5287
@g4 = internal constant { i8, i8 } { i8 -95, i8 8 }
define i16 @test11() nounwind {
entry:
%a = load i16* bitcast ({ i8, i8 }* @g4 to i16*)
ret i16 %a
; CHECK: @test11
; CHECK: ret i16 2209
}
; PR5551
@test12g = private constant [6 x i8] c"a\00b\00\00\00"
define i16 @test12() {
%a = load i16* getelementptr inbounds ([3 x i16]* bitcast ([6 x i8]* @test12g to [3 x i16]*), i32 0, i64 1)
ret i16 %a
; CHECK: @test12
; CHECK: ret i16 98
}
; PR5978
@g5 = constant i8 4
define i1 @test13() {
%A = load i1* bitcast (i8* @g5 to i1*)
ret i1 %A
; CHECK: @test13
; CHECK: ret i1 false
}
@g6 = constant [2 x i8*] [i8* inttoptr (i64 1 to i8*), i8* inttoptr (i64 2 to i8*)]
define i64 @test14() nounwind {
entry:
%tmp = load i64* bitcast ([2 x i8*]* @g6 to i64*)
ret i64 %tmp
; CHECK: @test14
; CHECK: ret i64 1
}
define i64 @test15() nounwind {
entry:
%tmp = load i64* bitcast (i8** getelementptr inbounds ([2 x i8*]* @g6, i32 0, i64 1) to i64*)
ret i64 %tmp
; CHECK: @test15
; CHECK: ret i64 2
}
|
