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
|
; RUN: pnacl-abicheck < %s | FileCheck %s
; Test the "align" attributes that are allowed on load and store
; instructions.
declare void @llvm.memcpy.p0i8.p0i8.i32(i8*, i8*, i32, i32, i1)
declare void @llvm.memmove.p0i8.p0i8.i32(i8*, i8*, i32, i32, i1)
declare void @llvm.memset.p0i8.i32(i8*, i8, i32, i32, i1)
define internal void @allowed_cases(i32 %ptr, float %f, double %d) {
%ptr.i32 = inttoptr i32 %ptr to i32*
load i32* %ptr.i32, align 1
store i32 123, i32* %ptr.i32, align 1
%ptr.float = inttoptr i32 %ptr to float*
load float* %ptr.float, align 1
load float* %ptr.float, align 4
store float %f, float* %ptr.float, align 1
store float %f, float* %ptr.float, align 4
%ptr.double = inttoptr i32 %ptr to double*
load double* %ptr.double, align 1
load double* %ptr.double, align 8
store double %d, double* %ptr.double, align 1
store double %d, double* %ptr.double, align 8
; memcpy() et el take an alignment parameter, which is allowed to be 1.
%ptr.p = inttoptr i32 %ptr to i8*
call void @llvm.memcpy.p0i8.p0i8.i32(i8* %ptr.p, i8* %ptr.p,
i32 10, i32 1, i1 false)
call void @llvm.memmove.p0i8.p0i8.i32(i8* %ptr.p, i8* %ptr.p,
i32 10, i32 1, i1 false)
call void @llvm.memset.p0i8.i32(i8* %ptr.p, i8 99,
i32 10, i32 1, i1 false)
ret void
}
; CHECK-NOT: disallowed
define internal void @rejected_cases(i32 %ptr, float %f, double %d, i32 %align) {
%ptr.i32 = inttoptr i32 %ptr to i32*
load i32* %ptr.i32, align 4
store i32 123, i32* %ptr.i32, align 4
; CHECK: disallowed: bad alignment: {{.*}} load i32{{.*}} align 4
; CHECK-NEXT: disallowed: bad alignment: store i32{{.*}} align 4
; Unusual, not-very-useful alignments are rejected.
%ptr.float = inttoptr i32 %ptr to float*
load float* %ptr.float, align 2
load float* %ptr.float, align 8
store float %f, float* %ptr.float, align 2
store float %f, float* %ptr.float, align 8
; CHECK-NEXT: disallowed: bad alignment: {{.*}} load float{{.*}} align 2
; CHECK-NEXT: disallowed: bad alignment: {{.*}} load float{{.*}} align 8
; CHECK-NEXT: disallowed: bad alignment: store float{{.*}} align 2
; CHECK-NEXT: disallowed: bad alignment: store float{{.*}} align 8
%ptr.double = inttoptr i32 %ptr to double*
load double* %ptr.double, align 2
load double* %ptr.double, align 4
store double %d, double* %ptr.double, align 2
store double %d, double* %ptr.double, align 4
; CHECK-NEXT: disallowed: bad alignment: {{.*}} load double{{.*}} align 2
; CHECK-NEXT: disallowed: bad alignment: {{.*}} load double{{.*}} align 4
; CHECK-NEXT: disallowed: bad alignment: store double{{.*}} align 2
; CHECK-NEXT: disallowed: bad alignment: store double{{.*}} align 4
; Non-pessimistic alignments for memcpy() et al are rejected.
%ptr.p = inttoptr i32 %ptr to i8*
call void @llvm.memcpy.p0i8.p0i8.i32(i8* %ptr.p, i8* %ptr.p,
i32 10, i32 4, i1 false)
call void @llvm.memmove.p0i8.p0i8.i32(i8* %ptr.p, i8* %ptr.p,
i32 10, i32 4, i1 false)
call void @llvm.memset.p0i8.i32(i8* %ptr.p, i8 99,
i32 10, i32 4, i1 false)
; CHECK-NEXT: bad alignment: call void @llvm.memcpy
; CHECK-NEXT: bad alignment: call void @llvm.memmove
; CHECK-NEXT: bad alignment: call void @llvm.memset
; Check that the verifier does not crash if the alignment argument
; is not a constant.
call void @llvm.memcpy.p0i8.p0i8.i32(i8* %ptr.p, i8* %ptr.p,
i32 10, i32 %align, i1 false)
call void @llvm.memmove.p0i8.p0i8.i32(i8* %ptr.p, i8* %ptr.p,
i32 10, i32 %align, i1 false)
call void @llvm.memset.p0i8.i32(i8* %ptr.p, i8 99,
i32 10, i32 %align, i1 false)
; CHECK-NEXT: bad alignment: call void @llvm.memcpy
; CHECK-NEXT: bad alignment: call void @llvm.memmove
; CHECK-NEXT: bad alignment: call void @llvm.memset
ret void
}
; CHECK-NOT: disallowed
|
