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
|
; RUN: llc < %s -march=bpf -mcpu=v2 -verify-machineinstrs | FileCheck %s
;
; Source file:
; int b, c;
; int test() {
; int a = b;
; if (a)
; a = c;
; return a;
; }
@b = common local_unnamed_addr global i32 0, align 4
@c = common local_unnamed_addr global i32 0, align 4
; Function Attrs: norecurse nounwind readonly
define i32 @test() local_unnamed_addr #0 {
entry:
%0 = load i32, ptr @b, align 4
%tobool = icmp eq i32 %0, 0
%1 = load i32, ptr @c, align 4
%. = select i1 %tobool, i32 0, i32 %1
; CHECK: r1 = b
; CHECK: r1 = *(u32 *)(r1 + 0)
; CHECK: if r1 == 0 goto
ret i32 %.
}
attributes #0 = { norecurse nounwind readonly }
; test immediate out of 32-bit range
; Source file:
; unsigned long long
; load_word(ptr buf, unsigned long long off)
; asm("llvm.bpf.load.word");
;
; int
; foo(ptr buf)
; {
; unsigned long long sum = 0;
;
; sum += load_word(buf, 100);
; sum += load_word(buf, 104);
;
; if (sum != 0x1ffffffffULL)
; return ~0U;
;
; return 0;
;}
; Function Attrs: nounwind readonly
define i32 @foo(ptr) local_unnamed_addr #0 {
%2 = tail call i64 @llvm.bpf.load.word(ptr %0, i64 100)
%3 = tail call i64 @llvm.bpf.load.word(ptr %0, i64 104)
%4 = add i64 %3, %2
%5 = icmp ne i64 %4, 8589934591
; CHECK: r{{[0-9]+}} = 8589934591 ll
%6 = sext i1 %5 to i32
ret i32 %6
}
; Function Attrs: nounwind readonly
declare i64 @llvm.bpf.load.word(ptr, i64) #1
; Source file:
; int m, n;
; int test2() {
; int a = m;
; if (a < 6)
; a = n;
; return a;
; }
@m = common local_unnamed_addr global i32 0, align 4
@n = common local_unnamed_addr global i32 0, align 4
; Function Attrs: norecurse nounwind readonly
define i32 @test2() local_unnamed_addr #0 {
entry:
%0 = load i32, ptr @m, align 4
%cmp = icmp slt i32 %0, 6
; CHECK: if r{{[0-9]+}} s{{<|>}} 6 goto
%1 = load i32, ptr @n, align 4
%spec.select = select i1 %cmp, i32 %1, i32 %0
ret i32 %spec.select
}
attributes #0 = { norecurse nounwind readonly }
|
