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
| ; RUN: llc < %s -march=bpfel -show-mc-encoding | FileCheck --check-prefix=CHECK-EL %s
; RUN: llc < %s -march=bpfeb -show-mc-encoding | FileCheck --check-prefix=CHECK-EB %s
; Function Attrs: nounwind uwtable
define i32 @ld_b(i64 %foo, i64* nocapture %bar, i8* %ctx, i8* %ctx2) #0 {
%1 = tail call i64 @llvm.bpf.load.byte(i8* %ctx, i64 123) #2
%2 = add i64 %1, %foo
%3 = load volatile i64, i64* %bar, align 8
%4 = add i64 %2, %3
%5 = tail call i64 @llvm.bpf.load.byte(i8* %ctx2, i64 %foo) #2
%6 = add i64 %4, %5
%7 = load volatile i64, i64* %bar, align 8
%8 = add i64 %6, %7
%9 = trunc i64 %8 to i32
ret i32 %9
; CHECK-LABEL: ld_b:
; CHECK-EL: r0 = *(u8 *)skb[123]
; CHECK-EL: r0 = *(u8 *)skb[r
; CHECK-EB: r0 = *(u8 *)skb[123]
; CHECK-EB: r0 = *(u8 *)skb[r
}
declare i64 @llvm.bpf.load.byte(i8*, i64) #1
; Function Attrs: nounwind uwtable
define i32 @ld_h(i8* %ctx, i8* %ctx2, i32 %foo) #0 {
%1 = tail call i64 @llvm.bpf.load.half(i8* %ctx, i64 123) #2
%2 = sext i32 %foo to i64
%3 = tail call i64 @llvm.bpf.load.half(i8* %ctx2, i64 %2) #2
%4 = add i64 %3, %1
%5 = trunc i64 %4 to i32
ret i32 %5
; CHECK-LABEL: ld_h:
; CHECK-EL: r0 = *(u16 *)skb[r
; CHECK-EL: r0 = *(u16 *)skb[123]
; CHECK-EB: r0 = *(u16 *)skb[r
; CHECK-EB: r0 = *(u16 *)skb[123]
}
declare i64 @llvm.bpf.load.half(i8*, i64) #1
; Function Attrs: nounwind uwtable
define i32 @ld_w(i8* %ctx, i8* %ctx2, i32 %foo) #0 {
%1 = tail call i64 @llvm.bpf.load.word(i8* %ctx, i64 123) #2
%2 = sext i32 %foo to i64
%3 = tail call i64 @llvm.bpf.load.word(i8* %ctx2, i64 %2) #2
%4 = add i64 %3, %1
%5 = trunc i64 %4 to i32
ret i32 %5
; CHECK-LABEL: ld_w:
; CHECK-EL: r0 = *(u32 *)skb[r
; CHECK-EL: r0 = *(u32 *)skb[123]
; CHECK-EB: r0 = *(u32 *)skb[r
; CHECK-EB: r0 = *(u32 *)skb[123]
}
declare i64 @llvm.bpf.load.word(i8*, i64) #1
define i32 @ld_pseudo() #0 {
entry:
%call = tail call i64 @llvm.bpf.pseudo(i64 2, i64 3)
tail call void inttoptr (i64 4 to void (i64, i32)*)(i64 %call, i32 4) #2
ret i32 0
; CHECK-LABEL: ld_pseudo:
; CHECK-EL: ld_pseudo r1, 2, 3 # encoding: [0x18,0x21,0x00,0x00,0x03,0x00,0x00,0x00
; CHECK-EB: ld_pseudo r1, 2, 3 # encoding: [0x18,0x12,0x00,0x00,0x00,0x00,0x00,0x03
}
declare i64 @llvm.bpf.pseudo(i64, i64) #2
define i32 @bswap(i64 %a, i64 %b, i64 %c) #0 {
entry:
%0 = tail call i64 @llvm.bswap.i64(i64 %a)
%conv = trunc i64 %b to i32
%1 = tail call i32 @llvm.bswap.i32(i32 %conv)
%conv1 = zext i32 %1 to i64
%add = add i64 %conv1, %0
%conv2 = trunc i64 %c to i16
%2 = tail call i16 @llvm.bswap.i16(i16 %conv2)
%conv3 = zext i16 %2 to i64
%add4 = add i64 %add, %conv3
%conv5 = trunc i64 %add4 to i32
ret i32 %conv5
; CHECK-LABEL: bswap:
; CHECK-EL: r1 = be64 r1 # encoding: [0xdc,0x01,0x00,0x00,0x40,0x00,0x00,0x00]
; CHECK-EL: r0 = be32 r0 # encoding: [0xdc,0x00,0x00,0x00,0x20,0x00,0x00,0x00]
; CHECK-EL: r0 += r1 # encoding: [0x0f,0x10,0x00,0x00,0x00,0x00,0x00,0x00]
; CHECK-EL: r3 = be16 r3 # encoding: [0xdc,0x03,0x00,0x00,0x10,0x00,0x00,0x00]
; CHECK-EL: r0 += r3 # encoding: [0x0f,0x30,0x00,0x00,0x00,0x00,0x00,0x00]
; CHECK-EB: r1 = le64 r1 # encoding: [0xd4,0x10,0x00,0x00,0x00,0x00,0x00,0x40]
; CHECK-EB: r0 = le32 r0 # encoding: [0xd4,0x00,0x00,0x00,0x00,0x00,0x00,0x20]
; CHECK-EB: r0 += r1 # encoding: [0x0f,0x01,0x00,0x00,0x00,0x00,0x00,0x00]
; CHECK-EB: r3 = le16 r3 # encoding: [0xd4,0x30,0x00,0x00,0x00,0x00,0x00,0x10]
; CHECK-EB: r0 += r3 # encoding: [0x0f,0x03,0x00,0x00,0x00,0x00,0x00,0x00]
}
declare i64 @llvm.bswap.i64(i64) #1
declare i32 @llvm.bswap.i32(i32) #1
declare i16 @llvm.bswap.i16(i16) #1
|