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
|
# RUN: not llc -march=x86-64 -run-pass none -o /dev/null %s 2>&1 | FileCheck %s
--- |
define i32 @test_jumptable(i32 %in) {
entry:
switch i32 %in, label %def [
i32 0, label %lbl1
i32 1, label %lbl2
i32 2, label %lbl3
i32 3, label %lbl4
]
def:
ret i32 0
lbl1:
ret i32 1
lbl2:
ret i32 2
lbl3:
ret i32 4
lbl4:
ret i32 8
}
...
---
name: test_jumptable
jumpTable:
kind: label-difference32
entries:
- id: 0
blocks: [ '%bb.3.lbl1', '%bb.4.lbl2', '%bb.5.lbl3', '%bb.6.lbl4' ]
body: |
bb.0.entry:
successors: %bb.2.def, %bb.1.entry
$eax = MOV32rr $edi, implicit-def $rax
CMP32ri8 $edi, 3, implicit-def $eflags
JCC_1 %bb.2.def, 7, implicit $eflags
bb.1.entry:
successors: %bb.3.lbl1, %bb.4.lbl2, %bb.5.lbl3, %bb.6.lbl4
; CHECK: [[@LINE+1]]:31: use of undefined jump table '%jump-table.2'
$rcx = LEA64r $rip, 1, _, %jump-table.2, _
$rax = MOVSX64rm32 $rcx, 4, $rax, 0, _
$rax = ADD64rr $rax, $rcx, implicit-def $eflags
JMP64r $rax
bb.2.def:
$eax = MOV32r0 implicit-def $eflags
RET64 $eax
bb.3.lbl1:
$eax = MOV32ri 1
RET64 $eax
bb.4.lbl2:
$eax = MOV32ri 2
RET64 $eax
bb.5.lbl3:
$eax = MOV32ri 4
RET64 $eax
bb.6.lbl4:
$eax = MOV32ri 8
RET64 $eax
...
|
