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
|
# This reproduces a bug in tail duplication when aggressiveCodeToDuplicate
# fails to handle a block with a jump table.
# REQUIRES: system-linux
# RUN: llvm-mc -filetype=obj -triple x86_64-unknown-unknown \
# RUN: %s -o %t.o
# RUN: link_fdata %s %t.o %t.fdata
# RUN: llvm-strip --strip-unneeded %t.o
# RUN: %clangxx %cflags %t.o -o %t.exe -Wl,-q
# RUN: llvm-bolt %t.exe -o %t.out -data %t.fdata -relocs \
# RUN: -tail-duplication=1 -tail-duplication-aggressive=1 \
# RUN: -print-cfg | FileCheck %s
# CHECK: Jump table {{.*}} for function a at {{.*}} with a total count of 3
.globl main
main:
.globl a
.type a, %function
a:
.cfi_startproc
b:
jmp c
je b
movl %esi, %edi
c:
movb 0, %cl
d:
jmp e
movq 0, %r14
f:
je d
jmp f
e:
g:
j:
movq %rbp, 0
h:
cmpl $0x41, 0
i:
jmp h
jmp i
ja o
movl %edx, 0
p:
q:
k:
jmpq *JT0(,%rcx,8)
# FDATA: 1 a #k# 1 a #l# 1 3
m:
movl 0, %esi
r:
jmpq *JT1(,%rax,8)
cmpl 1, %eax
jmp j
l:
jmp m
s:
movl 6, %ebx
ak:
jmp e
movl 0, %eax
am:
jmp p
jmp q
o:
jmp g
n:
xorl %r12d, %r12d
.cfi_endproc
.rodata
JT0:
.quad r
.quad l
.quad ak
JT1:
.quad s
.quad am
.quad n
|
