align-branch-necessary.s
899 Bytes
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
# RUN: llvm-mc -filetype=obj -triple x86_64 --x86-align-branch-boundary=32 --x86-align-branch=fused+jcc+indirect+call+ret %s | llvm-objdump -d --no-show-raw-insn - | FileCheck %s
# Check if no instruction crosses or is against the boundary,
# there will be no extra padding.
.text
.globl foo
.p2align 5
foo:
.p2align 5
.rept 24
int3
.endr
# CHECK: 18: js
js foo
.p2align 5
.rept 24
int3
.endr
# CHECK: 38: jmp
jmp foo
.p2align 5
.rept 24
int3
.endr
# CHECK: 58: jmpq *%rcx
jmp *%rcx
.p2align 5
.rept 24
int3
.endr
# CHECK: 78: callq
call foo
.p2align 5
.rept 27
int3
.endr
# CHECK: 9b: retq $0
ret $0
.p2align 5
.rept 21
int3
.endr
# CHECK: b5: cmpq %rax, %rbp
# CHECK: b8: je
cmp %rax, %rbp
je foo