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TheRock/compiler/amd-llvm/bolt/test/X86/tail-duplication-jt.s
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derek.holloway 7502bf64a4
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2026-09-02 16:34:47 -07:00

79 lines
1.1 KiB
ArmAsm

## 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 -no-pie %t.o -o %t.exe -Wl,-q
# RUN: llvm-bolt %t.exe -o %t.out --data %t.fdata --relocs \
# RUN: --tail-duplication=aggressive \
# 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