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TheRock/compiler/amd-llvm/bolt/test/X86/jt-symbol-disambiguation-4.s
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derek.holloway 7502bf64a4
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Flatten subprojects into a single base monorepo
2026-09-02 16:34:47 -07:00

64 lines
1.4 KiB
ArmAsm

## If the operand references a symbol that differs from the jump table label,
## no reference updating is required even if its target address resides within
## the jump table's range.
## In this test case, consider the second instruction within the main function,
## where the address resulting from 'c + 17' corresponds to one byte beyond the
## address of the .LJTI2_0 jump table label. However, this operand represents
## an offset calculation related to the global variable 'c' and should remain
## unaffected by the jump table.
# REQUIRES: system-linux
# RUN: llvm-mc -filetype=obj -triple x86_64-unknown-unknown %s -o %t.o
# RUN: %clang %cflags -no-pie %t.o -o %t.exe -Wl,-q
# RUN: llvm-bolt --funcs=main,foo/1 %t.exe -o %t.exe.bolt --print-normalized \
# RUN: 2>&1 | FileCheck %s
.text
.globl main
.type main,@function
main:
# CHECK: Binary Function "main
pushq %rbp
movq %rsp, %rbp
movq $-16, %rax
movl c+17(%rax), %edx
# CHECK: movl c+17(%rax), %edx
cmpl $255, %edx
je .LCorrect
movl $1, %eax
popq %rbp
ret
.LCorrect:
movl $0, %eax
popq %rbp
ret
.p2align 4, 0x90
.type foo,@function
foo:
# CHECK: Binary Function "foo
movq $0, %rax
jmpq *.LJTI2_0(,%rax,8)
# CHECK: jmpq *{{.*}} # JUMPTABLE
addl $-36, %eax
.LBB2_2:
addl $-16, %eax
retq
.section .rodata,"a",@progbits
.type c,@object
.data
.globl c
.p2align 4, 0x0
c:
.byte 1
.byte 0xff
.zero 14
.size c, 16
.LJTI2_0:
.quad .LBB2_2
.quad .LBB2_2
.quad .LBB2_2
.quad .LBB2_2