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## This reproduces a bug with jump table identification where jump table has
## entries pointing to code in function and its cold fragment.
# REQUIRES: system-linux
# RUN: llvm-mc -filetype=obj -triple x86_64-unknown-unknown %s -o %t.o
# RUN: llvm-strip --strip-unneeded %t.o
# RUN: %clang %cflags %t.o -o %t.exe -Wl,-q
# RUN: llvm-bolt %t.exe -o %t.out --lite=0 -v=1 --print-cfg --print-only=main \
# RUN: 2>&1 | FileCheck %s
# CHECK-NOT: unclaimed PC-relative relocations left in data
# CHECK: BOLT-INFO: marking main.cold.1 as a fragment of main
.text
.globl main
.type main, %function
.p2align 2
main:
LBB0:
andl $0xf, %ecx
cmpb $0x4, %cl
# exit through abort in main.cold.1, registers cold fragment the regular way
ja main.cold.1
# jump table dispatch, jumping to label indexed by val in %ecx
LBB1:
leaq JUMP_TABLE(%rip), %r8
movzbl %cl, %ecx
movslq (%r8,%rcx,4), %rax
addq %rax, %r8
jmpq *%r8
LBB2:
xorq %rax, %rax
LBB3:
addq $0x8, %rsp
ret
.size main, .-main
# Insert padding between functions, so that the next instruction cannot be
# treated as __builtin_unreachable destination for the jump table.
.quad 0
.globl main.cold.1
.type main.cold.1, %function
.p2align 2
main.cold.1:
LBB4:
callq abort
.size main.cold.1, .-main.cold.1
.rodata
# jmp table, entries must be R_X86_64_PC32 relocs
.globl JUMP_TABLE
JUMP_TABLE:
.long LBB2-JUMP_TABLE
.long LBB3-JUMP_TABLE
.long LBB4-JUMP_TABLE
.long LBB3-JUMP_TABLE
## Verify that the entry corresponding to the cold fragment was added to
## the jump table.
# CHECK: PIC Jump table
# CHECK-NEXT: 0x{{.*}} :
# CHECK-NEXT: 0x{{.*}} :
# CHECK-NEXT: 0x{{.*}} : main.cold.1
# CHECK-NEXT: 0x{{.*}} :
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