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1## This reproduces a bug with jump table identification where jump table has2## entries pointing to code in function and its cold fragment.3## The fragment is only reachable through jump table.4 5# REQUIRES: system-linux6 7# RUN: llvm-mc -filetype=obj -triple x86_64-unknown-unknown %s -o %t.o8# RUN: llvm-strip --strip-unneeded %t.o9# RUN: %clang %cflags %t.o -o %t.exe -Wl,-q10# RUN: llvm-bolt %t.exe -o %t.out --lite=0 -v=1 2>&1 | FileCheck %s11 12# CHECK-NOT: unclaimed PC-relative relocations left in data13# CHECK: BOLT-INFO: marking main.cold as a fragment of main14 .text15 .globl _start16 .type _start, %function17_start:18 callq main.cold19 call exit20.size _start, .-_start21 22 .globl main.cold23 .type main.cold, %function24 .p2align 225main.cold:26LBB0:27 andl $0xf, %ecx28 cmpb $0x4, %cl29 ## exit through ret30 ja LBB331 32## jump table dispatch, jumping to label indexed by val in %ecx33LBB1:34 leaq JUMP_TABLE(%rip), %r835 movzbl %cl, %ecx36 movslq (%r8,%rcx,4), %rax37 addq %rax, %r838 jmpq *%r839 40LBB2:41 xorq %rax, %rax42LBB3:43 addq $0x8, %rsp44 ret45.size main.cold, .-main.cold46 47## main function, referenced from jump table in cold fragment48 .globl main49 .type main, %function50 .p2align 251main:52 ## load bearing nop: pad LBB4 so that it can't be treated53 ## as __builtin_unreachable by analyzeJumpTable54 nop55LBB4:56 callq abort57.size main, .-main58 59 .rodata60## jmp table, entries must be R_X86_64_PC32 relocs61 .globl JUMP_TABLE62JUMP_TABLE:63 .long LBB2-JUMP_TABLE64 .long LBB3-JUMP_TABLE65 .long LBB4-JUMP_TABLE66 .long LBB3-JUMP_TABLE67