bolt/test/X86/jump-table-func-entry.s

   1 # REQUIRES: system-linux
   2
   3 ## Check that BOLT correctly processes jump table that contains function start
   4 ## as one of its entries.
   5
   6 # RUN: llvm-mc -filetype=obj -triple x86_64-unknown-unknown %s -o %t.o
   7 # RUN: %clang %cflags %t.o -o %t.exe -no-pie -Wl,-q
   8
   9 # RUN: llvm-bolt %t.exe --print-normalized --print-only=foo -o %t.out \
  10 # RUN:   |& FileCheck %s
  11
  12
  13
  14   .text
  15   .globl _start
  16   .type _start, %function
  17 _start:
  18   .cfi_startproc
  19   call foo
  20   ret
  21   .cfi_endproc
  22   .size _start, .-_start
  23
  24   .globl foo
  25   .type foo, %function
  26 foo:
  27         .cfi_startproc
  28 .LBB00:
  29           movq  0x8(%rdi), %rdi
  30           movzbl        0x1(%rdi), %eax
  31 .LBB00_br:
  32                 jmpq    *"JUMP_TABLE/foo.0"(,%rax,8)
  33 # CHECK:  jmpq {{.*}} # JUMPTABLE
  34 # CHECK-NEXT: Successors: {{.*}}, {{.*}}, {{.*}}, {{.*}}, {{.*}}
  35
  36 .Ltmp87085:
  37         xorl    %eax, %eax
  38         retq
  39
  40 .Ltmp87086:
  41         cmpb    $0x0, 0x8(%rdi)
  42         setne   %al
  43         retq
  44
  45 .Ltmp87088:
  46         movb    $0x1, %al
  47         retq
  48
  49 .Ltmp87087:
  50         movzbl  0x14(%rdi), %eax
  51         andb    $0x2, %al
  52         shrb    %al
  53         retq
  54
  55         .cfi_endproc
  56 .size foo, .-foo
  57
  58 # Jump tables
  59 .section .rodata
  60 "JUMP_TABLE/foo.0":
  61         .quad   .Ltmp87085
  62         .quad   .Ltmp87086
  63         .quad   .Ltmp87087
  64         .quad   .LBB00
  65         .quad   .Ltmp87088
  66
  67 # CHECK: Jump table {{.*}} for function foo
  68 # CHECK-NEXT: 0x{{.*}} :
  69 # CHECK-NEXT: 0x{{.*}} :
  70 # CHECK-NEXT: 0x{{.*}} :
  71 # CHECK-NEXT: 0x{{.*}} :
  72 # CHECK-NEXT: 0x{{.*}} :