lld/test/MachO/icf-scale.s

   1 # REQUIRES: x86
   2 # RUN: rm -rf %t*
   3
   4 # RUN: llvm-mc -filetype=obj -triple=x86_64-apple-darwin %s -o %t.o
   5 # RUN: %lld -lSystem --icf=all -o %t %t.o
   6 # RUN: llvm-objdump -d --syms %t | FileCheck %s
   7
   8 ## When ICF has fewer than 1 Ki functions to segregate into equivalence classes,
   9 ## it uses a sequential algorithm to avoid the overhead of threading.
  10 ## At 1 Ki functions or more, when threading begins to pay-off, ICF employs its
  11 ## parallel segregation algorithm. Here we generate 4 Ki functions to exercise
  12 ## the parallel algorithm. There are 4 unique function bodies, each replicated
  13 ## 1 Ki times. The resulting folded program should retain one instance for each
  14 ## of the four unique functions.
  15
  16 ## The symtab does not have a particular order. And even though we can expect
  17 ## some partial order, it is not possible to express that in FileCheck syntax.
  18 ## So just use -DAG
  19 # CHECK-LABEL: SYMBOL TABLE:
  20 # CHECK-DAG: [[#%x,G0:]] g   F __TEXT,__text _g000000
  21 # CHECK-DAG: [[#%x,G0]]  g   F __TEXT,__text _g033333
  22 # CHECK-DAG: [[#%x,G1:]] g   F __TEXT,__text _g100000
  23 # CHECK-DAG: [[#%x,G1]]  g   F __TEXT,__text _g133333
  24 # CHECK-DAG: [[#%x,G2:]] g   F __TEXT,__text _g200000
  25 # CHECK-DAG: [[#%x,G2]]  g   F __TEXT,__text _g233333
  26 # CHECK-DAG: [[#%x,G3:]] g   F __TEXT,__text _g300000
  27 # CHECK-DAG: [[#%x,G3]]  g   F __TEXT,__text _g333333
  28 ## . . . many intervening _gXXXXXX symbols
  29
  30 # CHECK-LABEL: Disassembly of section __TEXT,__text:
  31 # CHECK-DAG: [[#%x,G0]]  <_g033333>:
  32 # CHECK-DAG: [[#%x,G1]]  <_g133333>:
  33 # CHECK-DAG: [[#%x,G2]]  <_g233333>:
  34 # CHECK-DAG: [[#%x,G3]]  <_g333333>:
  35 # CHECK-NOT: [[#]]       <_g{{.*}}>:
  36
  37 .subsections_via_symbols
  38 .text
  39 .p2align 2
  40
  41 .macro gen_4 c
  42   .globl _g0\c, _g1\c, _g2\c, _g3\c
  43   _g0\c:; movl $0, %eax; ret
  44   _g1\c:; movl $1, %eax; ret
  45   _g2\c:; movl $2, %eax; ret
  46   _g3\c:; movl $3, %eax; ret
  47 .endm
  48
  49 .macro gen_16 c
  50   gen_4 0\c
  51   gen_4 1\c
  52   gen_4 2\c
  53   gen_4 3\c
  54 .endm
  55
  56 .macro gen_64 c
  57   gen_16 0\c
  58   gen_16 1\c
  59   gen_16 2\c
  60   gen_16 3\c
  61 .endm
  62
  63 .macro gen_256 c
  64   gen_64 0\c
  65   gen_64 1\c
  66   gen_64 2\c
  67   gen_64 3\c
  68 .endm
  69
  70 .macro gen_1024 c
  71   gen_256 0\c
  72   gen_256 1\c
  73   gen_256 2\c
  74   gen_256 3\c
  75 .endm
  76
  77 gen_1024 0
  78 gen_1024 1
  79 gen_1024 2
  80 gen_1024 3
  81
  82 .globl _main
  83 _main:
  84   ret