bolt/test/runtime/X86/tail-duplication-constant-prop.s

   1 # REQUIRES: system-linux
   2
   3 # RUN: llvm-mc -filetype=obj -triple x86_64-unknown-unknown \
   4 # RUN:   %s -o %t.o
   5 # RUN: link_fdata %s %t.o %t.fdata
   6 # RUN: %clang %cflags %t.o -o %t.exe -Wl,-q
   7 # RUN: llvm-bolt %t.exe --data %t.fdata --reorder-blocks=ext-tsp \
   8 # RUN:    --print-finalized \
   9 # RUN:    --tail-duplication=moderate --tail-duplication-minimum-offset=1 \
  10 # RUN:    --tail-duplication-const-copy-propagation=1 -o %t.out | FileCheck %s
  11 # RUN: %t.exe; echo $?
  12 # RUN: %t.out; echo $?
  13
  14 # FDATA: 1 main 14 1 main #.BB2# 0 10
  15 # FDATA: 1 main 16 1 main #.BB2# 0 20
  16 # CHECK: BOLT-INFO: tail duplication modified 1 ({{.*}}%) functions; duplicated 1 blocks ({{.*}} bytes) responsible for {{.*}} dynamic executions ({{.*}}% of all block executions)
  17 # CHECK: BB Layout   : .LBB00, .Ltail-dup0, .Ltmp0, .Ltmp1
  18 # CHECK-NOT: mov $0x2, %rbx
  19
  20     .text
  21     .globl main
  22     .type main, %function
  23     .size main, .Lend-main
  24 main:
  25     mov $0x2, %rbx
  26     mov $0x1, %rdi
  27     inc %rdi
  28     mov %rdi, %rsi
  29     jmp .BB2
  30 .BB1:
  31     mov $0x9, %rbx
  32 .BB2:
  33     mov %rbx, %rax
  34     mov $0x5, %rbx
  35     add %rsi, %rax
  36     retq
  37 .BB3:
  38     mov $0x9, %rbx
  39 .BB4:
  40     mov $0xa, %rsi
  41     add %rbx, %rax
  42     add %rsi, %rax
  43 .BB5:
  44     retq
  45 .Lend: