bolt/test/X86/tail-duplication-pass.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 --tail-duplication=moderate \
   9 # RUN:    --tail-duplication-minimum-offset=1 -o %t.out | FileCheck %s
  10 # RUN: llvm-bolt %t.exe --data %t.fdata --print-finalized \
  11 # RUN:    --tail-duplication=aggressive --tail-duplication-minimum-offset=1 \
  12 # RUN:    -o %t.out | FileCheck %s --check-prefix CHECK-NOLOOP
  13
  14 # FDATA: 1 main 2 1 main #.BB2# 0 10
  15 # FDATA: 1 main 4 1 main #.BB2# 0 20
  16 # CHECK: BOLT-INFO: tail duplication modified 1 ({{.*}}%) functions; duplicated 1 blocks (1 bytes) responsible for {{.*}} dynamic executions ({{.*}}% of all block executions)
  17 # CHECK: BB Layout   : .LBB00, .Ltail-dup0, .Ltmp0, .Ltmp1
  18
  19 # Check that the successor of Ltail-dup0 is .LBB00, not itself.
  20 # CHECK-NOLOOP: .Ltail-dup0 (1 instructions, align : 1)
  21 # CHECK-NOLOOP: Predecessors: .LBB00
  22 # CHECK-NOLOOP: retq
  23 # CHECK-NOLOOP: .Ltmp0 (1 instructions, align : 1)
  24
  25     .text
  26     .globl main
  27     .type main, %function
  28     .size main, .Lend-main
  29 main:
  30     xor %eax, %eax
  31     jmp .BB2
  32 .BB1:
  33     inc %rax
  34 .BB2:
  35     retq
  36 # For relocations against .text
  37     call exit
  38 .Lend: