| # REQUIRES: system-linux |
| |
| # RUN: llvm-mc -filetype=obj -triple x86_64-unknown-unknown \ |
| # RUN: %s -o %t.o |
| # RUN: link_fdata %s %t.o %t.fdata |
| # RUN: link_fdata %s %t.o %t.fdata2 "FDATA2" |
| # RUN: %clang %cflags %t.o -o %t.exe -Wl,-q |
| # RUN: llvm-bolt %t.exe --data %t.fdata --reorder-blocks=none \ |
| # RUN: --print-finalized --tail-duplication=cache -o %t.out | FileCheck %s |
| # RUN: llvm-bolt %t.exe --data %t.fdata2 --reorder-blocks=none \ |
| # RUN: --print-finalized --tail-duplication=cache -o %t.out2 \ |
| # RUN: | FileCheck --check-prefix="CHECK2" %s |
| |
| ## A test where the tail is duplicated to eliminate an unconditional jump |
| # FDATA: 1 main #.BB0_br# 1 main #.BB4# 0 100 |
| # FDATA: 1 main #.BB0_br# 1 main #.BB1# 0 100 |
| # FDATA: 1 main #.BB1_br# 1 main #.BB3# 0 50 |
| # FDATA: 1 main #.BB1_br# 1 main #.BB2# 0 50 |
| # FDATA: 1 main #.BB3_br# 1 main #.BB2# 0 50 |
| # CHECK: BOLT-INFO: tail duplication modified 1 ({{.*}}%) functions; duplicated 1 blocks (13 bytes) responsible for 50 dynamic executions ({{.*}}% of all block executions) |
| # CHECK: BB Layout : .LBB00, .Ltmp0, .Ltmp1, .Ltmp2, .Ltmp3, .Ltmp4, .Ltmp5, .Ltail-dup0, .Ltmp6 |
| |
| ## A test where the tail is not duplicated due to the cache score |
| # FDATA2: 1 main #.BB0_br# 1 main #.BB4# 0 100 |
| # FDATA2: 1 main #.BB0_br# 1 main #.BB1# 0 2 |
| # FDATA2: 1 main #.BB1_br# 1 main #.BB3# 0 1 |
| # FDATA2: 1 main #.BB1_br# 1 main #.BB2# 0 1 |
| # FDATA2: 1 main #.BB3_br# 1 main #.BB2# 0 1 |
| # CHECK2: BOLT-INFO: tail duplication modified 0 (0.00%) functions; duplicated 0 blocks (0 bytes) responsible for 0 dynamic executions (0.00% of all block executions) |
| # CHECK2: BB Layout : .LBB00, .Ltmp0, .Ltmp1, .Ltmp2, .Ltmp3, .Ltmp4, .Ltmp5, .Ltmp6 |
| |
| .text |
| .globl main |
| .type main, %function |
| .size main, .Lend-main |
| main: |
| .BB0: |
| xor %eax, %eax |
| cmpl %eax, %ebx |
| .BB0_br: |
| je .BB4 |
| .BB1: |
| inc %rax |
| .BB1_br: |
| je .BB3 |
| .BB2: |
| inc %rax |
| inc %rax |
| inc %rax |
| inc %rax |
| retq |
| .BB3: |
| inc %rax |
| .BB3_br: |
| jmp .BB2 |
| .BB4: |
| retq |
| # For relocations against .text |
| call exit |
| .Lend: |
