derek.holloway
7502bf64a4
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61 lines
2.0 KiB
ArmAsm
61 lines
2.0 KiB
ArmAsm
# REQUIRES: system-linux
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# RUN: llvm-mc -filetype=obj -triple x86_64-unknown-unknown \
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# RUN: %s -o %t.o
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# RUN: link_fdata %s %t.o %t.fdata
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# RUN: link_fdata %s %t.o %t.fdata2 "FDATA2"
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# RUN: %clang %cflags %t.o -o %t.exe -Wl,-q
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# RUN: llvm-bolt %t.exe --data %t.fdata --reorder-blocks=none \
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# RUN: --print-finalized --tail-duplication=cache -o %t.out | FileCheck %s
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# RUN: llvm-bolt %t.exe --data %t.fdata2 --reorder-blocks=none \
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# RUN: --print-finalized --tail-duplication=cache -o %t.out2 \
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# RUN: | FileCheck --check-prefix="CHECK2" %s
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## A test where the tail is duplicated to eliminate an unconditional jump
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# FDATA: 1 main #.BB0_br# 1 main #.BB4# 0 100
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# FDATA: 1 main #.BB0_br# 1 main #.BB1# 0 100
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# FDATA: 1 main #.BB1_br# 1 main #.BB3# 0 50
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# FDATA: 1 main #.BB1_br# 1 main #.BB2# 0 50
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# FDATA: 1 main #.BB3_br# 1 main #.BB2# 0 50
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# CHECK: BOLT-INFO: tail duplication modified 1 ({{.*}}%) functions; duplicated 1 blocks (13 bytes) responsible for 50 dynamic executions ({{.*}}% of all block executions)
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# CHECK: BB Layout : .LBB00, .Ltmp0, .Ltmp1, .Ltmp2, .Ltmp3, .Ltmp4, .Ltmp5, .Ltail-dup0, .Ltmp6
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## A test where the tail is not duplicated due to the cache score
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# FDATA2: 1 main #.BB0_br# 1 main #.BB4# 0 100
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# FDATA2: 1 main #.BB0_br# 1 main #.BB1# 0 2
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# FDATA2: 1 main #.BB1_br# 1 main #.BB3# 0 1
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# FDATA2: 1 main #.BB1_br# 1 main #.BB2# 0 1
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# FDATA2: 1 main #.BB3_br# 1 main #.BB2# 0 1
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# 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)
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# CHECK2: BB Layout : .LBB00, .Ltmp0, .Ltmp1, .Ltmp2, .Ltmp3, .Ltmp4, .Ltmp5, .Ltmp6
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.text
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.globl main
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.type main, %function
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.size main, .Lend-main
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main:
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.BB0:
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xor %eax, %eax
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cmpl %eax, %ebx
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.BB0_br:
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je .BB4
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.BB1:
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inc %rax
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.BB1_br:
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je .BB3
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.BB2:
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inc %rax
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inc %rax
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inc %rax
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inc %rax
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retq
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.BB3:
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inc %rax
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.BB3_br:
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jmp .BB2
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.BB4:
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retq
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# For relocations against .text
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call exit
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.Lend:
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