derek.holloway
7502bf64a4
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65 lines
1.5 KiB
ArmAsm
65 lines
1.5 KiB
ArmAsm
# This test case reproduces a bug where, during register swapping,
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# the code fragments associated with the function need to be swapped
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# together (which may be generated during PGO optimization). If not
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# handled properly, optimized binary execution can result in a segmentation fault.
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# REQUIRES: system-linux
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# RUN: llvm-mc -filetype=obj -triple x86_64-unknown-unknown %s -o %t.o
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# RUN: link_fdata %s %t.o %t.fdata
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# RUN: llvm-strip --strip-unneeded %t.o
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# RUN: %clang -no-pie %t.o -o %t.exe -Wl,-q
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# RUN: llvm-bolt %t.exe -o %t.out -data=%t.fdata --reg-reassign | FileCheck %s
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# RUN: %t.out
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# CHECK: BOLT-INFO: Reg Reassignment Pass Stats
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# CHECK-NEXT: 2 functions affected.
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.text
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.globl main
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.globl main.cold
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.p2align 4, 0x90
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.type main,@function
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.type main.cold,@function
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main.cold:
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bb1:
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cmp $0x3, %r12
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jne bb8
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bb2:
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jmp bb4
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main: # @main
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.cfi_startproc
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# %bb.0: # %entry
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pushq %rax
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pushq %r12
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pushq %rbx
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.cfi_def_cfa_offset 16
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mov $0x1, %r12
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mov $0x2, %rbx
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add $0x1, %r12
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shr $0x14, %r12
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mov $0x3, %r12
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bb3:
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jmp bb1
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bb4:
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cmp $0x3, %r12
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bb5:
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jne bb8
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bb6:
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xorl %eax, %eax
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bb7:
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popq %rcx
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popq %rbx
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popq %r12
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.cfi_def_cfa_offset 8
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retq
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bb8:
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mov $0x1, %rax
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jmp bb7
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# FDATA: 1 main.cold #bb2# 1 main #bb4# 0 100
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# FDATA: 1 main #bb5# 1 main #bb6# 0 100
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# FDATA: 1 main #bb3# 1 main.cold 0 0 100
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.Lfunc_end0:
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.size main, .Lfunc_end0-main
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.cfi_endproc
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