forked from OSchip/llvm-project
59 lines
1.2 KiB
ArmAsm
59 lines
1.2 KiB
ArmAsm
# This checks that shrink wrapping correctly drops moving push/pops when
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# there is a MOV instruction loading the value of the stack pointer in
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# order to do pointer arithmetic with a stack address.
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# 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: llvm-strip --strip-unneeded %t.o
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# RUN: ld.lld %t.o -o %t.exe -q
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# RUN: llvm-bolt %t.exe -relocs -o %t.out -data %t.fdata \
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# RUN: -frame-opt=all -simplify-conditional-tail-calls=false \
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# RUN: -experimental-shrink-wrapping \
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# RUN: -eliminate-unreachable=false | FileCheck %s
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.globl _start
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.type _start, %function
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_start:
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.cfi_startproc
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# FDATA: 0 [unknown] 0 1 _start 0 0 1
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push %rbp
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mov %rsp, %rbp
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push %rbx
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push %r14
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subq $0x20, %rsp
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je b
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c:
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addq $0x20, %rsp
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pop %r14
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pop %rbx
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pop %rbp
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ret
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b:
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je f
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jmp *JT(,%rdi,8)
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d:
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mov %r14, %rdi
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mov %rbx, %rdi
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mov %rbp, %rdi
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sub 0x20, %rdi
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f:
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addq $0x20, %rsp
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pop %r14
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pop %rbx
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pop %rbp
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ret
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.cfi_endproc
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.size _start, .-_start
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.data
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JT:
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.quad c
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.quad d
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.quad f
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# CHECK: BOLT-INFO: Shrink wrapping moved 2 spills inserting load/stores and 0 spills inserting push/pops
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