derek.holloway
7502bf64a4
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61 lines
1.5 KiB
ArmAsm
61 lines
1.5 KiB
ArmAsm
## This checks that frame optimizer does not try to optimize away caller-saved
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## regs when we do not have complete aliasing info (when there is an LEA
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## instruction and the function does arithmetic with stack addresses).
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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: %clang %cflags %t.o -o %t.exe -Wl,-q -nostdlib
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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: -lite=0 -eliminate-unreachable=false | FileCheck %s
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# RUN: llvm-objdump -d %t.out --print-imm-hex | \
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# RUN: FileCheck --check-prefix CHECK-OBJDUMP %s
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.globl foo
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.type foo, %function
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foo:
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.cfi_startproc
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movq $0, (%rsi)
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ret
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.cfi_endproc
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.size foo, .-foo
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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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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 %rbp
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ret
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b:
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movq %rdi, %r13
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movq %r13, -0x08(%rbp)
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leaq -0x08(%rbp), %rsi
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callq foo
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movq -0x08(%rbp), %r13
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jmp c
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.cfi_endproc
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.size _start, .-_start
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# CHECK: BOLT-INFO: FOP deleted 0 load(s) (dyn count: 0) and 0 store(s)
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# CHECK-OBJDUMP: <_start>:
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# CHECK-OBJDUMP: movq %rdi, %r13
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# CHECK-OBJDUMP-NEXT: movq %r13, -0x8(%rbp)
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# CHECK-OBJDUMP-NEXT: leaq
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# CHECK-OBJDUMP-NEXT: callq
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# CHECK-OBJDUMP-NEXT: movq -0x8(%rbp), %r13
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