derek.holloway
7502bf64a4
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48 lines
1.4 KiB
ArmAsm
48 lines
1.4 KiB
ArmAsm
# RUN: llvm-mc -filetype=obj -triple x86_64 --x86-align-branch-boundary=32 --x86-align-branch=call+jmp+indirect+ret+jcc+fused %s | llvm-objdump -d --no-show-raw-insn - | FileCheck %s
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# This file includes cases which are problematic to apply automatic padding
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# in the assembler. These are the examples brought up in review and
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# discussion which motivate the need for a assembler directive to
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# selectively enable/disable.
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# FIXME: the checks are checking current *incorrect* behavior
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.text
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# In the first test, we have a label which is expected to be bound to the
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# start of the call. For instance, we want to associate a fault on the call
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# target with some bit of higher level sementic.
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# CHECK-LABEL: <labeled_call_test1>:
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# CHECK: 1f <label_before>:
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# CHECK: 1f: nop
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# CHECK: 20: callq
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.globl labeled_call_test1
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.p2align 5
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labeled_call_test1:
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.rept 31
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int3
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.endr
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label_before:
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callq bar
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# Our second test is like the first w/a labeled fault, but specifically to
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# a fused memory comparison. This is the form produced by implicit null
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# checks for instance.
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# CHECK-LABEL: <implicit_null_check>:
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# CHECK: 5f <fault_addr>:
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# CHECK: 5f: nop
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# CHECK: 60: cmpq
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.globl implicit_null_check
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.p2align 5
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implicit_null_check:
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.rept 31
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int3
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.endr
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fault_addr:
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cmpq (%rsi), %rdi
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jne bar
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.p2align 4
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.type bar,@function
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bar:
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retq
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