53 lines
1.7 KiB
ArmAsm
53 lines
1.7 KiB
ArmAsm
# RUN: llvm-mc -mcpu=skylake -filetype=obj -triple x86_64-pc-linux-gnu %s -x86-pad-max-prefix-size=1 --x86-align-branch-boundary=32 --x86-align-branch=jmp+indirect | llvm-objdump -d - | FileCheck %s
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# RUN: llvm-mc -mcpu=skylake -filetype=obj -triple x86_64-pc-linux-gnu %s --mc-relax-all | llvm-objdump -d - | FileCheck --check-prefixes=RELAX-ALL %s
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# Exercise cases where we are allowed to increase the length of unrelaxable
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# instructions (by adding prefixes) for alignment purposes.
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# The first test checks instructions 'int3', 'push %rbp', which will be padded
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# later are unrelaxable (their encoding size is still 1 byte when
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# --mc-relax-all is passed).
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.text
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.globl labeled_unrelaxable_test
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labeled_unrelaxable_test:
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# RELAX-ALL: 0: cc int3
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# RELAX-ALL: 1: 54 pushq %rsp
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int3
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push %rsp
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# The second test is a basic test, we just check the jmp is aligned by prefix
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# padding the previous instructions.
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.text
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.globl labeled_basic_test
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labeled_basic_test:
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.p2align 5
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.rept 28
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int3
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.endr
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# CHECK: 3c: 2e cc int3
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# CHECK: 3e: 2e 54 pushq %rsp
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# CHECK: 40: eb 00 jmp
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int3
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push %rsp
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jmp foo
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foo:
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ret
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# The third test check the correctness cornercase - can't add prefixes on a
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# prefix or a instruction following by a prefix.
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.globl labeled_prefix_test
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labeled_prefix_test:
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.p2align 5
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.rept 28
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int3
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.endr
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# CHECK: 7c: 2e cc int3
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int3
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# CHECK: 7e: 3e cc int3
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DS
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int3
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# CHECK: 80: eb 00 jmp
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jmp bar
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bar:
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ret
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