rust/tests/ui/asm/x86_64/srcloc.rs

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// only-x86_64
// build-fail
// compile-flags: -Ccodegen-units=1
use std::arch::asm;
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// Checks that inline asm errors are mapped to the correct line in the source code.
fn main() {
unsafe {
asm!("invalid_instruction");
//~^ ERROR: invalid instruction mnemonic 'invalid_instruction'
asm!("
invalid_instruction
");
//~^^ ERROR: invalid instruction mnemonic 'invalid_instruction'
asm!(r#"
invalid_instruction
"#);
//~^^ ERROR: invalid instruction mnemonic 'invalid_instruction'
asm!("
mov eax, eax
invalid_instruction
mov eax, eax
");
//~^^^ ERROR: invalid instruction mnemonic 'invalid_instruction'
asm!(r#"
mov eax, eax
invalid_instruction
mov eax, eax
"#);
//~^^^ ERROR: invalid instruction mnemonic 'invalid_instruction'
asm!(concat!("invalid", "_", "instruction"));
//~^ ERROR: invalid instruction mnemonic 'invalid_instruction'
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asm!("movaps %xmm3, (%esi, 2)", options(att_syntax));
//~^ WARN: scale factor without index register is ignored
asm: Allow multiple template strings; interpret them as newline-separated Allow the `asm!` macro to accept a series of template arguments, and interpret them as if they were concatenated with a '\n' between them. This allows writing an `asm!` where each line of assembly appears in a separate template string argument. This syntax makes it possible for rustfmt to reliably format and indent each line of assembly, without risking changes to the inside of a template string. It also avoids the complexity of having the user carefully format and indent a multi-line string (including where to put the surrounding quotes), and avoids the extra indentation and lines of a call to `concat!`. For example, rewriting the second example from the [blog post on the new inline assembly syntax](https://blog.rust-lang.org/inside-rust/2020/06/08/new-inline-asm.html) using multiple template strings: ```rust fn main() { let mut bits = [0u8; 64]; for value in 0..=1024u64 { let popcnt; unsafe { asm!( " popcnt {popcnt}, {v}", "2:", " blsi rax, {v}", " jz 1f", " xor {v}, rax", " tzcnt rax, rax", " stosb", " jmp 2b", "1:", v = inout(reg) value => _, popcnt = out(reg) popcnt, out("rax") _, // scratch inout("rdi") bits.as_mut_ptr() => _, ); } println!("bits of {}: {:?}", value, &bits[0..popcnt]); } } ``` Note that all the template strings must appear before all other arguments; you cannot, for instance, provide a series of template strings intermixed with the corresponding operands. In order to get srcloc mappings right for macros that generate multi-line string literals, create one line_span for each line in the string literal, each pointing to the macro. Make `rustc_parse_format::Parser::curarg` `pub`, so that we can propagate it from one template string argument to the next.
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asm!(
"invalid_instruction",
);
//~^^ ERROR: invalid instruction mnemonic 'invalid_instruction'
asm!(
"mov eax, eax",
"invalid_instruction",
"mov eax, eax",
);
//~^^^ ERROR: invalid instruction mnemonic 'invalid_instruction'
asm!(
"mov eax, eax\n",
"invalid_instruction",
"mov eax, eax",
);
//~^^^ ERROR: invalid instruction mnemonic 'invalid_instruction'
asm!(
"mov eax, eax",
concat!("invalid", "_", "instruction"),
"mov eax, eax",
);
//~^^^ ERROR: invalid instruction mnemonic 'invalid_instruction'
asm!(
concat!("mov eax", ", ", "eax"),
concat!("invalid", "_", "instruction"),
concat!("mov eax", ", ", "eax"),
);
//~^^^ ERROR: invalid instruction mnemonic 'invalid_instruction'
// Make sure template strings get separated
asm!(
"invalid_instruction1",
"invalid_instruction2",
);
//~^^^ ERROR: invalid instruction mnemonic 'invalid_instruction1'
//~^^^ ERROR: invalid instruction mnemonic 'invalid_instruction2'
asm!(
concat!(
"invalid", "_", "instruction1", "\n",
"invalid", "_", "instruction2",
),
);
//~^^^^^ ERROR: invalid instruction mnemonic 'invalid_instruction1'
//~^^^^^^ ERROR: invalid instruction mnemonic 'invalid_instruction2'
asm!(
concat!(
"invalid", "_", "instruction1", "\n",
"invalid", "_", "instruction2",
),
concat!(
"invalid", "_", "instruction3", "\n",
"invalid", "_", "instruction4",
),
);
//~^^^^^^^^^ ERROR: invalid instruction mnemonic 'invalid_instruction1'
//~^^^^^^^^^^ ERROR: invalid instruction mnemonic 'invalid_instruction2'
//~^^^^^^^ ERROR: invalid instruction mnemonic 'invalid_instruction3'
//~^^^^^^^^ ERROR: invalid instruction mnemonic 'invalid_instruction4'
asm!(
concat!(
"invalid", "_", "instruction1", "\n",
"invalid", "_", "instruction2", "\n",
),
concat!(
"invalid", "_", "instruction3", "\n",
"invalid", "_", "instruction4", "\n",
),
);
//~^^^^^^^^^ ERROR: invalid instruction mnemonic 'invalid_instruction1'
//~^^^^^^^^^^ ERROR: invalid instruction mnemonic 'invalid_instruction2'
//~^^^^^^^ ERROR: invalid instruction mnemonic 'invalid_instruction3'
//~^^^^^^^^ ERROR: invalid instruction mnemonic 'invalid_instruction4'
asm!(
"",
"\n",
"invalid_instruction"
);
//~^^ ERROR: invalid instruction mnemonic 'invalid_instruction'
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}
}