52f7a218fb
The `asm!` and `global_asm!` macros require their operands to appear strictly in the following order: - Template strings - Positional operands - Named operands - Explicit register operands - `clobber_abi` - `options` This is overly strict and can be inconvienent when building complex `asm!` statements with macros. This PR relaxes the ordering requirements as follows: - Template strings must still come before all other operands. - Positional operands must still come before named and explicit register operands. - Named and explicit register operands can be freely mixed. - `options` and `clobber_abi` can appear in any position.
127 lines
5.2 KiB
Rust
127 lines
5.2 KiB
Rust
// only-aarch64
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#![feature(asm_const)]
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use std::arch::{asm, global_asm};
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fn main() {
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let mut foo = 0;
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let mut bar = 0;
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unsafe {
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asm!();
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//~^ ERROR requires at least a template string argument
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asm!(foo);
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//~^ ERROR asm template must be a string literal
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asm!("{}" foo);
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//~^ ERROR expected token: `,`
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asm!("{}", foo);
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//~^ ERROR expected operand, clobber_abi, options, or additional template string
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asm!("{}", in foo);
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//~^ ERROR expected `(`, found `foo`
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asm!("{}", in(reg foo));
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//~^ ERROR expected `)`, found `foo`
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asm!("{}", in(reg));
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//~^ ERROR expected expression, found end of macro arguments
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asm!("{}", inout(=) foo => bar);
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//~^ ERROR expected register class or explicit register
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asm!("{}", inout(reg) foo =>);
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//~^ ERROR expected expression, found end of macro arguments
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asm!("{}", in(reg) foo => bar);
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//~^ ERROR expected one of `!`, `,`, `.`, `::`, `?`, `{`, or an operator, found `=>`
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asm!("{}", sym foo + bar);
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//~^ ERROR expected a path for argument to `sym`
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asm!("", options(foo));
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//~^ ERROR expected one of
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asm!("", options(nomem foo));
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//~^ ERROR expected one of
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asm!("", options(nomem, foo));
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//~^ ERROR expected one of
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asm!("{}", options(), const foo);
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//~^ ERROR attempt to use a non-constant value in a constant
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asm!("", clobber_abi(foo));
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//~^ ERROR expected string literal
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asm!("", clobber_abi("C" foo));
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//~^ ERROR expected one of `)` or `,`, found `foo`
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asm!("", clobber_abi("C", foo));
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//~^ ERROR expected string literal
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asm!("{}", clobber_abi("C"), const foo);
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//~^ ERROR attempt to use a non-constant value in a constant
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asm!("", options(), clobber_abi("C"));
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asm!("{}", options(), clobber_abi("C"), const foo);
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//~^ ERROR attempt to use a non-constant value in a constant
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asm!("{a}", a = const foo, a = const bar);
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//~^ ERROR duplicate argument named `a`
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//~^^ ERROR argument never used
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//~^^^ ERROR attempt to use a non-constant value in a constant
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//~^^^^ ERROR attempt to use a non-constant value in a constant
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asm!("", a = in("x0") foo);
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//~^ ERROR explicit register arguments cannot have names
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asm!("{a}", in("x0") foo, a = const bar);
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//~^ ERROR attempt to use a non-constant value in a constant
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asm!("{a}", in("x0") foo, a = const bar);
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//~^ ERROR attempt to use a non-constant value in a constant
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asm!("{1}", in("x0") foo, const bar);
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//~^ ERROR positional arguments cannot follow named arguments or explicit register arguments
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//~^^ ERROR attempt to use a non-constant value in a constant
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asm!("", options(), "");
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//~^ ERROR expected one of
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asm!("{}", in(reg) foo, "{}", out(reg) foo);
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//~^ ERROR expected one of
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asm!(format!("{{{}}}", 0), in(reg) foo);
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//~^ ERROR asm template must be a string literal
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asm!("{1}", format!("{{{}}}", 0), in(reg) foo, out(reg) bar);
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//~^ ERROR asm template must be a string literal
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asm!("{}", in(reg) _);
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//~^ ERROR _ cannot be used for input operands
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asm!("{}", inout(reg) _);
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//~^ ERROR _ cannot be used for input operands
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asm!("{}", inlateout(reg) _);
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//~^ ERROR _ cannot be used for input operands
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}
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}
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const FOO: i32 = 1;
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const BAR: i32 = 2;
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global_asm!();
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//~^ ERROR requires at least a template string argument
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global_asm!(FOO);
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//~^ ERROR asm template must be a string literal
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global_asm!("{}" FOO);
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//~^ ERROR expected token: `,`
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global_asm!("{}", FOO);
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//~^ ERROR expected operand, options, or additional template string
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global_asm!("{}", const);
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//~^ ERROR expected expression, found end of macro arguments
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global_asm!("{}", const(reg) FOO);
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//~^ ERROR expected one of
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global_asm!("", options(FOO));
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//~^ ERROR expected one of
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global_asm!("", options(nomem FOO));
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//~^ ERROR expected one of
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global_asm!("", options(nomem, FOO));
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//~^ ERROR expected one of
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global_asm!("{}", options(), const FOO);
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global_asm!("", clobber_abi(FOO));
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//~^ ERROR expected string literal
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global_asm!("", clobber_abi("C" FOO));
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//~^ ERROR expected one of `)` or `,`, found `FOO`
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global_asm!("", clobber_abi("C", FOO));
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//~^ ERROR expected string literal
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global_asm!("{}", clobber_abi("C"), const FOO);
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//~^ ERROR `clobber_abi` cannot be used with `global_asm!`
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global_asm!("", options(), clobber_abi("C"));
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//~^ ERROR `clobber_abi` cannot be used with `global_asm!`
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global_asm!("{}", options(), clobber_abi("C"), const FOO);
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//~^ ERROR `clobber_abi` cannot be used with `global_asm!`
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global_asm!("{a}", a = const FOO, a = const BAR);
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//~^ ERROR duplicate argument named `a`
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//~^^ ERROR argument never used
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global_asm!("", options(), "");
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//~^ ERROR expected one of
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global_asm!("{}", const FOO, "{}", const FOO);
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//~^ ERROR expected one of
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global_asm!(format!("{{{}}}", 0), const FOO);
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//~^ ERROR asm template must be a string literal
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global_asm!("{1}", format!("{{{}}}", 0), const FOO, const BAR);
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//~^ ERROR asm template must be a string literal
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