bjoernager/rust
bjoernager/rust
1
Fork 0
Code Activity

Support use of asm goto with outputs and options(noreturn)

Browse source 
When labels are present, the `noreturn` option really means that asm block
won't fallthrough -- if labels are present, then outputs can still be
meaningfully used.
This commit is contained in:
Gary Guo 2024-10-11 00:26:21 +01:00
parent b8df869ebb
commit 73f8309300
5 changed files with 45 additions and 5 deletions
Download patch file Download diff file Expand all files Collapse all files

5
compiler/rustc_builtin_macros/src/asm.rs
View file

@ -300,7 +300,10 @@ pub fn parse_asm_args<'a>(
if args.options.contains(ast::InlineAsmOptions::PURE) && !have_real_output {
dcx.emit_err(errors::AsmPureNoOutput { spans: args.options_spans.clone() });
}
if args.options.contains(ast::InlineAsmOptions::NORETURN) && !outputs_sp.is_empty() {
if args.options.contains(ast::InlineAsmOptions::NORETURN)
&& !outputs_sp.is_empty()
&& labels_sp.is_empty()
{
let err = dcx.create_err(errors::AsmNoReturn { outputs_sp });
// Bail out now since this is likely to confuse MIR
return Err(err);