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c5230d1148
Fix asm goto with outputs and move it to a separate feature gate Tracking issue: #119364 This PR addresses 3 aspects of asm goto with outputs: * Codegen is fixed. My initial implementation has an oversight which cause the output to be only stored in fallthrough path, but not in label blocks. * Outputs can now be used with `options(noreturn)` if a label block is given. * All of this is moved to a new feature gate, because we likely want to stabilise `asm_goto` before asm goto with outputs. `@rustbot` labels: +A-inline-assembly +F-asm
The codegen crate contains the code to convert from MIR into LLVM IR,
and then from LLVM IR into machine code. In general it contains code
that runs towards the end of the compilation process.
For more information about how codegen works, see the rustc dev guide.