bjoernager/rust
bjoernager/rust
1
Fork 0
Code Activity

Auto merge of #111424 - JakobDegen:inline-unsized, r=tmiasko

Browse source 
Don't inline functions with unsized args

Fixes #111355 .

I have some ideas for how we can get this back in the future, out of scope for this PR though.

r? `@cjgillot`
This commit is contained in:
bors 2023-05-21 11:23:26 +00:00
commit 06345574d9
3 changed files with 77 additions and 3 deletions
Download patch file Download diff file Expand all files Collapse all files

15
compiler/rustc_mir_transform/src/inline.rs
View file

@ -168,6 +168,18 @@ impl<'tcx> Inliner<'tcx> {
) -> Result<std::ops::Range<BasicBlock>, &'static str> {
let callee_attrs = self.tcx.codegen_fn_attrs(callsite.callee.def_id());
self.check_codegen_attributes(callsite, callee_attrs)?;
let terminator = caller_body[callsite.block].terminator.as_ref().unwrap();
let TerminatorKind::Call { args, destination, .. } = &terminator.kind else { bug!() };
let destination_ty = destination.ty(&caller_body.local_decls, self.tcx).ty;
for arg in args {
if !arg.ty(&caller_body.local_decls, self.tcx).is_sized(self.tcx, self.param_env) {
// We do not allow inlining functions with unsized params. Inlining these functions
// could create unsized locals, which are unsound and being phased out.
return Err("Call has unsized argument");
}
}
self.check_mir_is_available(caller_body, &callsite.callee)?;
let callee_body = try_instance_mir(self.tcx, callsite.callee.def)?;
self.check_mir_body(callsite, callee_body, callee_attrs)?;
@ -189,9 +201,6 @@ impl<'tcx> Inliner<'tcx> {
// Check call signature compatibility.
// Normally, this shouldn't be required, but trait normalization failure can create a
// validation ICE.
let terminator = caller_body[callsite.block].terminator.as_ref().unwrap();
let TerminatorKind::Call { args, destination, .. } = &terminator.kind else { bug!() };
let destination_ty = destination.ty(&caller_body.local_decls, self.tcx).ty;
let output_type = callee_body.return_ty();
if !util::is_subtype(self.tcx, self.param_env, output_type, destination_ty) {
trace!(?output_type, ?destination_ty);