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Introduce Machine::POST_MONO_CHECKS.

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This commit is contained in:
Camille GILLOT 2023-09-12 20:17:52 +00:00
parent e5fedceabf
commit 054ed8e7eb
3 changed files with 12 additions and 4 deletions
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10
compiler/rustc_const_eval/src/interpret/eval_context.rs
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@ -749,10 +749,12 @@ impl<'mir, 'tcx: 'mir, M: Machine<'mir, 'tcx>> InterpCx<'mir, 'tcx, M> {
self.stack_mut().push(frame);
// Make sure all the constants required by this frame evaluate successfully (post-monomorphization check).
for ct in &body.required_consts {
let span = ct.span;
let ct = self.subst_from_current_frame_and_normalize_erasing_regions(ct.literal)?;
self.eval_mir_constant(&ct, Some(span), None)?;
if M::POST_MONO_CHECKS {
for ct in &body.required_consts {
let span = ct.span;
let ct = self.subst_from_current_frame_and_normalize_erasing_regions(ct.literal)?;
self.eval_mir_constant(&ct, Some(span), None)?;
}
}
// done

3
compiler/rustc_const_eval/src/interpret/machine.rs
View file

@ -130,6 +130,9 @@ pub trait Machine<'mir, 'tcx: 'mir>: Sized {
/// Should the machine panic on allocation failures?
const PANIC_ON_ALLOC_FAIL: bool;
/// Should post-monomorphization checks be run when a stack frame is pushed?
const POST_MONO_CHECKS: bool = true;
/// Whether memory accesses should be alignment-checked.
fn enforce_alignment(ecx: &InterpCx<'mir, 'tcx, Self>) -> CheckAlignment;

3
compiler/rustc_mir_transform/src/const_prop.rs
View file

@ -143,8 +143,11 @@ impl ConstPropMachine<'_, '_> {
impl<'mir, 'tcx> interpret::Machine<'mir, 'tcx> for ConstPropMachine<'mir, 'tcx> {
compile_time_machine!(<'mir, 'tcx>);
const PANIC_ON_ALLOC_FAIL: bool = true; // all allocations are small (see `MAX_ALLOC_LIMIT`)
const POST_MONO_CHECKS: bool = false; // this MIR is still generic!
type MemoryKind = !;
#[inline(always)]