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miri: optimize zeroed alloc

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Co-authored-by: Ralf Jung <post@ralfj.de>
This commit is contained in:
SpecificProtagonist
2025-01-25 00:54:51 +01:00
parent 8231e8599e
commit eee9df43e6
14 changed files with 88 additions and 79 deletions
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8
compiler/rustc_const_eval/src/const_eval/machine.rs
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@@ -21,9 +21,10 @@ use super::error::*;
use crate::errors::{LongRunning, LongRunningWarn};
use crate::fluent_generated as fluent;
use crate::interpret::{
self, AllocId, AllocRange, ConstAllocation, CtfeProvenance, FnArg, Frame, GlobalAlloc, ImmTy,
InterpCx, InterpResult, MPlaceTy, OpTy, RangeSet, Scalar, compile_time_machine, interp_ok,
throw_exhaust, throw_inval, throw_ub, throw_ub_custom, throw_unsup, throw_unsup_format,
self, AllocId, AllocInit, AllocRange, ConstAllocation, CtfeProvenance, FnArg, Frame,
GlobalAlloc, ImmTy, InterpCx, InterpResult, MPlaceTy, OpTy, RangeSet, Scalar,
compile_time_machine, interp_ok, throw_exhaust, throw_inval, throw_ub, throw_ub_custom,
throw_unsup, throw_unsup_format,
};
/// When hitting this many interpreted terminators we emit a deny by default lint
@@ -420,6 +421,7 @@ impl<'tcx> interpret::Machine<'tcx> for CompileTimeMachine<'tcx> {
Size::from_bytes(size),
align,
interpret::MemoryKind::Machine(MemoryKind::Heap),
AllocInit::Uninit,
)?;
ecx.write_pointer(ptr, dest)?;
}