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Move CTFE handling of nondiverging intrinsics to intrinsics.rs
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@ -8,7 +8,7 @@ use rustc_hir::def_id::DefId;
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use rustc_middle::mir::{
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self,
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interpret::{ConstValue, GlobalId, InterpResult, PointerArithmetic, Scalar},
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BinOp,
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BinOp, NonDivergingIntrinsic,
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};
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use rustc_middle::ty;
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use rustc_middle::ty::layout::LayoutOf as _;
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@ -530,6 +530,32 @@ impl<'mir, 'tcx: 'mir, M: Machine<'mir, 'tcx>> InterpCx<'mir, 'tcx, M> {
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Ok(true)
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}
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pub(super) fn emulate_nondiverging_intrinsic(
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&mut self,
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intrinsic: &NonDivergingIntrinsic<'tcx>,
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) -> InterpResult<'tcx> {
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match intrinsic {
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NonDivergingIntrinsic::Assume(op) => {
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let op = self.eval_operand(op, None)?;
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let cond = self.read_scalar(&op)?.to_bool()?;
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if !cond {
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throw_ub_format!("`assume` called with `false`");
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}
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Ok(())
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}
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NonDivergingIntrinsic::CopyNonOverlapping(mir::CopyNonOverlapping {
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count,
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src,
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dst,
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}) => {
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let src = self.eval_operand(src, None)?;
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let dst = self.eval_operand(dst, None)?;
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let count = self.eval_operand(count, None)?;
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self.copy_intrinsic(&src, &dst, &count, /* nonoverlapping */ true)
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}
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}
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}
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pub fn exact_div(
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&mut self,
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a: &ImmTy<'tcx, M::Provenance>,
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@ -2,8 +2,8 @@
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//!
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//! The main entry point is the `step` method.
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use rustc_middle::mir;
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use rustc_middle::mir::interpret::{InterpResult, Scalar};
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use rustc_middle::mir::{self, NonDivergingIntrinsic};
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use rustc_middle::ty::layout::LayoutOf;
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use super::{InterpCx, Machine};
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@ -114,23 +114,7 @@ impl<'mir, 'tcx: 'mir, M: Machine<'mir, 'tcx>> InterpCx<'mir, 'tcx, M> {
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M::retag(self, *kind, &dest)?;
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}
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Intrinsic(box NonDivergingIntrinsic::Assume(op)) => {
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let op = self.eval_operand(op, None)?;
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let cond = self.read_scalar(&op)?.to_bool()?;
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if !cond {
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throw_ub_format!("`assume` called with `false`");
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}
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}
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Intrinsic(box NonDivergingIntrinsic::CopyNonOverlapping(mir::CopyNonOverlapping {
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ref count,
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ref src,
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ref dst,
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})) => {
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let src = self.eval_operand(src, None)?;
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let dst = self.eval_operand(dst, None)?;
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let count = self.eval_operand(count, None)?;
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self.copy_intrinsic(&src, &dst, &count, /* nonoverlapping */ true)?;
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}
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Intrinsic(box ref intrinsic) => self.emulate_nondiverging_intrinsic(intrinsic)?,
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// Statements we do not track.
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AscribeUserType(..) => {}
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