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Generalize the Assume intrinsic statement to a general Intrinsic statement

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This commit is contained in:
Oli Scherer 2022-07-12 10:05:00 +00:00
parent 3f07645120
commit b7413511dc
28 changed files with 166 additions and 143 deletions
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23
compiler/rustc_const_eval/src/interpret/step.rs
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@ -2,8 +2,8 @@
//!
//! The main entry point is the `step` method.
use rustc_middle::mir;
use rustc_middle::mir::interpret::{InterpResult, Scalar};
use rustc_middle::mir::{self, NonDivergingIntrinsic};
use rustc_middle::ty::layout::LayoutOf;
use super::{InterpCx, Machine};
@ -114,22 +114,23 @@ impl<'mir, 'tcx: 'mir, M: Machine<'mir, 'tcx>> InterpCx<'mir, 'tcx, M> {
M::retag(self, *kind, &dest)?;
}
// Call CopyNonOverlapping
CopyNonOverlapping(box rustc_middle::mir::CopyNonOverlapping { src, dst, count }) => {
let src = self.eval_operand(src, None)?;
let dst = self.eval_operand(dst, None)?;
let count = self.eval_operand(count, None)?;
self.copy_intrinsic(&src, &dst, &count, /* nonoverlapping */ true)?;
}
// Call Assume
Assume(box op) => {
Intrinsic(box NonDivergingIntrinsic::Assume(op)) => {
let op = self.eval_operand(op, None)?;
let cond = self.read_scalar(&op)?.to_bool()?;
if !cond {
throw_ub_format!("`assume` called with `false`");
}
}
Intrinsic(box NonDivergingIntrinsic::CopyNonOverlapping(mir::CopyNonOverlapping {
ref count,
ref src,
ref dst,
})) => {
let src = self.eval_operand(src, None)?;
let dst = self.eval_operand(dst, None)?;
let count = self.eval_operand(count, None)?;
self.copy_intrinsic(&src, &dst, &count, /* nonoverlapping */ true)?;
}
// Statements we do not track.
AscribeUserType(..) => {}