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write_bytes(): fix handling of types that are larger than u128

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This commit is contained in:
David Renshaw 2017-03-13 20:32:43 -04:00
parent aa2f9988a4
commit e79ee140ee
1 changed files with 3 additions and 10 deletions
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13
src/terminator/intrinsic.rs
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@ -406,18 +406,11 @@ impl<'a, 'tcx> EvalContext<'a, 'tcx> {
let u8 = self.tcx.types.u8;
let ty = substs.type_at(0);
let size = self.type_size(ty)?.expect("write_bytes() type must be sized");
let val_byte = self.value_to_primval(arg_vals[1], u8)?.to_u128()?;
let mut pattern: u128 = 0;
for ii in 0..size {
pattern |= val_byte << (8 * ii);
}
let val_full = Value::ByVal(PrimVal::from_u128(pattern));
let mut ptr = arg_vals[0].read_ptr(&self.memory)?;
let count = self.value_to_primval(arg_vals[2], usize)?.to_u64()?;
for _ in 0..count {
self.write_value_to_ptr(val_full, ptr, ty)?;
ptr = ptr.offset(size);
for _ in 0..(count * size) {
self.write_value_to_ptr(arg_vals[1], ptr, u8)?;
ptr = ptr.offset(1);
}
}