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mir: Call set_operand_dropped in more places, specifically Unsize casts.

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This commit is contained in:
Eduard Burtescu 2016-03-08 15:03:02 +02:00
parent 3e98220a1c
commit 82fad1dfc7
1 changed files with 9 additions and 6 deletions
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15
src/librustc_trans/trans/mir/rvalue.rs
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@ -54,7 +54,7 @@ impl<'bcx, 'tcx> MirContext<'bcx, 'tcx> {
bcx
}
mir::Rvalue::Cast(mir::CastKind::Unsize, ref operand, cast_ty) => {
mir::Rvalue::Cast(mir::CastKind::Unsize, ref source, cast_ty) => {
if common::type_is_fat_ptr(bcx.tcx(), cast_ty) {
// into-coerce of a thin pointer to a fat pointer - just
// use the operand path.
@ -67,7 +67,7 @@ impl<'bcx, 'tcx> MirContext<'bcx, 'tcx> {
// this to be eliminated by MIR translation, but
// `CoerceUnsized` can be passed by a where-clause,
// so the (generic) MIR may not be able to expand it.
let operand = self.trans_operand(&bcx, operand);
let operand = self.trans_operand(&bcx, source);
bcx.with_block(|bcx| {
match operand.val {
OperandValue::FatPtr(..) => unreachable!(),
@ -92,6 +92,7 @@ impl<'bcx, 'tcx> MirContext<'bcx, 'tcx> {
}
}
});
self.set_operand_dropped(&bcx, source);
bcx
}
@ -127,8 +128,8 @@ impl<'bcx, 'tcx> MirContext<'bcx, 'tcx> {
adt::trans_field_ptr(bcx, &repr, val, disr, i)
});
self.store_operand(&bcx, lldest_i, op);
self.set_operand_dropped(&bcx, operand);
}
self.set_operand_dropped(&bcx, operand);
}
},
_ => {
@ -166,8 +167,8 @@ impl<'bcx, 'tcx> MirContext<'bcx, 'tcx> {
// not be structs but arrays.
let dest = bcx.gepi(dest.llval, &[0, i]);
self.store_operand(&bcx, dest, op);
self.set_operand_dropped(&bcx, operand);
}
self.set_operand_dropped(&bcx, operand);
}
}
}
@ -216,8 +217,8 @@ impl<'bcx, 'tcx> MirContext<'bcx, 'tcx> {
assert!(rvalue_creates_operand(rvalue), "cannot trans {:?} to operand", rvalue);
match *rvalue {
mir::Rvalue::Cast(ref kind, ref operand, cast_ty) => {
let operand = self.trans_operand(&bcx, operand);
mir::Rvalue::Cast(ref kind, ref source, cast_ty) => {
let operand = self.trans_operand(&bcx, source);
debug!("cast operand is {:?}", operand);
let cast_ty = bcx.monomorphize(&cast_ty);
@ -250,6 +251,7 @@ impl<'bcx, 'tcx> MirContext<'bcx, 'tcx> {
// example,
// &'a fmt::Debug+Send => &'a fmt::Debug,
// and is a no-op at the LLVM level
self.set_operand_dropped(&bcx, source);
operand.val
}
OperandValue::Immediate(lldata) => {
@ -258,6 +260,7 @@ impl<'bcx, 'tcx> MirContext<'bcx, 'tcx> {
base::unsize_thin_ptr(bcx, lldata,
operand.ty, cast_ty)
});
self.set_operand_dropped(&bcx, source);
OperandValue::FatPtr(lldata, llextra)
}
OperandValue::Ref(_) => {