refactor lvalue_ty to be method of lvalue

diff --git a/src/librustc/mir/repr.rs b/src/librustc/mir/repr.rs
index 93507246241de62bde905a68e9fde7acc47e7c47..36ae4237b1918a898bc4b2a1558235d892ba5796 100644 (file)
--- a/src/librustc/mir/repr.rs
+++ b/src/librustc/mir/repr.rs
@@ -32,6 +32,8 @@
 use syntax_pos::Span;
 
 use super::cache::Cache;
+use super::super::ty::TyCtxt;
+use super::tcx::LvalueTy;
 
 macro_rules! newtype_index {
     ($name:ident, $debug_name:expr) => (
@@ -809,8 +811,29 @@ pub fn elem(self, elem: LvalueElem<'tcx>) -> Lvalue<'tcx> {
             elem: elem,
         }))
     }
+
+    pub fn ty<'a, 'gcx>(&self, mir: &Mir<'tcx>, tcx: TyCtxt<'a, 'gcx, 'tcx>) -> LvalueTy<'tcx>
+    {
+        match self {
+            &Lvalue::Var(index) =>
+                LvalueTy::Ty { ty: mir.var_decls[index].ty },
+            &Lvalue::Temp(index) =>
+                LvalueTy::Ty { ty: mir.temp_decls[index].ty },
+            &Lvalue::Arg(index) =>
+                LvalueTy::Ty { ty: mir.arg_decls[index].ty },
+            &Lvalue::Static(def_id) =>
+                LvalueTy::Ty { ty: tcx.lookup_item_type(def_id).ty },
+            &Lvalue::ReturnPointer =>
+                LvalueTy::Ty { ty: mir.return_ty.unwrap() },
+            &Lvalue::Projection(ref proj) =>
+                proj.base.ty(mir, tcx).projection_ty(tcx, &proj.elem),
+        }
+    }
 }
 
+
+
+
 impl<'tcx> Debug for Lvalue<'tcx> {
     fn fmt(&self, fmt: &mut Formatter) -> fmt::Result {
         use self::Lvalue::*;

diff --git a/src/librustc/mir/tcx.rs b/src/librustc/mir/tcx.rs
index e3905c39daa9c593d1d750ea54858bb40542e5bc..6c19db9a0f79e198f893d211ad25acdd3e9529da 100644 (file)
--- a/src/librustc/mir/tcx.rs
+++ b/src/librustc/mir/tcx.rs
@@ -119,7 +119,7 @@ pub fn operand_ty(&self, tcx: TyCtxt<'a, 'gcx, 'tcx>,
                       -> Ty<'tcx>
     {
         match *operand {
-            Operand::Consume(ref l) => self.lvalue_ty(tcx, l).to_ty(tcx),
+            Operand::Consume(ref l) => l.ty(self, tcx).to_ty(tcx),
             Operand::Constant(ref c) => c.ty,
         }
     }
@@ -148,26 +148,6 @@ pub fn binop_ty(&self, tcx: TyCtxt<'a, 'gcx, 'tcx>,
         }
     }
 
-    pub fn lvalue_ty(&self, tcx: TyCtxt<'a, 'gcx, 'tcx>,
-                     lvalue: &Lvalue<'tcx>)
-                     -> LvalueTy<'tcx>
-    {
-        match *lvalue {
-            Lvalue::Var(index) =>
-                LvalueTy::Ty { ty: self.var_decls[index].ty },
-            Lvalue::Temp(index) =>
-                LvalueTy::Ty { ty: self.temp_decls[index].ty },
-            Lvalue::Arg(index) =>
-                LvalueTy::Ty { ty: self.arg_decls[index].ty },
-            Lvalue::Static(def_id) =>
-                LvalueTy::Ty { ty: tcx.lookup_item_type(def_id).ty },
-            Lvalue::ReturnPointer =>
-                LvalueTy::Ty { ty: self.return_ty.unwrap() },
-            Lvalue::Projection(ref proj) =>
-                self.lvalue_ty(tcx, &proj.base).projection_ty(tcx, &proj.elem)
-        }
-    }
-
     pub fn rvalue_ty(&self, tcx: TyCtxt<'a, 'gcx, 'tcx>,
                      rvalue: &Rvalue<'tcx>)
                      -> Option<Ty<'tcx>>
@@ -181,7 +161,7 @@ pub fn rvalue_ty(&self, tcx: TyCtxt<'a, 'gcx, 'tcx>,
                 Some(tcx.mk_array(op_ty, count as usize))
             }
             Rvalue::Ref(reg, bk, ref lv) => {
-                let lv_ty = self.lvalue_ty(tcx, lv).to_ty(tcx);
+                let lv_ty = lv.ty(self, tcx).to_ty(tcx);
                 Some(tcx.mk_ref(
                     tcx.mk_region(reg),
                     ty::TypeAndMut {

diff --git a/src/librustc_borrowck/borrowck/mir/elaborate_drops.rs b/src/librustc_borrowck/borrowck/mir/elaborate_drops.rs
index 623ea60c5a6d88c508da63434985d1f01ef5ddab..f6e9484eda1a4ca54d363454e2531319a8f83e7c 100644 (file)
--- a/src/librustc_borrowck/borrowck/mir/elaborate_drops.rs
+++ b/src/librustc_borrowck/borrowck/mir/elaborate_drops.rs
@@ -185,7 +185,7 @@ fn path_needs_drop(&self, path: MovePathIndex) -> bool
     {
         match self.move_data().move_paths[path].content {
             MovePathContent::Lvalue(ref lvalue) => {
-                let ty = self.mir.lvalue_ty(self.tcx, lvalue).to_ty(self.tcx);
+                let ty = lvalue.ty(self.mir, self.tcx).to_ty(self.tcx);
                 debug!("path_needs_drop({:?}, {:?} : {:?})", path, lvalue, ty);
 
                 self.tcx.type_needs_drop_given_env(ty, self.param_env())
@@ -555,7 +555,7 @@ fn drop_ladder<'a>(&mut self,
 
         let mut fields = fields;
         fields.retain(|&(ref lvalue, _)| {
-            let ty = self.mir.lvalue_ty(self.tcx, lvalue).to_ty(self.tcx);
+            let ty = lvalue.ty(self.mir, self.tcx).to_ty(self.tcx);
             self.tcx.type_needs_drop_given_env(ty, self.param_env())
         });
 
@@ -706,7 +706,7 @@ fn open_drop_for_adt<'a>(&mut self, c: &DropCtxt<'a, 'tcx>,
     /// This creates a "drop ladder" that drops the needed fields of the
     /// ADT, both in the success case or if one of the destructors fail.
     fn open_drop<'a>(&mut self, c: &DropCtxt<'a, 'tcx>) -> BasicBlock {
-        let ty = self.mir.lvalue_ty(self.tcx, c.lvalue).to_ty(self.tcx);
+        let ty = c.lvalue.ty(self.mir, self.tcx).to_ty(self.tcx);
         match ty.sty {
             ty::TyStruct(def, substs) | ty::TyEnum(def, substs) => {
                 self.open_drop_for_adt(c, def, substs)
@@ -892,7 +892,7 @@ fn must_complete_drop<'a>(&self, c: &DropCtxt<'a, 'tcx>) -> bool {
         // dataflow can create unneeded children in some cases
         // - be sure to ignore them.
 
-        let ty = self.mir.lvalue_ty(self.tcx, c.lvalue).to_ty(self.tcx);
+        let ty = c.lvalue.ty(self.mir, self.tcx).to_ty(self.tcx);
 
         match ty.sty {
             ty::TyStruct(def, _) | ty::TyEnum(def, _) => {

diff --git a/src/librustc_borrowck/borrowck/mir/mod.rs b/src/librustc_borrowck/borrowck/mir/mod.rs
index 7481b15685e6991c62b185e00be446523a952026..7c912e8bac6bbe9ede63801c133e23c07c19f91f 100644 (file)
--- a/src/librustc_borrowck/borrowck/mir/mod.rs
+++ b/src/librustc_borrowck/borrowck/mir/mod.rs
@@ -256,7 +256,7 @@ fn move_path_children_matching<'tcx, F>(move_paths: &MovePathData<'tcx>,
 fn lvalue_contents_drop_state_cannot_differ<'a, 'tcx>(tcx: TyCtxt<'a, 'tcx, 'tcx>,
                                                       mir: &Mir<'tcx>,
                                                       lv: &repr::Lvalue<'tcx>) -> bool {
-    let ty = mir.lvalue_ty(tcx, lv).to_ty(tcx);
+    let ty = lv.ty(mir, tcx).to_ty(tcx);
     match ty.sty {
         ty::TyArray(..) | ty::TySlice(..) | ty::TyRef(..) | ty::TyRawPtr(..) => {
             debug!("lvalue_contents_drop_state_cannot_differ lv: {:?} ty: {:?} refd => false",
@@ -355,7 +355,7 @@ fn drop_flag_effects_for_location<'a, 'tcx, F>(
 
         // don't move out of non-Copy things
         if let MovePathContent::Lvalue(ref lvalue) = move_data.move_paths[path].content {
-            let ty = mir.lvalue_ty(tcx, lvalue).to_ty(tcx);
+            let ty = lvalue.ty(mir, tcx).to_ty(tcx);
             if !ty.moves_by_default(tcx, param_env, DUMMY_SP) {
                 continue;
             }

diff --git a/src/librustc_mir/transform/promote_consts.rs b/src/librustc_mir/transform/promote_consts.rs
index 4b551d6bb083cfa85eeb1af32293f67e1b6f21c8..f1e3f55ec8bb1a786579a6f4e0cf025c9990de09 100644 (file)
--- a/src/librustc_mir/transform/promote_consts.rs
+++ b/src/librustc_mir/transform/promote_consts.rs
@@ -347,7 +347,7 @@ pub fn promote_candidates<'a, 'tcx>(mir: &mut Mir<'tcx>,
                         continue;
                     }
                 }
-                (statement.source_info.span, mir.lvalue_ty(tcx, dest).to_ty(tcx))
+                (statement.source_info.span, dest.ty(mir, tcx).to_ty(tcx))
             }
             Candidate::ShuffleIndices(bb) => {
                 let terminator = mir[bb].terminator();

diff --git a/src/librustc_mir/transform/qualify_consts.rs b/src/librustc_mir/transform/qualify_consts.rs
index 1d00938fb25eb3d2c636fb0097ddf906d020c77d..5148cd6735f03250e5cce8e902d4190453e393ca 100644 (file)
--- a/src/librustc_mir/transform/qualify_consts.rs
+++ b/src/librustc_mir/transform/qualify_consts.rs
@@ -485,8 +485,7 @@ fn visit_lvalue(&mut self, lvalue: &Lvalue<'tcx>, context: LvalueContext) {
                                 this.add(Qualif::STATIC);
                             }
 
-                            let base_ty = this.mir.lvalue_ty(this.tcx, &proj.base)
-                                              .to_ty(this.tcx);
+                            let base_ty = proj.base.ty(this.mir, this.tcx).to_ty(this.tcx);
                             if let ty::TyRawPtr(_) = base_ty.sty {
                                 this.add(Qualif::NOT_CONST);
                                 if this.mode != Mode::Fn {
@@ -505,8 +504,7 @@ fn visit_lvalue(&mut self, lvalue: &Lvalue<'tcx>, context: LvalueContext) {
                                           "cannot refer to the interior of another \
                                            static, use a constant instead");
                             }
-                            let ty = this.mir.lvalue_ty(this.tcx, lvalue)
-                                         .to_ty(this.tcx);
+                            let ty = lvalue.ty(this.mir, this.tcx).to_ty(this.tcx);
                             this.qualif.restrict(ty, this.tcx, &this.param_env);
                         }
 
@@ -591,7 +589,7 @@ fn visit_rvalue(&mut self, rvalue: &Rvalue<'tcx>) {
                     self.add(Qualif::STATIC_REF);
                 }
 
-                let ty = self.mir.lvalue_ty(self.tcx, lvalue).to_ty(self.tcx);
+                let ty = lvalue.ty(self.mir, self.tcx).to_ty(self.tcx);
                 if kind == BorrowKind::Mut {
                     // In theory, any zero-sized value could be borrowed
                     // mutably without consequences. However, only &mut []
@@ -801,7 +799,7 @@ struct and enum constructors",
                 } else {
                     // Be conservative about the returned value of a const fn.
                     let tcx = self.tcx;
-                    let ty = self.mir.lvalue_ty(tcx, dest).to_ty(tcx);
+                    let ty = dest.ty(self.mir, tcx).to_ty(tcx);
                     self.qualif = Qualif::empty();
                     self.add_type(ty);
 

diff --git a/src/librustc_mir/transform/type_check.rs b/src/librustc_mir/transform/type_check.rs
index db49e1e040791803103f66e7e34742e5d4b60248..7606c21ed7b752a9ec5ac21e2b34d1033eee5656 100644 (file)
--- a/src/librustc_mir/transform/type_check.rs
+++ b/src/librustc_mir/transform/type_check.rs
@@ -355,7 +355,7 @@ fn check_stmt(&mut self, mir: &Mir<'tcx>, stmt: &Statement<'tcx>) {
         let tcx = self.tcx();
         match stmt.kind {
             StatementKind::Assign(ref lv, ref rv) => {
-                let lv_ty = mir.lvalue_ty(tcx, lv).to_ty(tcx);
+                let lv_ty = lv.ty(mir, tcx).to_ty(tcx);
                 let rv_ty = mir.rvalue_ty(tcx, rv);
                 if let Some(rv_ty) = rv_ty {
                     if let Err(terr) = self.sub_types(self.last_span, rv_ty, lv_ty) {
@@ -390,7 +390,7 @@ fn check_terminator(&mut self,
                 ref value,
                 ..
             } => {
-                let lv_ty = mir.lvalue_ty(tcx, location).to_ty(tcx);
+                let lv_ty = location.ty(mir, tcx).to_ty(tcx);
                 let rv_ty = mir.operand_ty(tcx, value);
                 if let Err(terr) = self.sub_types(self.last_span, rv_ty, lv_ty) {
                     span_mirbug!(self, term, "bad DropAndReplace ({:?} = {:?}): {:?}",
@@ -408,7 +408,7 @@ fn check_terminator(&mut self,
                 }
             }
             TerminatorKind::SwitchInt { ref discr, switch_ty, .. } => {
-                let discr_ty = mir.lvalue_ty(tcx, discr).to_ty(tcx);
+                let discr_ty = discr.ty(mir, tcx).to_ty(tcx);
                 if let Err(terr) = self.sub_types(self.last_span, discr_ty, switch_ty) {
                     span_mirbug!(self, term, "bad SwitchInt ({:?} on {:?}): {:?}",
                                  switch_ty, discr_ty, terr);
@@ -421,7 +421,7 @@ fn check_terminator(&mut self,
                 // FIXME: check the values
             }
             TerminatorKind::Switch { ref discr, adt_def, ref targets } => {
-                let discr_ty = mir.lvalue_ty(tcx, discr).to_ty(tcx);
+                let discr_ty = discr.ty(mir, tcx).to_ty(tcx);
                 match discr_ty.sty {
                     ty::TyEnum(def, _)
                         if def == adt_def && adt_def.variants.len() == targets.len()
@@ -481,7 +481,7 @@ fn check_call_dest(&self,
                 span_mirbug!(self, term, "call to diverging function {:?} with dest", sig);
             }
             (&Some((ref dest, _)), ty::FnConverging(ty)) => {
-                let dest_ty = mir.lvalue_ty(tcx, dest).to_ty(tcx);
+                let dest_ty = dest.ty(mir, tcx).to_ty(tcx);
                 if let Err(terr) = self.sub_types(self.last_span, ty, dest_ty) {
                     span_mirbug!(self, term,
                                  "call dest mismatch ({:?} <- {:?}): {:?}",

diff --git a/src/librustc_trans/collector.rs b/src/librustc_trans/collector.rs
index ba2cd2ba699926ca40e274f5e015f590b2c04f19..6246e4a9d35627649cf5c59910054a4c3d8d3dce 100644 (file)
--- a/src/librustc_trans/collector.rs
+++ b/src/librustc_trans/collector.rs
@@ -525,8 +525,8 @@ fn visit_lvalue(&mut self,
         debug!("visiting lvalue {:?}", *lvalue);
 
         if let mir_visit::LvalueContext::Drop = context {
-            let ty = self.mir.lvalue_ty(self.scx.tcx(), lvalue)
-                             .to_ty(self.scx.tcx());
+            let ty = lvalue.ty(self.mir, self.scx.tcx())
+                           .to_ty(self.scx.tcx());
 
             let ty = monomorphize::apply_param_substs(self.scx.tcx(),
                                                       self.param_substs,

diff --git a/src/librustc_trans/mir/analyze.rs b/src/librustc_trans/mir/analyze.rs
index dac7afab6e38b4d85de41d18f1c2fae4b837c9d4..d6dbefec0346752254731824e160fbe80a4e9db5 100644 (file)
--- a/src/librustc_trans/mir/analyze.rs
+++ b/src/librustc_trans/mir/analyze.rs
@@ -143,7 +143,8 @@ fn visit_lvalue(&mut self,
         // Allow uses of projections of immediate pair fields.
         if let mir::Lvalue::Projection(ref proj) = *lvalue {
             if self.mir.local_index(&proj.base).is_some() {
-                let ty = self.mir.lvalue_ty(self.bcx.tcx(), &proj.base);
+                let ty = proj.base.ty(self.mir, self.bcx.tcx());
+
                 let ty = self.bcx.monomorphize(&ty.to_ty(self.bcx.tcx()));
                 if common::type_is_imm_pair(self.bcx.ccx(), ty) {
                     if let mir::ProjectionElem::Field(..) = proj.elem {
@@ -170,7 +171,7 @@ fn visit_lvalue(&mut self,
                     self.mark_as_lvalue(index);
                 }
                 LvalueContext::Drop => {
-                    let ty = self.mir.lvalue_ty(self.bcx.tcx(), lvalue);
+                    let ty = lvalue.ty(self.mir, self.bcx.tcx());
                     let ty = self.bcx.monomorphize(&ty.to_ty(self.bcx.tcx()));
 
                     // Only need the lvalue if we're actually dropping it.

diff --git a/src/librustc_trans/mir/block.rs b/src/librustc_trans/mir/block.rs
index 9bfdb511c623c97f34974b9711b443978ffcea3b..3290bbf59c56a8253eed8f707e18b2b7fe9f5ec9 100644 (file)
--- a/src/librustc_trans/mir/block.rs
+++ b/src/librustc_trans/mir/block.rs
@@ -230,7 +230,7 @@ pub fn trans_block(&mut self, bb: mir::BasicBlock) {
             }
 
             mir::TerminatorKind::Drop { ref location, target, unwind } => {
-                let ty = mir.lvalue_ty(bcx.tcx(), location).to_ty(bcx.tcx());
+                let ty = location.ty(&mir, bcx.tcx()).to_ty(bcx.tcx());
                 let ty = bcx.monomorphize(&ty);
 
                 // Double check for necessity to drop
@@ -828,7 +828,7 @@ fn make_return_dest(&mut self, bcx: &BlockAndBuilder<'bcx, 'tcx>,
             return ReturnDest::Nothing;
         }
         let dest = if let Some(index) = self.mir.local_index(dest) {
-            let ret_ty = self.lvalue_ty(dest);
+            let ret_ty = self.monomorphized_lvalue_ty(dest);
             match self.locals[index] {
                 LocalRef::Lvalue(dest) => dest,
                 LocalRef::Operand(None) => {

diff --git a/src/librustc_trans/mir/constant.rs b/src/librustc_trans/mir/constant.rs
index 00db19d2739c3953d95615af8801e6169acb13ae..fa40dfd64d6ed746987cb720ea78bf8af80da7cf 100644 (file)
--- a/src/librustc_trans/mir/constant.rs
+++ b/src/librustc_trans/mir/constant.rs
@@ -278,7 +278,7 @@ fn trans(&mut self) -> Result<Const<'tcx>, ConstEvalFailure> {
                 let span = statement.source_info.span;
                 match statement.kind {
                     mir::StatementKind::Assign(ref dest, ref rvalue) => {
-                        let ty = self.mir.lvalue_ty(tcx, dest);
+                        let ty = dest.ty(self.mir, tcx);
                         let ty = self.monomorphize(&ty).to_ty(tcx);
                         match self.const_rvalue(rvalue, ty, span) {
                             Ok(value) => self.store(dest, value, span),
@@ -386,7 +386,7 @@ fn const_lvalue(&self, lvalue: &mir::Lvalue<'tcx>, span: Span)
                 ConstLvalue {
                     base: Base::Static(consts::get_static(self.ccx, def_id).val),
                     llextra: ptr::null_mut(),
-                    ty: self.mir.lvalue_ty(tcx, lvalue).to_ty(tcx)
+                    ty: lvalue.ty(self.mir, tcx).to_ty(tcx)
                 }
             }
             mir::Lvalue::Projection(ref projection) => {

diff --git a/src/librustc_trans/mir/lvalue.rs b/src/librustc_trans/mir/lvalue.rs
index ceaba2a40ca55f77c7773194d179c0a838e53550..94db2e3c23cef29a965a16c4bb7feec768e9f3b7 100644 (file)
--- a/src/librustc_trans/mir/lvalue.rs
+++ b/src/librustc_trans/mir/lvalue.rs
@@ -108,7 +108,7 @@ pub fn trans_lvalue(&mut self,
             mir::Lvalue::Arg(_) |
             mir::Lvalue::ReturnPointer => bug!(), // handled above
             mir::Lvalue::Static(def_id) => {
-                let const_ty = self.lvalue_ty(lvalue);
+                let const_ty = self.monomorphized_lvalue_ty(lvalue);
                 LvalueRef::new_sized(consts::get_static(ccx, def_id).val,
                                      LvalueTy::from_ty(const_ty))
             },
@@ -200,7 +200,7 @@ pub fn trans_lvalue(&mut self,
                             ty::TyArray(..) => {
                                 // must cast the lvalue pointer type to the new
                                 // array type (*[%_; new_len]).
-                                let base_ty = self.lvalue_ty(lvalue);
+                                let base_ty = self.monomorphized_lvalue_ty(lvalue);
                                 let llbasety = type_of::type_of(bcx.ccx(), base_ty).ptr_to();
                                 let llbase = bcx.pointercast(llbase, llbasety);
                                 (llbase, ptr::null_mut())
@@ -240,7 +240,7 @@ pub fn with_lvalue_ref<F, U>(&mut self, bcx: &BlockAndBuilder<'bcx, 'tcx>,
             match self.locals[index] {
                 LocalRef::Lvalue(lvalue) => f(self, lvalue),
                 LocalRef::Operand(None) => {
-                    let lvalue_ty = self.lvalue_ty(lvalue);
+                    let lvalue_ty = self.monomorphized_lvalue_ty(lvalue);
                     let lvalue = LvalueRef::alloca(bcx,
                                                    lvalue_ty,
                                                    "lvalue_temp");
@@ -252,7 +252,7 @@ pub fn with_lvalue_ref<F, U>(&mut self, bcx: &BlockAndBuilder<'bcx, 'tcx>,
                 LocalRef::Operand(Some(_)) => {
                     // See comments in LocalRef::new_operand as to why
                     // we always have Some in a ZST LocalRef::Operand.
-                    let ty = self.lvalue_ty(lvalue);
+                    let ty = self.monomorphized_lvalue_ty(lvalue);
                     if common::type_is_zero_size(bcx.ccx(), ty) {
                         // Pass an undef pointer as no stores can actually occur.
                         let llptr = C_undef(type_of(bcx.ccx(), ty).ptr_to());
@@ -289,9 +289,9 @@ fn prepare_index(&mut self,
         }
     }
 
-    pub fn lvalue_ty(&self, lvalue: &mir::Lvalue<'tcx>) -> Ty<'tcx> {
+    pub fn monomorphized_lvalue_ty(&self, lvalue: &mir::Lvalue<'tcx>) -> Ty<'tcx> {
         let tcx = self.fcx.ccx.tcx();
-        let lvalue_ty = self.mir.lvalue_ty(tcx, lvalue);
+        let lvalue_ty = lvalue.ty(&self.mir, tcx);
         self.fcx.monomorphize(&lvalue_ty.to_ty(tcx))
     }
 }

diff --git a/src/librustc_trans/mir/statement.rs b/src/librustc_trans/mir/statement.rs
index 55efa75b17336aafdea56e516b496388d19a5a36..44d264c7e98f27cacd710ef00caed9622cba1c3b 100644 (file)
--- a/src/librustc_trans/mir/statement.rs
+++ b/src/librustc_trans/mir/statement.rs
@@ -39,7 +39,7 @@ pub fn trans_statement(&mut self,
                             bcx
                         }
                         LocalRef::Operand(Some(_)) => {
-                            let ty = self.lvalue_ty(lvalue);
+                            let ty = self.monomorphized_lvalue_ty(lvalue);
 
                             if !common::type_is_zero_size(bcx.ccx(), ty) {
                                 span_bug!(statement.source_info.span,