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体验新版 GitCode,发现更多精彩内容 >>
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72070d81
编写于
4月 05, 2022
作者:
O
ouz-a
浏览文件
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浏览文件
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电子邮件补丁
差异文件
remove region check
上级
904d6c86
变更
1
隐藏空白更改
内联
并排
Showing
1 changed file
with
11 addition
and
9 deletion
+11
-9
compiler/rustc_mir_transform/src/deref_separator.rs
compiler/rustc_mir_transform/src/deref_separator.rs
+11
-9
未找到文件。
compiler/rustc_mir_transform/src/deref_separator.rs
浏览文件 @
72070d81
...
...
@@ -13,21 +13,18 @@ pub fn deref_finder<'tcx>(tcx: TyCtxt<'tcx>, body: &mut Body<'tcx>) {
match
stmt
.kind
{
StatementKind
::
Assign
(
box
(
og_place
,
Rvalue
::
Ref
(
region
,
borrow_knd
,
place
)))
=>
{
for
(
idx
,
(
p_ref
,
p_elem
))
in
place
.iter_projections
()
.enumerate
()
{
if
p_elem
==
ProjectionElem
::
Deref
&&
!
p_ref
.projection
.is_empty
()
&&
region
.is_erased
()
{
// The type that we are derefing
if
p_elem
==
ProjectionElem
::
Deref
&&
!
p_ref
.projection
.is_empty
()
{
// The type that we are derefing.
let
ty
=
p_ref
.ty
(
local_decl
,
tcx
)
.ty
;
let
temp
=
patch
.new_temp
(
ty
,
stmt
.source_info.span
);
// Because we are assigning this right before original statement
// we are using index i of statement
// we are using index i of statement
.
let
loc
=
Location
{
block
:
block
,
statement_index
:
i
};
patch
.add_statement
(
loc
,
StatementKind
::
StorageLive
(
temp
));
// We are adding current p_ref's projections to our
// temp value
// temp value
.
let
deref_place
=
Place
::
from
(
p_ref
.local
)
.project_deeper
(
p_ref
.projection
,
tcx
);
patch
.add_assign
(
...
...
@@ -37,7 +34,7 @@ pub fn deref_finder<'tcx>(tcx: TyCtxt<'tcx>, body: &mut Body<'tcx>) {
);
// We are creating a place by using our temp value's location
// and copying derefed values which we need to create new statement
// and copying derefed values which we need to create new statement
.
let
temp_place
=
Place
::
from
(
temp
)
.project_deeper
(
&
place
.projection
[
idx
..
],
tcx
);
let
new_stmt
=
Statement
{
...
...
@@ -48,12 +45,17 @@ pub fn deref_finder<'tcx>(tcx: TyCtxt<'tcx>, body: &mut Body<'tcx>) {
))),
};
// Replace current statement with newly created one
// Replace current statement with newly created one
.
*
stmt
=
new_stmt
;
// Since our job with the temp is done it should be gone
let
loc
=
Location
{
block
:
block
,
statement_index
:
statement_len
};
patch
.add_statement
(
loc
,
StatementKind
::
StorageDead
(
temp
));
// As all projections are off the base projection, if there are
// multiple derefs in the middle of projection, it might cause
// unsoundness, to not let that happen we break the loop.
break
;
}
}
}
...
...
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