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体验新版 GitCode,发现更多精彩内容 >>
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b0d7338d
编写于
11月 08, 2015
作者:
B
Björn Steinbrink
浏览文件
操作
浏览文件
下载
电子邮件补丁
差异文件
[MIR trans] Add support for SwitchInt
上级
86069e45
变更
3
隐藏空白更改
内联
并排
Showing
3 changed file
with
71 addition
and
30 deletion
+71
-30
src/librustc_trans/trans/mir/block.rs
src/librustc_trans/trans/mir/block.rs
+9
-2
src/librustc_trans/trans/mir/constant.rs
src/librustc_trans/trans/mir/constant.rs
+38
-28
src/test/run-pass/mir_trans_switchint.rs
src/test/run-pass/mir_trans_switchint.rs
+24
-0
未找到文件。
src/librustc_trans/trans/mir/block.rs
浏览文件 @
b0d7338d
...
...
@@ -50,8 +50,15 @@ pub fn trans_block(&mut self, bb: mir::BasicBlock) {
unimplemented!
()
}
mir
::
Terminator
::
SwitchInt
{
..
}
=>
{
unimplemented!
()
mir
::
Terminator
::
SwitchInt
{
ref
discr
,
switch_ty
,
ref
values
,
ref
targets
}
=>
{
let
(
otherwise
,
targets
)
=
targets
.split_last
()
.unwrap
();
let
discr
=
build
::
Load
(
bcx
,
self
.trans_lvalue
(
bcx
,
discr
)
.llval
);
let
switch
=
build
::
Switch
(
bcx
,
discr
,
self
.llblock
(
*
otherwise
),
values
.len
());
for
(
value
,
target
)
in
values
.iter
()
.zip
(
targets
)
{
let
llval
=
self
.trans_constval
(
bcx
,
value
,
switch_ty
);
let
llbb
=
self
.llblock
(
*
target
);
build
::
AddCase
(
switch
,
llval
,
llbb
)
}
}
mir
::
Terminator
::
Diverge
=>
{
...
...
src/librustc_trans/trans/mir/constant.rs
浏览文件 @
b0d7338d
...
...
@@ -9,6 +9,7 @@
// except according to those terms.
use
llvm
::
ValueRef
;
use
middle
::
ty
::
Ty
;
use
rustc
::
middle
::
const_eval
::
ConstVal
;
use
rustc_mir
::
repr
as
mir
;
use
trans
::
consts
::{
self
,
TrueConst
};
...
...
@@ -18,45 +19,54 @@
use
super
::
MirContext
;
impl
<
'bcx
,
'tcx
>
MirContext
<
'bcx
,
'tcx
>
{
pub
fn
trans_constval
(
&
mut
self
,
bcx
:
Block
<
'bcx
,
'tcx
>
,
cv
:
&
ConstVal
,
ty
:
Ty
<
'tcx
>
)
->
ValueRef
{
let
ccx
=
bcx
.ccx
();
let
llty
=
type_of
::
type_of
(
ccx
,
ty
);
match
*
cv
{
ConstVal
::
Float
(
v
)
=>
common
::
C_floating_f64
(
v
,
llty
),
ConstVal
::
Bool
(
v
)
=>
common
::
C_bool
(
ccx
,
v
),
ConstVal
::
Int
(
v
)
=>
common
::
C_integral
(
llty
,
v
as
u64
,
true
),
ConstVal
::
Uint
(
v
)
=>
common
::
C_integral
(
llty
,
v
,
false
),
ConstVal
::
Str
(
ref
v
)
=>
common
::
C_str_slice
(
ccx
,
v
.clone
()),
ConstVal
::
ByteStr
(
ref
v
)
=>
consts
::
addr_of
(
ccx
,
common
::
C_bytes
(
ccx
,
v
),
1
,
"byte_str"
),
ConstVal
::
Struct
(
id
)
|
ConstVal
::
Tuple
(
id
)
=>
{
let
expr
=
bcx
.tcx
()
.map
.expect_expr
(
id
);
let
(
llval
,
_
)
=
match
consts
::
const_expr
(
ccx
,
expr
,
bcx
.fcx.param_substs
,
None
,
TrueConst
::
Yes
)
{
Ok
(
v
)
=>
v
,
Err
(
_
)
=>
panic!
(
"constant eval failure"
),
};
llval
}
ConstVal
::
Function
(
_
)
=>
{
unimplemented!
()
}
}
}
pub
fn
trans_constant
(
&
mut
self
,
bcx
:
Block
<
'bcx
,
'tcx
>
,
constant
:
&
mir
::
Constant
<
'tcx
>
)
->
ValueRef
{
let
ccx
=
bcx
.ccx
();
let
constant_ty
=
bcx
.monomorphize
(
&
constant
.ty
);
let
llty
=
type_of
::
type_of
(
ccx
,
constant_ty
);
match
constant
.literal
{
mir
::
Literal
::
Item
{
..
}
=>
{
unimplemented!
()
}
mir
::
Literal
::
Value
{
ref
value
}
=>
{
match
*
value
{
ConstVal
::
Float
(
v
)
=>
common
::
C_floating_f64
(
v
,
llty
),
ConstVal
::
Bool
(
v
)
=>
common
::
C_bool
(
ccx
,
v
),
ConstVal
::
Int
(
v
)
=>
common
::
C_integral
(
llty
,
v
as
u64
,
true
),
ConstVal
::
Uint
(
v
)
=>
common
::
C_integral
(
llty
,
v
,
false
),
ConstVal
::
Str
(
ref
v
)
=>
common
::
C_str_slice
(
ccx
,
v
.clone
()),
ConstVal
::
ByteStr
(
ref
v
)
=>
consts
::
addr_of
(
ccx
,
common
::
C_bytes
(
ccx
,
v
),
1
,
"byte_str"
),
ConstVal
::
Struct
(
id
)
|
ConstVal
::
Tuple
(
id
)
=>
{
let
expr
=
bcx
.tcx
()
.map
.expect_expr
(
id
);
let
(
llval
,
_
)
=
match
consts
::
const_expr
(
ccx
,
expr
,
bcx
.fcx.param_substs
,
None
,
TrueConst
::
Yes
)
{
Ok
(
v
)
=>
v
,
Err
(
_
)
=>
panic!
(
"constant eval failure"
),
};
llval
}
ConstVal
::
Function
(
_
)
=>
{
unimplemented!
()
}
}
self
.trans_constval
(
bcx
,
value
,
constant_ty
)
}
}
}
...
...
src/test/run-pass/mir_trans_switchint.rs
0 → 100644
浏览文件 @
b0d7338d
// Copyright 2015 The Rust Project Developers. See the COPYRIGHT
// file at the top-level directory of this distribution and at
// http://rust-lang.org/COPYRIGHT.
//
// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
// option. This file may not be copied, modified, or distributed
// except according to those terms.
#![feature(rustc_attrs)]
#[rustc_mir]
pub
fn
foo
(
x
:
i8
)
->
i32
{
match
x
{
1
=>
0
,
_
=>
1
,
}
}
fn
main
()
{
assert_eq!
(
foo
(
0
),
1
);
assert_eq!
(
foo
(
1
),
0
);
}
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