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go
golang
Commits
a8b56a73
Commit
a8b56a73
authored
Nov 05, 2008
by
Ken Thompson
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Plain Diff
T,ok = I.(T)
R=r OCL=18580 CL=18582
parent
6f07ec72
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Showing
1 changed file
with
47 additions
and
24 deletions
+47
-24
walk.c
src/cmd/gc/walk.c
+47
-24
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src/cmd/gc/walk.c
View file @
a8b56a73
...
@@ -14,8 +14,10 @@ enum
...
@@ -14,8 +14,10 @@ enum
{
{
Inone
,
Inone
,
I2T
,
I2T
,
I2T2
,
I2I
,
I2I
,
T2I
I2I2
,
T2I
,
};
};
// can this code branch reach the end
// can this code branch reach the end
...
@@ -463,6 +465,33 @@ loop:
...
@@ -463,6 +465,33 @@ loop:
goto
ret
;
goto
ret
;
}
}
break
;
break
;
case
OCONV
:
if
(
cl
==
2
&&
cr
==
1
)
{
// a,b = i.(T)
if
(
r
->
left
==
N
)
break
;
et
=
isandss
(
r
->
type
,
r
->
left
);
switch
(
et
)
{
case
I2T
:
et
=
I2T2
;
break
;
case
I2I
:
et
=
I2I2
;
break
;
default:
et
=
Inone
;
break
;
}
if
(
et
==
Inone
)
break
;
r
=
ifaceop
(
r
->
type
,
r
->
left
,
et
);
l
=
ascompatet
(
n
->
op
,
&
n
->
left
,
&
r
->
type
,
0
);
if
(
l
!=
N
)
indir
(
n
,
list
(
r
,
reorder2
(
l
)));
goto
ret
;
}
break
;
}
}
switch
(
l
->
op
)
{
switch
(
l
->
op
)
{
...
@@ -2667,6 +2696,15 @@ isandss(Type *lt, Node *r)
...
@@ -2667,6 +2696,15 @@ isandss(Type *lt, Node *r)
return
Inone
;
return
Inone
;
}
}
static
char
*
ifacename
[]
=
{
[
I2T
]
=
"ifaceI2T"
,
[
I2T2
]
=
"ifaceI2T2"
,
[
I2I
]
=
"ifaceI2I"
,
[
I2I2
]
=
"ifaceI2I2"
,
};
Node
*
Node
*
ifaceop
(
Type
*
tl
,
Node
*
n
,
int
op
)
ifaceop
(
Type
*
tl
,
Node
*
n
,
int
op
)
{
{
...
@@ -2678,26 +2716,7 @@ ifaceop(Type *tl, Node *n, int op)
...
@@ -2678,26 +2716,7 @@ ifaceop(Type *tl, Node *n, int op)
switch
(
op
)
{
switch
(
op
)
{
default:
default:
fatal
(
"ifaceop: unknown op %d
\n
"
,
op
);
fatal
(
"ifaceop: unknown op %O
\n
"
,
op
);
case
I2T
:
// ifaceI2T(sigt *byte, iface any) (ret any);
a
=
n
;
// interface
r
=
a
;
s
=
signame
(
tl
);
// sigi
if
(
s
==
S
)
fatal
(
"ifaceop: signame I2T"
);
a
=
s
->
oname
;
a
=
nod
(
OADDR
,
a
,
N
);
r
=
list
(
a
,
r
);
on
=
syslook
(
"ifaceI2T"
,
1
);
argtype
(
on
,
tr
);
argtype
(
on
,
tl
);
break
;
case
T2I
:
case
T2I
:
// ifaceT2I(sigi *byte, sigt *byte, elem any) (ret any);
// ifaceT2I(sigi *byte, sigt *byte, elem any) (ret any);
...
@@ -2726,22 +2745,26 @@ ifaceop(Type *tl, Node *n, int op)
...
@@ -2726,22 +2745,26 @@ ifaceop(Type *tl, Node *n, int op)
break
;
break
;
case
I2T
:
case
I2T2
:
case
I2I
:
case
I2I
:
// ifaceI2I(sigi *byte, iface any-1) (ret any-2);
case
I2I2
:
// iface[IT]2[IT][2](sigt *byte, iface any) (ret any[, ok bool]);
a
=
n
;
// interface
a
=
n
;
// interface
r
=
a
;
r
=
a
;
s
=
signame
(
tl
);
// sigi
s
=
signame
(
tl
);
// sigi
if
(
s
==
S
)
if
(
s
==
S
)
fatal
(
"ifaceop: signame
I2I"
);
fatal
(
"ifaceop: signame
%d"
,
op
);
a
=
s
->
oname
;
a
=
s
->
oname
;
a
=
nod
(
OADDR
,
a
,
N
);
a
=
nod
(
OADDR
,
a
,
N
);
r
=
list
(
a
,
r
);
r
=
list
(
a
,
r
);
on
=
syslook
(
"ifaceI2I"
,
1
);
on
=
syslook
(
ifacename
[
op
]
,
1
);
argtype
(
on
,
tr
);
argtype
(
on
,
tr
);
argtype
(
on
,
tl
);
argtype
(
on
,
tl
);
break
;
break
;
case
OEQ
:
case
OEQ
:
...
...
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