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Boxiang Sun
Pyston
Commits
5500b773
Commit
5500b773
authored
Jul 06, 2016
by
Kevin Modzelewski
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Plain Diff
Fix some vreg-reuse confusion
parent
a0529f48
Changes
2
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2 changed files
with
27 additions
and
13 deletions
+27
-13
src/analysis/function_analysis.cpp
src/analysis/function_analysis.cpp
+10
-3
src/core/cfg.cpp
src/core/cfg.cpp
+17
-10
No files found.
src/analysis/function_analysis.cpp
View file @
5500b773
...
...
@@ -158,11 +158,10 @@ bool LivenessAnalysis::isLiveAtEnd(int vreg, CFGBlock* block) {
if
(
vreg
<
block
->
cfg
->
getVRegInfo
().
getNumOfUserVisibleVRegs
())
return
true
;
// For block-local vregs, this query doesn't really make sense,
// since the vreg will be live but that's probably not what we care about.
// It's probably safe to return false, but let's just error for now.
#ifndef NDEBUG
if
(
block
->
cfg
->
getVRegInfo
().
isBlockLocalVReg
(
vreg
))
return
false
;
#endif
if
(
block
->
successors
.
size
()
==
0
)
return
false
;
...
...
@@ -206,6 +205,14 @@ bool LivenessAnalysis::isLiveAtEnd(int vreg, CFGBlock* block) {
us_liveness
.
log
(
_t
.
end
());
}
// For block-local vregs, this query doesn't really make sense,
// since the vreg will be live but that's probably not what we care about.
// It's probably safe to return false, but let's just error for now.
if
(
block
->
cfg
->
getVRegInfo
().
isBlockLocalVReg
(
vreg
))
{
ASSERT
(
!
result_cache
[
vreg
][
block
],
"%d in %d"
,
vreg
,
block
->
idx
);
return
false
;
}
return
result_cache
[
vreg
][
block
];
}
...
...
src/core/cfg.cpp
View file @
5500b773
...
...
@@ -232,6 +232,9 @@ private:
CFGBlock
*
exc_dest
;
// variable names to store the exception (type, value, traceback) in
InternedString
exc_type_name
,
exc_value_name
,
exc_traceback_name
;
// Similar to did_why: says whether the block might have been jumped-to
bool
maybe_taken
;
};
// ---------- Member fields ----------
...
...
@@ -1576,6 +1579,7 @@ public:
curblock
->
connectTo
(
exc_dest
);
ExcBlockInfo
&
exc_info
=
exc_handlers
.
back
();
exc_info
.
maybe_taken
=
true
;
curblock
=
exc_dest
;
// TODO: need to clear some temporaries here
...
...
@@ -2341,7 +2345,7 @@ public:
InternedString
exc_type_name
=
nodeName
(
"type"
);
InternedString
exc_value_name
=
nodeName
(
"value"
);
InternedString
exc_traceback_name
=
nodeName
(
"traceback"
);
exc_handlers
.
push_back
({
exc_handler_block
,
exc_type_name
,
exc_value_name
,
exc_traceback_name
});
exc_handlers
.
push_back
({
exc_handler_block
,
exc_type_name
,
exc_value_name
,
exc_traceback_name
,
false
});
for
(
AST_stmt
*
subnode
:
node
->
body
)
{
subnode
->
accept
(
this
);
...
...
@@ -2464,7 +2468,7 @@ public:
InternedString
exc_value_name
=
nodeName
(
"value"
);
InternedString
exc_traceback_name
=
nodeName
(
"traceback"
);
InternedString
exc_why_name
=
nodeName
(
"why"
);
exc_handlers
.
push_back
({
exc_handler_block
,
exc_type_name
,
exc_value_name
,
exc_traceback_name
});
exc_handlers
.
push_back
({
exc_handler_block
,
exc_type_name
,
exc_value_name
,
exc_traceback_name
,
false
});
CFGBlock
*
finally_block
=
cfg
->
addDeferredBlock
();
pushFinallyContinuation
(
finally_block
,
exc_why_name
);
...
...
@@ -2475,6 +2479,7 @@ public:
break
;
}
bool
maybe_exception
=
exc_handlers
.
back
().
maybe_taken
;
exc_handlers
.
pop_back
();
int
did_why
=
continuations
.
back
().
did_why
;
// bad to just reach in like this
...
...
@@ -2512,15 +2517,17 @@ public:
exitFinallyIf
(
node
,
Why
::
BREAK
,
exc_why_name
);
if
(
did_why
&
(
1
<<
Why
::
CONTINUE
))
exitFinallyIf
(
node
,
Why
::
CONTINUE
,
exc_why_name
);
if
(
maybe_exception
)
{
CFGBlock
*
reraise
=
cfg
->
addDeferredBlock
();
CFGBlock
*
noexc
=
makeFinallyCont
(
Why
::
EXCEPTION
,
makeLoad
(
exc_why_name
,
node
,
true
),
reraise
);
CFGBlock
*
reraise
=
cfg
->
addDeferredBlock
();
CFGBlock
*
noexc
=
makeFinallyCont
(
Why
::
EXCEPTION
,
makeLoad
(
exc_why_name
,
node
,
true
),
reraise
);
cfg
->
placeBlock
(
reraise
);
curblock
=
reraise
;
pushReraise
(
getLastLinenoSub
(
node
->
finalbody
.
back
()),
exc_type_name
,
exc_value_name
,
exc_traceback_name
);
cfg
->
placeBlock
(
reraise
);
curblock
=
reraise
;
pushReraise
(
getLastLinenoSub
(
node
->
finalbody
.
back
()),
exc_type_name
,
exc_value_name
,
exc_traceback_name
);
curblock
=
noexc
;
curblock
=
noexc
;
}
}
return
true
;
...
...
@@ -2585,7 +2592,7 @@ public:
CFGBlock
*
exc_block
=
cfg
->
addDeferredBlock
();
exc_block
->
info
=
"with_exc"
;
exc_handlers
.
push_back
({
exc_block
,
exc_type_name
,
exc_value_name
,
exc_traceback_name
});
exc_handlers
.
push_back
({
exc_block
,
exc_type_name
,
exc_value_name
,
exc_traceback_name
,
false
});
for
(
int
i
=
0
;
i
<
node
->
body
.
size
();
i
++
)
{
node
->
body
[
i
]
->
accept
(
this
);
...
...
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