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compiler.tree.escape-analysis.allocations: stub doc file from comments

db4
Björn Lindqvist 2015-07-26 20:37:24 +02:00 committed by John Benediktsson
parent b4e4792cb6
commit 06560b24a6
2 changed files with 28 additions and 10 deletions
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28
basis/compiler/tree/escape-analysis/allocations/allocations-docs.factor Normal file
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@ -0,0 +1,28 @@
USING: compiler.tree disjoint-sets help.markup help.syntax ;
IN: compiler.tree.escape-analysis.allocations
HELP: allocations
{ $var-description "A map from values to one of the following:"
{ $list
"f -- initial status, assigned to values we have not seen yet; may potentially become an allocation later"
"a sequence of values -- potentially unboxed tuple allocations"
"t -- not allocated in this procedure, can never be unboxed"
}
} ;
HELP: compute-escaping-allocations
{ $description "Compute which tuples escape" } ;
HELP: escaping-values
{ $var-description "We track escaping values with a " { $link disjoint-set } "." } ;
HELP: slot-access
{ $var-description "We track slot access to connect constructor inputs with accessor outputs." } ;
HELP: value-classes
{ $var-description "A map from values to classes. Only for " { $link #introduce } " outputs." } ;
ARTICLE: "compiler.tree.escape-analysis.allocations" "Tracking memory allocations"
"Tracks memory allocations and unboxes those which can be determined never escapes." ;
ABOUT: "compiler.tree.escape-analysis.allocations"

10
basis/compiler/tree/escape-analysis/allocations/allocations.factor
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@ -5,18 +5,12 @@ namespaces sequences stack-checker.values ;
FROM: namespaces => set ;
IN: compiler.tree.escape-analysis.allocations
! A map from values to classes. Only for #introduce outputs
SYMBOL: value-classes
: value-class ( value -- class ) value-classes get at ;
: set-value-class ( class value -- ) value-classes get set-at ;
! A map from values to one of the following:
! - f -- initial status, assigned to values we have not seen yet;
! may potentially become an allocation later
! - a sequence of values -- potentially unboxed tuple allocations
! - t -- not allocated in this procedure, can never be unboxed
SYMBOL: allocations
: (allocation) ( -- allocations )
@ -31,8 +25,6 @@ SYMBOL: allocations
: record-allocations ( allocations values -- )
(allocation) '[ _ set-at ] 2each ;
! We track slot access to connect constructor inputs with
! accessor outputs.
SYMBOL: slot-accesses
TUPLE: slot-access slot# value ;
@ -42,7 +34,6 @@ C: <slot-access> slot-access
: record-slot-access ( out slot# in -- )
<slot-access> swap slot-accesses get set-at ;
! We track escaping values with a disjoint set.
SYMBOL: escaping-values
SYMBOL: +escaping+
@ -126,7 +117,6 @@ DEFER: copy-value
[ nth swap copy-value ]
} cond ;
! Compute which tuples escape
SYMBOL: escaping-allocations
: compute-escaping-allocations ( -- )