;;; the largest number of TNs whose liveness changes that we can have
;;; in any block
-(defconstant local-tn-limit 64)
+(def!constant local-tn-limit 64)
(deftype local-tn-number () `(integer 0 (,local-tn-limit)))
(deftype local-tn-count () `(integer 0 ,local-tn-limit))
\f
;;;; PRIMITIVE-TYPEs
-;;; The primitive type is used to represent the aspects of type
+;;; A PRIMITIVE-TYPE is used to represent the aspects of type
;;; interesting to the VM. Selection of IR2 translation templates is
;;; done on the basis of the primitive types of the operands, and the
;;; primitive type of a value is used to constrain the possible
;;; representations of that value.
-(defstruct primitive-type
+(defstruct (primitive-type (:copier nil))
;; the name of this PRIMITIVE-TYPE
(name nil :type symbol)
;; a list of the SC numbers for all the SCs that a TN of this type
(scs nil :type list)
;; the Lisp type equivalent to this type. If this type could never be
;; returned by PRIMITIVE-TYPE, then this is the NIL (or empty) type
- (type (required-argument) :type ctype)
+ (type (missing-arg) :type ctype)
;; the template used to check that an object is of this type. This is a
;; template of one argument and one result, both of primitive-type T. If
;; the argument is of the correct type, then it is delivered into the
;;;; IR1 annotations used for IR2 conversion
;;; Block-Info
-;;; Holds the IR2-Block structure. If there are overflow blocks,
-;;; then this points to the first IR2-Block. The Block-Info of the
+;;; Holds the IR2-BLOCK structure. If there are overflow blocks,
+;;; then this points to the first IR2-BLOCK. The BLOCK-INFO of the
;;; dummy component head and tail are dummy IR2 blocks that begin
;;; and end the emission order thread.
;;;
;;; Component-Info
-;;; Holds the IR2-Component structure.
+;;; Holds the IR2-COMPONENT structure.
;;;
;;; Continuation-Info
;;; Holds the IR2-Continuation structure. Continuations whose
;;; environment pointer should be saved after the binding is
;;; instantiated.
;;;
-;;; Environment-Info
-;;; Holds the IR2-Environment structure.
+;;; Physenv-Info
+;;; Holds the Ir2-Physenv structure.
;;;
;;; Tail-Set-Info
;;; Holds the Return-Info structure.
;;; and after IR2 conversion. It is stored in the BLOCK-INFO slot for
;;; the associated block.
(defstruct (ir2-block (:include block-annotation)
- (:constructor make-ir2-block (block)))
- ;; the IR2-Block's number, which differs from Block's Block-Number
+ (:constructor make-ir2-block (block))
+ (:copier nil))
+ ;; the IR2-BLOCK's number, which differs from BLOCK's BLOCK-NUMBER
;; if any blocks are split. This is assigned by lifetime analysis.
(number nil :type (or index null))
;; information about unknown-values continuations that is used by
;; assign all the more args one LTN number, and all the more results
;; another LTN number. We can do this, since more operands are
;; referenced simultaneously as far as conflict analysis is
- ;; concerned. Note that all these :More TNs will be global TNs.
+ ;; concerned. Note that all these :MORE TNs will be global TNs.
(local-tns (make-array local-tn-limit) :type local-tn-vector)
;; Bit-vectors used during lifetime analysis to keep track of
;; references to local TNs. When indexed by the LTN number, the
:type local-tn-bit-vector)
;; This is similar to the above, but is updated by lifetime flow
;; analysis to have a 1 for LTN numbers of TNs live at the end of
- ;; the block. This takes into account all TNs that aren't :Live.
- (live-in (make-array local-tn-limit :element-type 'bit
- :initial-element 0)
+ ;; the block. This takes into account all TNs that aren't :LIVE.
+ (live-in (make-array local-tn-limit :element-type 'bit :initial-element 0)
:type local-tn-bit-vector)
;; a thread running through the global-conflicts structures for this
;; block, sorted by TN number
;; the assembler label that points to the beginning of the code for
;; this block, or NIL when we haven't assigned a label yet
(%label nil)
- ;; list of Location-Info structures describing all the interesting
+ ;; list of LOCATION-INFO structures describing all the interesting
;; (to the debugger) locations in this block
(locations nil :type list))
(local-tn-count :test (not (zerop local-tn-count)))
(%label :test %label))
-;;; An IR2-Continuation structure is used to annotate continuations
+;;; An IR2-CONTINUATION structure is used to annotate continuations
;;; that are used as a function result continuation or that receive MVs.
(defstruct (ir2-continuation
- (:constructor make-ir2-continuation (primitive-type)))
+ (:constructor make-ir2-continuation (primitive-type))
+ (:copier nil))
;; If this is :DELAYED, then this is a single value continuation for
;; which the evaluation of the use is to be postponed until the
;; evaluation of destination. This can be done for ref nodes or
primitive-type
locs)
-;;; The IR2-Component serves mostly to accumulate non-code information
+;;; An IR2-COMPONENT serves mostly to accumulate non-code information
;;; about the component being compiled.
-(defstruct ir2-component
+(defstruct (ir2-component (:copier nil))
;; the counter used to allocate global TN numbers
(global-tn-counter 0 :type index)
;; NORMAL-TNS is the head of the list of all the normal TNs that
;; overhead that is eventually stuffed in somehow.
(constants (make-array 10 :fill-pointer 0 :adjustable t) :type vector)
;; some kind of info about the component's run-time representation.
- ;; This is filled in by the VM supplied Select-Component-Format function.
+ ;; This is filled in by the VM supplied SELECT-COMPONENT-FORMAT function.
format
;; a list of the ENTRY-INFO structures describing all of the entries
;; into this component. Filled in by entry analysis.
(entries nil :type list)
- ;; Head of the list of :ALIAS TNs in this component, threaded by TN-NEXT.
+ ;; head of the list of :ALIAS TNs in this component, threaded by TN-NEXT
(alias-tns nil :type (or tn null))
;; SPILLED-VOPS is a hashtable translating from "interesting" VOPs
;; to a list of the TNs spilled at that VOP. This is used when
;;; structures are somtimes created before they are initialized, since
;;; IR2 conversion may need to compile a forward reference. In this
;;; case the slots aren't actually initialized until entry analysis runs.
-(defstruct entry-info
- ;; true if this function has a non-null closure environment
+(defstruct (entry-info (:copier nil))
+ ;; Does this function have a non-null closure environment?
(closure-p nil :type boolean)
;; a label pointing to the entry vector for this function, or NIL
;; before ENTRY-ANALYZE runs
;; of the function, a symbol or (SETF <symbol>). Otherwise, this is
;; some string that is intended to be informative.
(name "<not computed>" :type (or simple-string list symbol))
- ;; a string representing the argument list that the function was
- ;; defined with
- (arguments nil :type (or simple-string null))
+ ;; the argument list that the function was defined with.
+ (arguments nil :type list)
;; a function type specifier representing the arguments and results
;; of this function
(type 'function :type (or list (member function))))
-;;; An IR2-ENVIRONMENT is used to annotate non-LET lambdas with their
-;;; passing locations. It is stored in the Environment-Info.
-(defstruct ir2-environment
- ;; the TNs that hold the passed environment within the function.
- ;; This is an alist translating from the NLX-Info or lambda-var to
- ;; the TN that holds the corresponding value within this function.
- ;; This list is in the same order as the ENVIRONMENT-CLOSURE.
- (environment nil :type list)
+;;; An IR2-PHYSENV is used to annotate non-LET LAMBDAs with their
+;;; passing locations. It is stored in the PHYSENV-INFO.
+(defstruct (ir2-physenv (:copier nil))
+ ;; TN info for closed-over things within the function: an alist
+ ;; mapping from NLX-INFOs and LAMBDA-VARs to TNs holding the
+ ;; corresponding thing within this function
+ ;;
+ ;; Elements of this list have a one-to-one correspondence with
+ ;; elements of the PHYSENV-CLOSURE list of the PHYSENV object that
+ ;; links to us.
+ (closure (missing-arg) :type list :read-only t)
;; the TNs that hold the OLD-FP and RETURN-PC within the function.
;; We always save these so that the debugger can do a backtrace,
;; even if the function has no return (and thus never uses them).
;; Null only temporarily.
(old-fp nil :type (or tn null))
(return-pc nil :type (or tn null))
- ;; The passing location for the Return-PC. The return PC is treated
+ ;; The passing location for the RETURN-PC. The return PC is treated
;; differently from the other arguments, since in some
;; implementations we may use a call instruction that requires the
;; return PC to be passed in a particular place.
- (return-pc-pass (required-argument) :type tn)
+ (return-pc-pass (missing-arg) :type tn :read-only t)
;; True if this function has a frame on the number stack. This is
;; set by representation selection whenever it is possible that some
;; function in our tail set will make use of the number stack.
(live-tns nil :type list)
;; a list of all the :DEBUG-ENVIRONMENT TNs live in this environment
(debug-live-tns nil :type list)
- ;; a label that marks the start of elsewhere code for this function.
- ;; Null until this label is assigned by codegen. Used for
+ ;; a label that marks the start of elsewhere code for this function,
+ ;; or null until this label is assigned by codegen. Used for
;; maintaining the debug source map.
(elsewhere-start nil :type (or label null))
;; a label that marks the first location in this function at which
;; from their passing locations, etc. This is the start of the
;; function as far as the debugger is concerned.
(environment-start nil :type (or label null)))
-(defprinter (ir2-environment)
- environment
+(defprinter (ir2-physenv)
+ closure
old-fp
return-pc
return-pc-pass)
;;; A RETURN-INFO is used by GTN to represent the return strategy and
;;; locations for all the functions in a given TAIL-SET. It is stored
;;; in the TAIL-SET-INFO.
-(defstruct return-info
+(defstruct (return-info (:copier nil))
;; The return convention used:
;; -- If :UNKNOWN, we use the standard return convention.
;; -- If :FIXED, we use the known-values convention.
- (kind (required-argument) :type (member :fixed :unknown))
+ (kind (missing-arg) :type (member :fixed :unknown))
;; the number of values returned, or :UNKNOWN if we don't know.
;; COUNT may be known when KIND is :UNKNOWN, since we may choose the
;; standard return convention for other reasons.
- (count (required-argument) :type (or index (member :unknown)))
+ (count (missing-arg) :type (or index (member :unknown)))
;; If count isn't :UNKNOWN, then this is a list of the
;; primitive-types of each value.
(types () :type list)
types
locations)
-(defstruct ir2-nlx-info
+(defstruct (ir2-nlx-info (:copier nil))
;; If the kind is :ENTRY (a lexical exit), then in the home
;; environment, this holds a VALUE-CELL object containing the unwind
;; block pointer. In the other cases nobody directly references the
;; unwind-block, so we leave this slot null.
(home nil :type (or tn null))
- ;; The saved control stack pointer.
- (save-sp (required-argument) :type tn)
- ;; The list of dynamic state save TNs.
+ ;; the saved control stack pointer
+ (save-sp (missing-arg) :type tn)
+ ;; the list of dynamic state save TNs
(dynamic-state (list* (make-stack-pointer-tn)
(make-dynamic-state-tns))
:type list)
- ;; The target label for NLX entry.
+ ;; the target label for NLX entry
(target (gen-label) :type label))
(defprinter (ir2-nlx-info)
home
save-sp
dynamic-state)
-
-;;; FIXME: Delete? (was commented out in CMU CL)
-#|
-;;; The Loop structure holds information about a loop.
-(defstruct (cloop (:conc-name loop-)
- (:predicate loop-p)
- (:constructor make-loop)
- (:copier copy-loop))
- ;; The kind of loop that this is. These values are legal:
- ;;
- ;; :Outer
- ;; This is the outermost loop structure, and represents all the
- ;; code in a component.
- ;;
- ;; :Natural
- ;; A normal loop with only one entry.
- ;;
- ;; :Strange
- ;; A segment of a "strange loop" in a non-reducible flow graph.
- (kind (required-argument) :type (member :outer :natural :strange))
- ;; The first and last blocks in the loop. There may be more than one tail,
- ;; since there may be multiple back branches to the same head.
- (head nil :type (or cblock null))
- (tail nil :type list)
- ;; A list of all the blocks in this loop or its inferiors that have a
- ;; successor outside of the loop.
- (exits nil :type list)
- ;; The loop that this loop is nested within. This is null in the outermost
- ;; loop structure.
- (superior nil :type (or cloop null))
- ;; A list of the loops nested directly within this one.
- (inferiors nil :type list)
- ;; The head of the list of blocks directly within this loop. We must recurse
- ;; on Inferiors to find all the blocks.
- (blocks nil :type (or null cblock)))
-(defprinter (loop)
- kind
- head
- tail
- exits)
-|#
\f
;;;; VOPs and templates
;;; A VOP is a Virtual Operation. It represents an operation and the
;;; operands to the operation.
-(defstruct (vop (:constructor make-vop (block node info args results)))
- ;; VOP-Info structure containing static info about the operation.
+(defstruct (vop (:constructor make-vop (block node info args results))
+ (:copier nil))
+ ;; VOP-INFO structure containing static info about the operation
(info nil :type (or vop-info null))
- ;; The IR2-Block this VOP is in.
- (block (required-argument) :type ir2-block)
+ ;; the IR2-Block this VOP is in
+ (block (missing-arg) :type ir2-block)
;; VOPs evaluated after and before this one. Null at the
;; beginning/end of the block, and temporarily during IR2
;; translation.
(next nil :type (or vop null))
(prev nil :type (or vop null))
- ;; Heads of the TN-Ref lists for operand TNs, linked using the
- ;; Across slot.
+ ;; heads of the TN-REF lists for operand TNs, linked using the
+ ;; ACROSS slot
(args nil :type (or tn-ref null))
(results nil :type (or tn-ref null))
- ;; Head of the list of write refs for each explicitly allocated
- ;; temporary, linked together using the Across slot.
+ ;; head of the list of write refs for each explicitly allocated
+ ;; temporary, linked together using the ACROSS slot
(temps nil :type (or tn-ref null))
- ;; Head of the list of all TN-refs for references in this VOP,
- ;; linked by the Next-Ref slot. There will be one entry for each
+ ;; head of the list of all TN-REFs for references in this VOP,
+ ;; linked by the NEXT-REF slot. There will be one entry for each
;; operand and two (a read and a write) for each temporary.
(refs nil :type (or tn-ref null))
- ;; Stuff that is passed uninterpreted from IR2 conversion to
+ ;; stuff that is passed uninterpreted from IR2 conversion to
;; codegen. The meaning of this slot is totally dependent on the VOP.
codegen-info
- ;; Node that generated this VOP, for keeping track of debug info.
+ ;; the node that generated this VOP, for keeping track of debug info
(node nil :type (or node null))
- ;; Local-TN bit vector representing the set of TNs live after args
+ ;; LOCAL-TN-BIT-VECTOR representing the set of TNs live after args
;; are read and before results are written. This is only filled in
;; when VOP-INFO-SAVE-P is non-null.
(save-set nil :type (or local-tn-bit-vector null)))
;;; A TN-REF object contains information about a particular reference
;;; to a TN. The information in TN-REFs largely determines how TNs are
;;; packed.
-(defstruct (tn-ref (:constructor make-tn-ref (tn write-p)))
+(defstruct (tn-ref (:constructor make-tn-ref (tn write-p))
+ (:copier nil))
;; the TN referenced
- (tn (required-argument) :type tn)
+ (tn (missing-arg) :type tn)
;; Is this is a write reference? (as opposed to a read reference)
(write-p nil :type boolean)
- ;; the link for a list running through all TN-Refs for this TN of
+ ;; the link for a list running through all TN-REFs for this TN of
;; the same kind (read or write)
(next nil :type (or tn-ref null))
;; the VOP where the reference happens, or NIL temporarily
(vop nil :type (or vop null))
- ;; the link for a list of all TN-Refs in VOP, in reverse order of
+ ;; the link for a list of all TN-REFs in VOP, in reverse order of
;; reference
(next-ref nil :type (or tn-ref null))
- ;; the link for a list of the TN-Refs in VOP of the same kind
+ ;; the link for a list of the TN-REFs in VOP of the same kind
;; (argument, result, temp)
(across nil :type (or tn-ref null))
- ;; If true, this is a TN-Ref also in VOP whose TN we would like
+ ;; If true, this is a TN-REF also in VOP whose TN we would like
;; packed in the same location as our TN. Read and write refs are
- ;; always paired: Target in the read points to the write, and
+ ;; always paired: TARGET in the read points to the write, and
;; vice-versa.
(target nil :type (or null tn-ref))
;; the load TN allocated for this operand, if any
;; the arg/result type restrictions. We compute this from the
;; PRIMITIVE-TYPE restrictions to make life easier for IR1 phases
;; that need to anticipate LTN's template selection.
- (type (required-argument) :type function-type)
+ (type (missing-arg) :type fun-type)
;; lists of restrictions on the argument and result types. A
;; restriction may take several forms:
;; -- The restriction * is no restriction at all.
;; the type constraint as a Lisp function type.
;;
;; If RESULT-TYPES is :CONDITIONAL, then this is an IF-FOO style
- ;; conditional that yeilds its result as a control transfer. The
+ ;; conditional that yields its result as a control transfer. The
;; emit function takes two info arguments: the target label and a
;; boolean flag indicating whether to negate the sense of the test.
(arg-types nil :type list)
;; the policy under which this template is the best translation.
;; Note that LTN might use this template under other policies if it
;; can't figure out anything better to do.
- (ltn-policy (required-argument) :type ltn-policy)
+ (ltn-policy (missing-arg) :type ltn-policy)
;; the base cost for this template, given optimistic assumptions
;; such as no operand loading, etc.
- (cost (required-argument) :type index)
+ (cost (missing-arg) :type index)
;; If true, then this is a short noun-like phrase describing what
;; this VOP "does", i.e. the implementation strategy. This is for
;; use in efficiency notes.
(note nil :type (or string null))
- ;; The number of trailing arguments to VOP or %PRIMITIVE that we
+ ;; the number of trailing arguments to VOP or %PRIMITIVE that we
;; bundle into a list and pass into the emit function. This provides
;; a way to pass uninterpreted stuff directly to the code generator.
(info-arg-count 0 :type index)
;; Two values are returned: the first and last VOP emitted. This vop
;; sequence must be linked into the VOP Next/Prev chain for the
;; block. At least one VOP is always emitted.
- (emit-function (required-argument) :type function))
+ (emit-function (missing-arg) :type function))
(defprinter (template)
name
arg-types
(def!struct (vop-info
(:include template)
(:make-load-form-fun ignore-it))
- ;; side-effects of this VOP and side-effects that affect the value
+ ;; side effects of this VOP and side effects that affect the value
;; of this VOP
- (effects (required-argument) :type attributes)
- (affected (required-argument) :type attributes)
+ (effects (missing-arg) :type attributes)
+ (affected (missing-arg) :type attributes)
;; If true, causes special casing of TNs live after this VOP that
;; aren't results:
;; -- If T, all such TNs that are allocated in a SC with a defined
;; save-sc will be saved in a TN in the save SC before the VOP
;; and restored after the VOP. This is used by call VOPs. A bit
;; vector representing the live TNs is stored in the VOP-SAVE-SET.
- ;; -- If :Force-To-Stack, all such TNs will made into :Environment TNs
+ ;; -- If :FORCE-TO-STACK, all such TNs will made into :ENVIRONMENT TNs
;; and forced to be allocated in SCs without any save-sc. This is
;; used by NLX entry vops.
- ;; -- If :Compute-Only, just compute the save set, don't do any saving.
+ ;; -- If :COMPUTE-ONLY, just compute the save set, don't do any saving.
;; This is used to get the live variables for debug info.
(save-p nil :type (member t nil :force-to-stack :compute-only))
;; info for automatic emission of move-arg VOPs by representation
;; selection. If NIL, then do nothing special. If non-null, then
;; there must be a more arg. Each more arg is moved to its passing
- ;; location using the appropriate representation-specific
- ;; move-argument VOP. The first (fixed) argument must be the
- ;; control-stack frame pointer for the frame to move into. The first
- ;; info arg is the list of passing locations.
+ ;; location using the appropriate representation-specific MOVE-ARG
+ ;; VOP. The first (fixed) argument must be the control-stack frame
+ ;; pointer for the frame to move into. The first info arg is the
+ ;; list of passing locations.
;;
;; Additional constraints depend on the value:
;;
(arg-load-scs nil :type list)
(result-load-scs nil :type list)
;; if true, a function that is called with the VOP to do operand
- ;; targeting. This is done by modifiying the TN-Ref-Target slots in
- ;; the TN-Refs so that they point to other TN-Refs in the same VOP.
- (target-function nil :type (or null function))
+ ;; targeting. This is done by modifying the TN-REF-TARGET slots in
+ ;; the TN-REFS so that they point to other TN-REFS in the same VOP.
+ (target-fun nil :type (or null function))
;; a function that emits assembly code for a use of this VOP when it
- ;; is called with the VOP structure. Null if this VOP has no
- ;; specified generator (i.e. it exists only to be inherited by other
- ;; VOPs.)
+ ;; is called with the VOP structure. This is null if this VOP has no
+ ;; specified generator (i.e. if it exists only to be inherited by
+ ;; other VOPs).
(generator-function nil :type (or function null))
;; a list of things that are used to parameterize an inherited
;; generator. This allows the same generator function to be used for
(temps nil :type (or null (specializable-vector (unsigned-byte 16))))
;; the order all the refs for this vop should be put in. Each
;; operand is assigned a number in the following ordering: args,
- ;; more-args, results, more-results, temps This vector represents
+ ;; more-args, results, more-results, temps. This vector represents
;; the order the operands should be put into in the next-ref link.
(ref-ordering nil :type (or null (specializable-vector (unsigned-byte 8))))
;; a vector of the various targets that should be done. Each element
- ;; encodes the source ref (shifted 8) and the dest ref index.
+ ;; encodes the source ref (shifted 8, it is also encoded in
+ ;; MAX-VOP-TN-REFS) and the dest ref index.
(targets nil :type (or null (specializable-vector (unsigned-byte 16)))))
\f
;;;; SBs and SCs
;;; Boxed-Reg: any boxed register (any boxed object)
;;; Unboxed-Reg: any unboxed register (any unboxed object)
;;; Float-Reg, Double-Float-Reg: float in FP register.
-;;; Stack: boxed object on the stack (on cstack)
+;;; Stack: boxed object on the stack (on control stack)
;;; Word: any 32bit unboxed object on nstack.
;;; Double: any 64bit unboxed object on nstack.
;;; The SB structure represents the global information associated with
;;; a storage base.
(def!struct (sb (:make-load-form-fun just-dump-it-normally))
- ;; Name, for printing and reference.
+ ;; name, for printing and reference
(name nil :type symbol)
- ;; The kind of storage base (which determines the packing
- ;; algorithm).
+ ;; the kind of storage base (which determines the packing
+ ;; algorithm)
(kind :non-packed :type (member :finite :unbounded :non-packed))
- ;; The number of elements in the SB. If finite, this is the total
+ ;; the number of elements in the SB. If finite, this is the total
;; size. If unbounded, this is the size that the SB is initially
;; allocated at.
(size 0 :type index))
(defprinter (sb)
name)
-;;; The Finite-SB structure holds information needed by the packing
-;;; algorithm for finite SBs.
+;;; A FINITE-SB holds information needed by the packing algorithm for
+;;; finite SBs.
(def!struct (finite-sb (:include sb))
- ;; The number of locations currently allocated in this SB.
+ ;; the number of locations currently allocated in this SB
(current-size 0 :type index)
- ;; The last location packed in, used by pack to scatter TNs to
+ ;; the last location packed in, used by pack to scatter TNs to
;; prevent a few locations from getting all the TNs, and thus
- ;; getting overcrowded, reducing the possiblilities for targeting.
+ ;; getting overcrowded, reducing the possibilities for targeting.
(last-offset 0 :type index)
- ;; A vector containing, for each location in this SB, a vector
+ ;; a vector containing, for each location in this SB, a vector
;; indexed by IR2 block numbers, holding local conflict bit vectors.
;; A TN must not be packed in a given location within a particular
;; block if the LTN number for that TN in that block corresponds to
;; a set bit in the bit-vector.
(conflicts '#() :type simple-vector)
- ;; A vector containing, for each location in this SB, a bit-vector
+ ;; a vector containing, for each location in this SB, a bit-vector
;; indexed by IR2 block numbers. If the bit corresponding to a block
;; is set, then the location is in use somewhere in the block, and
;; thus has a conflict for always-live TNs.
(always-live '#() :type simple-vector)
- ;; A vector containing the TN currently live in each location in the
+ ;; a vector containing the TN currently live in each location in the
;; SB, or NIL if the location is unused. This is used during load-tn pack.
(live-tns '#() :type simple-vector)
- ;; The number of blocks for which the ALWAYS-LIVE and CONFLICTS
+ ;; the number of blocks for which the ALWAYS-LIVE and CONFLICTS
;; might not be virgin, and thus must be reinitialized when PACK
;; starts. Less then the length of those vectors when not all of the
;; length was used on the previously packed component.
(last-block-count 0 :type index))
;;; the SC structure holds the storage base that storage is allocated
-;;; in and information used to select locations within the SB.
-(defstruct sc
- ;; Name, for printing and reference.
+;;; in and information used to select locations within the SB
+(defstruct (sc (:copier nil))
+ ;; name, for printing and reference
(name nil :type symbol)
- ;; The number used to index SC cost vectors.
+ ;; the number used to index SC cost vectors
(number 0 :type sc-number)
- ;; The storage base that this SC allocates storage from.
+ ;; the storage base that this SC allocates storage from
(sb nil :type (or sb null))
- ;; The size of elements in this SC, in units of locations in the SB.
+ ;; the size of elements in this SC, in units of locations in the SB
(element-size 0 :type index)
- ;; If our SB is finite, a list of the locations in this SC.
+ ;; if our SB is finite, a list of the locations in this SC
(locations nil :type list)
- ;; A list of the alternate (save) SCs for this SC.
+ ;; a list of the alternate (save) SCs for this SC
(alternate-scs nil :type list)
- ;; A list of the constant SCs that can me moved into this SC.
+ ;; a list of the constant SCs that can me moved into this SC
(constant-scs nil :type list)
- ;; True if this values in this SC needs to be saved across calls.
+ ;; true if the values in this SC needs to be saved across calls
(save-p nil :type boolean)
- ;; Vectors mapping from SC numbers to information about how to load
- ;; from the index SC to this one. Move-Functions holds the names of
- ;; the functions used to do loading, and Load-Costs holds the cost
- ;; of the corresponding Move-Functions. If loading is impossible,
- ;; then the entries are NIL. Load-Costs is initialized to have a 0
+ ;; vectors mapping from SC numbers to information about how to load
+ ;; from the index SC to this one. MOVE-FUNS holds the names of
+ ;; the functions used to do loading, and LOAD-COSTS holds the cost
+ ;; of the corresponding move functions. If loading is impossible,
+ ;; then the entries are NIL. LOAD-COSTS is initialized to have a 0
;; for this SC.
- (move-functions (make-array sc-number-limit :initial-element nil)
- :type sc-vector)
+ (move-funs (make-array sc-number-limit :initial-element nil)
+ :type sc-vector)
(load-costs (make-array sc-number-limit :initial-element nil)
:type sc-vector)
- ;; A vector mapping from SC numbers to possibly
+ ;; a vector mapping from SC numbers to possibly
;; representation-specific move and coerce VOPs. Each entry is a
;; list of VOP-INFOs for VOPs that move/coerce an object in the
;; index SC's representation into this SC's representation. This
;; that we are setting up for unknown-values return.
(move-vops (make-array sc-number-limit :initial-element nil)
:type sc-vector)
- ;; The costs corresponding to the MOVE-VOPS. Separate because this
+ ;; the costs corresponding to the MOVE-VOPS. Separate because this
;; info is needed at meta-compile time, while the MOVE-VOPs don't
;; exist till load time. If no move is defined, then the entry is
;; NIL.
(move-costs (make-array sc-number-limit :initial-element nil)
:type sc-vector)
- ;; Similar to Move-VOPs, except that we only ever use the entries
+ ;; similar to Move-VOPs, except that we only ever use the entries
;; for this SC and its alternates, since we never combine complex
;; representation conversion with argument passing.
(move-arg-vops (make-array sc-number-limit :initial-element nil)
:type sc-vector)
- ;; True if this SC or one of its alternates in in the NUMBER-STACK SB.
+ ;; true if this SC or one of its alternates in in the NUMBER-STACK SB.
(number-stack-p nil :type boolean)
- ;; Alignment restriction. The offset must be an even multiple of this.
+ ;; alignment restriction. The offset must be an even multiple of this.
(alignment 1 :type (and index (integer 1)))
- ;; A list of locations that we avoid packing in during normal
+ ;; a list of locations that we avoid packing in during normal
;; register allocation to ensure that these locations will be free
;; for operand loading. This prevents load-TN packing from thrashing
;; by spilling a lot.
(defstruct (tn (:include sset-element)
(:constructor make-random-tn)
- (:constructor make-tn (number kind primitive-type sc)))
+ (:constructor make-tn (number kind primitive-type sc))
+ (:copier nil))
;; The kind of TN this is:
;;
;; :NORMAL
;;
;; :SAVE
;; :SAVE-ONCE
- ;; A TN used for saving a :Normal TN across function calls. The
+ ;; A TN used for saving a :NORMAL TN across function calls. The
;; lifetime information slots are unitialized: get the original
- ;; TN our of the SAVE-TN slot and use it for conflicts. Save-Once
- ;; is like :Save, except that it is only save once at the single
+ ;; TN our of the SAVE-TN slot and use it for conflicts. SAVE-ONCE
+ ;; is like :SAVE, except that it is only save once at the single
;; writer of the original TN.
;;
;; :SPECIFIED-SAVE
;; determination method.
;;
;; :CONSTANT
- ;; Represents a constant, with TN-Leaf a Constant leaf. Lifetime
+ ;; Represents a constant, with TN-LEAF a CONSTANT leaf. Lifetime
;; information isn't computed, since the value isn't allocated by
;; pack, but is instead generated as a load at each use. Since
- ;; lifetime analysis isn't done on :Constant TNs, they don't have
- ;; Local-Numbers and similar stuff.
+ ;; lifetime analysis isn't done on :CONSTANT TNs, they don't have
+ ;; LOCAL-NUMBERs and similar stuff.
;;
;; :ALIAS
;; A special kind of TN used to represent initialization of local
;; as :NORMAL, but then at the end merges the conflict info into
;; the original TN and replaces all uses of the alias with the
;; original TN. SAVE-TN holds the aliased TN.
- (kind (required-argument)
+ (kind (missing-arg)
:type (member :normal :environment :debug-environment
:save :save-once :specified-save :load :constant
:component :alias))
- ;; The primitive-type for this TN's value. Null in restricted or
+ ;; the primitive-type for this TN's value. Null in restricted or
;; wired TNs.
(primitive-type nil :type (or primitive-type null))
;; If this TN represents a variable or constant, then this is the
;; corresponding Leaf.
(leaf nil :type (or leaf null))
- ;; Thread that links TNs together so that we can find them.
+ ;; thread that links TNs together so that we can find them
(next nil :type (or tn null))
- ;; Head of TN-Ref lists for reads and writes of this TN.
+ ;; head of TN-Ref lists for reads and writes of this TN
(reads nil :type (or tn-ref null))
(writes nil :type (or tn-ref null))
- ;; A link we use when building various temporary TN lists.
+ ;; a link we use when building various temporary TN lists
(next* nil :type (or tn null))
- ;; Some block that contains a reference to this TN, or Nil if we
+ ;; some block that contains a reference to this TN, or NIL if we
;; haven't seen any reference yet. If the TN is local, then this is
;; the block it is local to.
(local nil :type (or ir2-block null))
;; number during the conflicts analysis of that block. If the TN has
;; no local number within the block, then this is Nil.
(local-number nil :type (or local-tn-number null))
- ;; If a local TN, a bit-vector with 1 for the local-number of every
- ;; TN that we conflict with.
- (local-conflicts (make-array local-tn-limit :element-type 'bit
+ ;; If this object is a local TN, this slot is a bit-vector with 1
+ ;; for the local-number of every TN that we conflict with.
+ (local-conflicts (make-array local-tn-limit
+ :element-type 'bit
:initial-element 0)
:type local-tn-bit-vector)
- ;; Head of the list of Global-Conflicts structures for a global TN.
+ ;; head of the list of GLOBAL-CONFLICTS structures for a global TN.
;; This list is sorted by block number (i.e. reverse DFO), allowing
;; the intersection between the lifetimes for two global TNs to be
;; easily found. If null, then this TN is a local TN.
;; After pack, the SC we packed into. Beforehand, the SC we want to
;; pack into, or null if we don't know.
(sc nil :type (or sc null))
- ;; The offset within the SB that this TN is packed into. This is what
- ;; indicates that the TN is packed.
+ ;; the offset within the SB that this TN is packed into. This is what
+ ;; indicates that the TN is packed
(offset nil :type (or index null))
- ;; Some kind of info about how important this TN is.
+ ;; some kind of info about how important this TN is
(cost 0 :type fixnum)
- ;; If a :ENVIRONMENT or :DEBUG-ENVIRONMENT TN, this is the environment that
- ;; the TN is live throughout.
- (environment nil :type (or environment null)))
+ ;; If a :ENVIRONMENT or :DEBUG-ENVIRONMENT TN, this is the
+ ;; physical environment that the TN is live throughout.
+ (physenv nil :type (or physenv null)))
(def!method print-object ((tn tn) stream)
(print-unreadable-object (tn stream :type t)
;; KLUDGE: The distinction between PRINT-TN and PRINT-OBJECT on TN is
;; not very mnemonic. -- WHN 20000124
- (print-tn tn stream)))
+ (print-tn-guts tn stream)))
;;; The GLOBAL-CONFLICTS structure represents the conflicts for global
;;; TNs. Each global TN has a list of these structures, one for each
;;; lifetime analysis to represent the set of TNs live at the start of
;;; the IR2 block.
(defstruct (global-conflicts
- (:constructor make-global-conflicts (kind tn block number)))
- ;; The IR2-Block that this structure represents the conflicts for.
- (block (required-argument) :type ir2-block)
- ;; Thread running through all the Global-Conflict for Block. This
- ;; thread is sorted by TN number.
- (next nil :type (or global-conflicts null))
- ;; The way that TN is used by Block:
- ;;
- ;; :READ
- ;; The TN is read before it is written. It starts the block live,
- ;; but is written within the block.
- ;;
- ;; :WRITE
- ;; The TN is written before any read. It starts the block dead,
- ;; and need not have a read within the block.
- ;;
- ;; :READ-ONLY
- ;; The TN is read, but never written. It starts the block live,
- ;; and is not killed by the block. Lifetime analysis will promote
- ;; :Read-Only TNs to :Live if they are live at the block end.
- ;;
- ;; :LIVE
- ;; The TN is not referenced. It is live everywhere in the block.
+ (:constructor make-global-conflicts (kind tn block number))
+ (:copier nil))
+ ;; the IR2-BLOCK that this structure represents the conflicts for
+ (block (missing-arg) :type ir2-block)
+ ;; thread running through all the GLOBAL-CONFLICTSs for BLOCK. This
+ ;; thread is sorted by TN number
+ (next-blockwise nil :type (or global-conflicts null))
+ ;; the way that TN is used by BLOCK
+ ;;
+ ;; :READ
+ ;; The TN is read before it is written. It starts the block live,
+ ;; but is written within the block.
+ ;;
+ ;; :WRITE
+ ;; The TN is written before any read. It starts the block dead,
+ ;; and need not have a read within the block.
+ ;;
+ ;; :READ-ONLY
+ ;; The TN is read, but never written. It starts the block live,
+ ;; and is not killed by the block. Lifetime analysis will promote
+ ;; :READ-ONLY TNs to :LIVE if they are live at the block end.
+ ;;
+ ;; :LIVE
+ ;; The TN is not referenced. It is live everywhere in the block.
(kind :read-only :type (member :read :write :read-only :live))
- ;; A local conflicts vector representing conflicts with TNs live in
- ;; Block. The index for the local TN number of each TN we conflict
- ;; with in this block is 1. To find the full conflict set, the :Live
- ;; TNs for Block must also be included. This slot is not meaningful
- ;; when Kind is :Live.
+ ;; a local conflicts vector representing conflicts with TNs live in
+ ;; BLOCK. The index for the local TN number of each TN we conflict
+ ;; with in this block is 1. To find the full conflict set, the :LIVE
+ ;; TNs for BLOCK must also be included. This slot is not meaningful
+ ;; when KIND is :LIVE.
(conflicts (make-array local-tn-limit
:element-type 'bit
:initial-element 0)
:type local-tn-bit-vector)
- ;; The TN we are recording conflicts for.
- (tn (required-argument) :type tn)
- ;; Thread through all the Global-Conflicts for TN.
- (tn-next nil :type (or global-conflicts null))
- ;; TN's local TN number in Block. :Live TNs don't have local numbers.
+ ;; the TN we are recording conflicts for.
+ (tn (missing-arg) :type tn)
+ ;; thread through all the GLOBAL-CONFLICTSs for TN
+ (next-tnwise nil :type (or global-conflicts null))
+ ;; TN's local TN number in BLOCK. :LIVE TNs don't have local numbers.
(number nil :type (or local-tn-number null)))
(defprinter (global-conflicts)
tn
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