;;; COMPONENT-INFO
;;; Holds the IR2-COMPONENT structure.
;;;
-;;; CONTINUATION-INFO
-;;; Holds the IR2-CONTINUATION structure. Continuations whose
-;;; values aren't used won't have any.
+;;; LVAR-INFO
+;;; Holds the IR2-LVAR structure. LVARs whose values aren't used
+;;; won't have any. XXX
;;;
;;; CLEANUP-INFO
;;; If non-null, then a TN in which the affected dynamic
;;;
;;; BASIC-COMBINATION-INFO
;;; The template chosen by LTN, or
-;;; :FULL if this is definitely a full call.
-;;; :FUNNY if this is an oddball thing with IR2-convert.
-;;; :LOCAL if this is a local call.
+;;; :FULL if this is definitely a full call.
+;;; :FUNNY if this is an oddball thing with IR2-convert.
+;;; :LOCAL if this is a local call.
;;;
;;; NODE-TAIL-P
;;; After LTN analysis, this is true only in combination nodes that are
;;; 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))
- (:copier nil))
+ (: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
- ;; stack analysis to do stack simulation. An UNKNOWN-VALUES
- ;; continuation is PUSHED if its DEST is in another block.
- ;; Similarly, a continuation is POPPED if its DEST is in this block
- ;; but has its uses elsewhere. The continuations are in the order
- ;; that are pushed/popped in the block. Note that the args to a
- ;; single MV-COMBINATION appear reversed in POPPED, since we must
- ;; effectively pop the last argument first. All pops must come
- ;; before all pushes (although internal MV uses may be interleaved.)
- ;; POPPED is computed by LTN, and PUSHED is computed by stack
- ;; analysis.
+ ;; information about unknown-values LVARs that is used by stack
+ ;; analysis to do stack simulation. An UNKNOWN-VALUES LVAR is PUSHED
+ ;; if its DEST is in another block. Similarly, a LVAR is POPPED if
+ ;; its DEST is in this block but has its uses elsewhere. The LVARs
+ ;; are in the order that are pushed/popped in the block. Note that
+ ;; the args to a single MV-COMBINATION appear reversed in POPPED,
+ ;; since we must effectively pop the last argument first. All pops
+ ;; must come before all pushes (although internal MV uses may be
+ ;; interleaved.) POPPED is computed by LTN, and PUSHED is computed
+ ;; by stack analysis.
(pushed () :type list)
(popped () :type list)
;; the result of stack analysis: lists of all the unknown-values
- ;; continuations on the stack at the block start and end, topmost
- ;; continuation first.
+ ;; LVARs on the stack at the block start and end, topmost LVAR
+ ;; first.
(start-stack () :type list)
(end-stack () :type list)
;; the first and last VOP in this block. If there are none, both
;; index for a TN is non-zero in WRITTEN if it is ever written in
;; the block, and in LIVE-OUT if the first reference is a read.
(written (make-array local-tn-limit :element-type 'bit
- :initial-element 0)
- :type local-tn-bit-vector)
+ :initial-element 0)
+ :type local-tn-bit-vector)
(live-out (make-array local-tn-limit :element-type 'bit)
- :type local-tn-bit-vector)
+ :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)
- :type local-tn-bit-vector)
+ :type local-tn-bit-vector)
;; a thread running through the global-conflicts structures for this
;; block, sorted by TN number
(global-tns nil :type (or global-conflicts null))
;; 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)
+ ;; the assembler label that points to the trampoline for this block,
+ ;; or NIL if unassigned yet. Only meaningful for local call targets.
+ (%trampoline-label nil)
+ ;; T if the preceding block assumes it can drop thru to %label
+ (dropped-thru-to nil)
;; 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
-;;; that are used as a function result continuation or that receive MVs.
-(defstruct (ir2-continuation
- (: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
- ;; predicates whose destination is an IF.
- ;;
- ;; If this is :FIXED, then this continuation has a fixed number of
- ;; values, with the TNs in LOCS.
- ;;
- ;; If this is :UNKNOWN, then this is an unknown-values continuation,
- ;; using the passing locations in LOCS.
- ;;
- ;; If this is :UNUSED, then this continuation should never actually
- ;; be used as the destination of a value: it is only used
- ;; tail-recursively.
+;;; An IR2-LVAR structure is used to annotate LVARs that are used as a
+;;; function result LVARs or that receive MVs.
+(defstruct (ir2-lvar
+ (:constructor make-ir2-lvar (primitive-type))
+ (:copier nil))
+ ;; If this is :DELAYED, then this is a single value LVAR for which
+ ;; the evaluation of the use is to be postponed until the evaluation
+ ;; of destination. This can be done for ref nodes or predicates
+ ;; whose destination is an IF.
+ ;;
+ ;; If this is :FIXED, then this LVAR has a fixed number of values,
+ ;; with the TNs in LOCS.
+ ;;
+ ;; If this is :UNKNOWN, then this is an unknown-values LVAR, using
+ ;; the passing locations in LOCS.
+ ;;
+ ;; If this is :UNUSED, then this LVAR should never actually be used
+ ;; as the destination of a value: it is only used tail-recursively.
(kind :fixed :type (member :delayed :fixed :unknown :unused))
- ;; The primitive-type of the first value of this continuation. This
- ;; is primarily for internal use during LTN, but it also records the
+ ;; The primitive-type of the first value of this LVAR. This is
+ ;; primarily for internal use during LTN, but it also records the
;; type restriction on delayed references. In multiple-value
;; contexts, this is null to indicate that it is meaningless. This
- ;; is always (primitive-type (continuation-type cont)), which may be
- ;; more restrictive than the tn-primitive-type of the value TN. This
- ;; is becase the value TN must hold any possible type that could be
- ;; computed (before type checking.)
+ ;; is always (primitive-type (lvar-type cont)), which may be more
+ ;; restrictive than the tn-primitive-type of the value TN. This is
+ ;; becase the value TN must hold any possible type that could be
+ ;; computed (before type checking.) XXX
(primitive-type nil :type (or primitive-type null))
- ;; Locations used to hold the values of the continuation. If the
- ;; number of values if fixed, then there is one TN per value. If the
- ;; number of values is unknown, then this is a two-list of TNs
- ;; holding the start of the values glob and the number of values.
- ;; Note that since type checking is the responsibility of the values
- ;; receiver, these TNs primitive type is only based on the proven
- ;; type information.
- (locs nil :type list))
+ ;; Locations used to hold the values of the LVAR. If the number of
+ ;; values if fixed, then there is one TN per value. If the number of
+ ;; values is unknown, then this is a two-list of TNs holding the
+ ;; start of the values glob and the number of values. Note that
+ ;; since type checking is the responsibility of the values receiver,
+ ;; these TNs primitive type is only based on the proven type
+ ;; information.
+ (locs nil :type list)
+ (stack-pointer nil :type (or tn null)))
-(defprinter (ir2-continuation)
+(defprinter (ir2-lvar)
kind
primitive-type
locs)
;; SC and OFFSET are already filled in.
;;
;; CONSTANT-TNs are non-packed TNs that represent constants.
- ;; :CONSTANT TNs may eventually be converted to :CACHED-CONSTANT
- ;; normal TNs.
- ;;
- ;; FIXME: What is :CACHED-CONSTANT?
(normal-tns nil :type (or tn null))
(restricted-tns nil :type (or tn null))
(wired-tns nil :type (or tn null))
;; Is replaced by the code pointer for the specified function.
;; This is how compiled code (including DEFUN) gets its hands on
;; a function. <function> is the XEP lambda for the called
- ;; function; its LEAF-INFO should be an ENTRY-INFO structure.
+ ;; function; its LEAF-INFO should be an ENTRY-INFO structure.
;;
;; (:label . <label>)
;; Is replaced with the byte offset of that label from the start
;;; An ENTRY-INFO condenses all the information that the dumper needs
;;; to create each XEP's function entry data structure. ENTRY-INFO
-;;; 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.
+;;; structures are sometimes 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 (:copier nil))
- ;; Does this function have a non-null closure environment?
- (closure-p nil :type boolean)
+ ;; TN, containing closure (if needed) for this function in the home
+ ;; environment.
+ (closure-tn nil :type (or null tn))
;; a label pointing to the entry vector for this function, or NIL
;; before ENTRY-ANALYZE runs
(offset nil :type (or label null))
(arguments nil :type list)
;; a function type specifier representing the arguments and results
;; of this function
- (type 'function :type (or list (member function))))
+ (type 'function :type (or list (member function)))
+ ;; docstring and/or xref information for the XEP
+ (info nil :type (or null simple-vector string (cons string simple-vector))))
;;; An IR2-PHYSENV is used to annotate non-LET LAMBDAs with their
;;; passing locations. It is stored in the PHYSENV-INFO.
(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)
+ (make-dynamic-state-tns))
+ :type list)
;; the target label for NLX entry
(target (gen-label) :type label))
(defprinter (ir2-nlx-info)
home
save-sp
dynamic-state)
+
+(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 (missing-arg) :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)
+ (depth 0 :type fixnum)
+ ;; 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))
+ ;; Backend saves the first emitted block of each loop here.
+ (info nil))
+
+(defprinter (cloop :conc-name loop-)
+ kind
+ head
+ tail
+ exits
+ depth)
\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))
- (:copier nil))
+(def!struct (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
;;; 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))
- (:copier nil))
+(def!struct (tn-ref (:constructor make-tn-ref (tn write-p))
+ (:copier nil))
;; the TN referenced
(tn (missing-arg) :type tn)
;; Is this is a write reference? (as opposed to a read reference)
;;; A TEMPLATE object represents a particular IR2 coding strategy for
;;; a known function.
(def!struct (template (:constructor nil)
- #-sb-xc-host (:pure t))
+ #-sb-xc-host (:pure t))
;; the symbol name of this VOP. This is used when printing the VOP
;; and is also used to provide a handle for definition and
;; translation.
;; lists of restrictions on the argument and result types. A
;; restriction may take several forms:
;; -- The restriction * is no restriction at all.
- ;; -- A restriction (:OR <primitive-type>*) means that the operand
+ ;; -- A restriction (:OR <primitive-type>*) means that the operand
;; must have one of the specified primitive types.
;; -- A restriction (:CONSTANT <predicate> <type-spec>) means that the
;; argument (not a result) must be a compile-time constant that
;; 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.
+ ;;
+ ;; If RESULT-TYPES is a cons whose car is :CONDITIONAL, then this is
+ ;; a flag-setting VOP. The rest is a list of condition descriptors to
+ ;; be interpreted by the BRANCH-IF VOP (see $ARCH/pred.lisp).
(arg-types nil :type list)
- (result-types nil :type (or list (member :conditional)))
+ (result-types nil :type (or list (member :conditional) (cons (eql :conditional))))
;; the primitive type restriction applied to each extra argument or
;; result following the fixed operands. If NIL, no extra
;; args/results are allowed. Otherwise, either * or a (:OR ...) list
;; 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)
- ;; a function that emits the VOPs for this template. Arguments:
- ;; 1] Node for source context.
- ;; 2] IR2-BLOCK that we place the VOP in.
- ;; 3] This structure.
- ;; 4] Head of argument TN-REF list.
- ;; 5] Head of result TN-REF list.
- ;; 6] If INFO-ARG-COUNT is non-zero, then a list of the magic
- ;; arguments.
- ;;
- ;; 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 (missing-arg) :type function))
+ (info-arg-count 0 :type index))
(defprinter (template)
name
arg-types
;;; virtual operation. We include TEMPLATE so that functions with a
;;; direct VOP equivalent can be translated easily.
(def!struct (vop-info
- (:include template)
- (:make-load-form-fun ignore-it))
+ (:include template)
+ (:make-load-form-fun ignore-it))
;; side effects of this VOP and side effects that affect the value
;; of this VOP
(effects (missing-arg) :type attributes)
;; counts as one, and all the more args/results together count as 1.
(num-args 0 :type index)
(num-results 0 :type index)
- ;; a vector of the temporaries the vop needs. See EMIT-GENERIC-VOP
+ ;; a vector of the temporaries the vop needs. See EMIT-VOP
;; in vmdef for information on how the temps are encoded.
(temps nil :type (or null (specializable-vector (unsigned-byte 16))))
;; the order all the refs for this vop should be put in. Each
;;; A FINITE-SB holds information needed by the packing algorithm for
;;; finite SBs.
(def!struct (finite-sb (:include sb))
+ ;; the minimum number of location by which to grow this SB
+ ;; if it is :unbounded
+ (size-increment 1 :type index)
+ ;; current-size must always be a multiple of this. It is assumed
+ ;; to be a power of two.
+ (size-alignment 1 :type index)
;; 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
;; 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)
+ (always-live-count '#() :type simple-vector)
;; 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 SC structure holds the storage base that storage is allocated
;;; in and information used to select locations within the SB
-(defstruct (sc (:copier nil))
+(def!struct (sc (:copier nil))
;; name, for printing and reference
(name nil :type symbol)
;; the number used to index SC cost vectors
;; then the entries are NIL. LOAD-COSTS is initialized to have a 0
;; for this SC.
(move-funs (make-array sc-number-limit :initial-element nil)
- :type sc-vector)
+ :type sc-vector)
(load-costs (make-array sc-number-limit :initial-element nil)
- :type sc-vector)
+ :type sc-vector)
;; 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
;; already be live TNs wired in those locations holding the values
;; that we are setting up for unknown-values return.
(move-vops (make-array sc-number-limit :initial-element nil)
- :type sc-vector)
+ :type sc-vector)
;; 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)
+ :type sc-vector)
;; 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)
+ :type sc-vector)
;; 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.
+ ;; this must be a power of two.
(alignment 1 :type (and index (integer 1)))
;; a list of locations that we avoid packing in during normal
;; register allocation to ensure that these locations will be free
\f
;;;; TNs
-(defstruct (tn (:include sset-element)
- (:constructor make-random-tn)
- (:constructor make-tn (number kind primitive-type sc))
- (:copier nil))
+(def!struct (tn (:include sset-element)
+ (:constructor make-random-tn)
+ (:constructor make-tn (number kind primitive-type sc))
+ (:copier nil))
;; The kind of TN this is:
;;
;; :NORMAL
- ;; A normal, non-constant TN, representing a variable or temporary.
- ;; Lifetime information is computed so that packing can be done.
+ ;; A normal, non-constant TN, representing a variable or temporary.
+ ;; Lifetime information is computed so that packing can be done.
;;
;; :ENVIRONMENT
- ;; A TN that has hidden references (debugger or NLX), and thus must be
- ;; allocated for the duration of the environment it is referenced in.
+ ;; A TN that has hidden references (debugger or NLX), and thus must be
+ ;; allocated for the duration of the environment it is referenced in.
;;
;; :DEBUG-ENVIRONMENT
- ;; Like :ENVIRONMENT, but is used for TNs that we want to be able to
- ;; target to/from and that don't absolutely have to be live
- ;; everywhere. These TNs are live in all blocks in the environment
- ;; that don't reference this TN.
+ ;; Like :ENVIRONMENT, but is used for TNs that we want to be able to
+ ;; target to/from and that don't absolutely have to be live
+ ;; everywhere. These TNs are live in all blocks in the environment
+ ;; that don't reference this TN.
;;
;; :COMPONENT
- ;; A TN that implicitly conflicts with all other TNs. No conflict
- ;; info is computed.
+ ;; A TN that implicitly conflicts with all other TNs. No conflict
+ ;; info is computed.
;;
;; :SAVE
;; :SAVE-ONCE
- ;; 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
- ;; writer of the original TN.
+ ;; A TN used for saving a :NORMAL TN across function calls. The
+ ;; lifetime information slots are unitialized: get the original
+ ;; TN out 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
- ;; A TN that was explicitly specified as the save TN for another TN.
- ;; When we actually get around to doing the saving, this will be
- ;; changed to :SAVE or :SAVE-ONCE.
+ ;; A TN that was explicitly specified as the save TN for another TN.
+ ;; When we actually get around to doing the saving, this will be
+ ;; changed to :SAVE or :SAVE-ONCE.
;;
;; :LOAD
- ;; A load-TN used to compute an argument or result that is
- ;; restricted to some finite SB. Load TNs don't have any conflict
- ;; information. Load TN pack uses a special local conflict
- ;; determination method.
+ ;; A load-TN used to compute an argument or result that is
+ ;; restricted to some finite SB. Load TNs don't have any conflict
+ ;; information. Load TN pack uses a special local conflict
+ ;; determination method.
;;
;; :CONSTANT
- ;; 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.
+ ;; 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.
;;
;; :ALIAS
- ;; A special kind of TN used to represent initialization of local
- ;; call arguments in the caller. It provides another name for the
- ;; argument TN so that lifetime analysis doesn't get confused by
- ;; self-recursive calls. Lifetime analysis treats this the same
- ;; 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.
+ ;; A special kind of TN used to represent initialization of local
+ ;; call arguments in the caller. It provides another name for the
+ ;; argument TN so that lifetime analysis doesn't get confused by
+ ;; self-recursive calls. Lifetime analysis treats this the same
+ ;; 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 (missing-arg)
- :type (member :normal :environment :debug-environment
- :save :save-once :specified-save :load :constant
- :component :alias))
+ :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
;; wired TNs.
(primitive-type nil :type (or primitive-type null))
;; 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)
+ :element-type 'bit
+ :initial-element 0)
+ :type local-tn-bit-vector)
;; 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
(cost 0 :type fixnum)
;; If a :ENVIRONMENT or :DEBUG-ENVIRONMENT TN, this is the
;; physical environment that the TN is live throughout.
- (physenv nil :type (or physenv null)))
+ (physenv nil :type (or physenv null))
+ ;; The depth of the deepest loop that this TN is used in.
+ (loop-depth 0 :type fixnum))
(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
;;; The GLOBAL-CONFLICTS structure represents the conflicts for global
;;; TNs. Each global TN has a list of these structures, one for each
-;;; block that it is live in. In addition to repsenting the result of
+;;; block that it is live in. In addition to representing the result of
;;; lifetime analysis, the global conflicts structure is used during
;;; 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))
- (:copier nil))
+ (: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
;; 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.
+ ;; 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.
+ ;; 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.
+ ;; 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.
+ ;; 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
;; 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)
+ :element-type 'bit
+ :initial-element 0)
+ :type local-tn-bit-vector)
;; the TN we are recording conflicts for.
(tn (missing-arg) :type tn)
;; thread through all the GLOBAL-CONFLICTSs for TN
projects / sbcl.git / blobdiff