Commit b6317868 authored by Raymond Toy's avatar Raymond Toy
Browse files

Increase max-alignment from 3 to 4.

Use boot-2017-01-1.lisp to bootstrap this change  You'll still have to
use the CLOBBER-IT restart when loading new-assem in the first
build. Afterwards, it should be fine.
parent f8d120c1
......@@ -39,7 +39,7 @@ ENABLE2="yes"
;; Boot file to increase the max alignment value from 3 to 4.
;; This takes care of everything for the bootstrap, but when new-assem
;; is loaded. you'll get a warning. Select the CLOBBER-IT restart to
;; continue.
(in-package :new-assem)
((error (lambda (c)
(declare (ignore c))
(invoke-restart 'continue))))
(defconstant max-alignment 4))
(deftype alignment ()
`(integer 0 ,max-alignment))
(handler-bind ((error (lambda (c)
(declare (ignore c))
(invoke-restart 'kernel::clobber-it))))
(defstruct (segment
(:print-function %print-segment)
(:constructor make-segment (&key name run-scheduler inst-hook)))
;; The name of this segment. Only using in trace files.
(name "Unnamed" :type simple-base-string)
;; Whether or not run the scheduler. Note: if the instruction defintions
;; were not compiled with the scheduler turned on, this has no effect.
(run-scheduler nil)
;; If a function, then it is funcalled for each inst emitted with the
;; segment, the VOP, the name of the inst (as a string), and the inst
;; arguments.
(inst-hook nil :type (or function null))
;; Where to deposit the next byte.
(fill-pointer (system:int-sap 0) :type system:system-area-pointer)
;; Where the current output block ends. If fill-pointer is ever sap= to
;; this, don't deposit a byte. Move the fill pointer into a new block.
(block-end (system:int-sap 0) :type system:system-area-pointer)
;; What position does this correspond to. Initially, positions and indexes
;; are the same, but after we start collapsing choosers, positions can change
;; while indexes stay the same.
(current-posn 0 :type posn)
;; Were in the output blocks are we currently outputing.
(current-index 0 :type index)
;; A vector of the output blocks.
(output-blocks (make-array 4 :initial-element nil) :type simple-vector)
;; A list of all the annotations that have been output to this segment.
(annotations nil :type list)
;; A pointer to the last cons cell in the annotations list. This is
;; so we can quickly add things to the end of the annotations list.
(last-annotation nil :type list)
;; The number of bits of alignment at the last time we synchronized.
(alignment max-alignment :type alignment)
;; The position the last time we synchronized.
(sync-posn 0 :type posn)
;; The posn and index everything ends at. This is not maintained while the
;; data is being generated, but is filled in after. Basically, we copy
;; current-posn and current-index so that we can trash them while processing
;; choosers and back-patches.
(final-posn 0 :type posn)
(final-index 0 :type index)
;; *** State used by the scheduler during instruction queueing.
;; List of postit's. These are accumulated between instructions.
(postits nil :type list)
;; ``Number'' for last instruction queued. Used only to supply insts
;; with unique sset-element-number's.
(inst-number 0 :type index)
;; Simple-Vectors mapping locations to the instruction that reads them and
;; instructions that write them.
(readers (make-array (assem-params-max-locations
(c:backend-assembler-params c:*backend*))
:initial-element nil)
:type simple-vector)
(writers (make-array (assem-params-max-locations
(c:backend-assembler-params c:*backend*))
:initial-element nil)
:type simple-vector)
;; The number of additional cycles before the next control transfer, or NIL
;; if a control transfer hasn't been queued. When a delayed branch is
;; queued, this slot is set to the delay count.
(branch-countdown nil :type (or null (and fixnum unsigned-byte)))
;; *** These two slots are used both by the queuing noise and the
;; scheduling noise.
;; All the instructions that are pending and don't have any unresolved
;; dependents. We don't list branches here even if they would otherwise
;; qualify. They are listed above.
(emittable-insts-sset (make-sset) :type sset)
;; List of queued branches. We handle these specially, because they have to
;; be emitted at a specific place (e.g. one slot before the end of the
;; block).
(queued-branches nil :type list)
;; *** State used by the scheduler duing instruction scheduling.
;; The instructions who would have had a read dependent removed if it were
;; not for a delay slot. This is a list of lists. Each element in the
;; top level list corresponds to yet another cycle of delay. Each element
;; in the second level lists is a dotted pair, holding the dependency
;; instruction and the dependent to remove.
(delayed nil :type list)
;; The emittable insts again, except this time as a list sorted by depth.
(emittable-insts-queue nil :type list)
;; Whether or not to collect dynamic statistics. This is just the same as
;; *collect-dynamic-statistics* but is faster to reference.
(collect-dynamic-statistics nil))))
......@@ -80,7 +80,7 @@
;;; format. If the loader only loads objects 8-byte aligned, we can't do
;;; any better than that ourselves.
(defconstant max-alignment 3)
(defconstant max-alignment 4)
(deftype alignment ()
`(integer 0 ,max-alignment))
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