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[smlnj] Log of /MLRISC/releases/release-110.65/backpatch
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Log of /MLRISC/releases/release-110.65/backpatch

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Revision 2705 - Directory Listing
Modified Fri Jun 8 04:28:20 2007 UTC (12 years, 3 months ago) by blume
Release 110.65

Revision 2126 - Directory Listing
Modified Thu Nov 2 16:11:29 2006 UTC (12 years, 10 months ago) by blume
Original Path: MLRISC/trunk/backpatch
moved MLRISC to toplevel

Revision 1270 - Directory Listing
Modified Thu Oct 10 14:48:48 2002 UTC (16 years, 11 months ago) by george
Original Path: sml/trunk/src/MLRISC/backpatch
From Allen: Added a flag to dump the cfg after back patching
            and delay slot filling.

Revision 1133 - Directory Listing
Modified Tue Mar 12 03:56:23 2002 UTC (17 years, 6 months ago) by george
Original Path: sml/trunk/src/MLRISC/backpatch
Tested the jump chain elimination on all architectures (except the
hppa).  This is on by default right now and is profitable for the
alpha and x86, however, it may not be profitable for the sparc and ppc
when compiling the compiler.

The gc test will typically jump to a label at the end of the cluster,
where there is another jump to an external cluster containing the actual
code to invoke gc. This is to allow factoring of common gc invocation
sequences. That is to say, we generate:

	f:
	   testgc
	   ja	L1	% jump if above to L1

	L1:
	   jmp L2


After jump chain elimination the 'ja L1' instructions is converted to
'ja L2'. On the sparc and ppc, many of the 'ja L2' instructions may end
up being implemented in their long form (if L2 is far away) using:

	jbe	L3	% jump if below or equal to L3
        jmp 	L2
     L3:
	...


For large compilation units L2  may be far away.

Revision 1126 - Directory Listing
Modified Thu Mar 7 21:16:28 2002 UTC (17 years, 6 months ago) by blume
Original Path: sml/trunk/src/MLRISC/backpatch
implemented generic Controls module and used it for
all compiler flags/tuneable knobs/...;
more command-line options accepted (for setting the above controls);
some minor bug fixes

Revision 1124 - Directory Listing
Modified Thu Mar 7 19:49:22 2002 UTC (17 years, 6 months ago) by george
Original Path: sml/trunk/src/MLRISC/backpatch
Tested the weighted block placement optimization on all architectures
(except the hppa) using AMPL to generate the block and edge frequencies.
Changes were required in the machine properties to correctly
categorize trap instructions. There is an MLRISC flag
"weighted-block-placement" that can be used to enable weighted block
placement, but this will be ineffective without block/edge
frequencies (coming soon).

Revision 1009 - Directory Listing
Modified Wed Jan 9 19:44:22 2002 UTC (17 years, 8 months ago) by george
Original Path: sml/trunk/src/MLRISC/backpatch
	Removed the native COPY and FCOPY instructions
	from all the architectures and replaced it with the
	explicit COPY instruction from the previous commit.

	It is now possible to simplify many of the optimizations
	modules that manipulate copies. This has not been
	done in this change.

Revision 1003 - Directory Listing
Modified Fri Dec 7 02:45:32 2001 UTC (17 years, 9 months ago) by george
Original Path: sml/trunk/src/MLRISC/backpatch
Changed the representation of instructions from being fully abstract
to being partially concrete. That is to say:

  from
	type instruction

  to
	type instr				(* machine instruction *)

	datatype instruction =
	    LIVE of {regs: C.cellset, spilled: C.cellset}
          | KILL of {regs: C.cellset, spilled: C.cellset}
          | COPYXXX of {k: CB.cellkind, dst: CB.cell list, src: CB.cell list}
          | ANNOTATION of {i: instruction, a: Annotations.annotation}
          | INSTR of instr

This makes the handling of certain special instructions that appear on
all architectures easier and uniform.

LIVE and KILL say that a list of registers are live or killed at the
program point where they appear. No spill code is generated when an
element of the 'regs' field is spilled, but the register is moved to
the 'spilled' (which is present, more for debugging than anything else).

LIVE replaces the (now deprecated) DEFFREG instruction on the alpha.
We used to generate:

	DEFFREG f1
	f1 := f2 + f3
        trapb

but now generate:

	f1 := f2 + f3
	trapb
	LIVE {regs=[f1,f2,f3], spilled=[]}

Furthermore, the DEFFREG (hack) required that all floating point instruction
use all registers mentioned in the instruction. Therefore f1 := f2 + f3,
defines f1 and uses [f1,f2,f3]! This hack is no longer required resulting
in a cleaner alpha implementation. (Hopefully, intel will not get rid of
this architecture).

COPYXXX is intended to replace the parallel COPY and FCOPY  available on
all the architectures. This will result in further simplification of the
register allocator that must be aware of them for coalescing purposes, and
will also simplify certain aspects of the machine description that provides
callbacks related to parallel copies.

ANNOTATION should be obvious, and now INSTR represents the honest to God
machine instruction set!

The <arch>/instructions/<arch>Instr.sml files define certain utility
functions for making porting easier -- essentially converting upper case
to lower case. All machine instructions (of type instr) are in upper case,
and the lower case form generates an MLRISC instruction. For example on
the alpha we have:

  datatype instr =
     LDA of {r:cell, b:cell, d:operand}
   | ...

  val lda : {r:cell, b:cell, d:operand} -> instruction
    ...

where lda is just (INSTR o LDA), etc.

Revision 1000 - Directory Listing
Modified Wed Nov 28 14:50:42 2001 UTC (17 years, 9 months ago) by george
Original Path: sml/trunk/src/MLRISC/backpatch
Simplified the algorithm used to reach a fixpoint.
This should have been part of 110.37 but I couldn't
get it to work until Allen pointed out the fix.

Revision 991 - Directory Listing
Modified Thu Nov 22 14:25:12 2001 UTC (17 years, 10 months ago) by george
Original Path: sml/trunk/src/MLRISC/backpatch
  Fixed a bug on non-x86 architectures related to backpatching
  and the new pseudo-ops.

Revision 986 - Directory Listing
Modified Wed Nov 21 21:03:17 2001 UTC (17 years, 10 months ago) by blume
Original Path: sml/trunk/src/MLRISC/backpatch
Release 110.37 -- see HISTORY

Revision 984 - Directory Listing
Modified Wed Nov 21 19:00:08 2001 UTC (17 years, 10 months ago) by george
Original Path: sml/trunk/src/MLRISC/backpatch
  Implemented a complete redesign of MLRISC pseudo-ops. Now there
  ought to never be any question of incompatabilities with
  pseudo-op syntax expected by host assemblers.

  For now, only modules supporting GAS syntax are implemented
  but more should follow, such as MASM, and vendor assembler
  syntax, e.g. IBM as, Sun as, etc.

Revision 976 - Directory Listing
Modified Wed Nov 14 14:54:03 2001 UTC (17 years, 10 months ago) by george
Original Path: sml/trunk/src/MLRISC/backpatch
  Fix for a backpatching bug reported by Allen.

  Because the boundary between short and long span-dependent
  instructions is +/- 128, there are an astounding number of
  span-dependent instructions whose size is over estimated.

  Allen came up with the idea of letting the size of span
  dependent instructions be non-monotonic, for a maxIter
  number of times, after which the size must be monotonically
  increasing.

  This table shows the number of span-dependent instructions
  whose size was over-estimated as a function of maxIter, for the
  file Parse/parse/ml.grm.sml:

     maxIter		# of instructions:
 	10			687
 	20			438
 	30			198
        40			  0

  In compiling the compiler, there is no significant difference in
  compilation speed between maxIter=10 and maxIter=40. Actually,
  my measurements showed that maxIter=40 was a tad faster than
  maxIter=10! Also 96% of the  files in the compiler reach a fix
  point within 13 iterations, so fixing maxIter at 40, while high,
  is okay.

Revision 933 - Directory Listing
Modified Wed Sep 19 19:31:19 2001 UTC (18 years ago) by george
Original Path: sml/trunk/src/MLRISC/backpatch
  cleanup

Revision 909 - Directory Listing
Modified Fri Aug 24 17:48:53 2001 UTC (18 years, 1 month ago) by george
Original Path: sml/trunk/src/MLRISC/backpatch
removed clusters from MLRISC

Revision 744 - Directory Listing
Modified Fri Dec 8 04:11:42 2000 UTC (18 years, 9 months ago) by leunga
Original Path: sml/trunk/src/MLRISC/backpatch

   A CVS update record!

   Changed type cell from int to datatype, and numerous other changes.
   Affect every client of MLRISC.  Lal says this can be bootstrapped on all
   machines.  See smlnj/HISTORY for details.

   Tag:  leunga-20001207-cell-monster-hack

Revision 651 - Directory Listing
Modified Thu Jun 1 18:34:03 2000 UTC (19 years, 3 months ago) by monnier
Original Path: sml/trunk/src/MLRISC/backpatch
bring revisions from the vendor branch to the trunk

Revision 545 - Directory Listing
Modified Thu Feb 24 13:56:44 2000 UTC (19 years, 7 months ago) by george
Original Path: sml/trunk/src/MLRISC/backpatch
  Changes to MLTREE

Revision 499 - Directory Listing
Modified Tue Dec 7 15:44:50 1999 UTC (19 years, 9 months ago) by monnier
Original Path: sml/trunk/src/MLRISC/backpatch
This commit was generated by cvs2svn to compensate for changes in r498,
which included commits to RCS files with non-trunk default branches.

Revision 430 - Directory Listing
Modified Wed Sep 8 09:47:00 1999 UTC (20 years ago) by monnier
Original Path: sml/trunk/src/MLRISC/backpatch
This commit was generated by cvs2svn to compensate for changes in r429,
which included commits to RCS files with non-trunk default branches.

Revision 427 - Directory Listing
Modified Wed Sep 8 09:40:08 1999 UTC (20 years ago) by monnier
Original Path: sml/trunk/src/MLRISC/backpatch
Initial revision

Revision 412 - Directory Listing
Modified Fri Sep 3 00:25:03 1999 UTC (20 years ago) by monnier
Original Path: sml/trunk/src/MLRISC/backpatch
This commit was generated by cvs2svn to compensate for changes in r411,
which included commits to RCS files with non-trunk default branches.

Revision 248 - Directory Listing
Modified Sat Apr 17 18:47:13 1999 UTC (20 years, 5 months ago) by monnier
Original Path: sml/trunk/src/MLRISC/backpatch
This commit was generated by cvs2svn to compensate for changes in r247,
which included commits to RCS files with non-trunk default branches.

Revision 246 - Directory Listing
Modified Sat Apr 17 18:47:12 1999 UTC (20 years, 5 months ago) by monnier
Original Path: sml/trunk/src/MLRISC/backpatch
This commit was generated by cvs2svn to compensate for changes in r245,
which included commits to RCS files with non-trunk default branches.

Revision 244 - Directory Listing
Modified Sat Apr 17 18:41:51 1999 UTC (20 years, 5 months ago) by monnier
Original Path: sml/trunk/src/MLRISC/backpatch
This commit was generated by cvs2svn to compensate for changes in r243,
which included commits to RCS files with non-trunk default branches.

Revision 241 - Directory Listing
Modified Sat Apr 17 18:35:00 1999 UTC (20 years, 5 months ago) by monnier
Original Path: sml/trunk/src/MLRISC/backpatch
Initial revision

Revision 228 - Directory Listing
Modified Sat Apr 17 17:15:03 1999 UTC (20 years, 5 months ago) by monnier
Original Path: sml/trunk/src/MLRISC/backpatch
This commit was generated by cvs2svn to compensate for changes in r227,
which included commits to RCS files with non-trunk default branches.

Revision 221 - Directory Listing
Added Sat Apr 17 16:19:57 1999 UTC (20 years, 5 months ago) by monnier
Original Path: sml/trunk/src/MLRISC/backpatch
Initial revision

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