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218 Commits

Author SHA1 Message Date
Bill Wendling
1c40c8c242 Oy! When reverting r68073, I added in experimental code. Sorry... 
llvm-svn: 68099
 2009-03-31 08:41:31 +00:00
Bill Wendling
4706abded2 Revert r68073. It's causing a failure in the Apple-style builds. 
llvm-svn: 68092
 2009-03-31 08:26:26 +00:00
Daniel Dunbar
2cdac55ad0 Add newlines at end of file (this can annoy gcov) 
llvm-svn: 67000
 2009-03-14 01:53:05 +00:00
Owen Anderson
dd7e4f8c43 Convert VirtRegMap to a MachineFunctionPass. 
llvm-svn: 66870
 2009-03-13 05:55:11 +00:00
Owen Anderson
fb5980b6ab Reorganization: Move the Spiller out of VirtRegMap.cpp into its own files. No (intended) functionality change. 
llvm-svn: 66720
 2009-03-11 22:31:21 +00:00
Evan Cheng
8b47b553f9 Yet another case where the spiller marked two uses of the same register on the same instruction as kill. This fixes PR3706. 
llvm-svn: 66428
 2009-03-09 19:00:05 +00:00
Evan Cheng
483ece4d2e If a MI uses the same register more than once, only mark one of them as 'kill'. 
llvm-svn: 66363
 2009-03-08 03:58:35 +00:00
Evan Cheng
9c3ce7905e Last commit accidentially deleted this code. 
llvm-svn: 65679
 2009-02-28 06:02:14 +00:00
Evan Cheng
86fc9440db The last commit was overly conservative. It's ok to reuse value that's already marked livein. 
llvm-svn: 65498
 2009-02-26 03:02:21 +00:00
Evan Cheng
435dbd4665 If an available register falls through to a succ block, unset the last kill. Sorry, it's impossible to reduce a sensible test case. It basically requires the moon and stars to align in order to cause a failure. 
llvm-svn: 65497
 2009-02-26 02:30:42 +00:00
Evan Cheng
2e0cf05ad2 A couple of places where reused use operands should be marked kill. This is exposed by recent availability fallthrough changes. 
llvm-svn: 64745
 2009-02-17 06:41:03 +00:00
Bill Wendling
40e4b271af Revert this. It was breaking stuff. 
llvm-svn: 64428
 2009-02-13 02:16:35 +00:00
Bill Wendling
83b6edd760 Turn off the old way of handling debug information in the code generator. Use 
the new way, where all of the information is passed on SDNodes and machine
instructions.

llvm-svn: 64427
 2009-02-13 02:01:04 +00:00
Dan Gohman
3c296f6bd0 Adjust the sizes for a few SmallVectors to reflect their usage. 
llvm-svn: 64381
 2009-02-12 17:29:01 +00:00
Evan Cheng
91c27ec711 It's (currently) not safe to keep certain physical registers live across basic blocks, e.g. x86 fp stack registers. 
llvm-svn: 64374
 2009-02-12 10:32:17 +00:00
Evan Cheng
04558ecc90 If availability info is kept when fallthrough into a bb, add the available registers to live-in set. 
llvm-svn: 64372
 2009-02-12 09:43:23 +00:00
Evan Cheng
a34255f910 Remove a bogus assertion. It's possible a live-in available value is used by a previous instruction. 
llvm-svn: 64339
 2009-02-11 23:41:57 +00:00
Evan Cheng
cfa084930b Implement PR3495: local spiller optimization. The local spiller can now keep availability information over BB boundaries. It visits BB's in depth first order. After visiting a BB if it find a successor which has a single predecessor it visits the successor next without clearing the availability information. This allows the successor to omit reloads or change them into copies. 
llvm-svn: 64298
 2009-02-11 08:24:21 +00:00
Bill Wendling
e496361cf5 Explicitly pass in debug location information to BuildMI. 
llvm-svn: 63599
 2009-02-03 02:29:34 +00:00
Evan Cheng
b3c82db63d Change TargetInstrInfo::isMoveInstr to return source and destination sub-register indices as well. 
llvm-svn: 62600
 2009-01-20 19:12:24 +00:00
Evan Cheng
39d7e00ff9 Fix PR3124: overly strict assert. 
llvm-svn: 60392
 2008-12-02 02:15:36 +00:00
Evan Cheng
7792ca759d Fix PR2898. Spiller delete a store for reuse before it knows for sure the reuse happened. 
Patch by Lang Hames!

llvm-svn: 57720
 2008-10-17 20:56:41 +00:00
Evan Cheng
5fe2abfee8 Fix a very subtle spiller bug: UpdateKills should not forget to track defs of aliases. 
llvm-svn: 57673
 2008-10-17 06:16:07 +00:00
Dan Gohman
9543edc4ef Fix command-line option printing to print two spaces where needed, 
instead of requiring all "short description" strings to begin with
two spaces. This makes these strings less mysterious, and it fixes
some cases where short description strings mistakenly did not
begin with two spaces.

llvm-svn: 57521
 2008-10-14 20:25:08 +00:00
Dan Gohman
8b33abdd5b Don't dereference the end() iterator. Thanks to 
ENABLE_EXPENSIVE_CHECKS for finding this.

llvm-svn: 57181
 2008-10-06 18:00:07 +00:00
Dan Gohman
30c5ce1b7d Switch the MachineOperand accessors back to the short names like 
isReg, etc., from isRegister, etc.

llvm-svn: 57006
 2008-10-03 15:45:36 +00:00
Evan Cheng
b879f93ba5 Propagate subreg index when promoting a load to a copy. 
llvm-svn: 56085
 2008-09-11 01:02:12 +00:00
Evan Cheng
474ba35954 Fix PR2664 - spiller GetRegForReload wasn't respecting sub-register indices on machine operands. 
llvm-svn: 56065
 2008-09-10 20:08:45 +00:00
Evan Cheng
dcce925eb1 Fix an overly strict assertion. Source register of a copy may not be killed, it may be killed by an implicit super-register use. 
llvm-svn: 55762
 2008-09-04 05:43:55 +00:00
Owen Anderson
c68a43890f Make SimpleSpiller respect subregister indices. 
llvm-svn: 54968
 2008-08-19 01:05:33 +00:00
Evan Cheng
a07795a0c3 Fix PR2596: out of bound reference. 
llvm-svn: 54375
 2008-08-05 21:51:46 +00:00
Dan Gohman
e119f3db46 Fix a LocalSpiller leak. This fixes tramp3d-v4. 
llvm-svn: 53766
 2008-07-18 18:28:56 +00:00
Dan Gohman
cd25487258 Pool-allocation for MachineInstrs, MachineBasicBlocks, and 
MachineMemOperands. The pools are owned by MachineFunctions.

This drastically reduces the number of calls to malloc/free made
during the "Emit" phase of scheduling, as well as later phases
in CodeGen. Combined with other changes, this speeds up the
"instruction selection" phase of CodeGen by 10% in some cases.

llvm-svn: 53212
 2008-07-07 23:14:23 +00:00
Evan Cheng
cba32609d2 Cosmetic. 
llvm-svn: 52450
 2008-06-18 07:47:28 +00:00
Evan Cheng
93d91a771c Fix read after free found by valgrind. 
llvm-svn: 52309
 2008-06-16 07:34:17 +00:00
Evan Cheng
2e99c9cbf8 Teach the spiller to commute instructions in order to fold a reload. This hits 410 times on 444.namd and 122 times on 252.eon. 
llvm-svn: 52266
 2008-06-13 23:58:02 +00:00
Evan Cheng
9153a5316c Move #include to right place. 
llvm-svn: 51932
 2008-06-04 09:16:33 +00:00
Bill Wendling
5fbba337e1 Remove warnings about comparison between signed and unsigned expressions. 
llvm-svn: 51465
 2008-05-23 01:29:08 +00:00
David Greene
47ea993e83 Don't attempt to update SpillSlotToUsesMap for stack slots that aren't 
generated by the spiller.

llvm-svn: 51439
 2008-05-22 21:12:21 +00:00
Evan Cheng
55e3957c96 More local spiller complexity! 
If local spiller optimization turns some instruction into an identity copy, it will be removed. If the output register happens to be dead (and source is obviously killed), transfer the kill / dead information to last use / def in the same MBB.

llvm-svn: 51306
 2008-05-20 08:13:21 +00:00
Dan Gohman
bab18cae46 Clean up the use of static and anonymous namespaces. This turned up 
several things that were neither in an anonymous namespace nor static
but not intended to be global.

llvm-svn: 51017
 2008-05-13 00:00:25 +00:00
Evan Cheng
c86c035346 Yet another nasty spiller bug. 
%ecx = op
store %cl<kill>, (addr)
(addr) = op %al

It's not safe to unfold the last operand and eliminate store even though %cl is marked kill. It's a sub-register use which means one of its super-register(s) may be used below.

llvm-svn: 50794
 2008-05-07 00:49:28 +00:00
Evan Cheng
b389b78462 Use of implicit_def is not part of live interval. Create empty intervals for the uses when the live interval is being spilled. 
llvm-svn: 49542
 2008-04-11 17:53:36 +00:00
Evan Cheng
38a755499d Move reMaterialize() from TargetRegisterInfo to TargetInstrInfo. 
llvm-svn: 48995
 2008-03-31 20:40:39 +00:00
Evan Cheng
8d222d6221 Avoid commuting a def MI in order to coalesce a copy instruction away if any use of the same val# is a copy instruction that has already been coalesced. 
llvm-svn: 48833
 2008-03-26 19:03:01 +00:00
Evan Cheng
32a6116ffd A couple of kill marker maintainence bug. 
llvm-svn: 48653
 2008-03-21 19:09:30 +00:00
Evan Cheng
3612a7ed30 Fix PR2138. Apparently any modification to a std::multimap (including remove entries for a different key) can invalidate multimap iterators. 
llvm-svn: 48371
 2008-03-14 20:44:01 +00:00
Dan Gohman
e40582180e Change VirtRegMap's dump to dump to cerr, not DOUT, so that it 
can be called from within a debuger without having -debug specified
on the command-line.

llvm-svn: 48298
 2008-03-12 20:52:10 +00:00
Evan Cheng
1812351f99 Set NextMII after issuing a physical register spill. 
llvm-svn: 48263
 2008-03-12 00:14:07 +00:00
Evan Cheng
909992f970 Minor debug output bug. 
llvm-svn: 48261
 2008-03-12 00:02:46 +00:00