96fce00dc0
Get rid of sentinel insertion in interval reconstruction. It just masked the
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problem, rather than fixing it. The problem has now been fixed the right way.
llvm-svn: 61723
2009-01-05 18:32:26 +00:00
8b86b9ca47
Get live interval reconstruction several steps closer to working.
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llvm-svn: 61514
2008-12-31 02:00:25 +00:00
43b18241ff
Add braces, as suggested by a gcc warning.
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llvm-svn: 61465
2008-12-29 08:05:02 +00:00
b5232286a7
Fix up kill/dead marking in the new live interval reconstruction code.
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llvm-svn: 61460
2008-12-28 23:35:13 +00:00
37751bb9d9
Add prototype code for recomputing a live interval's ranges and valnos through recursive phi construction.
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llvm-svn: 61458
2008-12-28 21:48:48 +00:00
ad4d2ab15b
Re-apply r61158 in a form that no longer breaks tests.
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llvm-svn: 61182
2008-12-18 01:27:19 +00:00
59727c0496
Revert r61158 for now, as it caused some test failures.
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llvm-svn: 61159
2008-12-17 22:17:27 +00:00
9389176009
Fix miscompilations caused by renumbering, and enable it as part of prealloc splitting.
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llvm-svn: 61158
2008-12-17 22:06:59 +00:00
5121ec3821
Add code to renumber split intervals into new vregs. This is disabled for now until I finish working out some iterator invalidation issues.
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llvm-svn: 61104
2008-12-16 21:35:08 +00:00
12679470bf
Switch to top-down mode and fix a crasher this exposed caused by an error in the
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live interval updating.
llvm-svn: 60652
2008-12-07 05:33:18 +00:00
0bcbe8f6a8
Factor out some common code.
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llvm-svn: 60553
2008-12-04 21:20:30 +00:00
ecd5b5f2b2
Add support for folding spills into preceding defs when doing pre-alloc splitting.
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llvm-svn: 60433
2008-12-02 18:53:47 +00:00
1af37c2fca
Add support for rematerialization in pre-alloc-splitting.
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llvm-svn: 59587
2008-11-19 04:28:29 +00:00
896512af94
Fix a bug introduced by my previous patch. With this change, SPEC is now clean with prealloc splitting enabled.
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llvm-svn: 59544
2008-11-18 20:53:59 +00:00
d36b4c1bf8
Don't allow the restore point to be placed after terminators. With this change,
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MultiSource/Applications is clean with the prealloc splitter. Some failures
remain in SPEC.
llvm-svn: 59267
2008-11-13 21:53:14 +00:00
fd395eb801
Don't walk into predecessors in which the vreg is not live when doing shrinkwrapping.
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This lets several failing tests get farther along, but doesn't completely fix any of them.
llvm-svn: 59086
2008-11-11 22:11:27 +00:00
26c10f1b4a
Use the new predicate to control when we do prealloc splitting. Fix a small bug.
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llvm-svn: 58738
2008-11-05 00:32:13 +00:00
a926ed4b50
First pass at checking for the creation of a new join point when doing pre-alloc splitting. This is not turned on yet.
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llvm-svn: 58726
2008-11-04 22:22:41 +00:00
b067843863
Revert my last patch until I consult with Evan about it.
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llvm-svn: 58591
2008-11-03 02:33:28 +00:00
2bb2aaa775
Don't do pre-splitting if doing so would create a value join that did not
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exist before. Updating the live intervals in that care is tricky in the general
case.
Evan, if you see a tighter guard condition for this, let me know.
llvm-svn: 58560
2008-11-02 08:08:18 +00:00
d1f8c9f4a2
Add a fixme.
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llvm-svn: 58514
2008-10-31 16:41:59 +00:00
ce3ccc1ea0
- More pre-split fixes: spill slot live interval computation bug; restore point bug.
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- If a def is spilt, remember its spill index to allow its reuse.
llvm-svn: 58375
2008-10-29 08:39:34 +00:00
938e201528
- Rewrite code that update register live interval that's split.
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- Create and update spill slot live intervals.
- Lots of bug fixes.
llvm-svn: 58367
2008-10-29 05:06:14 +00:00
5e88d90379
If def is in the same mbb as the barrier, spilt the value after the last use before the barrier.
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llvm-svn: 58314
2008-10-28 05:28:21 +00:00
9f854697e4
Add command line option to limit the number splits to help debugging.
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llvm-svn: 58312
2008-10-28 01:48:24 +00:00
fab31680e1
Avoid putting a split past the end of the live range; always shrink wrap live interval in the barrier mbb.
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llvm-svn: 58309
2008-10-28 00:47:49 +00:00
e67ad47a00
Silence a bogus compile time warning.
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llvm-svn: 58297
2008-10-27 23:29:28 +00:00
f46642ada6
Remove val# defined by a remat'ed def that is now dead.
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llvm-svn: 58294
2008-10-27 23:21:01 +00:00
f713722975
For now, don't split live intervals around x87 stack register barriers. FpGET_ST0_80 must be right after a call instruction (and ADJCALLSTACKUP) so we need to find a way to prevent reload of x87 registers between them.
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llvm-svn: 58230
2008-10-27 07:14:50 +00:00
ed033ede22
Do not shrink wrap live interval in a mbb if it's livein any of its successor blocks. The mbb can be revisited again after all of the successors are processed.
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llvm-svn: 58184
2008-10-26 07:49:03 +00:00
f48367b8e9
Handle cases where there aren't uses in the barrier mbb.
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llvm-svn: 58174
2008-10-25 23:49:39 +00:00
85d71d4588
If val# def is ~0U, meaning it's defined by a PHI, and it's previously split, spill before the barrier because it's impossible to determine if all the defs are spilled in the same spill slot.
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llvm-svn: 58129
2008-10-25 00:52:41 +00:00
cd160f9859
Fix a pasto.
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llvm-svn: 58102
2008-10-24 18:46:44 +00:00
f8b09d424d
Fix a end() dereference; remove an abort() that wasn't meant to be left in.
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llvm-svn: 58072
2008-10-24 05:53:44 +00:00
4bac4d0a16
Avoid splitting an interval multiple times; avoid splitting re-materializable val# (for now).
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llvm-svn: 58068
2008-10-24 02:05:00 +00:00
d0d0317b9a
Committing a good chunk of the pre-register allocation live interval splitting pass. It's handling simple cases and appear to do good things. Next: avoid splitting an interval multiple times; renumber registers when possible; record stack slot live intervals for coloring; rematerialize defs when possible.
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llvm-svn: 58044
2008-10-23 20:43:13 +00:00
7e721ecd21
Add skeleton for the pre-register allocation live interval splitting pass.
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llvm-svn: 57847
2008-10-20 21:44:59 +00:00
Owen Anderson