aa2d6ef81d
EXTRACT_SUBREG coalescing support. The coalescer now treats EXTRACT_SUBREG like
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(almost) a register copy. However, it always coalesced to the register of the
RHS (the super-register). All uses of the result of a EXTRACT_SUBREG are sub-
register uses which adds subtle complications to load folding, spiller rewrite,
etc.
llvm-svn: 42899
2007-10-12 08:50:34 +00:00
a9830a04eb
Bad choice of variable name.
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llvm-svn: 42821
2007-10-10 00:11:40 +00:00
ad55a6079a
Fix an extremely stupid bug that prevented first round of coalescing (physical registers only) from happening.
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llvm-svn: 42820
2007-10-09 23:36:27 +00:00
9da02f5ee2
Remove isReg, isImm, and isMBB, and change all their users to use
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isRegister, isImmediate, and isMachineBasicBlock, which are equivalent,
and more popular.
llvm-svn: 41958
2007-09-14 20:33:02 +00:00
65d2a697dc
Pluggable coalescers inplementation.
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llvm-svn: 41743
2007-09-06 16:18:45 +00:00
db53aef53e
Use pool allocator for all the VNInfo's to improve memory access locality. This reduces coalescing time on siod Mac OS X PPC by 35%. Also remove the back ptr from VNInfo to LiveInterval and other tweaks.
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llvm-svn: 41729
2007-09-05 21:46:51 +00:00
2089a21360
More tweaks to improve compile time.
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llvm-svn: 41669
2007-09-01 02:03:17 +00:00
7bef79a1c3
std::map -> DenseMap for slight compile time benefit.
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llvm-svn: 41650
2007-08-31 21:23:06 +00:00
262596e76a
Use std::map instead of a (potentially very sparse) array to track val# defined by copy from the other live range. Minor compile time win when number of val# is large.
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llvm-svn: 41640
2007-08-31 08:04:17 +00:00
1ad4a6117b
Change LiveRange so it keeps a pointer to the VNInfo rather than an index.
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Changes related modules so VNInfo's are not copied. This decrease
copy coalescing time by 45% and overall compilation time by 10% on siod.
llvm-svn: 41579
2007-08-29 20:45:00 +00:00
a5b10b334f
Recover most of the compile time regression due to recent live interval changes.
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1. Eliminate the costly live interval "swapping".
2. Change ValueNumberInfo container from SmallVector to std::vector. The former
performs slowly when the vector size is very large.
llvm-svn: 41536
2007-08-28 08:28:51 +00:00
70c2de7bf1
Fix some kill info update bugs; add hidden option -disable-rematerialization to turn off remat for debugging.
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llvm-svn: 41118
2007-08-16 07:24:22 +00:00
94168a4ed0
Fix for PR1596: AdjustCopiesBackFrom() should conservatively check if any of its sub-registers may overlap with the interval of the copy that's being coalesced.
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llvm-svn: 41084
2007-08-14 23:19:28 +00:00
74c69f7588
Kill info update bugs.
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llvm-svn: 41064
2007-08-14 01:56:58 +00:00
33820da1da
Re-implement trivial rematerialization. This allows def MIs whose live intervals that are coalesced to be rematerialized.
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llvm-svn: 41060
2007-08-13 23:45:17 +00:00
af21e9550e
No need to remove dead range from soon-to-be-dead live interval. Its val# may be out of whack.
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llvm-svn: 41024
2007-08-12 01:26:19 +00:00
05cc486c7b
Code to maintain kill information during register coalescing.
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llvm-svn: 41016
2007-08-11 00:59:19 +00:00
2b9fe84b07
unbreak the build
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llvm-svn: 40976
2007-08-09 23:55:17 +00:00
1115a2b412
Bug fix. ~1U marks the val# dead.
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llvm-svn: 40975
2007-08-09 23:14:39 +00:00
a8c2f38617
- Each val# can have multiple kills.
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- Fix some minor bugs related to special markers on val# def. ~0U means
undefined, ~1U means dead val#.
llvm-svn: 40916
2007-08-08 03:00:28 +00:00
0d0fee269a
- LiveInterval value#'s now have 3 components: def instruction #,
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kill instruction #, and source register number (iff the value# is defined by a
copy).
- Now def instruction # is set for every value#, not just for copy defined ones.
- Update some outdated code related inactive live ranges.
- Kill info not yet set. That's next patch.
llvm-svn: 40913
2007-08-07 23:49:57 +00:00
6299a45277
shorten this name
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llvm-svn: 40843
2007-08-05 18:45:33 +00:00
e02b2d7e69
simpleregistercoalescing -> regcoalescing. It's too long for me to handle.
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llvm-svn: 40654
2007-07-31 22:37:44 +00:00
147d9fa57d
Don't assume that only Uses can be kills. Defs are marked as kills initially
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when there are no uses. This fixes a dangling-pointer bug, where pointers to
deleted instructions were not removed from kills lists. More info here:
http://lists.cs.uiuc.edu/pipermail/llvmdev/2007-July/009749.html
llvm-svn: 40131
2007-07-20 23:17:34 +00:00
a8d152a22a
Add comment.
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llvm-svn: 40022
2007-07-18 23:34:48 +00:00
ef3d8362a3
fix typos
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llvm-svn: 38453
2007-07-09 12:00:59 +00:00
02f6e9b621
Factor live variable analysis so it does not do register coalescing
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simultaneously. Move that pass to SimpleRegisterCoalescing.
This makes it easier to implement alternative register allocation and
coalescing strategies while maintaining reuse of the existing live
interval analysis.
llvm-svn: 37520
2007-06-08 17:18:56 +00:00
Evan Cheng