97cc93841d
Handle cases when joining live intervals of two virtual registers.
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llvm-svn: 34534
2007-02-23 20:40:13 +00:00
cc607daac1
Remove unnecessary isKill properties if a live range has been lengthened due to coalescing.
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llvm-svn: 34503
2007-02-22 23:03:39 +00:00
5b2b7c1024
Allow for live in registers for eh landing pads.
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llvm-svn: 34475
2007-02-21 22:41:17 +00:00
e563c7eb27
Out of bound reference.
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llvm-svn: 34461
2007-02-21 02:27:39 +00:00
f7ed82da10
Re-apply my liveintervalanalysis changes. Now with PR1207 fixes.
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llvm-svn: 34428
2007-02-19 21:49:54 +00:00
da81bf4d3e
For PR1207:
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Revert patches that caused the problem. Evan, please investigate and reapply
when you've discovered the problem.
llvm-svn: 34399
2007-02-19 03:20:00 +00:00
2605082f0e
- Changes how function livein's are handled, they now have a start index of 0.
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- When coalescing a copy MI, if its destination is "dead", propagate the
property to the source MI's destination if there are no intervening uses.
- Detect dead function live-in's and remove them.
llvm-svn: 34383
2007-02-17 11:15:40 +00:00
14edd1989b
Use BitVector instead of vector<bool> which can be extremely slow.
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llvm-svn: 34302
2007-02-15 05:59:24 +00:00
b612316f20
Allow any MachineBasicBlock (not just the entry block) to have live-in physical
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registers. Make sure liveinterval analysis is correctly creating live ranges
for them.
llvm-svn: 34217
2007-02-13 01:30:55 +00:00
aee775a6b7
Eliminate static ctors from Statistics
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llvm-svn: 32698
2006-12-19 22:41:21 +00:00
f3baad3ee1
Changed llvm_ostream et all to OStream. llvm_cerr, llvm_cout, llvm_null, are
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now cerr, cout, and NullStream resp.
llvm-svn: 32298
2006-12-07 01:30:32 +00:00
e312c152d2
MI keeps a ptr of TargetInstrDescriptor, use it.
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llvm-svn: 32296
2006-12-07 01:21:59 +00:00
700b873130
Detemplatize the Statistic class. The only type it is instantiated with
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is 'unsigned'.
llvm-svn: 32279
2006-12-06 17:46:33 +00:00
cc08c83186
Unbreak VC++ build.
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llvm-svn: 32113
2006-12-02 02:22:01 +00:00
67fc141db5
Match TargetInstrInfo changes.
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llvm-svn: 32098
2006-12-01 21:52:58 +00:00
5c3966aa68
Converted to using llvm streams instead of <iostream>s
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llvm-svn: 31992
2006-11-29 00:39:47 +00:00
d811cc6818
Don't recompute getNumOperands for each iteration.
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llvm-svn: 31783
2006-11-16 07:35:18 +00:00
c7969fd1e7
Added a new method "CreateNewLiveInterval" which, given a list of
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LiveRanges, creates a new LiveInterval from them. The LiveRanges should
have existed already in another LiveInterval, but removed.
llvm-svn: 31780
2006-11-16 02:41:50 +00:00
12ea213de9
A register def can be partially dead when the whole register has use(s) but a subreg does not.
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llvm-svn: 31760
2006-11-15 20:54:11 +00:00
8c9c6d71ed
Add implicit def / use operands to MachineInstr.
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llvm-svn: 31633
2006-11-10 08:43:01 +00:00
61feeb90f9
Remove redundant <cmath>.
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llvm-svn: 31561
2006-11-08 19:16:44 +00:00
b18177bfab
Enable improved spilling costs by default. This speeds up viterbi on x86
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by 40%, FreeBench/fourinarow by 20%, and many other programs 10-25%.
On PPC, this speeds up fourinarow by 18%, and probably other things as well.
llvm-svn: 31504
2006-11-07 18:04:58 +00:00
6a9342166b
Use correct value for float HUGH_VAL.
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llvm-svn: 31500
2006-11-07 12:25:45 +00:00
01d039cc44
Add a new llcbeta option. This speeds up viterbi from 12.34 to 8.76s on
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X86. If happy, I'll enable this by default.
llvm-svn: 31493
2006-11-07 07:18:40 +00:00
299022d514
Proper check for two-addressness.
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llvm-svn: 31408
2006-11-03 03:04:46 +00:00
de46e48420
For PR786:
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Turn on -Wunused and -Wno-unused-parameter. Clean up most of the resulting
fall out by removing unused variables. Remaining warnings have to do with
unused functions (I didn't want to delete code without review) and unused
variables in generated code. Maintainers should clean up the remaining
issues when they see them. All changes pass DejaGnu tests and Olden.
llvm-svn: 31380
2006-11-02 20:25:50 +00:00
8fb3d445f5
Keep track of the start of MBB's in a separate map from instructions. This
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is faster and is needed for future improvements.
llvm-svn: 30383
2006-09-15 03:57:23 +00:00
13a5dcddce
Fix a long-standing wart in the code generator: two-address instruction lowering
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actually *removes* one of the operands, instead of just assigning both operands
the same register. This make reasoning about instructions unnecessarily complex,
because you need to know if you are before or after register allocation to match
up operand #'s with the target description file.
Changing this also gets rid of a bunch of hacky code in various places.
This patch also includes changes to fold loads into cmp/test instructions in
the X86 backend, along with a significant simplification to the X86 spill
folding code.
llvm-svn: 30108
2006-09-05 02:12:02 +00:00
1eed04d1fb
Correct fix for a crasher on functions with live in values
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llvm-svn: 30099
2006-09-04 18:27:40 +00:00
bff0b5969f
Hack around a regression I introduced yesterday
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llvm-svn: 30098
2006-09-04 18:20:15 +00:00
8584e940b8
Avoid beating on the mi2i map when we know the answer already.
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llvm-svn: 30066
2006-09-03 08:07:11 +00:00
774785a79d
minor speedup
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llvm-svn: 30065
2006-09-03 07:53:50 +00:00
75742e532a
Iteration is required for some cases, even if they don't occur in crafty.
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Restore it, which re-fixes X86/2006-08-21-ExtraMovInst.ll
llvm-svn: 30050
2006-09-02 05:32:53 +00:00
5a56d30906
When joining two intervals where the RHS is really simple, use a light-weight
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method for joining the live ranges instead of the fully-general one.
llvm-svn: 30049
2006-09-02 05:26:59 +00:00
93c067dc2d
Pull some code out of a hot recursive function because the common case doesn't
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need recursion.
llvm-svn: 30015
2006-09-01 07:00:23 +00:00
3eac2c87aa
Reserve space in the ValueNumberInfo vector. This speeds up live interval
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analysis 16% on crafty.
Wrap long lines.
llvm-svn: 30012
2006-09-01 06:10:18 +00:00
f765351978
Iterative coallescing doesn't buy us anything (we get identical results on
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crafty with and without it). Removing it speeds up live intervals 6%.
llvm-svn: 30010
2006-09-01 04:02:42 +00:00
a700a19d04
Add a special case that speeds up coallescing a bit, but not enough.
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llvm-svn: 29996
2006-08-31 06:48:26 +00:00
78cca7243c
Delete copies as they are coallesced instead of waiting until the end.
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llvm-svn: 29995
2006-08-31 05:58:59 +00:00
aa36808fd3
avoid calling the virtual isMoveInstr method endlessly by caching its results.
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llvm-svn: 29994
2006-08-31 05:54:43 +00:00
cb74860cce
Fix a compiler crash bootstrapping llvm-gcc.
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llvm-svn: 29989
2006-08-30 23:02:29 +00:00
34434e97c9
Teach the coallescer to coallesce live intervals joined by an arbitrary
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number of copies, potentially defining live ranges that appear to have
differing value numbers that become identical when coallsced. Among other
things, this fixes CodeGen/X86/shift-coalesce.ll and PR687.
llvm-svn: 29968
2006-08-29 23:18:15 +00:00
3c9b2420df
Eliminate RegisterAnalysis. RegisterPass now does all that is necessary.
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llvm-svn: 29921
2006-08-27 22:30:17 +00:00
2c3683a901
typo fix
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llvm-svn: 29910
2006-08-27 12:47:48 +00:00
122f2bcdc2
Simplifications to liveinterval analysis, no functionality change.
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llvm-svn: 29896
2006-08-26 01:28:16 +00:00
f4f0b1995c
Completely change the way that joining with physregs is implemented. This
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paves the way for future changes, increases coallescing opportunities (in
theory, not witnessed in practice), and eliminates the really expensive
LiveIntervals::overlapsAliases method.
llvm-svn: 29890
2006-08-25 23:41:24 +00:00
bdf121060c
Take advantage of the recent improvements to the liveintervals set (tracking
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instructions which define each value#) to simplify and improve the coallescer.
In particular, this patch:
1. Implements iterative coallescing.
2. Reverts an unsafe hack from handlePhysRegDef, superceeding it with a
better solution.
3. Implements PR865, "coallescing" away the second copy in code like:
A = B
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B = A
This also includes changes to symbolically print registers in intervals
when possible.
llvm-svn: 29862
2006-08-24 22:43:55 +00:00
2e9f1bc056
Improve the LiveInterval class to keep track of which machine instruction
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defines each value# tracked by the interval. This will be used to improve
coallescing.
llvm-svn: 29830
2006-08-22 18:19:46 +00:00
1d77a0ff88
Print physreg names symbolically in dumps
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llvm-svn: 29805
2006-08-21 23:03:54 +00:00
213159a6ee
Print debug info as:
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*** Register mapping ***
reg 1024 -> %reg1028
reg 1026 -> EAX
reg 1027 -> %reg1028
instead of:
*** Register mapping ***
reg 1024 -> reg 1028
reg 1026 -> reg 15
reg 1027 -> reg 1028
llvm-svn: 29803
2006-08-21 22:56:29 +00:00
Evan Cheng