Evan Cheng
3fd728596e
Watch out for cases like this:
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entry (0x8b056f0, LLVM BB @0x8b01b30, ID#0):
Live Ins: %r0 %r1 %r2 %r3
%reg1032 = tMOVrr %r3<kill>
%reg1033 = tMOVri8 1
%reg1034 = tMOVri8 0
tCMPi8 %reg1029<kill>, 0
tBcc mbb<entry,0x8b06a10>, 0
Successors according to CFG: 0x8b06980 0x8b06a10
entry (0x8b06980, LLVM BB @0x8b01b30, ID#12):
Predecessors according to CFG: 0x8b056f0
%reg1036 = tMOVrr %reg1034<kill>
Successors according to CFG: 0x8b06a10
entry (0x8b06a10, LLVM BB @0x8b01b30, ID#13):
Predecessors according to CFG: 0x8b056f0 0x8b06980
%reg1024<dead> = tMOVrr %reg1030<kill>
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reg1030 and r1 have already been joined. When reg1024 and reg1030 are joined,
r1 live range from function entry to the tMOVrr instruction are dead. Eliminate
r1 from the livein set of the entry BB, not the BB where the copy is.
llvm-svn: 34866
2007-03-03 02:18:00 +00:00
Evan Cheng
9d615d1e70
Dead live-in detection bug.
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llvm-svn: 34843
2007-03-02 10:41:15 +00:00
Evan Cheng
9be123c568
Oops.
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llvm-svn: 34768
2007-03-01 02:05:35 +00:00
Evan Cheng
8a703ad4b6
Track all joined registers and eliminate unneeded kills after all joining are done.
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llvm-svn: 34767
2007-03-01 02:03:03 +00:00
Evan Cheng
bdec83e4d2
Joining an interval with a dead copy instruction. Shorten the live range to the last use.
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llvm-svn: 34645
2007-02-26 21:37:37 +00:00
Evan Cheng
0577b51538
Fix a couple of bugs related IsDead back propagation during coalescing.
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llvm-svn: 34595
2007-02-25 09:46:31 +00:00
Evan Cheng
e54eb80720
If the liveinterval of the source instruction has been extended, remove the IsKill marker.
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llvm-svn: 34594
2007-02-25 09:41:59 +00:00
Evan Cheng
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
Evan Cheng
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
Jim Laskey
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
Evan Cheng
e563c7eb27
Out of bound reference.
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llvm-svn: 34461
2007-02-21 02:27:39 +00:00
Evan Cheng
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
Reid Spencer
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
Evan Cheng
2605082f0e
- Changes how function livein's are handled, they now have a start index of 0.
...
- 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
Evan Cheng
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
Evan Cheng
b612316f20
Allow any MachineBasicBlock (not just the entry block) to have live-in physical
...
registers. Make sure liveinterval analysis is correctly creating live ranges
for them.
llvm-svn: 34217
2007-02-13 01:30:55 +00:00
Chris Lattner
aee775a6b7
Eliminate static ctors from Statistics
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llvm-svn: 32698
2006-12-19 22:41:21 +00:00
Bill Wendling
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
Evan Cheng
e312c152d2
MI keeps a ptr of TargetInstrDescriptor, use it.
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llvm-svn: 32296
2006-12-07 01:21:59 +00:00
Chris Lattner
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
Jeff Cohen
cc08c83186
Unbreak VC++ build.
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llvm-svn: 32113
2006-12-02 02:22:01 +00:00
Evan Cheng
67fc141db5
Match TargetInstrInfo changes.
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llvm-svn: 32098
2006-12-01 21:52:58 +00:00
Bill Wendling
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
Bill Wendling
d811cc6818
Don't recompute getNumOperands for each iteration.
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llvm-svn: 31783
2006-11-16 07:35:18 +00:00
Bill Wendling
c7969fd1e7
Added a new method "CreateNewLiveInterval" which, given a list of
...
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
Evan Cheng
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
Evan Cheng
8c9c6d71ed
Add implicit def / use operands to MachineInstr.
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llvm-svn: 31633
2006-11-10 08:43:01 +00:00
Jim Laskey
61feeb90f9
Remove redundant <cmath>.
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llvm-svn: 31561
2006-11-08 19:16:44 +00:00
Chris Lattner
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
Jim Laskey
6a9342166b
Use correct value for float HUGH_VAL.
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llvm-svn: 31500
2006-11-07 12:25:45 +00:00
Chris Lattner
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
Evan Cheng
299022d514
Proper check for two-addressness.
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llvm-svn: 31408
2006-11-03 03:04:46 +00:00
Reid Spencer
de46e48420
For PR786:
...
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
Chris Lattner
8fb3d445f5
Keep track of the start of MBB's in a separate map from instructions. This
...
is faster and is needed for future improvements.
llvm-svn: 30383
2006-09-15 03:57:23 +00:00
Chris Lattner
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
Chris Lattner
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
Chris Lattner
bff0b5969f
Hack around a regression I introduced yesterday
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llvm-svn: 30098
2006-09-04 18:20:15 +00:00
Chris Lattner
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
Chris Lattner
774785a79d
minor speedup
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llvm-svn: 30065
2006-09-03 07:53:50 +00:00
Chris Lattner
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
Chris Lattner
5a56d30906
When joining two intervals where the RHS is really simple, use a light-weight
...
method for joining the live ranges instead of the fully-general one.
llvm-svn: 30049
2006-09-02 05:26:59 +00:00
Chris Lattner
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
Chris Lattner
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
Chris Lattner
f765351978
Iterative coallescing doesn't buy us anything (we get identical results on
...
crafty with and without it). Removing it speeds up live intervals 6%.
llvm-svn: 30010
2006-09-01 04:02:42 +00:00
Chris Lattner
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
Chris Lattner
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
Chris Lattner
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
Chris Lattner
cb74860cce
Fix a compiler crash bootstrapping llvm-gcc.
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llvm-svn: 29989
2006-08-30 23:02:29 +00:00
Chris Lattner
34434e97c9
Teach the coallescer to coallesce live intervals joined by an arbitrary
...
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
Chris Lattner
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