e09dbe2732
Move virtual method call out of loop
...
llvm-svn: 18955
2004-12-15 07:04:32 +00:00
784a0dcbd0
Move virtual function call out of loop to speed up getFreePhysReg by about
...
20%, shaving 0.1s off hbd compile time on my g5. Yay.
llvm-svn: 18592
2004-12-07 05:25:53 +00:00
b75e790a2b
* There is no reason for SpillWeights to be an instance var
...
* Do not put fixed registers into the unhandled set. This means they will
never find their way into the inactive, active, or handled sets, so we
can simplify a bunch of code.
llvm-svn: 17945
2004-11-18 06:01:45 +00:00
08ec603bb0
Fix a couple of bugs where we considered physregs past their range as possibly
...
intersecting an interval.
llvm-svn: 17939
2004-11-18 04:33:31 +00:00
49ff5f0477
Start using the iterators in the fixed_ intervals to avoid having to binary
...
search physreg intervals every time we access it. This takes another
half second off of linscan.
llvm-svn: 17937
2004-11-18 04:13:02 +00:00
850852c789
Add a counter for the number of times linscan has to backtrack. Start using
...
the iterator hints we have to speed up overlaps(). This speeds linscan up
by about .2s (out of 8.7) on 175.vpr for PPC.
llvm-svn: 17935
2004-11-18 03:49:30 +00:00
a1f7779876
* Improve comments/documentation substantially
...
* Eliminate the releaseMemory method, this is not an analysis
* Change the fixed, active, and inactive lists of intervals to maintain an
iterator for the current position in the interval. This allows us to do
constant time increments of the iterator instead of having to do a binary
search to find our liverange in our liveinterval all of the time, which
substantially speeds up cases where LiveIntervals have many LiveRanges
- which is very common for physical registers. On targets with many
physregs, this can make a noticable difference.
With a release build of LLC for PPC, this halves the time in
processInactiveIntervals and processActiveIntervals, from 1.5s to .75s.
This also lays the ground for more to come.
llvm-svn: 17933
2004-11-18 02:42:27 +00:00
a51f5eeac1
Rename some methods, use 'begin' instead of 'start', add new LiveInterval
...
iterator/begin/end members.
llvm-svn: 17930
2004-11-18 01:29:39 +00:00
c22ffc26b0
Do not make i have bigger scope that we need
...
llvm-svn: 17483
2004-11-05 04:47:37 +00:00
ddd5229f3b
Free the VirtRegMap at the end of MachineFunction processing instead of at
...
the beginning of processing the next one.
llvm-svn: 16605
2004-09-30 02:02:33 +00:00
a5c04ee50f
Fixes to make LLVM compile with vc7.1.
...
Patch contributed by Paolo Invernizzi!
llvm-svn: 16152
2004-09-03 18:19:51 +00:00
095c3a80f3
Change the way we choose a free register: instead of picking the first
...
free allocatable register, we prefer the a free one with the most uses
of inactive intervals. This causes less spills and performes a bit
better compared to gcc:
Program | GCC/LLC (Before)| GCC/LLC (After)
164.gzip/164.gzip | 0.59 | 0.60
175.vpr/175.vpr | 0.57 | 0.58
176.gcc/176.gcc | 0.59 | 0.61
181.mcf/181.mcf | 0.94 | 0.95
186.crafty/186.crafty | 0.62 | 0.62
197.parser/197.parser | 0.89 | 0.88
252.eon/252.eon | 0.61 | 0.66
253.perlbmk/253.perlbmk | 0.79 | 0.84
254.gap/254.gap | 0.81 | 0.81
255.vortex/255.vortex | 0.92 | 0.93
256.bzip2/256.bzip2 | 0.69 | 0.69
300.twolf/300.twolf | 0.91 | 0.90
llvm-svn: 16147
2004-09-02 21:23:32 +00:00
dcbf893095
We don't need to sort the added vector as unhandled intervals are
...
stored in a binary heap.
llvm-svn: 16143
2004-09-02 18:00:38 +00:00
7c16caa336
Changes For Bug 352
...
Move include/Config and include/Support into include/llvm/Config,
include/llvm/ADT and include/llvm/Support. From here on out, all LLVM
public header files must be under include/llvm/.
llvm-svn: 16137
2004-09-01 22:55:40 +00:00
fae8f6a4fb
Be a bit more efficient when processing the active and inactive
...
lists. Instead of scanning the vector backwards, scan it forward and
swap each element we want to erase. Then at the end erase all removed
intervals at once. This doesn't save much: 0.08s out of 4s when
compiling 176.gcc.
llvm-svn: 16136
2004-09-01 22:52:29 +00:00
e2d962e0fd
Now that LiveIntervals::addIntervalsForSpills is fixed, do not require
...
LiveVariables.
llvm-svn: 16076
2004-08-27 19:00:29 +00:00
efd40bce75
Back out this change as it broke the build last night. This should be
...
investicated further as the linearscan variants don't really need
LiveVariables...
llvm-svn: 16074
2004-08-27 18:01:21 +00:00
11f0fc8eda
The linear scan variants do not require the LiveVariables analysis.
...
llvm-svn: 16071
2004-08-27 04:51:13 +00:00
a698308cce
Convert indentation to 2 spaces.
...
llvm-svn: 15489
2004-08-04 09:46:26 +00:00
83d9b62b28
Add some comments to the backtracking code.
...
llvm-svn: 15200
2004-07-25 08:10:33 +00:00
cf72e7f854
Change std::map<unsigned, LiveInterval*> into a std::map<unsigned,
...
LiveInterval>. This saves some space and removes the pointer
indirection caused by following the pointer.
llvm-svn: 15167
2004-07-24 11:44:15 +00:00
c51866a20e
Completely eliminate the intervals_ list. instead, the r2iMap_ maintains
...
ownership of the intervals.
llvm-svn: 15155
2004-07-24 03:32:06 +00:00
856383326a
Rename LiveIntervals.(cpp|h) -> LiveIntervalAnalysis.(cpp|h)
...
llvm-svn: 15135
2004-07-23 17:56:30 +00:00
1a876fab64
Some compile time improvements resulting in a 1sec speedup in the 5sec
...
compilation of gcc:
* Use vectors instead of lists for the intervals sets
* Use a heap for the unhandled set to keep intervals always sorted and
makes insertions back to the heap very fast (compared to scanning a
list)
llvm-svn: 15103
2004-07-22 08:14:44 +00:00
902dcf0729
These files don't need to include <iostream> since they include "Support/Debug.h".
...
llvm-svn: 15089
2004-07-21 20:50:33 +00:00
12a71ea03e
Remove dead code.
...
llvm-svn: 15011
2004-07-19 23:35:55 +00:00
8c8144b958
Fix assertion to not dereference end!
...
llvm-svn: 14991
2004-07-19 05:02:09 +00:00
70f8dca59b
Add some asserts that the list of intervals returned by addIntervalsForSpills
...
is sorted. This is not the case currently, which is causing no end of
problems.
llvm-svn: 14990
2004-07-19 04:47:36 +00:00
21b3a5b0de
Correctly compute the ration of iterations/#intervals.
...
llvm-svn: 14626
2004-07-04 17:23:35 +00:00
8f3cc0316c
Add efficiency statistic.
...
llvm-svn: 14590
2004-07-04 07:59:06 +00:00
4fbff990b0
Rename Interval class to LiveInterval to avoid conflicting with the already
...
existing llvm::Interval class.
Patch contributed by Vladimir Prus!
http://mail.cs.uiuc.edu/pipermail/llvmbugs/2004-June/000710.html
llvm-svn: 14281
2004-06-21 13:10:56 +00:00
fbe799cfa2
Pull Interval class out of LiveIntervals.
...
llvm-svn: 13910
2004-05-30 07:46:27 +00:00
a5268e8199
When spilling an register, introduce a new temporary for each of its
...
spills. This allows for more flexibility when allocating registers for
spill code.
llvm-svn: 13907
2004-05-30 07:24:39 +00:00
2a54b5d3e1
Add required header
...
llvm-svn: 13417
2004-05-08 03:50:03 +00:00
991425ae70
numeric_limits::infinity() apparently does not work on all systems. As a
...
workaround, use the C HUGE_VAL macro instead.
llvm-svn: 13377
2004-05-06 16:25:59 +00:00
02a5354d9b
Make the set of fixed (preallocated) intervals be a fixed superset of
...
unhandled + handled. So unhandled is now including all fixed intervals
and fixed intervals never changes when processing a function.
llvm-svn: 12462
2004-03-17 00:48:59 +00:00
31953c7a10
Add a spiller option to llc. A simple spiller will come soon. When we get CFG in the machine code represenation a global spiller will also be possible. Also document the linear scan register allocator but mark it as experimental for now.
...
llvm-svn: 12062
2004-03-01 23:18:15 +00:00
b76d234ee9
Add the long awaited memory operand folding support for linear scan
...
llvm-svn: 12058
2004-03-01 20:05:10 +00:00
e669caafe0
Rename member function to be consistent with the rest.
...
llvm-svn: 11898
2004-02-27 06:11:15 +00:00
a9f03fba9d
Remove asssert since it is breaking cases that it shouldn't.
...
llvm-svn: 11841
2004-02-25 22:01:06 +00:00
f5a393a133
Add an assertion
...
llvm-svn: 11830
2004-02-25 19:37:44 +00:00
1dd872ce94
Move machine code rewriter and spiller outside the register
...
allocator.
The implementation is completely rewritten and now employs several
optimizations not exercised before. For example for 164.gzip we have
997 loads and 699 stores vs the 1221 loads and 880 stores we have
before.
llvm-svn: 11798
2004-02-24 08:58:30 +00:00
ab77b05d8c
Remove '4Virt' from member function names as it is obvious.
...
llvm-svn: 11781
2004-02-23 23:47:10 +00:00
c794a9060f
Refactor VirtRegMap out of RegAllocLinearScan as the first part of bug
...
251 (providing a generic machine code rewriter/spiller).
llvm-svn: 11780
2004-02-23 23:08:11 +00:00
52de9e214c
Add number of spilled registers statistic.
...
llvm-svn: 11759
2004-02-23 18:45:32 +00:00
d780ce6462
Remove implementation of default constructor as it is useless now.
...
llvm-svn: 11755
2004-02-23 18:28:35 +00:00
f83cb74b57
Improved PhysRegTracker interface. RegAlloc lazily allocates the register tracker using a std::auto_ptr
...
llvm-svn: 11738
2004-02-23 06:10:13 +00:00
d42c2f24ec
Fix comments in PhysRegTracker and rename isPhysRegAvail to isRegAvail to be consistent with the other two
...
llvm-svn: 11723
2004-02-23 01:25:05 +00:00
1410859484
Pull PhysRegTracker out of RegAllocLinearScan as it can be used by other allocators as well
...
llvm-svn: 11720
2004-02-23 00:53:31 +00:00
486b12b71a
Move LiveIntervals.h to lib/CodeGen since it shouldn't be exposed to other parts of the compiler
...
llvm-svn: 11719
2004-02-23 00:50:15 +00:00
Chris Lattner