Bill Wendling
54fcc7f704
Replace std::cerr uses of the "DEBUG" macro with "DOUT" instead. Removes
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a #include of iostream.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@31800 91177308-0d34-0410-b5e6-96231b3b80d8
2006-11-17 00:50:36 +00:00
Jim Laskey
d6c3422e31
Remove redundant <cmath>.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@31561 91177308-0d34-0410-b5e6-96231b3b80d8
2006-11-08 19:16:44 +00:00
Jim Laskey
7902c75331
Use correct value for float HUGH_VAL.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@31500 91177308-0d34-0410-b5e6-96231b3b80d8
2006-11-07 12:25:45 +00:00
Jim Laskey
e719d9f8f2
LinearScanner hotspot.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@31153 91177308-0d34-0410-b5e6-96231b3b80d8
2006-10-24 14:35:25 +00:00
Chris Lattner
a4f0b3a084
s|llvm/Support/Visibility.h|llvm/Support/Compiler.h|
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@29911 91177308-0d34-0410-b5e6-96231b3b80d8
2006-08-27 12:54:02 +00:00
Jim Laskey
eb577ba3b8
Final polish on machine pass registries.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@29471 91177308-0d34-0410-b5e6-96231b3b80d8
2006-08-02 12:30:23 +00:00
Jim Laskey
13ec702c43
Introducing plugable register allocators and instruction schedulers.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@29434 91177308-0d34-0410-b5e6-96231b3b80d8
2006-08-01 14:21:23 +00:00
Andrew Lenharth
ed41f1bb19
Reduce number of exported symbols
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@29220 91177308-0d34-0410-b5e6-96231b3b80d8
2006-07-20 17:28:38 +00:00
Chris Lattner
f8c68f694c
Shave another 27K off libllvmgcc.dylib with visibility hidden
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28973 91177308-0d34-0410-b5e6-96231b3b80d8
2006-06-28 22:17:39 +00:00
Evan Cheng
3b6d56cab3
If the register allocator cannot find a register to spill, try the aliases. If
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that still fails (because all the register spill weights are inf), just grab
one.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28262 91177308-0d34-0410-b5e6-96231b3b80d8
2006-05-12 19:07:46 +00:00
Evan Cheng
5d02eafaf2
Backing out previous check-in.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28219 91177308-0d34-0410-b5e6-96231b3b80d8
2006-05-11 07:28:16 +00:00
Evan Cheng
1f300190f3
If the live interval legnth is essentially zero, i.e. in every live range
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the use follows def immediately, it doesn't make sense to spill it and
hope it will be easier to allocate for this LI.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28217 91177308-0d34-0410-b5e6-96231b3b80d8
2006-05-10 22:30:41 +00:00
Chris Lattner
c8e2c5561c
Add some comments.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@27133 91177308-0d34-0410-b5e6-96231b3b80d8
2006-03-25 23:00:56 +00:00
Chris Lattner
ffab42263a
Code cleanups, no functionality change
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@26328 91177308-0d34-0410-b5e6-96231b3b80d8
2006-02-23 06:44:17 +00:00
Chris Lattner
2c2c6c61f1
Add explicit #includes of <iostream>
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@25515 91177308-0d34-0410-b5e6-96231b3b80d8
2006-01-22 23:41:00 +00:00
Duraid Madina
3005961701
HB is *the* code janitor.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@25031 91177308-0d34-0410-b5e6-96231b3b80d8
2005-12-28 04:55:42 +00:00
Duraid Madina
e0b632a5d8
I think I know what you meant here, but just to be safe I'll let you
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do it. :)
<_sabre_> excuses excuses
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@24471 91177308-0d34-0410-b5e6-96231b3b80d8
2005-11-21 14:09:40 +00:00
Chris Lattner
ac28fbd043
Add section switching to common code generator code. Add a couple of
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asserts.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@24445 91177308-0d34-0410-b5e6-96231b3b80d8
2005-11-21 07:06:27 +00:00
Chris Lattner
3c3fe462f7
Expose the LiveInterval interfaces as public headers.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23400 91177308-0d34-0410-b5e6-96231b3b80d8
2005-09-21 04:19:09 +00:00
Chris Lattner
e836ad6736
When checking the fixed intervals, don't forget to check for register aliases.
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This fixes PR621 and Regression/CodeGen/X86/2005-08-30-RegAllocAliasProblem.ll
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23158 91177308-0d34-0410-b5e6-96231b3b80d8
2005-08-30 21:03:36 +00:00
Chris Lattner
b980578b41
Keep track of which registers are related to which other registers.
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Use this information to avoid doing expensive interval intersections for
registers that could not possible be interesting. This speeds up linscan
on ia64 compiling kc++ in release mode from taking 7.82s to 4.8s(!), total
itanium llc time on this program is 27.3s now. This marginally speeds up
PPC and X86, but they appear to be limited by other parts of linscan, not
this code.
On this program, on itanium, live intervals now takes 41% of llc time.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22986 91177308-0d34-0410-b5e6-96231b3b80d8
2005-08-23 22:27:31 +00:00
Chris Lattner
a411cbca5c
Try to avoid scanning the fixed list. On architectures with a non-stupid
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number of regs (e.g. most riscs), many functions won't need to use callee
clobbered registers. Do a speculative check to see if we can get a free
register without processing the fixed list (which has all of these). This
saves a lot of time on machines with lots of callee clobbered regs (e.g.
ppc and itanium, also x86).
This reduces ppc llc compile time from 184s -> 172s on kc++. This is probably
worth FAR FAR more on itanium though.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22972 91177308-0d34-0410-b5e6-96231b3b80d8
2005-08-22 20:59:30 +00:00
Chris Lattner
a6c1750362
Move some code in the register assignment case that only needs to happen if
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we spill out of the fast path. The scan of active_ and the calls to
updateSpillWeights don't need to happen unless a spill occurs. This reduces
debug llc time of kc++ with ppc from 187.3s to 183.2s.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22971 91177308-0d34-0410-b5e6-96231b3b80d8
2005-08-22 20:20:42 +00:00
Chris Lattner
f8355d9846
Speed up this loop a bit, based on some observations that Nate made, and
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add some comments. This loop really needs to be reevaluated!
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22966 91177308-0d34-0410-b5e6-96231b3b80d8
2005-08-22 16:55:22 +00:00
Misha Brukman
edf128a7fa
Remove trailing whitespace
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21420 91177308-0d34-0410-b5e6-96231b3b80d8
2005-04-21 22:36:52 +00:00
Chris Lattner
b0f31bf19b
Update these register allocators to set the PhysRegUsed info in MachineFunction.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19791 91177308-0d34-0410-b5e6-96231b3b80d8
2005-01-23 22:45:13 +00:00
Chris Lattner
5e5fb942e6
Silence VS warnings
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19385 91177308-0d34-0410-b5e6-96231b3b80d8
2005-01-08 19:53:50 +00:00
Chris Lattner
5b2103405b
Move virtual method call out of loop
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@18955 91177308-0d34-0410-b5e6-96231b3b80d8
2004-12-15 07:04:32 +00:00
Nate Begeman
80ad87d227
Move virtual function call out of loop to speed up getFreePhysReg by about
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20%, shaving 0.1s off hbd compile time on my g5. Yay.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@18592 91177308-0d34-0410-b5e6-96231b3b80d8
2004-12-07 05:25:53 +00:00
Chris Lattner
c8b9f33ac0
* There is no reason for SpillWeights to be an instance var
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* 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.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@17945 91177308-0d34-0410-b5e6-96231b3b80d8
2004-11-18 06:01:45 +00:00
Chris Lattner
f348e3abfc
Fix a couple of bugs where we considered physregs past their range as possibly
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intersecting an interval.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@17939 91177308-0d34-0410-b5e6-96231b3b80d8
2004-11-18 04:33:31 +00:00
Chris Lattner
365b95fbbc
Start using the iterators in the fixed_ intervals to avoid having to binary
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search physreg intervals every time we access it. This takes another
half second off of linscan.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@17937 91177308-0d34-0410-b5e6-96231b3b80d8
2004-11-18 04:13:02 +00:00
Chris Lattner
19828d46f6
Add a counter for the number of times linscan has to backtrack. Start using
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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.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@17935 91177308-0d34-0410-b5e6-96231b3b80d8
2004-11-18 03:49:30 +00:00
Chris Lattner
cbb5625cec
* Improve comments/documentation substantially
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* 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.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@17933 91177308-0d34-0410-b5e6-96231b3b80d8
2004-11-18 02:42:27 +00:00
Chris Lattner
23b71c1e1e
Rename some methods, use 'begin' instead of 'start', add new LiveInterval
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iterator/begin/end members.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@17930 91177308-0d34-0410-b5e6-96231b3b80d8
2004-11-18 01:29:39 +00:00
Chris Lattner
41ffe4b531
Do not make i have bigger scope that we need
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@17483 91177308-0d34-0410-b5e6-96231b3b80d8
2004-11-05 04:47:37 +00:00
Chris Lattner
510a3ea646
Free the VirtRegMap at the end of MachineFunction processing instead of at
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the beginning of processing the next one.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@16605 91177308-0d34-0410-b5e6-96231b3b80d8
2004-09-30 02:02:33 +00:00
Alkis Evlogimenos
20aa474f8f
Fixes to make LLVM compile with vc7.1.
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Patch contributed by Paolo Invernizzi!
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@16152 91177308-0d34-0410-b5e6-96231b3b80d8
2004-09-03 18:19:51 +00:00
Alkis Evlogimenos
84f5bcb013
Change the way we choose a free register: instead of picking the first
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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
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@16147 91177308-0d34-0410-b5e6-96231b3b80d8
2004-09-02 21:23:32 +00:00
Alkis Evlogimenos
82b4955f96
We don't need to sort the added vector as unhandled intervals are
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stored in a binary heap.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@16143 91177308-0d34-0410-b5e6-96231b3b80d8
2004-09-02 18:00:38 +00:00
Reid Spencer
551ccae044
Changes For Bug 352
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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/.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@16137 91177308-0d34-0410-b5e6-96231b3b80d8
2004-09-01 22:55:40 +00:00
Alkis Evlogimenos
ed543731fb
Be a bit more efficient when processing the active and inactive
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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.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@16136 91177308-0d34-0410-b5e6-96231b3b80d8
2004-09-01 22:52:29 +00:00
Alkis Evlogimenos
ca5d1c378c
Now that LiveIntervals::addIntervalsForSpills is fixed, do not require
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LiveVariables.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@16076 91177308-0d34-0410-b5e6-96231b3b80d8
2004-08-27 19:00:29 +00:00
Alkis Evlogimenos
ccdf21af1f
Back out this change as it broke the build last night. This should be
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investicated further as the linearscan variants don't really need
LiveVariables...
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@16074 91177308-0d34-0410-b5e6-96231b3b80d8
2004-08-27 18:01:21 +00:00
Alkis Evlogimenos
3f06e68783
The linear scan variants do not require the LiveVariables analysis.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@16071 91177308-0d34-0410-b5e6-96231b3b80d8
2004-08-27 04:51:13 +00:00
Alkis Evlogimenos
1a8ea01f01
Convert indentation to 2 spaces.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@15489 91177308-0d34-0410-b5e6-96231b3b80d8
2004-08-04 09:46:26 +00:00
Alkis Evlogimenos
5a0a1c2cba
Add some comments to the backtracking code.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@15200 91177308-0d34-0410-b5e6-96231b3b80d8
2004-07-25 08:10:33 +00:00
Alkis Evlogimenos
a1613db62f
Change std::map<unsigned, LiveInterval*> into a std::map<unsigned,
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LiveInterval>. This saves some space and removes the pointer
indirection caused by following the pointer.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@15167 91177308-0d34-0410-b5e6-96231b3b80d8
2004-07-24 11:44:15 +00:00
Chris Lattner
4df98e546d
Completely eliminate the intervals_ list. instead, the r2iMap_ maintains
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ownership of the intervals.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@15155 91177308-0d34-0410-b5e6-96231b3b80d8
2004-07-24 03:32:06 +00:00
Chris Lattner
a3b8b5c0e0
Rename LiveIntervals.(cpp|h) -> LiveIntervalAnalysis.(cpp|h)
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@15135 91177308-0d34-0410-b5e6-96231b3b80d8
2004-07-23 17:56:30 +00:00
Alkis Evlogimenos
53eb37340c
Some compile time improvements resulting in a 1sec speedup in the 5sec
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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)
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@15103 91177308-0d34-0410-b5e6-96231b3b80d8
2004-07-22 08:14:44 +00:00
Brian Gaeke
7848e68c16
These files don't need to include <iostream> since they include "Support/Debug.h".
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@15089 91177308-0d34-0410-b5e6-96231b3b80d8
2004-07-21 20:50:33 +00:00
Alkis Evlogimenos
da77c44c2c
Remove dead code.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@15011 91177308-0d34-0410-b5e6-96231b3b80d8
2004-07-19 23:35:55 +00:00
Chris Lattner
331cb7dde1
Fix assertion to not dereference end!
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@14991 91177308-0d34-0410-b5e6-96231b3b80d8
2004-07-19 05:02:09 +00:00
Chris Lattner
59073e02cc
Add some asserts that the list of intervals returned by addIntervalsForSpills
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is sorted. This is not the case currently, which is causing no end of
problems.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@14990 91177308-0d34-0410-b5e6-96231b3b80d8
2004-07-19 04:47:36 +00:00
Alkis Evlogimenos
c156095b17
Correctly compute the ration of iterations/#intervals.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@14626 91177308-0d34-0410-b5e6-96231b3b80d8
2004-07-04 17:23:35 +00:00
Alkis Evlogimenos
d55b2b1067
Add efficiency statistic.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@14590 91177308-0d34-0410-b5e6-96231b3b80d8
2004-07-04 07:59:06 +00:00
Chris Lattner
418da55c89
Rename Interval class to LiveInterval to avoid conflicting with the already
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existing llvm::Interval class.
Patch contributed by Vladimir Prus!
http://mail.cs.uiuc.edu/pipermail/llvmbugs/2004-June/000710.html
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@14281 91177308-0d34-0410-b5e6-96231b3b80d8
2004-06-21 13:10:56 +00:00
Alkis Evlogimenos
6924063bf2
Pull Interval class out of LiveIntervals.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@13910 91177308-0d34-0410-b5e6-96231b3b80d8
2004-05-30 07:46:27 +00:00
Alkis Evlogimenos
26f5a69e52
When spilling an register, introduce a new temporary for each of its
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spills. This allows for more flexibility when allocating registers for
spill code.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@13907 91177308-0d34-0410-b5e6-96231b3b80d8
2004-05-30 07:24:39 +00:00
Alkis Evlogimenos
880e8e4b4c
Add required header
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@13417 91177308-0d34-0410-b5e6-96231b3b80d8
2004-05-08 03:50:03 +00:00
Chris Lattner
a19eedeb7a
numeric_limits::infinity() apparently does not work on all systems. As a
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workaround, use the C HUGE_VAL macro instead.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@13377 91177308-0d34-0410-b5e6-96231b3b80d8
2004-05-06 16:25:59 +00:00
Alkis Evlogimenos
eee91172fb
Make the set of fixed (preallocated) intervals be a fixed superset of
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unhandled + handled. So unhandled is now including all fixed intervals
and fixed intervals never changes when processing a function.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@12462 91177308-0d34-0410-b5e6-96231b3b80d8
2004-03-17 00:48:59 +00:00
Alkis Evlogimenos
dd420e060a
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.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@12062 91177308-0d34-0410-b5e6-96231b3b80d8
2004-03-01 23:18:15 +00:00
Alkis Evlogimenos
5f37502bfb
Add the long awaited memory operand folding support for linear scan
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@12058 91177308-0d34-0410-b5e6-96231b3b80d8
2004-03-01 20:05:10 +00:00
Alkis Evlogimenos
fc54e83cea
Rename member function to be consistent with the rest.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11898 91177308-0d34-0410-b5e6-96231b3b80d8
2004-02-27 06:11:15 +00:00
Alkis Evlogimenos
1d8b28a357
Remove asssert since it is breaking cases that it shouldn't.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11841 91177308-0d34-0410-b5e6-96231b3b80d8
2004-02-25 22:01:06 +00:00
Chris Lattner
95c34f2efd
Add an assertion
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11830 91177308-0d34-0410-b5e6-96231b3b80d8
2004-02-25 19:37:44 +00:00
Alkis Evlogimenos
0d6c5b6489
Move machine code rewriter and spiller outside the register
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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.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11798 91177308-0d34-0410-b5e6-96231b3b80d8
2004-02-24 08:58:30 +00:00
Alkis Evlogimenos
797428719f
Remove '4Virt' from member function names as it is obvious.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11781 91177308-0d34-0410-b5e6-96231b3b80d8
2004-02-23 23:47:10 +00:00
Alkis Evlogimenos
34d9bc9f16
Refactor VirtRegMap out of RegAllocLinearScan as the first part of bug
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251 (providing a generic machine code rewriter/spiller).
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11780 91177308-0d34-0410-b5e6-96231b3b80d8
2004-02-23 23:08:11 +00:00
Alkis Evlogimenos
575649322f
Add number of spilled registers statistic.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11759 91177308-0d34-0410-b5e6-96231b3b80d8
2004-02-23 18:45:32 +00:00
Alkis Evlogimenos
e6394e2b62
Remove implementation of default constructor as it is useless now.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11755 91177308-0d34-0410-b5e6-96231b3b80d8
2004-02-23 18:28:35 +00:00
Alkis Evlogimenos
12edc7ef3d
Improved PhysRegTracker interface. RegAlloc lazily allocates the register tracker using a std::auto_ptr
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11738 91177308-0d34-0410-b5e6-96231b3b80d8
2004-02-23 06:10:13 +00:00
Alkis Evlogimenos
534f545ef1
Fix comments in PhysRegTracker and rename isPhysRegAvail to isRegAvail to be consistent with the other two
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11723 91177308-0d34-0410-b5e6-96231b3b80d8
2004-02-23 01:25:05 +00:00
Alkis Evlogimenos
888b1a6ccd
Pull PhysRegTracker out of RegAllocLinearScan as it can be used by other allocators as well
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11720 91177308-0d34-0410-b5e6-96231b3b80d8
2004-02-23 00:53:31 +00:00
Alkis Evlogimenos
a2f6a408dc
Move LiveIntervals.h to lib/CodeGen since it shouldn't be exposed to other parts of the compiler
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11719 91177308-0d34-0410-b5e6-96231b3b80d8
2004-02-23 00:50:15 +00:00
Alkis Evlogimenos
0f338a1e8c
Print basic block boundaries in machine instruction debug output.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11704 91177308-0d34-0410-b5e6-96231b3b80d8
2004-02-22 05:46:04 +00:00
Alkis Evlogimenos
fa510c4af5
Fix crash in debug output.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11659 91177308-0d34-0410-b5e6-96231b3b80d8
2004-02-20 06:41:12 +00:00
Alkis Evlogimenos
537fa9838d
Fix instruction numbering in debug output.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11655 91177308-0d34-0410-b5e6-96231b3b80d8
2004-02-20 06:29:51 +00:00
Alkis Evlogimenos
39a0d5c112
Too many changes in one commit:
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1. LiveIntervals now implement a 4 slot per instruction model. Load,
Use, Def and a Store slot. This is required in order to correctly
represent caller saved register clobbering on function calls,
register reuse in the same instruction (def resues last use) and
also spill code added later by the allocator. The previous
representation (2 slots per instruction) was insufficient and as a
result was causing subtle bugs.
2. Fixes in spill code generation. This was the major cause of
failures in the test suite.
3. Linear scan now has core support for folding memory operands. This
is untested and not enabled (the live interval update function does
not attempt to fold loads/stores in instructions).
4. Lots of improvements in the debugging output of both live intervals
and linear scan. Give it a try... it is beautiful :-)
In summary the above fixes all the issues with the recent reserved
register elimination changes and get the allocator very close to the
next big step: folding memory operands.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11654 91177308-0d34-0410-b5e6-96231b3b80d8
2004-02-20 06:15:40 +00:00
Alkis Evlogimenos
d195e99bc8
Fix RA::verifyAssignment()
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11629 91177308-0d34-0410-b5e6-96231b3b80d8
2004-02-19 19:24:17 +00:00
Alkis Evlogimenos
2acef2da06
Rename reloads/spills to loads/stores.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11619 91177308-0d34-0410-b5e6-96231b3b80d8
2004-02-19 06:19:09 +00:00
Alkis Evlogimenos
779e640657
Implement assignment correctness verification.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11609 91177308-0d34-0410-b5e6-96231b3b80d8
2004-02-18 23:15:23 +00:00
Alkis Evlogimenos
843b160a20
Eliminate the use of spill (reserved) registers.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11476 91177308-0d34-0410-b5e6-96231b3b80d8
2004-02-15 10:24:21 +00:00
Alkis Evlogimenos
6ab5c15962
Use std::numeric_limits<float>::infinity() instead of
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std::numeric_limits<float>::max() for weighting preallocated
intervals.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11427 91177308-0d34-0410-b5e6-96231b3b80d8
2004-02-14 00:44:07 +00:00
Alkis Evlogimenos
be766c7246
Remove getAllocatedRegNum(). Use getReg() instead.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11393 91177308-0d34-0410-b5e6-96231b3b80d8
2004-02-13 21:01:20 +00:00
Alkis Evlogimenos
c0b9dc5be7
Change MachineBasicBlock's vector of MachineInstr pointers into an
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ilist of MachineInstr objects. This allows constant time removal and
insertion of MachineInstr instances from anywhere in each
MachineBasicBlock. It also allows for constant time splicing of
MachineInstrs into or out of MachineBasicBlocks.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11340 91177308-0d34-0410-b5e6-96231b3b80d8
2004-02-12 02:27:10 +00:00
Chris Lattner
1cbe4d0ad0
Do not use MachineOperand::isVirtualRegister either!
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11283 91177308-0d34-0410-b5e6-96231b3b80d8
2004-02-10 21:12:22 +00:00
Alkis Evlogimenos
f5eaf16b94
Increase code clarity.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11151 91177308-0d34-0410-b5e6-96231b3b80d8
2004-02-06 18:08:18 +00:00
Alkis Evlogimenos
54d23c754a
Eliminate uneeded lookups by passing a Virt2PhysMap::iterator instead
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of the virtual register to certain functions.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11143 91177308-0d34-0410-b5e6-96231b3b80d8
2004-02-06 03:15:40 +00:00
Alkis Evlogimenos
14be64018f
Modify the two address instruction pass to remove the duplicate
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operand of the instruction and thus simplify the register allocation.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11124 91177308-0d34-0410-b5e6-96231b3b80d8
2004-02-04 22:17:40 +00:00
Alkis Evlogimenos
4e7854407c
When an instruction like: A += B had both A and B virtual registers
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spilled, A was loaded from its stack location twice. This fixes the bug.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11093 91177308-0d34-0410-b5e6-96231b3b80d8
2004-02-03 01:13:07 +00:00
Alkis Evlogimenos
cc6a1290fc
Fix debugging output.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11088 91177308-0d34-0410-b5e6-96231b3b80d8
2004-02-02 22:00:32 +00:00
Alkis Evlogimenos
22b7e44bb0
Create an object for tracking physical register usage. This will look
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much better when I get rid of the reserved registers.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11066 91177308-0d34-0410-b5e6-96231b3b80d8
2004-02-02 07:30:36 +00:00
Alkis Evlogimenos
04667297af
Change weight array into a vector and make it as big as the number of
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registers (not as the max number of registers).
Change toSpill from a std::set into a std::vector<bool>.
Use the reverse iterator adapter to do a reverse scan of allocatable
registers.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11061 91177308-0d34-0410-b5e6-96231b3b80d8
2004-02-01 20:13:26 +00:00
Alkis Evlogimenos
f440cc19c9
Use std::map::count() instead of std::map::find() != std::map::end()
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where appropriate.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11060 91177308-0d34-0410-b5e6-96231b3b80d8
2004-02-01 18:39:53 +00:00
Alkis Evlogimenos
4f67b86648
Use MRegisterInfo::isPhysicalRegister and
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MRegisterInfo::isVirtualRegister.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11045 91177308-0d34-0410-b5e6-96231b3b80d8
2004-02-01 01:27:01 +00:00
Alkis Evlogimenos
e88280a422
Add option to join live intervals. Two intervals are joined if there
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is a move between two registers, at least one of the registers is
virtual and the two live intervals do not overlap.
This results in about 40% reduction in intervals, 30% decrease in the
register allocators running time and a 20% increase in peephole
optimizations (mainly move eliminations).
The option can be enabled by passing -join-liveintervals where
appropriate.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10965 91177308-0d34-0410-b5e6-96231b3b80d8
2004-01-22 23:08:45 +00:00
Alkis Evlogimenos
84dc5fb6ba
Remove unneeded check. An interval in active, by definition overlaps
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with the current one.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10959 91177308-0d34-0410-b5e6-96231b3b80d8
2004-01-22 20:07:18 +00:00
Alkis Evlogimenos
ce50115006
Improve debugging output. Remove unneeded virtReg->0 mapping when
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virtReg lives on the stack. Now a virtual register has an entry in the
virtual->physical map or the virtual->stack slot map but never in
both.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10958 91177308-0d34-0410-b5e6-96231b3b80d8
2004-01-22 19:24:43 +00:00
Alkis Evlogimenos
a12c7bb06f
Handle printing of intervals that are not assign to any physical
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register yet (2nd try).
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10896 91177308-0d34-0410-b5e6-96231b3b80d8
2004-01-16 20:33:13 +00:00
Alkis Evlogimenos
a6d8c3f845
Handle printing of intervals that are not assign to any physical
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register yet.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10895 91177308-0d34-0410-b5e6-96231b3b80d8
2004-01-16 20:29:42 +00:00
Alkis Evlogimenos
3b02cbe752
Fold open interval ends handling into
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LiveIntervals::Interval::expiredAt() and simplify regalloc code.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10894 91177308-0d34-0410-b5e6-96231b3b80d8
2004-01-16 20:17:05 +00:00
Alkis Evlogimenos
5ab20273a4
Improve debugging output.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10834 91177308-0d34-0410-b5e6-96231b3b80d8
2004-01-14 00:09:36 +00:00
Alkis Evlogimenos
b7be115140
Indentation and whitespace cleanups.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10820 91177308-0d34-0410-b5e6-96231b3b80d8
2004-01-13 20:42:08 +00:00
Alkis Evlogimenos
f7df173e3b
Fix bug introduced by previous commit: check if fixed intervals
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overlap before adding their spill weight.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10819 91177308-0d34-0410-b5e6-96231b3b80d8
2004-01-13 20:37:01 +00:00
Alkis Evlogimenos
7d629b50a5
Add a separate list of fixed intervals. This improves the running time
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of the register allocator as follows:
before after
mesa 2.3790 1.5994
vpr 2.6008 1.2078
gcc 1.9840 0.5273
mcf 0.2569 0.0470
eon 1.8468 1.4359
twolf 0.9475 0.2004
burg 1.6807 1.3300
lambda 1.2191 0.3764
Speedups range anyware from 30% to over 400% :-)
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10712 91177308-0d34-0410-b5e6-96231b3b80d8
2004-01-07 09:20:58 +00:00
Alkis Evlogimenos
1283d86b63
Minor cleanups.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10711 91177308-0d34-0410-b5e6-96231b3b80d8
2004-01-07 05:31:12 +00:00
Alkis Evlogimenos
75ca6a3e82
Remove declared but undefined method.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10710 91177308-0d34-0410-b5e6-96231b3b80d8
2004-01-07 02:29:33 +00:00
Alkis Evlogimenos
63caedf046
Remove simple coalescing.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10695 91177308-0d34-0410-b5e6-96231b3b80d8
2004-01-05 08:24:57 +00:00
Alkis Evlogimenos
27490a6fcc
Reserve ECX and EDI instead of EBX and EDI. Since EBX is a callee
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saved register it has a longer free range than ECX (which is defined
every time there is a fnuction call) which makes ECX a better register
to reserve.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10635 91177308-0d34-0410-b5e6-96231b3b80d8
2003-12-28 18:03:52 +00:00
Alkis Evlogimenos
26bfc08b80
Add coalescing to register allocator. A hint is added to each interval
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which denotes the register we would like to be assigned to (virtual or
physical). In register allocation, if this hint exists and we can map
it to a physical register (it is either a physical register or it is a
virtual register that already got assigned to a physical one) we use
that register if it is available instead of a random one in the free
pool.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10634 91177308-0d34-0410-b5e6-96231b3b80d8
2003-12-28 17:58:18 +00:00
Alkis Evlogimenos
843397c237
Improve debugging output when choosing a register to spill.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10604 91177308-0d34-0410-b5e6-96231b3b80d8
2003-12-24 18:53:31 +00:00
Alkis Evlogimenos
3bf564a95f
Change the way free regusters are computed and perform better
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allocation in the presence of preallocated intervals.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10595 91177308-0d34-0410-b5e6-96231b3b80d8
2003-12-23 18:00:33 +00:00
Alkis Evlogimenos
4de1fefd7c
Remove verifyIntervals() since it doesn't actually work right now.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10570 91177308-0d34-0410-b5e6-96231b3b80d8
2003-12-21 20:41:26 +00:00
Alkis Evlogimenos
6b4edbaaf9
Change weight into a float so that we can take into account the
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nesting level when computing it. Right now the allocator uses:
w = sum_over_defs_uses( 10 ^ nesting level );
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10569 91177308-0d34-0410-b5e6-96231b3b80d8
2003-12-21 20:19:10 +00:00
Alkis Evlogimenos
169cfd0196
Add support for inactive intervals. This effectively reuses registers
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for live ranges that fall into assigned registers' holes.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10566 91177308-0d34-0410-b5e6-96231b3b80d8
2003-12-21 05:43:40 +00:00
Chris Lattner
5e46b513f3
Prune some #includes
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Add a statistic for # reloads
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10518 91177308-0d34-0410-b5e6-96231b3b80d8
2003-12-18 20:25:31 +00:00
Alkis Evlogimenos
a71e05acdd
Modify linear scan register allocator to use the two-address
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instruction pass. This also fixes all remaining bugs for this new
allocator to pass all tests under test/Programs.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10515 91177308-0d34-0410-b5e6-96231b3b80d8
2003-12-18 13:15:02 +00:00
Alkis Evlogimenos
a3d0e5c2b2
Fix bug in reserved registers. DH actually aliases DX and EDX which
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are not reserved registers.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10514 91177308-0d34-0410-b5e6-96231b3b80d8
2003-12-18 13:12:18 +00:00
Alkis Evlogimenos
485ec3c21e
Rename LiveIntervals::expired() to LiveIntervals::expiredAt().
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10511 91177308-0d34-0410-b5e6-96231b3b80d8
2003-12-18 08:56:11 +00:00
Alkis Evlogimenos
4d7af65903
Change interface of MachineOperand as follows:
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a) remove opIsUse(), opIsDefOnly(), opIsDefAndUse()
b) add isUse(), isDef()
c) rename opHiBits32() to isHiBits32(),
opLoBits32() to isLoBits32(),
opHiBits64() to isHiBits64(),
opLoBits64() to isLoBits64().
This results to much more readable code, for example compare
"op.opIsDef() || op.opIsDefAndUse()" to "op.isDef()" a pattern used
very often in the code.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10461 91177308-0d34-0410-b5e6-96231b3b80d8
2003-12-14 13:24:17 +00:00
Alkis Evlogimenos
94743e4915
When reserving a preallocated register spill the aliases of this
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register too.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10450 91177308-0d34-0410-b5e6-96231b3b80d8
2003-12-13 11:58:10 +00:00
Alkis Evlogimenos
7d65a12fe6
Expire any active intervals left when register allocation is done.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10448 91177308-0d34-0410-b5e6-96231b3b80d8
2003-12-13 05:50:19 +00:00
Alkis Evlogimenos
f6e610c27d
Add instruction numbers to debugging output.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10447 91177308-0d34-0410-b5e6-96231b3b80d8
2003-12-13 05:48:57 +00:00
Alkis Evlogimenos
49787e35c3
Fix bug in register spilling when a preallocated live range overlaps a
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potential register assignment.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10291 91177308-0d34-0410-b5e6-96231b3b80d8
2003-12-05 11:17:55 +00:00
Alkis Evlogimenos
69546d5f84
Improve debugging output and clean up some code.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10288 91177308-0d34-0410-b5e6-96231b3b80d8
2003-12-04 03:57:28 +00:00
Alkis Evlogimenos
585870759b
Print instructions before register allocation is performed. Also fix
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bug where spill instructions were added to the next basic block
instead of the end of the current one if the instruction that required
the spill was the last in the block.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10272 91177308-0d34-0410-b5e6-96231b3b80d8
2003-11-30 23:40:39 +00:00
Alkis Evlogimenos
99d1a8f048
Remove "numReloaded" statistic.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10268 91177308-0d34-0410-b5e6-96231b3b80d8
2003-11-30 05:15:36 +00:00
Alkis Evlogimenos
ff0cbe175d
Merging the linear scan register allocator in trunk. It currently passes most tests under test/Programs/SingleSource/Benchmarks/Shootout so development will continue on trunk. The allocator is not enabled by default. You will need to pass -regallo=linearscan to lli or llc to use it.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10103 91177308-0d34-0410-b5e6-96231b3b80d8
2003-11-20 03:32:25 +00:00