Bill Wendling
e23e00ddea
Change names from RA to something unique to get rid of naming conflicts with
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certain linkers...
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@36944 91177308-0d34-0410-b5e6-96231b3b80d8
2007-05-08 19:02:46 +00:00
Devang Patel
1997473cf7
Drop 'const'
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@36662 91177308-0d34-0410-b5e6-96231b3b80d8
2007-05-03 01:11:54 +00:00
Devang Patel
3e15bf33e0
Use 'static const char' instead of 'static const int'.
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Due to darwin gcc bug, one version of darwin linker coalesces
static const int, which defauts PassID based pass identification.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@36652 91177308-0d34-0410-b5e6-96231b3b80d8
2007-05-02 21:39:20 +00:00
Devang Patel
794fd75c67
Do not use typeinfo to identify pass in pass manager.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@36632 91177308-0d34-0410-b5e6-96231b3b80d8
2007-05-01 21:15:47 +00:00
Evan Cheng
6c087e5585
Match MachineFunction::UsedPhysRegs changes.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@36452 91177308-0d34-0410-b5e6-96231b3b80d8
2007-04-25 22:13:27 +00:00
Evan Cheng
92efbfcd2d
Clean up.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@36431 91177308-0d34-0410-b5e6-96231b3b80d8
2007-04-25 07:18:20 +00:00
Evan Cheng
20b0abc24f
Copy coalescing change to prevent a physical register from being pin to a
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long live interval that has low usage density.
1. Change order of coalescing to join physical registers with virtual
registers first before virtual register intervals become too long.
2. Check size and usage density to determine if it's worthwhile to join.
3. If joining is aborted, assign virtual register live interval allocation
preference field to the physical register.
4. Register allocator should try to allocate to the preferred register
first (if available) to create identify moves that can be eliminated.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@36218 91177308-0d34-0410-b5e6-96231b3b80d8
2007-04-17 20:32:26 +00:00
Evan Cheng
2638e1a6b9
First cut trivial re-materialization support.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35208 91177308-0d34-0410-b5e6-96231b3b80d8
2007-03-20 08:13:50 +00:00
Evan Cheng
bc025fbb64
Only add liveinterval to livein set if it isn't assigned a stack slot.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@34593 91177308-0d34-0410-b5e6-96231b3b80d8
2007-02-25 09:39:02 +00:00
Evan Cheng
b371f457b0
Re-apply my liveintervalanalysis changes. Now with PR1207 fixes.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@34428 91177308-0d34-0410-b5e6-96231b3b80d8
2007-02-19 21:49:54 +00:00
Reid Spencer
a284cbf667
For PR1207:
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Revert patches that caused the problem. Evan, please investigate and reapply
when you've discovered the problem.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@34399 91177308-0d34-0410-b5e6-96231b3b80d8
2007-02-19 03:20:00 +00:00
Evan Cheng
e1fd6828af
Do not add livein's to entry MBB twice.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@34382 91177308-0d34-0410-b5e6-96231b3b80d8
2007-02-17 11:11:27 +00:00
Evan Cheng
9fc508fdc4
Add live-ins to every BB.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@34342 91177308-0d34-0410-b5e6-96231b3b80d8
2007-02-16 09:05:02 +00:00
Chris Lattner
cd3245ac45
Eliminate static ctors from Statistics
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@32698 91177308-0d34-0410-b5e6-96231b3b80d8
2006-12-19 22:41:21 +00:00
Chris Lattner
ac0b6ae358
Detemplatize the Statistic class. The only type it is instantiated with
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is 'unsigned'.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@32279 91177308-0d34-0410-b5e6-96231b3b80d8
2006-12-06 17:46:33 +00:00
Chris Lattner
4c7e227973
eliminate fp statistic
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@32251 91177308-0d34-0410-b5e6-96231b3b80d8
2006-12-06 01:48:55 +00:00
Jeff Cohen
97af751deb
Unbreak VC++ build.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@32113 91177308-0d34-0410-b5e6-96231b3b80d8
2006-12-02 02:22:01 +00:00
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