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149 Commits

Author SHA1 Message Date
David Greene
2513330de8 Factor live variable analysis so it does not do register coalescing 
simultaneously.  Move that pass to SimpleRegisterCoalescing.

This makes it easier to implement alternative register allocation and
coalescing strategies while maintaining reuse of the existing live
interval analysis.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37520 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-06-08 17:18:56 +00:00
Bill Wendling
e23e00ddea Change names from RA to something unique to get rid of naming conflicts with 
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' 
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'. 
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. 
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. 
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. 
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 
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. 
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. 
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. 
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: 
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. 
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. 
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 
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 
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 
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. 
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 
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>. 
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. 
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. 
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| 
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. 
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. 
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 
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 
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 
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. 
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 
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. 
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 
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> 
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. 
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 
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 
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. 
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. 
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. 
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 
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 
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 
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 
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. 
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 
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 
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 
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 
* 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 
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 
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