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865 Commits

Author SHA1 Message Date
Chris Lattner
b21ec54e61 Add #include 
llvm-svn: 11285
 2004-02-10 21:18:55 +00:00
Chris Lattner
5dd5be3ec3 Do not use MachineOperand::isVirtualRegister either! 
llvm-svn: 11283
 2004-02-10 21:12:22 +00:00
Chris Lattner
373fba5c1d Eliminate users of MachineOperand::isPhysicalRegister 
llvm-svn: 11278
 2004-02-10 20:41:10 +00:00
Brian Gaeke
2e1cbb735d Move InstrSchedule's iterator begin/end methods inline. 
llvm-svn: 11239
 2004-02-09 18:42:46 +00:00
Brian Gaeke
312e3a28d2 Make SchedGraph::dump() use SchedGraphNodeCommon's const_iterator 
instead of randomly groping about inside its outEdges array.
Make SchedGraph::addDummyEdges() use getNumOutEdges() instead of
outEdges.size().
Get rid of ifdefed-out code in SchedGraph::buildGraph().

llvm-svn: 11238
 2004-02-09 18:42:05 +00:00
Chris Lattner
80cbed4f61 Another nice speedup for the register allocator. This time, we replace 
the Virt2PhysRegMap std::map with an std::vector.  This speeds up the
register allocator another (almost) 40%, from .72->.45s in a release build
of LLC on 253.perlbmk.

llvm-svn: 11219
 2004-02-09 02:12:04 +00:00
Chris Lattner
bbd9a43d20 Ugh, perform an optimization that GCC should be able to do itself. This 
speeds up livevar from .48/.32s -> .45/.31s in LLC on perlbmk

llvm-svn: 11217
 2004-02-09 01:43:23 +00:00
Chris Lattner
26407384ec Only do stuff for the REAL number of physical registers we have, not 1024. 
This speeds up live variables a lot, from .60/.39s -> .47/.26s in LLC, for
the first/second pass respectively.

llvm-svn: 11216
 2004-02-09 01:35:21 +00:00
Chris Lattner
490627a404 Change the PhysRegsUsed map into a dense array. Seeing that this is a mapping 
from physical registers, and they are always dense, it makes sense to not have
a ton of RBtree overhead.  This change speeds up regalloclocal about ~30% on
253.perlbmk, from .35s -> .27s in the JIT (in LLC, it goes from .74 -> .55).

Now live variable analysis is the slowest codegen pass.  Of course it doesn't
help that we have to run it twice, because regalloclocal doesn't update it,
but even if it did it would be the slowest pass (now it's just the 2x slowest
pass :(

llvm-svn: 11215
 2004-02-09 01:26:13 +00:00
Alkis Evlogimenos
e82a70766e Increase code clarity. 
llvm-svn: 11151
 2004-02-06 18:08:18 +00:00
Alkis Evlogimenos
cd2e7ffcc6 Eliminate uneeded lookups by passing a Virt2PhysMap::iterator instead 
of the virtual register to certain functions.

llvm-svn: 11143
 2004-02-06 03:15:40 +00:00
Alkis Evlogimenos
a97abeb342 Change live interval representation. Machine instructions now have two 
slots each. As a concequence they get numbered as 0, 2, 4 and so
on. The first slot is used for operand uses and the second for
defs. Here's an example:

0: A = ...
2: B = ...
4: C = A + B ;; last use of A

The live intervals should look like:

A = [1, 5)
B = [3, x)
C = [5, y)

llvm-svn: 11141
 2004-02-05 22:55:25 +00:00
Alkis Evlogimenos
1165c1081e We don't need to scan the blocks that we are live-in on every 
access. Rather we only have to do it on the creation of the interval.

llvm-svn: 11135
 2004-02-05 20:45:40 +00:00
Tanya Lattner
dd0c255d14 Added missing include. 
llvm-svn: 11129
 2004-02-05 05:04:39 +00:00
Alkis Evlogimenos
327426411e Modify the two address instruction pass to remove the duplicate 
operand of the instruction and thus simplify the register allocation.

llvm-svn: 11124
 2004-02-04 22:17:40 +00:00
Alkis Evlogimenos
3d100ef0ca When an instruction like: A += B had both A and B virtual registers 
spilled, A was loaded from its stack location twice. This fixes the bug.

llvm-svn: 11093
 2004-02-03 01:13:07 +00:00
Alkis Evlogimenos
74b26f77a3 Revert changes. Will implement this using a different set of primitives 
llvm-svn: 11091
 2004-02-02 23:08:58 +00:00
Alkis Evlogimenos
6e34205653 Fix debugging output. 
llvm-svn: 11088
 2004-02-02 22:00:32 +00:00
Alkis Evlogimenos
6471e66fbb Correctly update def/use information for modified machine operands. 
llvm-svn: 11087
 2004-02-02 21:56:40 +00:00
Alkis Evlogimenos
86ff30deab Should be more careful. The previously applied change made all counts 
outside of loops = 0.

llvm-svn: 11085
 2004-02-02 20:29:57 +00:00
Alkis Evlogimenos
2cecace9b2 Create an object for tracking physical register usage. This will look 
much better when I get rid of the reserved registers.

llvm-svn: 11066
 2004-02-02 07:30:36 +00:00
Alkis Evlogimenos
9b9c0485fd Change weight array into a vector and make it as big as the number of 
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.

llvm-svn: 11061
 2004-02-01 20:13:26 +00:00
Alkis Evlogimenos
5e05a59bf8 Use std::map::count() instead of std::map::find() != std::map::end() 
where appropriate.

llvm-svn: 11060
 2004-02-01 18:39:53 +00:00
Alkis Evlogimenos
a3a56fa041 Change string for joined intervals. 
llvm-svn: 11057
 2004-02-01 16:13:05 +00:00
Alkis Evlogimenos
84a84c38b7 Change xor to ^. 
llvm-svn: 11054
 2004-02-01 08:19:25 +00:00
Chris Lattner
cae054f59f Fix a bug in a recent checkin 
llvm-svn: 11050
 2004-02-01 05:25:07 +00:00
Alkis Evlogimenos
8d4f06ed84 Missed one silly assert :-) 
llvm-svn: 11048
 2004-02-01 02:21:31 +00:00
Alkis Evlogimenos
69deb4d236 Simplify joinIntervals() code. 
llvm-svn: 11047
 2004-02-01 02:18:31 +00:00
Alkis Evlogimenos
91dcc03c39 Use MRegisterInfo::isPhysicalRegister and 
MRegisterInfo::isVirtualRegister.

llvm-svn: 11045
 2004-02-01 01:27:01 +00:00
Alkis Evlogimenos
662bb3f495 Apply final part of Chris' patch. 
llvm-svn: 11040
 2004-01-31 23:48:47 +00:00
Alkis Evlogimenos
459a67c309 Be a little smarter on the way we handle physical register defs. 
llvm-svn: 11038
 2004-01-31 23:13:30 +00:00
Chris Lattner
c330b98c1c Finegrainify namespacification, use new MRegisterInfo::isVirtualRegister 
method

llvm-svn: 11037
 2004-01-31 21:27:19 +00:00
Chris Lattner
a2ef296994 Fix, correctly this time, the computation of the return value 
Fix a spello
Tighten up the assertion checking

No functionality changes.

llvm-svn: 11036
 2004-01-31 21:21:43 +00:00
Chris Lattner
626f431165 * Fix incorrect computation of the runOnMachineFunction return value 
* Turn a bunch of instance variables into automatic variables

llvm-svn: 11035
 2004-01-31 21:14:04 +00:00
Chris Lattner
d835aa6711 Remove unneeded #includes 
Move Passes.h (which defines the interface to this file) to the top.
Move statistics to the top of the file.
Add a comment

llvm-svn: 11034
 2004-01-31 21:07:15 +00:00
Alkis Evlogimenos
50d97e33b7 Merge safe parts from last night's buggy commit. These do not break 
any test cases :-)

llvm-svn: 11032
 2004-01-31 19:59:32 +00:00
Alkis Evlogimenos
cdf48ab294 Optimize liveAt() and overlaps(). We now use a binary search instead 
of a linear search to find the first range for comparisons. This cuts
down the linear scan register allocator running time by a factor of 3
in 254.perlbmk and by a factor of 2.2 in 176.gcc.

llvm-svn: 11030
 2004-01-31 16:54:54 +00:00
Alkis Evlogimenos
26665e2636 Revert last night's changes as they broke some tests. Will remerge parts of the patch. 
llvm-svn: 11029
 2004-01-31 14:37:41 +00:00
Alkis Evlogimenos
f2fb0fb486 Several performance enhancements and cleanups from Chris. 
Simplification of LiveIntervals::Interval::overlaps() and addition of
examples to overlaps() and liveAt() to make them clearer.

llvm-svn: 11028
 2004-01-31 04:56:07 +00:00
Chris Lattner
0770862334 Finegrainify namespacification 
Implement LiveVariables::getIndexMachineBasicBlock

llvm-svn: 11018
 2004-01-30 22:08:53 +00:00
Brian Gaeke
845c0dd196 Give clients of MachineFunctionPrinter the ability to specify a banner and 
choose an ostream.

llvm-svn: 11016
 2004-01-30 21:53:46 +00:00
Alkis Evlogimenos
59e3325c26 Fix failing test cases with joined live intervals. It turns out that 
when joining we need to check if we overlap with the second interval
or any of its aliases.

Also make joining intervals the default.

llvm-svn: 10973
 2004-01-23 13:37:51 +00:00
Alkis Evlogimenos
73df113676 Add option to join live intervals. Two intervals are joined if there 
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.

llvm-svn: 10965
 2004-01-22 23:08:45 +00:00
Alkis Evlogimenos
e1c24c06f9 Remove unneeded check. An interval in active, by definition overlaps 
with the current one.

llvm-svn: 10959
 2004-01-22 20:07:18 +00:00
Alkis Evlogimenos
4716d76d22 Improve debugging output. Remove unneeded virtReg->0 mapping when 
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.

llvm-svn: 10958
 2004-01-22 19:24:43 +00:00
Alkis Evlogimenos
19638ab2bd Revert previous change. The code was correct... 
llvm-svn: 10957
 2004-01-22 19:17:52 +00:00
Alkis Evlogimenos
0aa9d0278d Fix incorrect negatives in LiveIntervals::Interval::liveAt(). 
llvm-svn: 10956
 2004-01-22 18:33:50 +00:00
Tanya Lattner
7117b9751d Moved iterators around. 
llvm-svn: 10926
 2004-01-20 17:51:13 +00:00
Tanya Lattner
72494e04be Moved iterators to common file. 
llvm-svn: 10925
 2004-01-20 17:49:42 +00:00
Alkis Evlogimenos
d844972574 Handle printing of intervals that are not assign to any physical 
register yet (2nd try).

llvm-svn: 10896
 2004-01-16 20:33:13 +00:00