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3543 Commits

Author SHA1 Message Date
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
Alkis Evlogimenos
8672af1cc8 Handle printing of intervals that are not assign to any physical 
register yet.

llvm-svn: 10895
 2004-01-16 20:29:42 +00:00
Alkis Evlogimenos
d86933d21d Fold open interval ends handling into 
LiveIntervals::Interval::expiredAt() and simplify regalloc code.

llvm-svn: 10894
 2004-01-16 20:17:05 +00:00
Alkis Evlogimenos
e9c6ba891e Add asserts to previous change. 
llvm-svn: 10893
 2004-01-16 16:23:23 +00:00
Alkis Evlogimenos
3010b3e38e Use a list instead of a vector to store intervals. This will be needed 
when we join intervals and one of the two will need to be removed.

llvm-svn: 10892
 2004-01-16 16:06:59 +00:00
Alkis Evlogimenos
0680572553 Properly update #intervals statistic. 
llvm-svn: 10847
 2004-01-14 10:44:29 +00:00
Alkis Evlogimenos
2615c98042 Fix bug in LiveIntervals::Interval::overlaps and 
LiveIntervals::Interval::liveAt. Both were considering the live ranges
closed in the end, when they are actually open.

llvm-svn: 10835
 2004-01-14 00:20:09 +00:00
Alkis Evlogimenos
a0865cec3f Improve debugging output. 
llvm-svn: 10834
 2004-01-14 00:09:36 +00:00
Alkis Evlogimenos
0431621429 Fix miscomputation of live intervals. The catch is that registers can 
be dead at the defining instruction but can only be killed in
subsequent ones.

llvm-svn: 10833
 2004-01-13 22:26:14 +00:00
Alkis Evlogimenos
1a01c80f1b Remove allocatable registers vector. It is already provided by 
LiveVariables.

llvm-svn: 10830
 2004-01-13 22:10:43 +00:00
Alkis Evlogimenos
13e8623a3f Cleanup debugging output. 
llvm-svn: 10824
 2004-01-13 21:53:20 +00:00
Alkis Evlogimenos
33f9cb1da7 Fix output of live intervals to show correctly its closed, open 
ranges, i.e. [a,b)

llvm-svn: 10822
 2004-01-13 21:17:47 +00:00
Alkis Evlogimenos
9d0c3d21c8 Remove unneeded check (with the recent change in live variables a use 
of a physical register is always dominated by a def).

llvm-svn: 10821
 2004-01-13 21:16:25 +00:00
Alkis Evlogimenos
65bc990bda Indentation and whitespace cleanups. 
llvm-svn: 10820
 2004-01-13 20:42:08 +00:00
Alkis Evlogimenos
6b1ec75da9 Fix bug introduced by previous commit: check if fixed intervals 
overlap before adding their spill weight.

llvm-svn: 10819
 2004-01-13 20:37:01 +00:00
Alkis Evlogimenos
ebbd66c042 Correctly compute live variable information for physical registers 
when an implicitely defined register is later used by an alias. For example:

         call foo
         %reg1024 = mov %AL

The call implicitely defines EAX but only AL is used. Before this fix
no information was available on AL. Now EAX and all its aliases except
AL get defined and die at the call instruction whereas AL lives to be
killed by the assignment.

llvm-svn: 10813
 2004-01-13 06:24:30 +00:00
Alkis Evlogimenos
52a714b45b Make LiveVariables::HandlePhysRegUse and 
LiveVariables::HandlePhysRegDef private they use information that is
not in memory when LiveVariables finishes the analysis.

Also update the TwoAddressInstructionPass to not use this interface.

llvm-svn: 10755
 2004-01-11 09:18:45 +00:00
Chris Lattner
8043f8c294 Remove use of llvm/CodeGen/InstrSelection.h 
llvm-svn: 10749
 2004-01-10 19:16:26 +00:00
Chris Lattner
a4ee66f3ea Finegrainify namespacification. 
This should get hunked over to the Sparc backend, along with
MachineCodeForInstruction and a bunch of files in include/llvm/Codegen,
but those battles will have to wait for a later time.

llvm-svn: 10731
 2004-01-09 06:30:18 +00:00
Chris Lattner
83e84166a3 Move InstrSelection into lib/Target/Sparc, as it's sparc specific 
llvm-svn: 10730
 2004-01-09 06:24:06 +00:00
Chris Lattner
b9c7999881 Move lib/Codegen/RegAlloc into lib/Target/Sparc, as it is sparc specific 
llvm-svn: 10728
 2004-01-09 06:17:12 +00:00
Alkis Evlogimenos
ae5b3d4f74 Add a separate list of fixed intervals. This improves the running time 
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% :-)

llvm-svn: 10712
 2004-01-07 09:20:58 +00:00
Alkis Evlogimenos
a64d71203e Minor cleanups. 
llvm-svn: 10711
 2004-01-07 05:31:12 +00:00