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1069 Commits

Author SHA1 Message Date
Chris Lattner
ef375052c6 Rename the opCode instance variable to Opcode 
llvm-svn: 11348
 2004-02-12 16:09:53 +00:00
Chris Lattner
bda81f88b7 This field is never read 
llvm-svn: 11346
 2004-02-12 16:04:49 +00:00
Alkis Evlogimenos
b755d35fd2 Change MachineBasicBlock's vector of MachineInstr pointers into an 
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.

llvm-svn: 11340
 2004-02-12 02:27:10 +00:00
Brian Gaeke
4d67c9770d getOpCode() --> getOpcode(). 
llvm-svn: 11339
 2004-02-12 01:34:05 +00:00
Chris Lattner
db2c8941a5 Add #include 
llvm-svn: 11285
 2004-02-10 21:18:55 +00:00
Chris Lattner
37e040ee03 Do not use MachineOperand::isVirtualRegister either! 
llvm-svn: 11283
 2004-02-10 21:12:22 +00:00
Chris Lattner
9d0a4e63b1 Eliminate users of MachineOperand::isPhysicalRegister 
llvm-svn: 11278
 2004-02-10 20:41:10 +00:00
Brian Gaeke
c86ce8b134 Move InstrSchedule's iterator begin/end methods inline. 
llvm-svn: 11239
 2004-02-09 18:42:46 +00:00
Brian Gaeke
60268b265f 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
95c21b04da 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
9fb6056f1f 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
b665065e6d 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
c49e77cecd 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
59bb9d69c7 Increase code clarity. 
llvm-svn: 11151
 2004-02-06 18:08:18 +00:00
Alkis Evlogimenos
2aa7703205 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
f01a26ceaa 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
3dd0f57349 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
0221566368 Added missing include. 
llvm-svn: 11129
 2004-02-05 05:04:39 +00:00
Alkis Evlogimenos
676e5b8997 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
5e78d4bd75 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
e128cb3295 Revert changes. Will implement this using a different set of primitives 
llvm-svn: 11091
 2004-02-02 23:08:58 +00:00
Alkis Evlogimenos
a4fab12df8 Fix debugging output. 
llvm-svn: 11088
 2004-02-02 22:00:32 +00:00
Alkis Evlogimenos
3f268a9996 Correctly update def/use information for modified machine operands. 
llvm-svn: 11087
 2004-02-02 21:56:40 +00:00
Alkis Evlogimenos
dfef24298e 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
1825f30a3a 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
586dc51262 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
b2ea4389ca 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
eabb1b1bfa Change string for joined intervals. 
llvm-svn: 11057
 2004-02-01 16:13:05 +00:00
Alkis Evlogimenos
e9d1aa31fc Change xor to ^. 
llvm-svn: 11054
 2004-02-01 08:19:25 +00:00
Chris Lattner
2e497b5e42 Fix a bug in a recent checkin 
llvm-svn: 11050
 2004-02-01 05:25:07 +00:00
Alkis Evlogimenos
107cf3892c Missed one silly assert :-) 
llvm-svn: 11048
 2004-02-01 02:21:31 +00:00
Alkis Evlogimenos
a7459c76aa Simplify joinIntervals() code. 
llvm-svn: 11047
 2004-02-01 02:18:31 +00:00
Alkis Evlogimenos
612a35f2a4 Use MRegisterInfo::isPhysicalRegister and 
MRegisterInfo::isVirtualRegister.

llvm-svn: 11045
 2004-02-01 01:27:01 +00:00
Alkis Evlogimenos
9559cebebf Apply final part of Chris' patch. 
llvm-svn: 11040
 2004-01-31 23:48:47 +00:00
Alkis Evlogimenos
656870703f 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
0ea56952d4 Finegrainify namespacification, use new MRegisterInfo::isVirtualRegister 
method

llvm-svn: 11037
 2004-01-31 21:27:19 +00:00
Chris Lattner
bff56dc518 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
05b7fef02f * 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
b0addcc1b0 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
d1ec5f36ee 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
ef63827238 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
b9df133d67 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
c0db519832 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
32ec75c4ef Finegrainify namespacification 
Implement LiveVariables::getIndexMachineBasicBlock

llvm-svn: 11018
 2004-01-30 22:08:53 +00:00
Brian Gaeke
9cf840250b 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
2a8df1739b 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
b4745bda05 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
8d8c76a064 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
abdbf4a288 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
a1bb8618c3 Revert previous change. The code was correct... 
llvm-svn: 10957
 2004-01-22 19:17:52 +00:00
Alkis Evlogimenos
448e6f3353 Fix incorrect negatives in LiveIntervals::Interval::liveAt(). 
llvm-svn: 10956
 2004-01-22 18:33:50 +00:00
Tanya Lattner
291f28ee4e Moved iterators around. 
llvm-svn: 10926
 2004-01-20 17:51:13 +00:00
Tanya Lattner
33079fad04 Moved iterators to common file. 
llvm-svn: 10925
 2004-01-20 17:49:42 +00:00
Alkis Evlogimenos
7f300c9ea6 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
e03ef29452 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
38f0f867b3 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
ed3c0a91b0 Add asserts to previous change. 
llvm-svn: 10893
 2004-01-16 16:23:23 +00:00
Alkis Evlogimenos
61db3621bd 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
52d1db4841 Properly update #intervals statistic. 
llvm-svn: 10847
 2004-01-14 10:44:29 +00:00
Alkis Evlogimenos
c4225e2f09 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
9a9f749eec Improve debugging output. 
llvm-svn: 10834
 2004-01-14 00:09:36 +00:00
Alkis Evlogimenos
34a4e7b161 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
c73c31a496 Remove allocatable registers vector. It is already provided by 
LiveVariables.

llvm-svn: 10830
 2004-01-13 22:10:43 +00:00
Alkis Evlogimenos
e1afcec06f Cleanup debugging output. 
llvm-svn: 10824
 2004-01-13 21:53:20 +00:00
Alkis Evlogimenos
a2965727e3 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
060861d7eb 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
7ffa2a50f3 Indentation and whitespace cleanups. 
llvm-svn: 10820
 2004-01-13 20:42:08 +00:00
Alkis Evlogimenos
767111188a 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
1a7b3c80d7 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
ef7c077e63 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
4771545c89 Remove use of llvm/CodeGen/InstrSelection.h 
llvm-svn: 10749
 2004-01-10 19:16:26 +00:00
Chris Lattner
1eeb1b1c04 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
ebe5eeb151 Move InstrSelection into lib/Target/Sparc, as it's sparc specific 
llvm-svn: 10730
 2004-01-09 06:24:06 +00:00
Chris Lattner
9bd7a783b9 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
cbe72d0381 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
7bba96c90b Minor cleanups. 
llvm-svn: 10711
 2004-01-07 05:31:12 +00:00
Alkis Evlogimenos
752173bede Remove declared but undefined method. 
llvm-svn: 10710
 2004-01-07 02:29:33 +00:00
Alkis Evlogimenos
8aea74016b Change implementation of LiveIntervals::overlap(). This results in a 
30-50% decrease in running time of the linear scan register allocator.

llvm-svn: 10707
 2004-01-07 01:45:58 +00:00
Alkis Evlogimenos
63f378bb39 Remove simple coalescing. 
llvm-svn: 10695
 2004-01-05 08:24:57 +00:00
Chris Lattner
bd827343af fix warning 
llvm-svn: 10692
 2004-01-05 05:42:17 +00:00
Alkis Evlogimenos
496be157cc Currently we cannot handle two-address instructions of the form: 
A = B op C where A == C, but this cannot really occur in practice
because of SSA form. Add an assert to check that just to be safe.

llvm-svn: 10682
 2004-01-05 02:25:45 +00:00
Alkis Evlogimenos
e74dd531f7 Update description. 
llvm-svn: 10681
 2004-01-04 23:09:24 +00:00
Chris Lattner
c37577eb9f Clean up a lot of the code I added yesterday by exposing the IntrinsicLowering 
implementation from the TargetMachine directly.

llvm-svn: 10636
 2003-12-28 21:23:38 +00:00
Alkis Evlogimenos
8157eb7140 Reserve ECX and EDI instead of EBX and EDI. Since EBX is a callee 
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.

llvm-svn: 10635
 2003-12-28 18:03:52 +00:00
Alkis Evlogimenos
fc01aac4d8 Add coalescing to register allocator. A hint is added to each interval 
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.

llvm-svn: 10634
 2003-12-28 17:58:18 +00:00
Chris Lattner
c487970d6b Whoops, don't try to lower non intrinsic calls 
llvm-svn: 10632
 2003-12-28 09:53:23 +00:00
Chris Lattner
66fb20d2d3 Use the intrinsic lowering functionality 
llvm-svn: 10626
 2003-12-28 09:43:35 +00:00
Chris Lattner
068ac4236d Move into the VMCore library 
llvm-svn: 10623
 2003-12-28 08:30:20 +00:00
Chris Lattner
57ff7c242c Implement the default implementation of the intrinsic lowering class 
llvm-svn: 10621
 2003-12-28 08:19:41 +00:00
Chris Lattner
a8c942c188 finegrainify namespacification 
minor cleanups

llvm-svn: 10619
 2003-12-28 07:59:53 +00:00
Alkis Evlogimenos
597e2f3501 Improve debugging output when choosing a register to spill. 
llvm-svn: 10604
 2003-12-24 18:53:31 +00:00
Alkis Evlogimenos
2c947a4fa0 Do a separate pass to compute spill weights because doing it inline 
with live intervals was missing registers that were used before they
were defined (in the arbitrary order live intervals numbers
instructions).

llvm-svn: 10603
 2003-12-24 15:44:53 +00:00
Alkis Evlogimenos
ca57dd1089 Change the way free regusters are computed and perform better 
allocation in the presence of preallocated intervals.

llvm-svn: 10595
 2003-12-23 18:00:33 +00:00
Alkis Evlogimenos
10de430568 Fix crash when compiling twolf. 
llvm-svn: 10584
 2003-12-22 13:54:29 +00:00
Alkis Evlogimenos
7062ccbc85 Remove verifyIntervals() since it doesn't actually work right now. 
llvm-svn: 10570
 2003-12-21 20:41:26 +00:00
Alkis Evlogimenos
4401d0a7a3 Change weight into a float so that we can take into account the 
nesting level when computing it. Right now the allocator uses:

    w = sum_over_defs_uses( 10 ^ nesting level );

llvm-svn: 10569
 2003-12-21 20:19:10 +00:00
Alkis Evlogimenos
4f98b79ef0 Add support for inactive intervals. This effectively reuses registers 
for live ranges that fall into assigned registers' holes.

llvm-svn: 10566
 2003-12-21 05:43:40 +00:00
Chris Lattner
461a62626a Add a new target-independent machine code freeing pass 
llvm-svn: 10560
 2003-12-20 10:20:58 +00:00
Chris Lattner
d476049d19 * Finegrainify namespacification 
* Move sparc specific code out of generic code
* Eliminate the getOffset() method which made INVALID_FRAME_OFFSET
  necessary, which made pulling in MAX_INT as a sentinal necessary.

llvm-svn: 10553
 2003-12-20 09:17:07 +00:00
Alkis Evlogimenos
9181e0ab5b Remove TwoAddressInstruction from the public headers and add an ID 
instead, since this pass doesn't expose any state to its users.

llvm-svn: 10520
 2003-12-18 22:40:24 +00:00
Chris Lattner
c984af2771 Prune some #includes 
Add a statistic for # reloads

llvm-svn: 10518
 2003-12-18 20:25:31 +00:00
Alkis Evlogimenos
f6e9dd4942 Modify linear scan register allocator to use the two-address 
instruction pass. This also fixes all remaining bugs for this new
allocator to pass all tests under test/Programs.

llvm-svn: 10515
 2003-12-18 13:15:02 +00:00
Alkis Evlogimenos
9bb0ad1a37 Fix bug in reserved registers. DH actually aliases DX and EDX which 
are not reserved registers.

llvm-svn: 10514
 2003-12-18 13:12:18 +00:00
Alkis Evlogimenos
48d20cb328 Modify local register allocator to use the two-address instruction pass. 
llvm-svn: 10513
 2003-12-18 13:08:52 +00:00
Alkis Evlogimenos
90aeecae42 Add TwoAddressInstructionPass to handle instructions that have two or 
more operands and the two first operands are constrained to be the
same. The pass takes an instruction of the form:

        a = b op c

and transforms it into:

        a = b
        a = a op c

and also preserves live variables.

llvm-svn: 10512
 2003-12-18 13:06:04 +00:00
Alkis Evlogimenos
befef566f6 Rename LiveIntervals::expired() to LiveIntervals::expiredAt(). 
llvm-svn: 10511
 2003-12-18 08:56:11 +00:00
Alkis Evlogimenos
382bfbffeb When a variable is killed and redifined in a basic block only one 
killing instruction is tracked. This causes the LiveIntervals to
create bogus intervals. The workaound is to add a range to the
interval from the redefinition to the end of the basic block.

llvm-svn: 10510
 2003-12-18 08:53:43 +00:00
Alkis Evlogimenos
8e2fcc7d79 Handle multiple virtual register definitions gracefully. 
Move some of the longer LiveIntervals::Interval method out of the
header and add debug information to them. Fix bug and simplify range
merging code.

llvm-svn: 10509
 2003-12-18 08:48:48 +00:00
Alkis Evlogimenos
657eb40294 Change preserve all claim to just preserve live variables and phielimination. 
llvm-svn: 10469
 2003-12-15 04:55:38 +00:00
Alkis Evlogimenos
29127b8825 Change interface of MachineOperand as follows: 
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.

llvm-svn: 10461
 2003-12-14 13:24:17 +00:00
Alkis Evlogimenos
d58f58b351 When reserving a preallocated register spill the aliases of this 
register too.

llvm-svn: 10450
 2003-12-13 11:58:10 +00:00
Alkis Evlogimenos
f84f86137b Ignore non-allocatable physical registers in live interval analysis. 
llvm-svn: 10449
 2003-12-13 11:11:02 +00:00
Alkis Evlogimenos
18bf6b5ad7 Expire any active intervals left when register allocation is done. 
llvm-svn: 10448
 2003-12-13 05:50:19 +00:00
Alkis Evlogimenos
225fc9c6db Add instruction numbers to debugging output. 
llvm-svn: 10447
 2003-12-13 05:48:57 +00:00
Alkis Evlogimenos
2a41fcbef3 Handle explicit physical register defs. 
llvm-svn: 10445
 2003-12-13 05:26:39 +00:00
Alkis Evlogimenos
6e511754e5 Remove unecessary if statements when looping on ImplicitDefs. 
llvm-svn: 10444
 2003-12-13 01:20:58 +00:00
John Criswell
ea48d9cd13 This appears to fix Bug 172 and does not break any other feature tests or 
regression tests.

llvm-svn: 10388
 2003-12-10 22:51:41 +00:00
Alkis Evlogimenos
f3373f7bc9 Make assertion stricter. Since the source operands are allocated at 
this point, the second operand must be a physical register (it cannot
be a virtual one).

llvm-svn: 10292
 2003-12-05 11:31:39 +00:00
Alkis Evlogimenos
711ebbdd57 Fix bug in register spilling when a preallocated live range overlaps a 
potential register assignment.

llvm-svn: 10291
 2003-12-05 11:17:55 +00:00
Alkis Evlogimenos
229c2b9181 Move operator<<(std::ostream&, const LiveInterval&) out of the header file. 
llvm-svn: 10290
 2003-12-05 10:38:28 +00:00
Alkis Evlogimenos
52ec591c66 Sort live intervals by increasing start point. 
llvm-svn: 10289
 2003-12-05 10:32:01 +00:00
Alkis Evlogimenos
6f8151e202 Improve debugging output and clean up some code. 
llvm-svn: 10288
 2003-12-04 03:57:28 +00:00
Alkis Evlogimenos
c1409f46b6 Print instructions before register allocation is performed. Also fix 
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.

llvm-svn: 10272
 2003-11-30 23:40:39 +00:00
Alkis Evlogimenos
36630268ae Remove "numReloaded" statistic. 
llvm-svn: 10268
 2003-11-30 05:15:36 +00:00
Alkis Evlogimenos
6627a32ff9 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. 
llvm-svn: 10103
 2003-11-20 03:32:25 +00:00
Brian Gaeke
d25f86d683 Put all LLVM code into the llvm namespace, as per bug 109. 
llvm-svn: 9903
 2003-11-11 22:41:34 +00:00
Brian Gaeke
612254327c Fix problems linking against the reoptimizer; _llvm_regAllocState must have 
externally-visible linkage, and SaveStateToModule must default to true for llc.
I don't remember why I made it const; perhaps it should be deconstified.

llvm-svn: 9858
 2003-11-10 07:12:01 +00:00
Brian Gaeke
490bf81152 Operand numbers are now ints. Save the register allocation of the value 
each instruction produces as "operand" -1, and the other operands as 0
.. n, as before. PhyRegAlloc::saveState() is refactored into
PhyRegAlloc::saveStateForValue().

llvm-svn: 9842
 2003-11-10 00:05:26 +00:00
Misha Brukman
6667a74caf Let's not forget about our friends -- Constant Pool indices. 
llvm-svn: 9750
 2003-11-06 00:04:11 +00:00
Chris Lattner
1370c57a42 Do not use a class before it is defined. 
Be gcc 3.4 clean

llvm-svn: 9727
 2003-11-05 06:25:06 +00:00
Brian Gaeke
8dadbe31dc Update verifySavedState()'s comment, so that it reflects its current 
status.  In doFinalization(), skip over external functions, just like
Anand's mapping info does.

llvm-svn: 9703
 2003-11-04 22:42:41 +00:00
Brian Gaeke
f641ebe313 Add comments. 
llvm-svn: 9697
 2003-11-04 18:25:56 +00:00
Brian Gaeke
29d56dd004 Include llvm/CodeGen/MachineCodeForInstruction.h. Use it to start 
implementing verifySavedState().

In saveState(), use the new AllocInfo::AllocStateTy enum, and increment
Insn each time through the loop.

llvm-svn: 9617
 2003-10-30 21:21:33 +00:00
Brian Gaeke
e78feb1c40 Make AllocState an enum. 
Move the stringifying method for that enum into class AllocInfo.

llvm-svn: 9616
 2003-10-30 21:21:22 +00:00
Brian Gaeke
04e6824a3f Publicize the type of FnAllocState. 
Prototype option to save state in a global instead of as a Constant in
 the Module. (Turned off, for now, with the on/off switch welded in the off
 position. You get the idea.)

llvm-svn: 9500
 2003-10-24 21:21:58 +00:00
Chris Lattner
d09d070385 standardize command line option names 
llvm-svn: 9496
 2003-10-24 20:05:58 +00:00
Brian Gaeke
665123fb99 Move the implementations of ==, != on AllocInfos here, from UnpackTraceFunction. 
llvm-svn: 9452
 2003-10-23 20:39:18 +00:00
Brian Gaeke
6d9f7ff0df Move AllocInfo structure to a private AllocInfo.h header file. 
Make FnAllocState contain vectors of AllocInfo, instead of LLVM Constants.
Give doFinalization a method comment, and let it do the work of converting
 AllocInfos to LLVM Constants.

llvm-svn: 9451
 2003-10-23 20:32:55 +00:00
Brian Gaeke
98fbdd344e Make FnAllocState contain vectors of AllocInfo, instead of LLVM Constants. 
llvm-svn: 9450
 2003-10-23 20:32:02 +00:00
Brian Gaeke
ede0b08125 New file, containing AllocInfo structure. 
llvm-svn: 9449
 2003-10-23 20:31:51 +00:00
Misha Brukman
966d423f89 * Eliminate `using' directive 
* Fix order of #includes
* Make code layout more consistent
* Eliminate extraneous whitespace and comment-lines

llvm-svn: 9433
 2003-10-23 18:10:02 +00:00
Misha Brukman
97911fb3bb * Fix order of #include files 
* Doxygen-ify method comments

llvm-svn: 9432
 2003-10-23 18:06:27 +00:00
Misha Brukman
c1b01b50fb * Order #includes as per style guide 
* Doxygen-ify comments
* Make code layout more consistent

llvm-svn: 9431
 2003-10-23 18:03:50 +00:00
Misha Brukman
765938c377 * Use C++ style comments instead of C-style 
* Make file description more readable
* Make code layout more consistent, include comment in assert so it's visible
  during execution if it hits

llvm-svn: 9430
 2003-10-23 18:02:47 +00:00
Misha Brukman
2c119cec9b * Eliminate `using' directive 
* Make code layout more consistent

llvm-svn: 9427
 2003-10-23 17:43:17 +00:00
Misha Brukman
22e5a5848b Make code layout more consistent. 
llvm-svn: 9426
 2003-10-23 17:39:37 +00:00
Brian Gaeke
916b2522f9 Change the type of FnAllocState. 
llvm-svn: 9388
 2003-10-22 20:44:29 +00:00
Brian Gaeke
5952eddbfb Don't worry about converting each function's reg. alloc. state into One Big 
Constant early on, because we can do it in doFinalization.

Tighten up a comment.

llvm-svn: 9387
 2003-10-22 20:44:23 +00:00
Brian Gaeke
4e1aade603 Add prototype for verifySavedState(). 
llvm-svn: 9386
 2003-10-22 20:23:13 +00:00
Brian Gaeke
08fc8bcce4 Doxygenify method comments. 
Try to improve method comments a little.
Get rid of some excess whitespace; put braces on previous line when possible.
Add stub for method to verify the work of saveState().

llvm-svn: 9385
 2003-10-22 20:22:53 +00:00
John Criswell
4746befea3 Added LLVM copyright notice. 
llvm-svn: 9324
 2003-10-21 15:29:18 +00:00
John Criswell
de34542f41 Added LLVM copyright header. 
llvm-svn: 9321
 2003-10-21 15:17:13 +00:00
John Criswell
71d2894956 Added LLVM copyright notice to Makefiles. 
llvm-svn: 9312
 2003-10-20 22:26:57 +00:00
John Criswell
b402729b30 Added LLVM project notice to the top of every C++ source file. 
Header files will be on the way.

llvm-svn: 9298
 2003-10-20 19:43:21 +00:00
Chris Lattner
87843f87b8 Change the Opcode enum for PHI nodes from "Instruction::PHINode" to "Instruction::PHI" to be more consistent with the other instructions. 
llvm-svn: 9269
 2003-10-19 21:34:28 +00:00
Chris Lattner
eab4a2d0d1 #include vector which we will need here soon 
llvm-svn: 9144
 2003-10-15 22:09:32 +00:00
Chris Lattner
f2ed60c0b7 Decrease usage of use_size() 
llvm-svn: 9135
 2003-10-15 16:48:29 +00:00
Chris Lattner
b6c8569f05 Regularize header file comments 
llvm-svn: 9071
 2003-10-13 03:32:08 +00:00
Misha Brukman
9fcbd8d16f * Doxygenified comments 
* Wrap code at 80 columns
* Ordered includes according to LLVM style guide

llvm-svn: 9020
 2003-10-10 17:41:32 +00:00
Alkis Evlogimenos
74568bc9d4 Change MRegisterDesc::AliasSet, TargetInstrDescriptor::ImplicitDefs 
and TargetInstrDescriptor::ImplicitUses to always point to a null
terminated array and never be null. So there is no need to check for
pointer validity when iterating over those sets. Code that looked
like:

if (const unsigned* AS = TID.ImplicitDefs) {
  for (int i = 0; AS[i]; ++i) {
    // use AS[i]
  }
}

was changed to:

for (const unsigned* AS = TID.ImplicitDefs; *AS; ++AS) {
  // use *AS
}

llvm-svn: 8960
 2003-10-08 05:20:08 +00:00
Alkis Evlogimenos
a37b58ce09 Moved enum and command-line option in separate file. Also added function that returns the user selected register allocator to the caller. 
llvm-svn: 8819
 2003-10-02 16:57:49 +00:00
Chris Lattner
b0860d88c2 include passes.h which defines the interface this file exposes 
llvm-svn: 8793
 2003-09-30 20:13:59 +00:00
Brian Gaeke
8b15e271a5 Update head-of-file comment. 
llvm-svn: 8699
 2003-09-24 18:16:23 +00:00
Brian Gaeke
1c9978c999 Untabify tabs in stuff I've recently added. 
Check in my register allocator state-saving code.

llvm-svn: 8698
 2003-09-24 18:08:54 +00:00
Brian Gaeke
dee6b30348 Use getRegClassID() instead of getRegClass()->getID(), since it's there. 
Shorten the markSuggestedColorUsable method.
Add a switch for saving reg. alloc. state (coming soon).

llvm-svn: 8697
 2003-09-24 17:50:28 +00:00
Brian Gaeke
9ef4c789e3 Remove some unused methods of class IGNode. 
llvm-svn: 8696
 2003-09-24 04:29:52 +00:00
Chris Lattner
afea820122 Move getAnalysisUsage method from header to .cpp file. Add a normal file 
header comment

llvm-svn: 8679
 2003-09-23 15:13:04 +00:00
Brian Gaeke
1fdcd32b79 Use C++ math header instead of C version. 
llvm-svn: 8648
 2003-09-21 03:57:37 +00:00
Brian Gaeke
4013dbc6b0 Erase now-unused prototypes. 
llvm-svn: 8647
 2003-09-21 02:51:00 +00:00
Brian Gaeke
0478925a82 Rearrange #includes ... since there are fewer now I guess it's a win. 
(I also zapped printMachineCode() and printLabel() at the previous checkin,
but forgot to mention it.)

llvm-svn: 8646
 2003-09-21 02:50:21 +00:00
Brian Gaeke
605ed35234 Standardize the names of include guards. 
llvm-svn: 8645
 2003-09-21 02:31:37 +00:00
Brian Gaeke
84114e1b72 Standardize the names of include guards. 
Remove more excess whitespace.

llvm-svn: 8644
 2003-09-21 02:31:25 +00:00
Brian Gaeke
92f4b04f66 Standardize the names of include guards. 
Fix typos in file header comment.

llvm-svn: 8643
 2003-09-21 02:31:15 +00:00
Brian Gaeke
4f86f6e887 I tried to standardize the formatting and tidy up the huge amount of 
excess whitespace a little. Also improved some comments.

llvm-svn: 8642
 2003-09-21 02:24:09 +00:00
Brian Gaeke
6dc46fce5a Convert PhyRegAlloc into a proper pass. 
PhyRegAlloc.cpp:
 Don't include TargetMachine.h or TargetRegInfo.h, because these are provided
  by PhyRegAlloc.h.
 Merge class RegisterAllocator into class PhyRegAlloc.
 Simplify & move ctor, dtor to PhyRegAlloc.h.
 Make some of PhyRegAlloc's reference members into pointer members,
  so they can be more easily messed with.
 MarkAllocatedRegs() becomes a member method, with fewer args.

PhyRegAlloc.h:
 Include Pass.h, TargetMachine.h and TargetRegInfo.h. Don't declare
  TargetRegInfo forward.
 Give AddedInstrns the obvious clear() method.
 Make some of PhyRegAlloc's reference members into pointer members,
  so they can be more easily messed with.
 Add prototype for markAllocatedRegs().
 Remove unused inline void constructLiveRanges().

llvm-svn: 8641
 2003-09-21 01:23:46 +00:00
Misha Brukman
9708959677 Fixed spelling. 
llvm-svn: 8588
 2003-09-17 21:34:23 +00:00
Brian Gaeke
d0729bd289 Fix typo in comment. Take out some random whitespace. 
(Partial merge from my working file)

llvm-svn: 8564
 2003-09-16 15:38:05 +00:00
Brian Gaeke
5ef624ead8 Edit comment for accuracy 
llvm-svn: 8562
 2003-09-16 15:36:50 +00:00
Vikram S. Adve
724b2d6f36 Add flag to control whether or not delay slots are filled during 
instruction scheduling (this is off by default).

llvm-svn: 8553
 2003-09-16 05:55:15 +00:00
Brian Gaeke
d7bc2c066d Fix typos in comments. 
llvm-svn: 8523
 2003-09-15 05:28:42 +00:00
Misha Brukman
629711a7c3 Fixed spelling and grammar. 
llvm-svn: 8489
 2003-09-11 22:34:13 +00:00
Chris Lattner
5520e4dc30 Don't build dead directories 
llvm-svn: 8308
 2003-09-01 20:34:15 +00:00
Chris Lattner
a685c382b1 Remove dead library makefile 
llvm-svn: 8304
 2003-09-01 20:29:43 +00:00
Chris Lattner
80c84d29b1 Remove makefile for dead library 
llvm-svn: 8303
 2003-09-01 20:26:52 +00:00
Chris Lattner
049f0b8b37 LiveRange.h is now in lib/CodeGen/RegAlloc 
llvm-svn: 8299
 2003-09-01 20:17:13 +00:00
Chris Lattner
74e93a318b LiveRangeInfo got moved into the lib/CodeGen/RegAlloc directory 
llvm-svn: 8297
 2003-09-01 20:12:17 +00:00
Chris Lattner
a591134169 PhyRegAlloc.h got moved to lib/CodeGen/RegAlloc 
llvm-svn: 8296
 2003-09-01 20:09:04 +00:00
Chris Lattner
e3fcb37a20 Move IGNode from public include directory to here. Minor cleanups like adding std:: namespace qualifiers 
llvm-svn: 8295
 2003-09-01 20:05:47 +00:00
John Criswell
588d65ae68 Fixed two double free bugs that caused llc to segfault or run forever. 
llvm-svn: 8191
 2003-08-28 21:43:17 +00:00
Tanya Lattner
7fc76b7377 Removing README 
llvm-svn: 8180
 2003-08-28 17:17:59 +00:00
Tanya Lattner
f7a56c2596 Putting my revised version of ModuloScheduling in cvs. This is not complete... 
llvm-svn: 8179
 2003-08-28 17:12:14 +00:00
Tanya Lattner
7ce05c067d Moved index into BB to common graph class because its needed by ModuloSchedGraph. 
llvm-svn: 8174
 2003-08-28 15:30:40 +00:00
Tanya Lattner
2c6c16288a Added/removed header file 
llvm-svn: 8160
 2003-08-27 15:12:24 +00:00
Tanya Lattner
78d4730ae6 *** empty log message *** 
llvm-svn: 8153
 2003-08-27 02:42:58 +00:00
Tanya Lattner
f172cf418d First version of SchedGraph common class and refactoring of SchedGraph. 
llvm-svn: 8148
 2003-08-25 22:42:20 +00:00
Chris Lattner
82e85c8c5f Fix bug: Jello/2003-08-23-RegisterAllocatePhysReg.ll 
llvm-svn: 8095
 2003-08-23 23:49:42 +00:00
Misha Brukman
cda7f97dbb The word dependent' has no a'. 
llvm-svn: 8030
 2003-08-21 22:14:26 +00:00
Chris Lattner
491f944115 Fix spello 
llvm-svn: 8029
 2003-08-21 22:05:57 +00:00
Misha Brukman
56f7db4178 Spell `necessary' correctly. 
llvm-svn: 7944
 2003-08-18 14:43:39 +00:00
Chris Lattner
972c03e264 Fix bug: Jello/2003-08-15-AllocaAssertion.ll 
llvm-svn: 7916
 2003-08-17 18:01:15 +00:00
Brian Gaeke
797d0f0aeb Fix typo in comment 
llvm-svn: 7906
 2003-08-15 21:19:25 +00:00
Chris Lattner
b2ff3ba7df Remove uses of the NonCopyable class, to make the doxygen output look better 
llvm-svn: 7880
 2003-08-15 05:20:06 +00:00
Chris Lattner
d5ff87cb9b rename selection directory and library to SelectionDAG 
llvm-svn: 7877
 2003-08-15 04:55:22 +00:00
Chris Lattner
d76432ee48 Add a bunch of new node types, etc 
llvm-svn: 7875
 2003-08-15 04:53:16 +00:00
Brian Gaeke
4651096037 Factory methods for function passes now return type FunctionPass *. 
llvm-svn: 7839
 2003-08-14 06:09:32 +00:00
Brian Gaeke
af3bc2b895 Factory methods for function passes now return type FunctionPass *. 
Get rid of RegisterLLC, which can't handle FunctionPasses anyway.

llvm-svn: 7836
 2003-08-14 06:04:49 +00:00
Brian Gaeke
77c65be59e Factory methods for FunctionPasses now return type FunctionPass *. 
llvm-svn: 7823
 2003-08-13 18:18:15 +00:00
Chris Lattner
8b83fcfaa6 Mapping directory no longer exists 
llvm-svn: 7801
 2003-08-13 02:37:24 +00:00
Chris Lattner
c6ea2085bd Obsolete file 
llvm-svn: 7799
 2003-08-13 02:27:13 +00:00
Vikram S. Adve
3862c570bc For instructions in a delay slot of another instruction, 
we no longer need to find the live-before set of the delayed
branch since that set is now included the live-before/after
set of the instructions in each delay slot.  Just assert that instead.

llvm-svn: 7796
 2003-08-12 22:22:24 +00:00
Chris Lattner
f40b9fb6c2 Build the SelectionDAG library 
llvm-svn: 7718
 2003-08-11 14:57:48 +00:00
Chris Lattner
45414456b3 Initial checkin of SelectionDAG implementation. This is still rough and 
unfinished

llvm-svn: 7717
 2003-08-11 14:57:33 +00:00
Vikram S. Adve
bc05294ada Fix assertion in MachineInstr::substituteValue(). 
llvm-svn: 7675
 2003-08-07 15:01:48 +00:00
Chris Lattner
5a778ec126 Use a new local data structure instead of the MachineInstr::regsUsed set 
llvm-svn: 7621
 2003-08-05 22:11:13 +00:00
Chris Lattner
937abf2262 Add a map 
llvm-svn: 7620
 2003-08-05 22:09:31 +00:00
Chris Lattner
a38b57808a Minor cleanups 
llvm-svn: 7619
 2003-08-05 22:03:27 +00:00
Chris Lattner
18b0b92033 Physical registers no longer live in the regsUsed set for each machine instr 
llvm-svn: 7618
 2003-08-05 21:55:58 +00:00
Chris Lattner
a826c8d485 Do not insert physical regsiters into the regsUsed set 
llvm-svn: 7617
 2003-08-05 21:55:20 +00:00
Chris Lattner
b047a0d449 All callers of these methods actually wanted them to preserve the flags, 
so get rid of the def/use parameters that were getting passed in.

**** This now changes the semantics of these methods to preserve the flags,
     not clobber them!

llvm-svn: 7602
 2003-08-05 16:58:46 +00:00
Chris Lattner
297f7d2451 Fix bugs handling ESP in alloca references 
llvm-svn: 7591
 2003-08-05 04:13:58 +00:00
Chris Lattner
6fece1bf61 Revert previous change, and be really anal about what physical registers can do. 
llvm-svn: 7588
 2003-08-05 00:49:09 +00:00
Chris Lattner
0e8197ad06 Don't bother calculating info unless its needed. May reduce number of stack slots created. 
llvm-svn: 7584
 2003-08-04 23:42:37 +00:00
Chris Lattner
8934560bd3 * Fix spelling of 'necessary' 
* Add a lot more DEBUG output, which is better structured than before
* Fix bug: Jello/2003-08-04-PhysRegLiveFailure.llx

llvm-svn: 7583
 2003-08-04 23:36:39 +00:00
Chris Lattner
5dca2ea4bc Simplify code, eliminating the need for the X86 isVoid target instr flag 
llvm-svn: 7534
 2003-08-03 21:51:45 +00:00
Chris Lattner
77691b2c54 Set debug types 
llvm-svn: 7533
 2003-08-03 21:47:31 +00:00
Chris Lattner
eba995d624 Remove using decl 
llvm-svn: 7531
 2003-08-03 20:24:29 +00:00
Chris Lattner
a18bb98cf5 Wrap at 80 columns 
llvm-svn: 7503
 2003-08-03 13:49:03 +00:00
Chris Lattner
1baa706ab7 Move DEBUG to Debug.h 
llvm-svn: 7497
 2003-08-01 22:21:34 +00:00
Vikram S. Adve
1414fba288 All constant-evaluation code now unified into 
TargetInstrInfo::ConvertConstantToIntType().

llvm-svn: 7390
 2003-07-29 19:50:12 +00:00
Vikram S. Adve
b58f52ab45 1. Bug fix: Don't use branch operand reg. as temp. reg. when 
spilling values used by an instruction in the delay slot of the branch
   (which will eventually be moved before the branch).
2. Bug fix:  Delete the delay slot instr, not the branch instr, when
   moving delay slot instr. out!!!!
3. Move code to insert caller-saves moved here from SparcRegInfo:
   it is now machine-independent.

llvm-svn: 7389
 2003-07-29 19:49:21 +00:00
Vikram S. Adve
42005e62b0 Add const version of getLiveRangeForValue(). 
llvm-svn: 7386
 2003-07-29 19:38:22 +00:00
Vikram S. Adve
52859278d1 Code to insert caller-saves moved here from SparcRegInfo: it is now 
machine-independent.
Fix problem with using branch operand reg. as temp. reg. when
spilling values used by an instruction in the delay slot of the branch
(which will eventually be moved before the branch).

llvm-svn: 7385
 2003-07-29 19:37:41 +00:00
Chris Lattner
92dfc1ed32 Making this code const-correct would be a pain, so I'll hack it. 
llvm-svn: 7350
 2003-07-26 23:29:51 +00:00
Chris Lattner
2d6049baaf Const correctness fixes 
llvm-svn: 7349
 2003-07-26 23:24:56 +00:00
Chris Lattner
e39696972d Be const correct 
llvm-svn: 7348
 2003-07-26 23:23:41 +00:00
Chris Lattner
792286a084 Hrm, another necesary one :( 
llvm-svn: 7347
 2003-07-26 23:22:19 +00:00
Chris Lattner
ecc0501a97 Remove #include 
llvm-svn: 7342
 2003-07-26 23:01:04 +00:00
Chris Lattner
9224631d6b Remove extraneous #includes 
llvm-svn: 7341
 2003-07-26 23:00:29 +00:00
Vikram S. Adve
57eb4ab6bc (1) Change the way unused regs. are marked and found to consider regType 
info (since multiple reg types may share the same reg class).
(2) Remove machine-specific regalloc. methods that are no longer needed.
    In particular, arguments and return value from a call do not need
    machine-specific code for allocation.
(3) Rename TargetRegInfo::getRegType variants to avoid unintentional
    overloading when an include file is omitted.

llvm-svn: 7329
 2003-07-25 21:06:09 +00:00
Vikram S. Adve
714fee31fd Remove unused field. Change the way unused regs. are marked and 
found to consider regType info (since multiple reg types may share
the same reg class, e.g., single and double on Sparc).

llvm-svn: 7327
 2003-07-25 21:00:13 +00:00
Chris Lattner
9c569f48a0 Remove unnecessary casts 
llvm-svn: 7250
 2003-07-23 15:17:51 +00:00
Chris Lattner
c1049acba1 Random cleanups 
llvm-svn: 7247
 2003-07-23 14:59:40 +00:00
Chris Lattner
67138b2c59 Remove using decl 
llvm-svn: 7246
 2003-07-23 14:55:59 +00:00
Vikram S. Adve
d8b600cb85 Values stored in CallArgsDescriptor cannot be const. 
llvm-svn: 7156
 2003-07-10 19:46:15 +00:00
Vikram S. Adve
b1496585b6 isMarkedForSpill() should be const. 
llvm-svn: 7155
 2003-07-10 19:45:28 +00:00
Vikram S. Adve
6aa3abf7fa Change interface to MachineInstr::substituteValue to specify more precisely 
which args can be substituted: defsOnly, defsAndUses or usesOnly.

llvm-svn: 7154
 2003-07-10 19:45:07 +00:00
Vikram S. Adve
0b23c58179 Print out all neighbors in interference graph, not just higher-numbered ones. 
llvm-svn: 7153
 2003-07-10 19:43:33 +00:00
Vikram S. Adve
00f3778923 Several fixes to handling of int CC register: 
(1) An int CC live range must be spilled if there are any interferences,
    even if no other "neighbour" in the interf. graph has been allocated
    that reg. yet.  This is actually true of any class with only one reg!

(2) SparcIntCCRegClass::colorIGNode sets the color even if the LR must
    be spilled so that the machine-independent spill code doesn't have to
    make the machine-dependent decision of which CC name to use based on
    operand type: %xcc or %icc.  (These are two halves of the same
register.)

(3) LR->isMarkedForSpill() is no longer the same as LR->hasColor().
    These should never have been the same, and this is necessary now for #2.

(4) All RDCCR and WRCCR instructions are directly generated with the
    phony number for %ccr so that EmitAssembly/EmitBinary doesn't have to
    deal with this.

llvm-svn: 7152
 2003-07-10 19:42:55 +00:00
Vikram S. Adve
d7b18ee501 Choose register instead of immediate for ConstantExpr in ChooseRegOrImmed. 
llvm-svn: 7112
 2003-07-06 20:33:21 +00:00
Vikram S. Adve
293af7edb6 Minor beautification: fold a couple of lines of code. 
llvm-svn: 7054
 2003-07-02 01:24:00 +00:00