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1200 Commits

Author SHA1 Message Date
Tanya Lattner
b5159ed0cb Fixed up my changes to add support for cloning Machine Instructions. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@13665 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-05-23 20:58:02 +00:00
Tanya Lattner
466b534a57 Adding support to clone MachineInstr 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@13661 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-05-23 19:35:12 +00:00
Chris Lattner
bee887211b Fix a really nasty bug from my changes on Monday to PHIElim. These changes 
broke obsequi and a lot of other things.  It all boiled down to MBB being
overloaded in an inner scope and me confusing it with the one in the outer
scope.  Ugh!


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@13517 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-05-12 21:47:57 +00:00
Brian Gaeke
d657c42dce Start NextMBBNumber out at zero. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@13515 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-05-12 21:35:23 +00:00
Brian Gaeke
0bcb1ad7be Add non-const MachineBasicBlock::getParent() accessor method. 
MBBs start out as #-1. When a MBB is added to a MachineFunction, it
gets the next available unique MBB number. If it is removed from a
MachineFunction, it goes back to being #-1.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@13514 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-05-12 21:35:22 +00:00
Chris Lattner
8abf69374e Switch this from using an std::map to using a DenseMap. This speeds up 
phi-elimination from 0.6 to 0.54s on kc++.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@13454 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-05-10 19:17:36 +00:00
Chris Lattner
80e20eb487 Use a new VRegPHIUseCount to compute uses of PHI values by other phi values 
in the basic block being processed.  This fixes PhiElimination on kimwitu++
from taking 105s to taking a much more reasonable 0.6s (in a debug build).


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@13453 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-05-10 19:06:37 +00:00
Chris Lattner
791f896d9f Now that we use an ilist of machine instructions, iterators are more robust 
than before.  Because this is the case, we can compute the first non-phi
instruction once when de-phi'ing a block.  This shaves ~4s off of
phielimination of _Z7yyparsev in kimwitu++ from 109s -> 105s.  There are
still much more important gains to come.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@13452 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-05-10 18:47:18 +00:00
Chris Lattner
6d3848df7e Patch to fix PR337. Make sure to mark all aliased physical registers as used 
when we see a read of a register.  This is important in cases like:

AL = ...
AH = ...

   = AX

The read of AX must make both the AL and AH defs live until the use.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@13444 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-05-10 05:12:43 +00:00
Chris Lattner
0979ca7e3e Implement the AddPrototypes method 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@13432 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-05-09 04:29:57 +00:00
Tanya Lattner
73e3e2e10f Updating my versions of ModuloScheduling in cvs. Still not complete. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@13424 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-05-08 16:12:10 +00:00
Alkis Evlogimenos
880e8e4b4c Add required header 
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
Alkis Evlogimenos
feab248c93 Remove unneeded header 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@13416 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-05-08 03:49:35 +00:00
Chris Lattner
a19eedeb7a numeric_limits::infinity() apparently does not work on all systems. As a 
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
Chris Lattner
015959ee38 Operate on the Machine CFG instead of on the LLVM CFG 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@13302 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-05-01 21:24:39 +00:00
Chris Lattner
f25fb4bc64 Stop LiveVariables from using BasicBlocks as part of the mapping, instead 
use MachineBasicBlocks.  To do this, we traverse the Machine CFG instead of
the LLVM CFG, which is also *MUCH* more efficient by having fewer levels of
indirections and mappings.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@13301 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-05-01 21:24:24 +00:00
Brian Gaeke
35450d2aaa Include SparcV9RegInfo.h instead of TargetRegInfo.h. This serves as a bit of 
documentation that this module needs to be made independent of the
register file description of the current target.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@13125 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-04-23 18:15:46 +00:00
Brian Gaeke
da8246bb71 Implement emitWordAt() for the debug emitter and the file printer emitter. (I 
am not so sure about the file printer emitter, but the debug emitter change
should be harmless.)


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@13117 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-04-23 17:11:13 +00:00
Alkis Evlogimenos
6e4d0d6546 Fix bug introduced in previous commit. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@12872 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-04-12 20:26:39 +00:00
Alkis Evlogimenos
43b61f724e Correctly compute spill weights 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@12869 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-04-12 17:39:20 +00:00
Alkis Evlogimenos
e633352fd5 Print def lists a bit more compactly 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@12866 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-04-12 15:57:58 +00:00
Alkis Evlogimenos
9a8b490735 Add definition list to each live interval. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@12791 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-04-09 18:07:57 +00:00
Chris Lattner
b4186e0ccd MBB::remove should not modify the iterator passed in 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@12572 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-03-31 21:59:59 +00:00
Chris Lattner
4f6410f5cb MachineBasicBlock::remove should not modify the iterator passed in 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@12571 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-03-31 21:59:29 +00:00
Alkis Evlogimenos
a8db01ac83 Correctly update LiveVariables when an instruction changes 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@12561 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-03-30 22:44:39 +00:00
Brian Gaeke
47b716483e Change how the beginnings and ends of MachineFunctions are printed. Get 
rid of the funny cast.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@12537 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-03-29 21:58:31 +00:00
Alkis Evlogimenos
eee91172fb Make the set of fixed (preallocated) intervals be a fixed superset of 
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
Chris Lattner
6ae9eb1566 Fix PR294 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@12425 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-03-16 01:45:55 +00:00
Alkis Evlogimenos
39354c99a1 Change MRegisterInfo::foldMemoryOperand to return the folded 
instruction to make the API more flexible.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@12386 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-03-14 07:19:51 +00:00
Alkis Evlogimenos
6a367f33f3 Spill explicit physical register defs as well. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@12260 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-03-09 08:35:13 +00:00
Alkis Evlogimenos
5ae00066c6 As I wrote in the docs, simple is the default spiller :-) 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@12189 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-03-06 23:08:44 +00:00
Alkis Evlogimenos
499b2bad27 Add simple spiller. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@12188 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-03-06 22:38:29 +00:00
Brian Gaeke
c54839573c Make MachineOperand's value named 'contents'. Make really, really sure 
it is always completely initialized and copied.
Also, fix up many comments and asserts.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@12100 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-03-03 19:07:27 +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. 
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 
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
Brian Gaeke
05b15fb075 TargetCacheInfo has been removed; its only uses were to propagate a constant 
(16) into certain areas of the SPARC V9 back-end. I'm fairly sure the US IIIi's
dcache has 32-byte lines, so I'm not sure where the 16 came from. However, in
the interest of not breaking things any more than they already are, I'm going
to leave the constant alone.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@12043 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-03-01 06:43:29 +00:00
Tanya Lattner
9b3cbdbedb Adding new Modulo Scheduling graph files. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@12031 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-03-01 02:50:57 +00:00
Tanya Lattner
d14b83733e Removing old graph files with new graph files that I wrote. Updated ModuloScheduling pass, but still in progress. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@12030 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-03-01 02:50:01 +00:00
Chris Lattner
92bc3bc11c Add an assert 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@12010 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-02-29 22:01:51 +00:00
Chris Lattner
c81295ab24 Add back #include I messed up 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@12009 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-02-29 21:40:53 +00:00
Chris Lattner
e8d43fdced Urg, forgot to check this in. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@12007 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-02-29 21:03:08 +00:00
Chris Lattner
08d4963d49 Move the private MachineInstrAnnot.h into a private directory. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@12003 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-02-29 19:12:51 +00:00
Chris Lattner
78827e9f8b Remove use of an ugly header 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@12002 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-02-29 19:04:31 +00:00
Chris Lattner
585911ee21 Move methods out of .h file 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@12001 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-02-29 19:02:39 +00:00
Chris Lattner
bceb68807f Eliminate the distinction between "real" and "unreal" instructions 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11986 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-02-29 06:31:16 +00:00
Chris Lattner
561c0107b2 int64_t -> int 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11977 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-02-29 05:07:02 +00:00
Alkis Evlogimenos
fc54e83cea Rename member function to be consistent with the rest. 
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
57af2cf6f3 Make spiller push stores right after the definition of a register so 
that they are as far away from the loads as possible.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11895 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-02-27 04:51:35 +00:00
Alkis Evlogimenos
ddcfd9e6fa Fix crash caused by passing register 0 to 
MRegisterInfo::isPhysicalRegister().


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11894 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-02-27 01:52:34 +00:00
Alkis Evlogimenos
8fa16e47f8 Clear maps right after basic block is processed. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11892 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-02-26 23:22:23 +00:00
Alkis Evlogimenos
71e353ed35 Uncomment assertions that register# != 0 on calls to 
MRegisterInfo::is{Physical,Virtual}Register. Apply appropriate fixes
to relevant files.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11882 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-02-26 22:00:20 +00:00
Chris Lattner
7b1af15612 No need to clear the map here, it will always be empty 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11868 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-02-26 05:21:21 +00:00
Alkis Evlogimenos
e3fcabe068 Fix bugs found with recent addition of assertions in 
MRegisterInfo::is{Physical,Virtual}Register.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11849 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-02-25 23:21:52 +00:00
Brian Gaeke
367b91d1bd Great sparc renaming fallout IV: Sparc --> SparcV9. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11844 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-02-25 22:09:36 +00:00
Alkis Evlogimenos
1d8b28a357 Remove asssert since it is breaking cases that it shouldn't. 
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
Alkis Evlogimenos
4d0d864be3 Add DenseMap template and actually use it for for mapping virtual regs 
to objects.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11840 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-02-25 21:55:45 +00:00
Chris Lattner
95c34f2efd Add an assertion 
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
Brian Gaeke
748fba141f FunctionLiveVarInfo.h moved: include/llvm/CodeGen -> lib/Target/Sparc/LiveVar 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11804 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-02-24 19:46:00 +00:00
Alkis Evlogimenos
0d6c5b6489 Move machine code rewriter and spiller outside the register 
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
ec8b8bb9ab Add predicates for checking if a virtual register has a physical 
register mapping or a stack slot mapping.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11795 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-02-24 06:30:36 +00:00
Alkis Evlogimenos
e8124b9ddb Make enum private as it is an implementation detail. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11782 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-02-23 23:49:40 +00:00
Alkis Evlogimenos
797428719f Remove '4Virt' from member function names as it is obvious. 
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 
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. 
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
Chris Lattner
11d1f21e1d Fix bugs in finegrainification 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11758 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-02-23 18:40:08 +00:00
Chris Lattner
0742b59913 Finegrainify namespacification 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11757 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-02-23 18:38:20 +00:00
Alkis Evlogimenos
e699b16a76 Use MachineBasicBlock::getParent(). 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11756 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-02-23 18:36:38 +00:00
Alkis Evlogimenos
e6394e2b62 Remove implementation of default constructor as it is useless now. 
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
743d0a1f83 Refactor rewinding code for finding the first terminator of a basic 
block into MachineBasicBlock::getFirstTerminator().

This also fixes a bug in the implementation of the above in both
RegAllocLocal and InstrSched, where instructions where added after the
terminator if the basic block's only instruction was a terminator (it
shouldn't matter for RegAllocLocal since this case never occurs in
practice).


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11748 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-02-23 18:14:48 +00:00
Alkis Evlogimenos
12edc7ef3d Improved PhysRegTracker interface. RegAlloc lazily allocates the register tracker using a std::auto_ptr 
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
fc2b449a17 Simplify iterator usage now that we have next(). Also don't pass iterators by reference now that MachineInstr* are in an ilist 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11732 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-02-23 04:12:30 +00:00
Alkis Evlogimenos
25d9d5800c Some code cleanups from Chris 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11724 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-02-23 01:57:39 +00:00
Alkis Evlogimenos
534f545ef1 Fix comments in PhysRegTracker and rename isPhysRegAvail to isRegAvail to be consistent with the other two 
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
98e17cf543 Move LiveIntervals.h up to be the first included header 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11721 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-02-23 01:01:21 +00:00
Alkis Evlogimenos
888b1a6ccd Pull PhysRegTracker out of RegAllocLinearScan as it can be used by other allocators as well 
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 
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
Chris Lattner
d0d1c8f830 Another bug fix for empty MBB's 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11716 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-02-22 19:37:31 +00:00
Chris Lattner
688c8252d2 Fix a bug where we were implicitly assuming that there would be at least 
one terminator instruction in each basic block.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11714 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-02-22 19:08:15 +00:00
Alkis Evlogimenos
0f338a1e8c Print basic block boundaries in machine instruction debug output. 
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
7200c6b82a Abstract merging of ranges away from number of slots per instruction. 
Also make it less aggressive as the current implementation breaks in
some cases.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11696 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-02-22 04:05:13 +00:00
Alkis Evlogimenos
d6f6d1a80d Make 'fold' statistic's description the same in both allocators. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11687 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-02-21 18:07:33 +00:00
Alkis Evlogimenos
007726ca6f Some more statistics improvements. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11676 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-02-20 20:53:26 +00:00
Alkis Evlogimenos
df158c7e3f Disambiguate statistic descriptions. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11675 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-02-20 20:46:49 +00:00
Alkis Evlogimenos
cea4471120 Rename statistic and add another one. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11674 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-02-20 20:43:08 +00:00
Alkis Evlogimenos
fa510c4af5 Fix crash in debug output. 
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. 
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: 
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() 
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
Chris Lattner
d368c6163a Fix problem fusing spill code into instructions: we didn't update the live 
variable information to take into account the change of instruction
address.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11628 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-02-19 18:34:02 +00:00
Chris Lattner
a96478d7d6 Fix an iterator invalidation problem. :( 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11627 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-02-19 18:32:29 +00:00
Chris Lattner
5ed001b6af Add method to update livevar when an instruction moves 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11625 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-02-19 18:28:02 +00:00
Chris Lattner
8517e1f0be Fix a __LONG__ term annoyance of mine: symbolic registers weren't being printed 
by operator<< on MachineInstr's, and looking up what register "24" is all of the
time was greatly annoying.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11623 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-02-19 16:17:08 +00:00
Chris Lattner
5e61fa9519 Add a MachineBasicBlock::getParent() method 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11622 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-02-19 16:13:54 +00:00
Alkis Evlogimenos
2acef2da06 Rename reloads/spills to loads/stores. 
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
Alkis Evlogimenos
779e640657 Implement assignment correctness verification. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11609 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-02-18 23:15:23 +00:00
Alkis Evlogimenos
52f8f56ef4 Move unused typedefs in private section. Add method to return interval 
given a register.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11608 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-02-18 23:14:52 +00:00
Chris Lattner
e6d04f1a99 Eliminate operator[] is deprecated warnings 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11578 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-02-18 16:43:51 +00:00
Chris Lattner
fdc01cedd4 Fix deprecated operator[] warnings 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11577 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-02-18 16:38:18 +00:00
Alkis Evlogimenos
23c114fd3b Be more agressive when joining ranges. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11575 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-02-18 04:38:37 +00:00
Alkis Evlogimenos
99d9923608 Fix overly conservative spill interval computation. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11574 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-02-18 03:35:38 +00:00
Alkis Evlogimenos
3a9986f5d8 Beautify debug output. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11573 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-02-18 00:35:06 +00:00
Chris Lattner
56ddada278 Remove the -disable-kill option. The register allocator is buggy with it, 
and it was only for debugging in the first place.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11557 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-02-17 17:49:10 +00:00
Chris Lattner
11390e76e7 Add support to the local allocator for fusing spill code into the instructions 
that need them.  This is very useful on CISCy targets like the X86 because it
reduces the total spill pressure, and makes better use of it's (large)
instruction set.  Though the X86 backend doesn't know how to rewrite many
instructions yet, this already makes a substantial difference on 176.gcc for
example:

Before:
Time:
   8.0099 ( 31.2%)   0.0100 ( 12.5%)   8.0199 ( 31.2%)   7.7186 ( 30.0%)  Local Register Allocator

Code quality:
734559 asm-printer           - Number of machine instrs printed
111395 ra-local              - Number of registers reloaded
 79902 ra-local              - Number of registers spilled
231554 x86-peephole          - Number of peephole optimization performed

After:
Time:
   7.8700 ( 30.6%)   0.0099 ( 19.9%)   7.8800 ( 30.6%)   7.7892 ( 30.2%)  Local Register Allocator
Code quality:
733083 asm-printer           - Number of machine instrs printed
  2379 ra-local              - Number of reloads fused into instructions
109046 ra-local              - Number of registers reloaded
 79881 ra-local              - Number of registers spilled
230658 x86-peephole          - Number of peephole optimization performed

So by fusing 2300 instructions, we reduced the  static number of instructions
by 1500, and reduces the number of peepholes (and thus the work) by about 900.
This also clearly reduces the number of reload/spill instructions that are
emitted.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11542 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-02-17 08:09:40 +00:00
Chris Lattner
cdee28724e Fix a bug in my previous refactoring change... arg! 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11535 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-02-17 07:02:17 +00:00
Alkis Evlogimenos
7093d37304 Add LiveIntervals::Interval::empty() member function. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11520 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-02-17 05:14:37 +00:00
Chris Lattner
1e3812c1c5 Once we have a way to fold spill code reloads into instructions, we have a way to use it. :) 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11517 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-02-17 04:08:37 +00:00
Alkis Evlogimenos
355a724bd8 Fix spilled interval update. It was too conservative. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11516 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-02-17 04:04:20 +00:00
Chris Lattner
42e0a8fded Refactor code a bit. No functionality changes, though the comment hints at things to come. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11515 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-02-17 03:57:19 +00:00
Alkis Evlogimenos
aad5c05051 Add LeakDetection to MachineInstr. 
Move out of line member functions of MachineBasicBlock to
MachineBasicBlock.cpp.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11497 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-02-16 07:17:43 +00:00
Chris Lattner
9b700f7951 By default, llvm.setjmp/llvm.longjmp intrinsics get lowered to their libc counterparts 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11483 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-02-15 22:24:51 +00:00
Chris Lattner
588e72db75 Refactor code. Now the intrinsic lowering pass tries to recycle preexisting 
prototypes, even if they don't precisely match what it would prefer to use.
This fixes: CBackend/2004-02-15-PreexistingExternals.llx compiling it into:

  ltmp_0_30 = memcpy(l14_C, 4u, 17);
  ltmp_1_30 = memcpy(((int *)l27_A), ((unsigned )(long)l27_B), ((int )123u));

instead of:

  ltmp_0_30 = memcpy(l14_C, 4u, 17);
  ltmp_1_27 = l43_memcpy(l27_A, l27_B, 123u);

Which does the wrong thing as you could imagine.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11481 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-02-15 22:16:39 +00:00
Alkis Evlogimenos
f11800b718 This pass should not require phi elimination or live variable 
analysis. It should only preserve them and update LiveVariables if it
already ran.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11479 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-02-15 21:50:32 +00:00
Chris Lattner
5aaf1d2820 Finegrainify namespacification 
Remove one of the operands of a two operand instruction


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11478 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-02-15 21:38:28 +00:00
Alkis Evlogimenos
859a18b583 Make dense maps keyed on physical registers smallerusing 
MRegisterInfo::getNumRegs() instead of
MRegisterInfo::FirstVirtualRegister.

Also use MRegisterInfo::is{Physical,Virtual}Register where
appropriate.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11477 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-02-15 21:37:17 +00:00
Alkis Evlogimenos
843b160a20 Eliminate the use of spill (reserved) registers. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11476 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-02-15 10:24:21 +00:00
Chris Lattner
05d8350c12 Allow for fixed objects to reside in the local area, and if they don't to not 
clobber them by allocating other objects in the same space!


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11454 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-02-15 00:14:20 +00:00
Alkis Evlogimenos
c81efdc59c Add back machine code deleter pass until we get a MachineCode pass 
that will be responsible for the creation of MachineFunctions and will
be required by all MachineFunctionPass passes.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11453 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-02-15 00:03:15 +00:00
Chris Lattner
93799292c1 There is no reason to align the stack pointer if there are no callees of this function! 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11449 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-02-14 20:10:59 +00:00
Chris Lattner
cc42d2c3cc A target that doesn't support these intrinsics will still meet spec (the 
intrinsic will always produce zero), but it will behave unexpectedly, so
warn like GCC does.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11444 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-02-14 04:52:06 +00:00
Chris Lattner
cf89908381 Add llvm.memset/frameaddress/returnaddress intrinsics. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11431 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-02-14 02:47:17 +00:00
Alkis Evlogimenos
f81af21caf Use newly added next() and prior() utility functions. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11430 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-02-14 01:18:34 +00:00
Alkis Evlogimenos
6ab5c15962 Use std::numeric_limits<float>::infinity() instead of 
std::numeric_limits<float>::max() for weighting preallocated
intervals.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11427 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-02-14 00:44:07 +00:00
Alkis Evlogimenos
be766c7246 Remove getAllocatedRegNum(). Use getReg() instead. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11393 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-02-13 21:01:20 +00:00
Alkis Evlogimenos
4de473bc59 Use getNumVirtualRegs(). 
Whitespace cleanups.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11389 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-02-13 18:20:47 +00:00
Brian Gaeke
90421cd8f9 Refactor MachineFunction::print() into MachineBasicBlock::print(). 
Add MachineBasicBlock::dump().


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11364 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-02-13 04:39:55 +00:00
Brian Gaeke
21326fc2ad Add head-of-file comments and Doxygen comments. Tighten up a lot of whitespace. 
Rename SetMachineOperandConst's formal parameters to match other methods here.
Mark some methods as being used only by the SPARC back-end.
Fix a missing-paren bug in OutputValue().


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11363 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-02-13 04:39:32 +00:00
Alkis Evlogimenos
ab8672c8bb Add parent pointer to MachineInstr that points to owning 
MachineBasicBlock. Also change opcode to a short and numImplicitRefs
to an unsigned char so that overall MachineInstr's size stays the
same.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11357 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-02-12 18:49:07 +00:00
Chris Lattner
2751e76a70 Add support for the llvm.memmove intrinsic 
Patch graciously contributed by Reid Spencer!


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11355 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-02-12 18:11:20 +00:00
Chris Lattner
5fe51cc2c4 Implement the llvm.memcpy intrinsic 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11349 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-02-12 17:01:09 +00:00
Chris Lattner
2a90ba6017 Rename the opCode instance variable to Opcode 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11348 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-02-12 16:09:53 +00:00
Chris Lattner
3081db8d01 This field is never read 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11346 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-02-12 16:04:49 +00:00
Alkis Evlogimenos
c0b9dc5be7 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.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11340 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-02-12 02:27:10 +00:00
Brian Gaeke
918cdd420b getOpCode() --> getOpcode(). 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11339 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-02-12 01:34:05 +00:00
Chris Lattner
61b08f193a Add #include 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11285 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-02-10 21:18:55 +00:00
Chris Lattner
1cbe4d0ad0 Do not use MachineOperand::isVirtualRegister either! 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11283 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-02-10 21:12:22 +00:00
Chris Lattner
3d878d80d6 Eliminate users of MachineOperand::isPhysicalRegister 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11278 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-02-10 20:41:10 +00:00
Brian Gaeke
f738db0818 Move InstrSchedule's iterator begin/end methods inline. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11239 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-02-09 18:42:46 +00:00
Brian Gaeke
0dc5753f2b 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().


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11238 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-02-09 18:42:05 +00:00
Chris Lattner
ecea5635f8 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.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11219 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-02-09 02:12:04 +00:00
Chris Lattner
499487742e 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


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11217 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-02-09 01:43:23 +00:00
Chris Lattner
96aef89338 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.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11216 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-02-09 01:35:21 +00:00
Chris Lattner
64667b6418 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 :(


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11215 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-02-09 01:26:13 +00:00
Alkis Evlogimenos
f5eaf16b94 Increase code clarity. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11151 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-02-06 18:08:18 +00:00
Alkis Evlogimenos
54d23c754a Eliminate uneeded lookups by passing a Virt2PhysMap::iterator instead 
of the virtual register to certain functions.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11143 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-02-06 03:15:40 +00:00
Alkis Evlogimenos
0b8cb2bc47 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)


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11141 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-02-05 22:55:25 +00:00
Alkis Evlogimenos
ad48cd6327 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.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11135 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-02-05 20:45:40 +00:00
Tanya Lattner
5a5960978a Added missing include. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11129 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-02-05 05:04:39 +00:00
Alkis Evlogimenos
14be64018f Modify the two address instruction pass to remove the duplicate 
operand of the instruction and thus simplify the register allocation.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11124 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-02-04 22:17:40 +00:00
Alkis Evlogimenos
4e7854407c 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.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11093 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-02-03 01:13:07 +00:00
Alkis Evlogimenos
9fe7602862 Revert changes. Will implement this using a different set of primitives 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11091 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-02-02 23:08:58 +00:00
Alkis Evlogimenos
cc6a1290fc Fix debugging output. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11088 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-02-02 22:00:32 +00:00
Alkis Evlogimenos
eea81bafd6 Correctly update def/use information for modified machine operands. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11087 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-02-02 21:56:40 +00:00
Alkis Evlogimenos
b606eaca1b Should be more careful. The previously applied change made all counts 
outside of loops = 0.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11085 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-02-02 20:29:57 +00:00
Alkis Evlogimenos
22b7e44bb0 Create an object for tracking physical register usage. This will look 
much better when I get rid of the reserved registers.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11066 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-02-02 07:30:36 +00:00
Alkis Evlogimenos
04667297af 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.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11061 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-02-01 20:13:26 +00:00
Alkis Evlogimenos
f440cc19c9 Use std::map::count() instead of std::map::find() != std::map::end() 
where appropriate.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11060 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-02-01 18:39:53 +00:00
Alkis Evlogimenos
b180e3e92b Change string for joined intervals. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11057 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-02-01 16:13:05 +00:00
Alkis Evlogimenos
b0b0ebaac0 Change xor to ^. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11054 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-02-01 08:19:25 +00:00
Chris Lattner
d4baf0f74c Fix a bug in a recent checkin 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11050 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-02-01 05:25:07 +00:00
Alkis Evlogimenos
676cf8cb1d Missed one silly assert :-) 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11048 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-02-01 02:21:31 +00:00
Alkis Evlogimenos
01e74a2aab Simplify joinIntervals() code. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11047 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-02-01 02:18:31 +00:00
Alkis Evlogimenos
4f67b86648 Use MRegisterInfo::isPhysicalRegister and 
MRegisterInfo::isVirtualRegister.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11045 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-02-01 01:27:01 +00:00
Alkis Evlogimenos
52220f61bb Apply final part of Chris' patch. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11040 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-01-31 23:48:47 +00:00
Alkis Evlogimenos
02ba13c989 Be a little smarter on the way we handle physical register defs. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11038 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-01-31 23:13:30 +00:00
Chris Lattner
ef09c63e7b Finegrainify namespacification, use new MRegisterInfo::isVirtualRegister 
method


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11037 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-01-31 21:27:19 +00:00
Chris Lattner
6b50767905 Fix, correctly this time, the computation of the return value 
Fix a spello
Tighten up the assertion checking

No functionality changes.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11036 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-01-31 21:21:43 +00:00
Chris Lattner
163c1e7a69 * Fix incorrect computation of the runOnMachineFunction return value 
* Turn a bunch of instance variables into automatic variables


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11035 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-01-31 21:14:04 +00:00
Chris Lattner
bd91c1c376 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


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11034 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-01-31 21:07:15 +00:00
Alkis Evlogimenos
08cec00588 Merge safe parts from last night's buggy commit. These do not break 
any test cases :-)


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11032 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-01-31 19:59:32 +00:00
Alkis Evlogimenos
97017de187 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.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11030 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-01-31 16:54:54 +00:00
Alkis Evlogimenos
4d46e1e521 Revert last night's changes as they broke some tests. Will remerge parts of the patch. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11029 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-01-31 14:37:41 +00:00
Alkis Evlogimenos
32bdd4ea65 Several performance enhancements and cleanups from Chris. 
Simplification of LiveIntervals::Interval::overlaps() and addition of
examples to overlaps() and liveAt() to make them clearer.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11028 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-01-31 04:56:07 +00:00
Chris Lattner
49a5aaacef Finegrainify namespacification 
Implement LiveVariables::getIndexMachineBasicBlock


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11018 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-01-30 22:08:53 +00:00
Brian Gaeke
09caa3751f Give clients of MachineFunctionPrinter the ability to specify a banner and 
choose an ostream.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11016 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-01-30 21:53:46 +00:00
Alkis Evlogimenos
79b0c3f0b9 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.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10973 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-01-23 13:37:51 +00:00
Alkis Evlogimenos
e88280a422 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.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10965 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-01-22 23:08:45 +00:00
Alkis Evlogimenos
84dc5fb6ba Remove unneeded check. An interval in active, by definition overlaps 
with the current one.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10959 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-01-22 20:07:18 +00:00
Alkis Evlogimenos
ce50115006 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.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10958 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-01-22 19:24:43 +00:00
Alkis Evlogimenos
1075ecd32f Revert previous change. The code was correct... 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10957 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-01-22 19:17:52 +00:00
Alkis Evlogimenos
e1a210777d Fix incorrect negatives in LiveIntervals::Interval::liveAt(). 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10956 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-01-22 18:33:50 +00:00
Tanya Lattner
06723077ed Moved iterators around. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10926 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-01-20 17:51:13 +00:00
Tanya Lattner
a105c802b2 Moved iterators to common file. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10925 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-01-20 17:49:42 +00:00
Alkis Evlogimenos
a12c7bb06f Handle printing of intervals that are not assign to any physical 
register yet (2nd try).


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10896 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-01-16 20:33:13 +00:00
Alkis Evlogimenos
a6d8c3f845 Handle printing of intervals that are not assign to any physical 
register yet.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10895 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-01-16 20:29:42 +00:00
Alkis Evlogimenos
3b02cbe752 Fold open interval ends handling into 
LiveIntervals::Interval::expiredAt() and simplify regalloc code.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10894 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-01-16 20:17:05 +00:00
Alkis Evlogimenos
1893a05b28 Add asserts to previous change. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10893 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-01-16 16:23:23 +00:00
Alkis Evlogimenos
f5f1689ed2 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.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10892 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-01-16 16:06:59 +00:00
Chris Lattner
f907bac068 Hrm, apparently I missed lowering this intrinsic. :( 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10858 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-01-14 20:41:29 +00:00
Alkis Evlogimenos
d6e40a6cbc Properly update #intervals statistic. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10847 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-01-14 10:44:29 +00:00
Alkis Evlogimenos
9739736b94 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.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10835 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-01-14 00:20:09 +00:00
Alkis Evlogimenos
5ab20273a4 Improve debugging output. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10834 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-01-14 00:09:36 +00:00
Alkis Evlogimenos
af25473d5e 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.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10833 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-01-13 22:26:14 +00:00
Alkis Evlogimenos
1a119e2410 Remove allocatable registers vector. It is already provided by 
LiveVariables.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10830 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-01-13 22:10:43 +00:00
Alkis Evlogimenos
a3a6524965 Cleanup debugging output. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10824 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-01-13 21:53:20 +00:00
Alkis Evlogimenos
63841bc85d Fix output of live intervals to show correctly its closed, open 
ranges, i.e. [a,b)


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10822 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-01-13 21:17:47 +00:00
Alkis Evlogimenos
c55640f019 Remove unneeded check (with the recent change in live variables a use 
of a physical register is always dominated by a def).


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10821 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-01-13 21:16:25 +00:00
Alkis Evlogimenos
b7be115140 Indentation and whitespace cleanups. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10820 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-01-13 20:42:08 +00:00
Alkis Evlogimenos
f7df173e3b Fix bug introduced by previous commit: check if fixed intervals 
overlap before adding their spill weight.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10819 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-01-13 20:37:01 +00:00
Alkis Evlogimenos
19b6486d38 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.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10813 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-01-13 06:24:30 +00:00
Alkis Evlogimenos
b08bdc4a16 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.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10755 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-01-11 09:18:45 +00:00
Chris Lattner
ae7fc3aede Remove use of llvm/CodeGen/InstrSelection.h 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10749 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-01-10 19:16:26 +00:00
Chris Lattner
d5da197071 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.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10731 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-01-09 06:30:18 +00:00
Chris Lattner
2abcf524a1 Move InstrSelection into lib/Target/Sparc, as it's sparc specific 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10730 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-01-09 06:24:06 +00:00
Chris Lattner
75e260990d Move lib/Codegen/RegAlloc into lib/Target/Sparc, as it is sparc specific 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10728 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-01-09 06:17:12 +00:00
Alkis Evlogimenos
7d629b50a5 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% :-)


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10712 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-01-07 09:20:58 +00:00
Alkis Evlogimenos
1283d86b63 Minor cleanups. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10711 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-01-07 05:31:12 +00:00
Alkis Evlogimenos
75ca6a3e82 Remove declared but undefined method. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10710 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-01-07 02:29:33 +00:00
Alkis Evlogimenos
80b378cf7c Change implementation of LiveIntervals::overlap(). This results in a 
30-50% decrease in running time of the linear scan register allocator.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10707 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-01-07 01:45:58 +00:00
Alkis Evlogimenos
63caedf046 Remove simple coalescing. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10695 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-01-05 08:24:57 +00:00
Chris Lattner
8c2403631b fix warning 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10692 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-01-05 05:42:17 +00:00
Chris Lattner
77b1330ece Add VMCore and code generator support for debugging intrinsics. By default 
code generators completely ignore them.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10691 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-01-05 05:36:30 +00:00
Alkis Evlogimenos
271bd2d7f1 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.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10682 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-01-05 02:25:45 +00:00
Alkis Evlogimenos
50c047d159 Update description. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10681 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-01-04 23:09:24 +00:00
Chris Lattner
f70e0c216c Clean up a lot of the code I added yesterday by exposing the IntrinsicLowering 
implementation from the TargetMachine directly.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10636 91177308-0d34-0410-b5e6-96231b3b80d8
 2003-12-28 21:23:38 +00:00
Alkis Evlogimenos
27490a6fcc 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.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10635 91177308-0d34-0410-b5e6-96231b3b80d8
 2003-12-28 18:03:52 +00:00
Alkis Evlogimenos
26bfc08b80 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.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10634 91177308-0d34-0410-b5e6-96231b3b80d8
 2003-12-28 17:58:18 +00:00
Chris Lattner
aed386e6b0 Whoops, don't try to lower non intrinsic calls 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10632 91177308-0d34-0410-b5e6-96231b3b80d8
 2003-12-28 09:53:23 +00:00
Chris Lattner
f8742b3e03 Use the intrinsic lowering functionality 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10626 91177308-0d34-0410-b5e6-96231b3b80d8
 2003-12-28 09:43:35 +00:00
Chris Lattner
42450d8a5f Move into the VMCore library 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10623 91177308-0d34-0410-b5e6-96231b3b80d8
 2003-12-28 08:30:20 +00:00
Chris Lattner
3b66ecb05f Implement the default implementation of the intrinsic lowering class 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10621 91177308-0d34-0410-b5e6-96231b3b80d8
 2003-12-28 08:19:41 +00:00
Chris Lattner
aa4c91ff96 finegrainify namespacification 
minor cleanups


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10619 91177308-0d34-0410-b5e6-96231b3b80d8
 2003-12-28 07:59:53 +00:00
Alkis Evlogimenos
843397c237 Improve debugging output when choosing a register to spill. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10604 91177308-0d34-0410-b5e6-96231b3b80d8
 2003-12-24 18:53:31 +00:00
Alkis Evlogimenos
7a40eaacee 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).


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10603 91177308-0d34-0410-b5e6-96231b3b80d8
 2003-12-24 15:44:53 +00:00
Alkis Evlogimenos
3bf564a95f Change the way free regusters are computed and perform better 
allocation in the presence of preallocated intervals.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10595 91177308-0d34-0410-b5e6-96231b3b80d8
 2003-12-23 18:00:33 +00:00
Alkis Evlogimenos
056063e264 Fix crash when compiling twolf. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10584 91177308-0d34-0410-b5e6-96231b3b80d8
 2003-12-22 13:54:29 +00:00
Alkis Evlogimenos
4de1fefd7c Remove verifyIntervals() since it doesn't actually work right now. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10570 91177308-0d34-0410-b5e6-96231b3b80d8
 2003-12-21 20:41:26 +00:00
Alkis Evlogimenos
6b4edbaaf9 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 );


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10569 91177308-0d34-0410-b5e6-96231b3b80d8
 2003-12-21 20:19:10 +00:00
Alkis Evlogimenos
169cfd0196 Add support for inactive intervals. This effectively reuses registers 
for live ranges that fall into assigned registers' holes.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10566 91177308-0d34-0410-b5e6-96231b3b80d8
 2003-12-21 05:43:40 +00:00
Chris Lattner
16c45e9de8 Add a new target-independent machine code freeing pass 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10560 91177308-0d34-0410-b5e6-96231b3b80d8
 2003-12-20 10:20:58 +00:00
Chris Lattner
07f32d48f1 * 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.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10553 91177308-0d34-0410-b5e6-96231b3b80d8
 2003-12-20 09:17:07 +00:00
Alkis Evlogimenos
4c080863de Remove TwoAddressInstruction from the public headers and add an ID 
instead, since this pass doesn't expose any state to its users.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10520 91177308-0d34-0410-b5e6-96231b3b80d8
 2003-12-18 22:40:24 +00:00
Chris Lattner
5e46b513f3 Prune some #includes 
Add a statistic for # reloads


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10518 91177308-0d34-0410-b5e6-96231b3b80d8
 2003-12-18 20:25:31 +00:00
Alkis Evlogimenos
a71e05acdd 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.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10515 91177308-0d34-0410-b5e6-96231b3b80d8
 2003-12-18 13:15:02 +00:00
Alkis Evlogimenos
a3d0e5c2b2 Fix bug in reserved registers. DH actually aliases DX and EDX which 
are not reserved registers.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10514 91177308-0d34-0410-b5e6-96231b3b80d8
 2003-12-18 13:12:18 +00:00
Alkis Evlogimenos
9af9dbde7d Modify local register allocator to use the two-address instruction pass. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10513 91177308-0d34-0410-b5e6-96231b3b80d8
 2003-12-18 13:08:52 +00:00
Alkis Evlogimenos
71499ded4d 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.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10512 91177308-0d34-0410-b5e6-96231b3b80d8
 2003-12-18 13:06:04 +00:00
Alkis Evlogimenos
485ec3c21e Rename LiveIntervals::expired() to LiveIntervals::expiredAt(). 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10511 91177308-0d34-0410-b5e6-96231b3b80d8
 2003-12-18 08:56:11 +00:00
Alkis Evlogimenos
43f692f90f 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.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10510 91177308-0d34-0410-b5e6-96231b3b80d8
 2003-12-18 08:53:43 +00:00
Alkis Evlogimenos
dd2cc65f34 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.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10509 91177308-0d34-0410-b5e6-96231b3b80d8
 2003-12-18 08:48:48 +00:00
Alkis Evlogimenos
f6f91bf668 Change preserve all claim to just preserve live variables and phielimination. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10469 91177308-0d34-0410-b5e6-96231b3b80d8
 2003-12-15 04:55:38 +00:00
Alkis Evlogimenos
4d7af65903 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.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10461 91177308-0d34-0410-b5e6-96231b3b80d8
 2003-12-14 13:24:17 +00:00
Alkis Evlogimenos
94743e4915 When reserving a preallocated register spill the aliases of this 
register too.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10450 91177308-0d34-0410-b5e6-96231b3b80d8
 2003-12-13 11:58:10 +00:00
Alkis Evlogimenos
4c214d2bf0 Ignore non-allocatable physical registers in live interval analysis. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10449 91177308-0d34-0410-b5e6-96231b3b80d8
 2003-12-13 11:11:02 +00:00
Alkis Evlogimenos
7d65a12fe6 Expire any active intervals left when register allocation is done. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10448 91177308-0d34-0410-b5e6-96231b3b80d8
 2003-12-13 05:50:19 +00:00
Alkis Evlogimenos
f6e610c27d Add instruction numbers to debugging output. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10447 91177308-0d34-0410-b5e6-96231b3b80d8
 2003-12-13 05:48:57 +00:00
Alkis Evlogimenos
9435eda699 Handle explicit physical register defs. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10445 91177308-0d34-0410-b5e6-96231b3b80d8
 2003-12-13 05:26:39 +00:00
Alkis Evlogimenos
efe995a406 Remove unecessary if statements when looping on ImplicitDefs. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10444 91177308-0d34-0410-b5e6-96231b3b80d8
 2003-12-13 01:20:58 +00:00
John Criswell
f5ba89df1f This appears to fix Bug 172 and does not break any other feature tests or 
regression tests.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10388 91177308-0d34-0410-b5e6-96231b3b80d8
 2003-12-10 22:51:41 +00:00
Alkis Evlogimenos
a327e7fea9 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).


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10292 91177308-0d34-0410-b5e6-96231b3b80d8
 2003-12-05 11:31:39 +00:00
Alkis Evlogimenos
49787e35c3 Fix bug in register spilling when a preallocated live range overlaps a 
potential register assignment.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10291 91177308-0d34-0410-b5e6-96231b3b80d8
 2003-12-05 11:17:55 +00:00