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3543 Commits

Author SHA1 Message Date
Alkis Evlogimenos
941f9310bb Make spiller push stores right after the definition of a register so 
that they are as far away from the loads as possible.

llvm-svn: 11895
 2004-02-27 04:51:35 +00:00
Alkis Evlogimenos
519e1e8c92 Fix crash caused by passing register 0 to 
MRegisterInfo::isPhysicalRegister().

llvm-svn: 11894
 2004-02-27 01:52:34 +00:00
Alkis Evlogimenos
5a3bab9402 Clear maps right after basic block is processed. 
llvm-svn: 11892
 2004-02-26 23:22:23 +00:00
Alkis Evlogimenos
61719d48d2 Uncomment assertions that register# != 0 on calls to 
MRegisterInfo::is{Physical,Virtual}Register. Apply appropriate fixes
to relevant files.

llvm-svn: 11882
 2004-02-26 22:00:20 +00:00
Chris Lattner
28a0885929 No need to clear the map here, it will always be empty 
llvm-svn: 11868
 2004-02-26 05:21:21 +00:00
Alkis Evlogimenos
e62ddd405d Fix bugs found with recent addition of assertions in 
MRegisterInfo::is{Physical,Virtual}Register.

llvm-svn: 11849
 2004-02-25 23:21:52 +00:00
Brian Gaeke
84b76c9be0 Great sparc renaming fallout IV: Sparc --> SparcV9. 
llvm-svn: 11844
 2004-02-25 22:09:36 +00:00
Alkis Evlogimenos
a9f03fba9d Remove asssert since it is breaking cases that it shouldn't. 
llvm-svn: 11841
 2004-02-25 22:01:06 +00:00
Alkis Evlogimenos
d8bace7f60 Add DenseMap template and actually use it for for mapping virtual regs 
to objects.

llvm-svn: 11840
 2004-02-25 21:55:45 +00:00
Chris Lattner
f5a393a133 Add an assertion 
llvm-svn: 11830
 2004-02-25 19:37:44 +00:00
Brian Gaeke
10a32da382 FunctionLiveVarInfo.h moved: include/llvm/CodeGen -> lib/Target/Sparc/LiveVar 
llvm-svn: 11804
 2004-02-24 19:46:00 +00:00
Alkis Evlogimenos
1dd872ce94 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.

llvm-svn: 11798
 2004-02-24 08:58:30 +00:00
Alkis Evlogimenos
63aea0b6a5 Add predicates for checking if a virtual register has a physical 
register mapping or a stack slot mapping.

llvm-svn: 11795
 2004-02-24 06:30:36 +00:00
Alkis Evlogimenos
8b571a64ac Make enum private as it is an implementation detail. 
llvm-svn: 11782
 2004-02-23 23:49:40 +00:00
Alkis Evlogimenos
ab77b05d8c Remove '4Virt' from member function names as it is obvious. 
llvm-svn: 11781
 2004-02-23 23:47:10 +00:00
Alkis Evlogimenos
c794a9060f Refactor VirtRegMap out of RegAllocLinearScan as the first part of bug 
251 (providing a generic machine code rewriter/spiller).

llvm-svn: 11780
 2004-02-23 23:08:11 +00:00
Alkis Evlogimenos
52de9e214c Add number of spilled registers statistic. 
llvm-svn: 11759
 2004-02-23 18:45:32 +00:00
Chris Lattner
91a7dc0a6e Fix bugs in finegrainification 
llvm-svn: 11758
 2004-02-23 18:40:08 +00:00
Chris Lattner
43df6c268b Finegrainify namespacification 
llvm-svn: 11757
 2004-02-23 18:38:20 +00:00
Alkis Evlogimenos
b525d54045 Use MachineBasicBlock::getParent(). 
llvm-svn: 11756
 2004-02-23 18:36:38 +00:00
Alkis Evlogimenos
d780ce6462 Remove implementation of default constructor as it is useless now. 
llvm-svn: 11755
 2004-02-23 18:28:35 +00:00
Alkis Evlogimenos
af2de4848e 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).

llvm-svn: 11748
 2004-02-23 18:14:48 +00:00
Alkis Evlogimenos
f83cb74b57 Improved PhysRegTracker interface. RegAlloc lazily allocates the register tracker using a std::auto_ptr 
llvm-svn: 11738
 2004-02-23 06:10:13 +00:00
Alkis Evlogimenos
c31ff795d5 Simplify iterator usage now that we have next(). Also don't pass iterators by reference now that MachineInstr* are in an ilist 
llvm-svn: 11732
 2004-02-23 04:12:30 +00:00
Alkis Evlogimenos
887b941fbb Some code cleanups from Chris 
llvm-svn: 11724
 2004-02-23 01:57:39 +00:00
Alkis Evlogimenos
d42c2f24ec Fix comments in PhysRegTracker and rename isPhysRegAvail to isRegAvail to be consistent with the other two 
llvm-svn: 11723
 2004-02-23 01:25:05 +00:00
Alkis Evlogimenos
4d7ad6713d Move LiveIntervals.h up to be the first included header 
llvm-svn: 11721
 2004-02-23 01:01:21 +00:00
Alkis Evlogimenos
1410859484 Pull PhysRegTracker out of RegAllocLinearScan as it can be used by other allocators as well 
llvm-svn: 11720
 2004-02-23 00:53:31 +00:00
Alkis Evlogimenos
486b12b71a Move LiveIntervals.h to lib/CodeGen since it shouldn't be exposed to other parts of the compiler 
llvm-svn: 11719
 2004-02-23 00:50:15 +00:00
Chris Lattner
19aef9e757 Another bug fix for empty MBB's 
llvm-svn: 11716
 2004-02-22 19:37:31 +00:00
Chris Lattner
84b406650e Fix a bug where we were implicitly assuming that there would be at least 
one terminator instruction in each basic block.

llvm-svn: 11714
 2004-02-22 19:08:15 +00:00
Alkis Evlogimenos
cb352300c9 Print basic block boundaries in machine instruction debug output. 
llvm-svn: 11704
 2004-02-22 05:46:04 +00:00
Alkis Evlogimenos
d890f59f19 Abstract merging of ranges away from number of slots per instruction. 
Also make it less aggressive as the current implementation breaks in
some cases.

llvm-svn: 11696
 2004-02-22 04:05:13 +00:00
Alkis Evlogimenos
334114bdf1 Make 'fold' statistic's description the same in both allocators. 
llvm-svn: 11687
 2004-02-21 18:07:33 +00:00
Alkis Evlogimenos
6ad63f8da2 Some more statistics improvements. 
llvm-svn: 11676
 2004-02-20 20:53:26 +00:00
Alkis Evlogimenos
71751de25c Disambiguate statistic descriptions. 
llvm-svn: 11675
 2004-02-20 20:46:49 +00:00
Alkis Evlogimenos
f3e77fb7a7 Rename statistic and add another one. 
llvm-svn: 11674
 2004-02-20 20:43:08 +00:00
Alkis Evlogimenos
22de21ea80 Fix crash in debug output. 
llvm-svn: 11659
 2004-02-20 06:41:12 +00:00
Alkis Evlogimenos
bcc99a83ee Fix instruction numbering in debug output. 
llvm-svn: 11655
 2004-02-20 06:29:51 +00:00
Alkis Evlogimenos
76eca062ea 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.

llvm-svn: 11654
 2004-02-20 06:15:40 +00:00
Alkis Evlogimenos
3cf546037e Fix RA::verifyAssignment() 
llvm-svn: 11629
 2004-02-19 19:24:17 +00:00
Chris Lattner
f5c5e1f458 Fix problem fusing spill code into instructions: we didn't update the live 
variable information to take into account the change of instruction
address.

llvm-svn: 11628
 2004-02-19 18:34:02 +00:00
Chris Lattner
4c988391e1 Fix an iterator invalidation problem. :( 
llvm-svn: 11627
 2004-02-19 18:32:29 +00:00
Chris Lattner
afa9d7eb85 Add method to update livevar when an instruction moves 
llvm-svn: 11625
 2004-02-19 18:28:02 +00:00
Chris Lattner
63f41abfe6 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.

llvm-svn: 11623
 2004-02-19 16:17:08 +00:00
Chris Lattner
d23a882f2f Add a MachineBasicBlock::getParent() method 
llvm-svn: 11622
 2004-02-19 16:13:54 +00:00
Alkis Evlogimenos
d0a60b71fc Rename reloads/spills to loads/stores. 
llvm-svn: 11619
 2004-02-19 06:19:09 +00:00
Alkis Evlogimenos
b490a12501 Implement assignment correctness verification. 
llvm-svn: 11609
 2004-02-18 23:15:23 +00:00
Chris Lattner
83398e5574 Eliminate operator[] is deprecated warnings 
llvm-svn: 11578
 2004-02-18 16:43:51 +00:00
Chris Lattner
e99a833c20 Fix deprecated operator[] warnings 
llvm-svn: 11577
 2004-02-18 16:38:18 +00:00