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20 Commits

Author SHA1 Message Date
Lang Hames
857c4e01f8 VNInfo cleanup. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@73634 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-06-17 21:01:20 +00:00
Evan Cheng
90f95f88c6 Move register allocation preference (or hint) from LiveInterval to MachineRegisterInfo. This allows more passes to set them. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@73346 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-06-14 20:22:55 +00:00
Bill Wendling
51b16f4737 Untabification. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@72604 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-05-30 01:09:53 +00:00
Lang Hames
b0e519f2bf Prevented reg0 from being added to MBB live-in set, which was causing issues 
for PostRAScheduler. 


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@71991 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-05-17 23:50:36 +00:00
Lang Hames
87e3bcab73 Renamed Spiller classes (plus uses and related files) to VirtRegRewriter. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@71057 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-05-06 02:36:21 +00:00
Evan Cheng
c781a243a3 In some rare cases, the register allocator can spill registers but end up not utilizing registers at all. The fundamental problem is linearscan's backtracking can end up freeing more than one allocated registers. However, reloads and restores might be folded into uses / defs and freed registers might not be used at all. 
VirtRegMap keeps track of allocations so it knows what's not used. As a horrible hack, the stack coloring can color spill slots with *free* registers. That is, it replace reload and spills with copies from and to the free register. It unfold instructions that load and store the spill slot and replace them with register using variants.

Not yet enabled. This is part 1. More coming.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@70787 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-05-03 18:32:42 +00:00
Evan Cheng
5b69ebac85 It has finally happened. Spiller is now using live interval info. 
This fixes a very subtle bug. vr defined by an implicit_def is allowed overlap with any register since it doesn't actually modify anything. However, if it's used as a two-address use, its live range can be extended and it can be spilled. The spiller must take care not to emit a reload for the vn number that's defined by the implicit_def. This is both a correctness and performance issue.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@69743 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-04-21 22:46:52 +00:00
Sanjiv Gupta
12a9dc8c14 r66870 missed this out. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@67082 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-03-17 15:46:15 +00:00
Owen Anderson
49c8aa0d8b Convert VirtRegMap to a MachineFunctionPass. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@66870 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-03-13 05:55:11 +00:00
Owen Anderson
1ed5b714f1 Reorganization: Move the Spiller out of VirtRegMap.cpp into its own files. No (intended) functionality change. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@66720 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-03-11 22:31:21 +00:00
Evan Cheng
04ee5a1d92 Change TargetInstrInfo::isMoveInstr to return source and destination sub-register indices as well. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@62600 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-01-20 19:12:24 +00:00
Misha Brukman
ce07e99dd6 * Moved author attribution to CREDITS.TXT 
* Removed trailing whitespace


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@61927 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-01-08 16:40:25 +00:00
Misha Brukman
2a835f947a * Alphabetized #includes 
* Removed trailing whitespace


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@61926 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-01-08 15:50:22 +00:00
Argyrios Kyrtzidis
3713c0ba62 Fix compilation error on MSVC. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@59629 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-11-19 12:56:21 +00:00
Lang Hames
27601ef832 Big PBQP allocator update. Adds coalescing support, stack slot coloring, several bug-fixes. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@59414 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-11-16 12:12:54 +00:00
Lang Hames
56c523c63b Test commit. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@59293 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-11-14 06:51:35 +00:00
Dan Gohman
b8cab9227a Fix command-line option printing to print two spaces where needed, 
instead of requiring all "short description" strings to begin with
two spaces. This makes these strings less mysterious, and it fixes
some cases where short description strings mistakenly did not
begin with two spaces.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@57521 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-10-14 20:25:08 +00:00
Evan Cheng
17a82eaeb6 Fix typos pointed out by Duncan. Also untabify these files. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@57018 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-10-03 17:11:58 +00:00
Dan Gohman
d735b8019b Switch the MachineOperand accessors back to the short names like 
isReg, etc., from isRegister, etc.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@57006 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-10-03 15:45:36 +00:00
Evan Cheng
b1290a6cc4 A Partitioned Boolean Quadratic Programming (PBQP) based register allocator. 
Contributed by Lang Hames.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@56959 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-10-02 18:29:27 +00:00