1905ae69c1
When a virtual register is folded into an instruction, keep track of whether
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it was a use, def, or both. This allows us to be less pessimistic in our
analysis of them. In practice, this doesn't make a big difference, but it
doesn't hurt either.
llvm-svn: 16632
2004-10-01 23:15:36 +00:00
cc37da1bcc
Document this class a bit :-)
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llvm-svn: 16626
2004-10-01 00:35:07 +00:00
39fef8df03
Use longer and more explicit names for instance vars (particularly important
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data structures). Fix the print method to send to the right ostream, not
always cerr. Delete typedefs that are only used once.
llvm-svn: 16606
2004-09-30 02:15:18 +00:00
e2b77d57c0
Reindent code, improve comments, move huge nested methods out of classes,
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prune #includes, add print/dump methods, etc. No functionality changes.
llvm-svn: 16604
2004-09-30 01:54:45 +00:00
7c16caa336
Changes For Bug 352
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Move include/Config and include/Support into include/llvm/Config,
include/llvm/ADT and include/llvm/Support. From here on out, all LLVM
public header files must be under include/llvm/.
llvm-svn: 16137
2004-09-01 22:55:40 +00:00
7eb2b1892b
Add function to clear all virtual->physical mappings but not assigned
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stack slots. This is in preparation for the iterative linear scan.
llvm-svn: 15032
2004-07-20 13:28:17 +00:00
fd735bcf28
Add method to assign stack slot to virtual register without creating a
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new one.
llvm-svn: 13895
2004-05-29 20:38:05 +00:00
e3cec71bdc
Add grow() member that grows the maps when the number of virtual
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registers in the function has changed.
llvm-svn: 13893
2004-05-29 19:03:29 +00:00
31953c7a10
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.
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llvm-svn: 12062
2004-03-01 23:18:15 +00:00
b76d234ee9
Add the long awaited memory operand folding support for linear scan
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llvm-svn: 12058
2004-03-01 20:05:10 +00:00
e669caafe0
Rename member function to be consistent with the rest.
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llvm-svn: 11898
2004-02-27 06:11:15 +00:00
d8bace7f60
Add DenseMap template and actually use it for for mapping virtual regs
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to objects.
llvm-svn: 11840
2004-02-25 21:55:45 +00:00
1dd872ce94
Move machine code rewriter and spiller outside the register
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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
63aea0b6a5
Add predicates for checking if a virtual register has a physical
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register mapping or a stack slot mapping.
llvm-svn: 11795
2004-02-24 06:30:36 +00:00
8b571a64ac
Make enum private as it is an implementation detail.
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llvm-svn: 11782
2004-02-23 23:49:40 +00:00
ab77b05d8c
Remove '4Virt' from member function names as it is obvious.
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llvm-svn: 11781
2004-02-23 23:47:10 +00:00
c794a9060f
Refactor VirtRegMap out of RegAllocLinearScan as the first part of bug
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251 (providing a generic machine code rewriter/spiller).
llvm-svn: 11780
2004-02-23 23:08:11 +00:00
Chris Lattner