Chris Lattner
1c0452caeb
Change Pass::print to take a raw ostream instead of std::ostream,
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update all code that this affects.
llvm-svn: 79830
2009-08-23 06:03:38 +00:00
Chris Lattner
6512a3a281
shoot a few more std::ostream print methods in the head.
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llvm-svn: 79814
2009-08-23 03:47:42 +00:00
Lang Hames
1a81422fab
Update to in-place spilling framework. Includes live interval scaling and trivial rewriter.
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llvm-svn: 72729
2009-06-02 16:53:25 +00:00
Evan Cheng
28aa6c41d1
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.
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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.
llvm-svn: 70787
2009-05-03 18:32:42 +00:00
Evan Cheng
0cfe303607
Livestacks really does preserve everything.
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llvm-svn: 56476
2008-09-22 22:26:15 +00:00
Evan Cheng
1ded8b6ad6
Instead of setPreservesAll, just mark them preseving machine loop info and machine dominators.
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llvm-svn: 56475
2008-09-22 22:21:38 +00:00
Evan Cheng
3bcf0cdd72
Mark several codegen passes as preserving all analysis.
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llvm-svn: 56469
2008-09-22 20:58:04 +00:00
Evan Cheng
2fc7954878
Add a stack slot coloring pass. Not yet enabled.
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llvm-svn: 51934
2008-06-04 09:18:41 +00:00
