Daniel Dunbar
8be4e61a2d
Fix some minor MSVC compiler warnings.
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llvm-svn: 76356
2009-07-19 01:38:38 +00:00
Daniel Dunbar
c6592df02d
Match declaration to definition.
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llvm-svn: 75440
2009-07-12 23:50:34 +00:00
Lang Hames
1bade5ff09
More VNInfo tweaking, plus a little progress on intra-block splitting.
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llvm-svn: 73750
2009-06-19 02:17:53 +00:00
Lang Hames
5c64015a56
VNInfo cleanup.
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llvm-svn: 73634
2009-06-17 21:01:20 +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
Bill Wendling
59276ca9d4
Forward decls.
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llvm-svn: 72114
2009-05-19 17:52:31 +00:00
Bill Wendling
5bc220b4eb
Remove 'class' specifier.
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llvm-svn: 72113
2009-05-19 17:51:26 +00:00
Bill Wendling
2914f42cce
Fix to compile on VS2008.
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llvm-svn: 72112
2009-05-19 17:50:18 +00:00
Lang Hames
079c2769b8
New Spiller interface and trivial implementation.
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llvm-svn: 72030
2009-05-18 19:03:16 +00:00
Lang Hames
fcc5ebb1d4
Renamed Spiller classes (plus uses and related files) to VirtRegRewriter.
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llvm-svn: 71057
2009-05-06 02:36:21 +00:00
Evan Cheng
a36c6c6819
It has finally happened. Spiller is now using live interval info.
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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.
llvm-svn: 69743
2009-04-21 22:46:52 +00:00
Evan Cheng
2d5be54315
Teach spiller to unfold instructions which modref spill slot when a scratch
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register is available and when it's profitable.
e.g.
xorq %r12<kill>, %r13
addq %rax, -184(%rbp)
addq %r13, -184(%rbp)
==>
xorq %r12<kill>, %r13
movq -184(%rbp), %r12
addq %rax, %r12
addq %r13, %r12
movq %r12, -184(%rbp)
Two more instructions, but fewer memory accesses. It can also open up
opportunities for more optimizations.
llvm-svn: 69341
2009-04-17 01:29:40 +00:00
Bill Wendling
1c40c8c242
Oy! When reverting r68073, I added in experimental code. Sorry...
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llvm-svn: 68099
2009-03-31 08:41:31 +00:00
Bill Wendling
4706abded2
Revert r68073. It's causing a failure in the Apple-style builds.
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llvm-svn: 68092
2009-03-31 08:26:26 +00:00
Evan Cheng
0dccb325d1
Spiller may unfold load / mod / store instructions as an optimization when the would be loaded value is available in a register. It needs to check if it's legal to clobber the register. Also, the register can contain values of multiple spill slots, make sure to check all instead of just the one being unfolded.
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llvm-svn: 67068
2009-03-17 01:23:09 +00:00
Owen Anderson
4060191b0e
Reorganize some #include's.
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llvm-svn: 66780
2009-03-12 06:58:19 +00:00
Owen Anderson
fb5980b6ab
Reorganization: Move the Spiller out of VirtRegMap.cpp into its own files. No (intended) functionality change.
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llvm-svn: 66720
2009-03-11 22:31:21 +00:00
