ac0ca9241a
Fix some minor MSVC compiler warnings.
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llvm-svn: 76356
2009-07-19 01:38:38 +00:00
65553d4505
Match declaration to definition.
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llvm-svn: 75440
2009-07-12 23:50:34 +00:00
6b2c960cc4
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
16cab1935e
VNInfo cleanup.
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llvm-svn: 73634
2009-06-17 21:01:20 +00:00
fc968ef687
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
670da9a22a
Forward decls.
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llvm-svn: 72114
2009-05-19 17:52:31 +00:00
a3b8e84a57
Remove 'class' specifier.
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llvm-svn: 72113
2009-05-19 17:51:26 +00:00
a8705a95a6
Fix to compile on VS2008.
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llvm-svn: 72112
2009-05-19 17:50:18 +00:00
cf47d0134f
New Spiller interface and trivial implementation.
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llvm-svn: 72030
2009-05-18 19:03:16 +00:00
ab68cf24bb
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
1a99a5f501
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
b96a1082a9
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
b8017e02ca
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
c4b08e5eb0
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
76f1b47ec9
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
36a9937883
Reorganize some #include's.
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llvm-svn: 66780
2009-03-12 06:58:19 +00:00
aabe06d92a
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
Daniel Dunbar