Evan Cheng
def576f9e6
- More aggressively coalescing away copies whose source is defined by an implicit_def.
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- Added insert_subreg coalescing support.
llvm-svn: 49448
2008-04-09 20:57:25 +00:00
Evan Cheng
e86caa45cf
- Turn copies of implicit_def into implicit_def instructions.
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- Be smarter about coalescing copies from implicit_def.
llvm-svn: 49168
2008-04-03 16:41:54 +00:00
Evan Cheng
5750c3cd1e
Rewrite code that propagate isDead information after a dead copy is coalesced. This remove some ugly spaghetti code and fixed a number of subtle bugs.
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llvm-svn: 48490
2008-03-18 08:26:47 +00:00
Evan Cheng
02b66c3a32
- Fix a subtle bug in RemoveCopyByCommutingDef. ALR is the live range where the source is defined; BLR is the live range which is defined by the copy.
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If ALR and BLR overlaps and end of BLR extends beyond end of ALR, e.g.
A = or A, B
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B = A
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C = A<kill>
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= B
then do not add kills of A to the newly created B interval.
- Also fix some kill info update bug.
llvm-svn: 48141
2008-03-10 08:11:32 +00:00
Evan Cheng
8f5092bea8
Fix a coalescer bug wrt how dead copy interval is shortened.
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llvm-svn: 47966
2008-03-05 22:09:42 +00:00
Evan Cheng
18064ddb5b
Refactor code. Remove duplicated functions that basically do the same thing as
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findRegisterUseOperandIdx, findRegisterDefOperandIndx. Fix some naming inconsistencies.
llvm-svn: 47927
2008-03-05 00:59:57 +00:00
Evan Cheng
f6d76f2e52
No need for coalescer to update kills. Only copies are coalesced and those instructions will be deleted. Doh.
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llvm-svn: 47749
2008-02-29 02:50:03 +00:00
Evan Cheng
dd13a96a60
Refactor some code; check if commuteInstruction is able to commute the instruction.
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llvm-svn: 47208
2008-02-16 02:32:17 +00:00
Evan Cheng
bb357cd8a6
- Removing the infamous r2rMap_ and rep() method. Now the coalescer will update
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register defs and uses after each successful coalescing.
- Also removed a number of hacks and fixed some subtle kill information bugs.
llvm-svn: 47167
2008-02-15 18:24:29 +00:00
Evan Cheng
d4ddda68fa
Initial support for copy elimination by commuting its definition MI.
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PR1877.
A3 = op A2 B0<kill>
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B1 = A3 <- this copy
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= op A3 <- more uses
==>
B2 = op B0 A2<kill>
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B1 = B2 <- now an identify copy
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= op B2 <- more uses
This speeds up FreeBench/neural by 29%, Olden/bh by 12%, oopack_v1p8 by 53%.
llvm-svn: 47046
2008-02-13 03:01:43 +00:00
Dan Gohman
cabaec582f
Rename MRegisterInfo to TargetRegisterInfo.
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llvm-svn: 46930
2008-02-10 18:45:23 +00:00
Chris Lattner
ad9a6ccb83
Remove attribution from file headers, per discussion on llvmdev.
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llvm-svn: 45418
2007-12-29 20:36:04 +00:00
Dan Gohman
80af3e255d
Add explicit keywords, and fix a minor typo that they uncovered.
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llvm-svn: 45034
2007-12-14 15:41:34 +00:00
Evan Cheng
45c08c8337
Switch over to MachineLoopInfo.
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llvm-svn: 44838
2007-12-11 02:09:15 +00:00
Evan Cheng
bd9a038bd7
First step towards moving the coalescer to priority_queue based machinery.
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llvm-svn: 43764
2007-11-06 08:52:21 +00:00
Evan Cheng
ec35b58b0a
Move SimpleRegisterCoalescing.h to lib/CodeGen since there is now a common
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register coalescer interface: RegisterCoalescing.
llvm-svn: 43714
2007-11-05 17:41:38 +00:00
