Devang Patel
b6ebf8cbf3
Replace indunction variable with split value in loop body.
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This fixes art miscompile.
llvm-svn: 41195
2007-08-20 20:49:01 +00:00
Devang Patel
6c91023dad
Do not split loops rejected by processOneIterationLoop().
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llvm-svn: 41194
2007-08-20 20:24:15 +00:00
Devang Patel
17cd20c077
Avoid spliting loops where two split condition branches are not independent.
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llvm-svn: 41148
2007-08-18 00:00:32 +00:00
Devang Patel
fded73828f
When one branch of condition is eliminated then head of the other
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branch is not necessary immediate dominators of merge blcok in all cases.
llvm-svn: 41144
2007-08-17 21:59:16 +00:00
Devang Patel
423d18e306
Dominance frontier is now required.
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llvm-svn: 41096
2007-08-15 03:34:53 +00:00
Devang Patel
315ea9c519
Cleanup removeBlocks.
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Use dominance frontier to fixup incoming edges of successor blocks not domianted by DeadBB.
Use df_iterator to walk and delete basic blocks dominated by DeadBB.
llvm-svn: 41095
2007-08-15 03:31:47 +00:00
Reid Spencer
2cfe29fc0b
Remove unneeded header file.
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llvm-svn: 41094
2007-08-15 03:01:04 +00:00
Devang Patel
b0924a406a
Avoid triangle loops.
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llvm-svn: 41093
2007-08-15 02:14:55 +00:00
Devang Patel
d39b9d41bb
Avoid nested loops at the moment.
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llvm-svn: 41090
2007-08-14 23:53:57 +00:00
Devang Patel
7ff808f08e
Fix dominance frontier update while removing blocks.
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llvm-svn: 41082
2007-08-14 18:35:57 +00:00
Devang Patel
5d8b2b3293
Handle last value assignments.
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llvm-svn: 41063
2007-08-14 01:30:57 +00:00
Devang Patel
55b6a8f212
StartValue is already calculated.
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llvm-svn: 41062
2007-08-14 00:15:45 +00:00
Devang Patel
762259ba73
Preserve simple analysis.
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llvm-svn: 41054
2007-08-13 22:22:13 +00:00
Devang Patel
e3ea62e49a
Preserve dominator info.
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llvm-svn: 41053
2007-08-13 22:13:24 +00:00
Devang Patel
63d1affed8
Split loops and do CFG cleanup.
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llvm-svn: 41029
2007-08-12 07:02:51 +00:00
Reid Spencer
c71871ba30
Remove unused variables.
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llvm-svn: 41028
2007-08-12 04:45:36 +00:00
Devang Patel
c8cff19c2e
Clone loop.
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llvm-svn: 40998
2007-08-10 18:07:13 +00:00
Devang Patel
b1160475fd
Remove unncessary duplication.
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llvm-svn: 40979
2007-08-10 00:59:03 +00:00
Devang Patel
23c5e2dcd3
Calculate exit and start value of true loop and false loop respectively.
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llvm-svn: 40978
2007-08-10 00:53:35 +00:00
Devang Patel
51da0a465a
ExitCondition and Induction variable are loop constraints
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not split condition constraints.
llvm-svn: 40977
2007-08-10 00:33:50 +00:00
Devang Patel
652613b1db
Traverse loop blocks' terminators to find split candidates.
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llvm-svn: 40960
2007-08-09 01:39:01 +00:00
Devang Patel
30bf54b9d3
Add cost analysis.
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llvm-svn: 40952
2007-08-08 22:25:28 +00:00
Devang Patel
ed9b08c44f
Preserve dom info while processing one iteration loop.
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llvm-svn: 40947
2007-08-08 21:39:47 +00:00
Devang Patel
a74e533c5e
Clear split info.
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llvm-svn: 40944
2007-08-08 21:18:27 +00:00
Devang Patel
4bd07b86ae
Handle multiple split conditions.
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llvm-svn: 40941
2007-08-08 21:02:17 +00:00
Devang Patel
62f8bf41c3
Embrace patch review feedback.
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llvm-svn: 40915
2007-08-08 01:51:27 +00:00
Devang Patel
08504a95b0
Fix new compare instruction's signness. Caught by Chris during review.
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llvm-svn: 40912
2007-08-07 23:17:52 +00:00
Devang Patel
92d6834fd7
Use eraseFromParent().
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llvm-svn: 40903
2007-08-07 17:45:35 +00:00
Devang Patel
228dc09ff6
Begin loop index split pass.
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llvm-svn: 40883
2007-08-07 00:25:56 +00:00
