Owen Anderson
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cfb6f40424
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Quick patch to fix the build, based on what it appears Evan meant to write.
Evan, please check that this is in fact correct.
llvm-svn: 37471
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2007-06-06 16:22:00 +00:00 |
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Evan Cheng
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9030b98aca
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Lots of bug fixes.
llvm-svn: 37467
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2007-06-06 10:16:17 +00:00 |
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Evan Cheng
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e4ec918be0
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If a unconditional branch is added to branch to the false path during ifcvt, the predicated block cannot be iteratively ifcvted.
llvm-svn: 37456
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2007-06-06 02:08:52 +00:00 |
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Evan Cheng
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b30a89457c
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Minor statistics counting bug.
llvm-svn: 37451
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2007-06-06 01:12:44 +00:00 |
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Evan Cheng
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30565998bb
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Fix a couple of typos and be smarter about order of blocks when ifcvt a diamond.
llvm-svn: 37449
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2007-06-06 00:57:55 +00:00 |
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Evan Cheng
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7948422b78
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Fix diamond shape ifcvt bugs.
llvm-svn: 37444
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2007-06-05 23:46:14 +00:00 |
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Evan Cheng
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c1a0b8ce1d
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ReplaceUsesOfBlockWith() can modify the predecessors list.
llvm-svn: 37441
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2007-06-05 22:03:53 +00:00 |
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Evan Cheng
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3e5bf0827c
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Do not ifcvt if either true / false path is a backedge. Not profitable in almost all cases.
llvm-svn: 37440
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2007-06-05 20:38:42 +00:00 |
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Evan Cheng
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2c1acd6d9e
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I had a senior moment.
llvm-svn: 37433
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2007-06-05 07:05:25 +00:00 |
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Evan Cheng
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6e4babe8cc
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If the predicated block requires an early exit, end the block there and add a unconditional branch to false block. AnalyzeBranch() does not understand early exits.
llvm-svn: 37430
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2007-06-05 01:31:40 +00:00 |
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Evan Cheng
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17aad8164e
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Fix some subtle bugs: bug during succeessor copying; incorrectly updating states of ifcvted blocks.
llvm-svn: 37429
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2007-06-05 00:07:37 +00:00 |
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Evan Cheng
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91233153bf
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Forgot to check for if iterator reached the end.
llvm-svn: 37420
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2007-06-04 20:33:36 +00:00 |
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Evan Cheng
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312b723af2
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Let IfConverter loose. Allow more aggressive subsumptions; reorder basic blocks to expose more ifcvt opportunities; code clean up and fixes.
llvm-svn: 37409
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2007-06-04 06:47:22 +00:00 |
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Evan Cheng
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4dcf1e8582
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Correctly mark early-exit on the false path.
llvm-svn: 37387
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2007-06-01 20:29:21 +00:00 |
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Evan Cheng
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6a2cf070cc
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Ifcvt triangle: don't ifcvt 'true' BB if it has other predecessors; don't merge 'false' BB if it has other predecessors.
llvm-svn: 37382
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2007-06-01 07:41:07 +00:00 |
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Evan Cheng
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95c7917d92
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Remove a bogus check. Even terminators in a ifcvt need to be predicated. Unconditional branches can usually be converted to conditional ones.
llvm-svn: 37380
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2007-06-01 00:55:26 +00:00 |
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Evan Cheng
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20e05997f5
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Allow multiple ifcvt candidates to share children blocks; add some debugging code.
llvm-svn: 37379
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2007-06-01 00:12:12 +00:00 |
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Evan Cheng
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e6ccb6c5ed
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Fix a typo.
llvm-svn: 37374
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2007-05-31 20:53:33 +00:00 |
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Evan Cheng
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905a8f4940
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Change traversal order to bottom up in preparation for more aggressive if-conversion.
llvm-svn: 37365
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2007-05-30 19:49:19 +00:00 |
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Evan Cheng
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20f7d30f92
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Don't merge in tail block of a diamond if it has more than one predecessors after if-conversion.
llvm-svn: 37353
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2007-05-29 23:37:20 +00:00 |
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Evan Cheng
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c2237ce217
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If there is an empty block between a source and its successor block, it still requires a unconditional branch.
llvm-svn: 37344
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2007-05-29 22:31:16 +00:00 |
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Evan Cheng
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13f5f7df95
|
Silly boog.
llvm-svn: 37328
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2007-05-25 00:59:01 +00:00 |
|
Evan Cheng
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d0e669199b
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Preliminary iterative if-conversion support.
llvm-svn: 37309
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2007-05-23 07:23:16 +00:00 |
|
Evan Cheng
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e26c0916a3
|
If-convert early exit blocks (returns, etc.); bug fixes, etc.
llvm-svn: 37270
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2007-05-21 22:22:58 +00:00 |
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Evan Cheng
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018cffbca4
|
Clean up.
llvm-svn: 37237
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2007-05-18 19:32:08 +00:00 |
|
Evan Cheng
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faaf716540
|
Change to depth-first traversal.
llvm-svn: 37236
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2007-05-18 19:26:33 +00:00 |
|
Evan Cheng
|
2e82cefd24
|
Some restructuring in preparation for most aggressive if-conversion.
llvm-svn: 37231
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2007-05-18 18:14:37 +00:00 |
|
Evan Cheng
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f25d3a5d73
|
Watch out for blocks that end with a return.
llvm-svn: 37227
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2007-05-18 17:06:53 +00:00 |
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Evan Cheng
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478b805956
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If true / false blocks fallthrough before ifcvt, add unconditional branches to ifcvt'd block.
llvm-svn: 37200
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2007-05-18 01:55:58 +00:00 |
|
Evan Cheng
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0f745da4fe
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Make use of target specific block size limits; bug fixes.
llvm-svn: 37195
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2007-05-18 00:20:58 +00:00 |
|
Evan Cheng
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af71610429
|
isBlockPredicable() always ignore terminal instructions; add comments.
llvm-svn: 37126
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2007-05-16 21:54:37 +00:00 |
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Evan Cheng
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5ea933a009
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Rename M_PREDICATED to M_PREDICABLE; Moved isPredicable() to MachineInstr.
llvm-svn: 37121
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2007-05-16 20:56:08 +00:00 |
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Evan Cheng
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35fc2119b0
|
Devang points out that we need an assertion here.
llvm-svn: 37097
|
2007-05-16 05:11:10 +00:00 |
|
Evan Cheng
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f5e53a58db
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Initial commit of (very basic) if converter.
llvm-svn: 37092
|
2007-05-16 02:00:57 +00:00 |
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