Owen Anderson
3d2aa47bd3
Fix for 2006-06-26-MultipleExitsSingleBlock.
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If a single exit block has multiple predecessors within the loop, it will
appear in the exit blocks list more than once. LCSSA needs to take that into
account so that it doesn't double process that exit block.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28750 91177308-0d34-0410-b5e6-96231b3b80d8
2006-06-12 07:10:16 +00:00
Owen Anderson
c2cc15cf9d
Re-commit the safe parts of my 6/9 patch. Still working on fixing the unsafe parts.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28748 91177308-0d34-0410-b5e6-96231b3b80d8
2006-06-11 19:22:28 +00:00
Evan Cheng
b9b2b309d3
Back out Owen's 6/9 changes. They broke MultiSource/Benchmarks/Prolangs-C/bison (and perhaps others).
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28747 91177308-0d34-0410-b5e6-96231b3b80d8
2006-06-11 09:32:57 +00:00
Owen Anderson
f25c19c6b5
Make Loop able to verify that it is in LCSSA-form, and have the LCSSA pass assert
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on this.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28738 91177308-0d34-0410-b5e6-96231b3b80d8
2006-06-09 18:33:30 +00:00
Owen Anderson
a452932171
Update some comments, and expose LCSSAID in preparation for having other passes
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require LCSSA.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28734 91177308-0d34-0410-b5e6-96231b3b80d8
2006-06-08 20:02:53 +00:00
Owen Anderson
e9d93d5d70
Fix some formatting, and use inLoop() when appropriate.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28694 91177308-0d34-0410-b5e6-96231b3b80d8
2006-06-06 04:36:36 +00:00
Owen Anderson
92deacf2f7
Stop a memory leak, and update some comments.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28693 91177308-0d34-0410-b5e6-96231b3b80d8
2006-06-06 04:28:30 +00:00
Owen Anderson
c14c1d472a
Some more clean-up, and squash an IDF-Phi related bug.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28680 91177308-0d34-0410-b5e6-96231b3b80d8
2006-06-04 00:55:19 +00:00
Owen Anderson
9e1c1ddd4b
Various clean-ups suggested by Chris.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28678 91177308-0d34-0410-b5e6-96231b3b80d8
2006-06-04 00:02:23 +00:00
Owen Anderson
30019c88f4
Fix a bug in Phi-noded insertion. Also, update some comments to reflect what's
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actually going on.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28677 91177308-0d34-0410-b5e6-96231b3b80d8
2006-06-03 23:22:50 +00:00
Owen Anderson
ff99366919
Remove a FIXME that was fixed with my last patch.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28619 91177308-0d34-0410-b5e6-96231b3b80d8
2006-06-01 06:07:40 +00:00
Owen Anderson
2824da4738
More cleanups. Also, add a special case for updating PHI nodes, and
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reimplement getValueDominatingFunction to walk the DominanceTree rather than
just searching blindly.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28618 91177308-0d34-0410-b5e6-96231b3b80d8
2006-06-01 06:05:47 +00:00
Owen Anderson
408a4061d8
Extract a huge loop into a helper method. Fix a few iterator-invalidation bugs.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28599 91177308-0d34-0410-b5e6-96231b3b80d8
2006-05-31 20:55:06 +00:00
Owen Anderson
00ea74c27e
Add Use replacement. Assuming there is nothing horribly wrong with this, LCSSA
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is now theoretically feature-complete. It has not, however, been thoroughly
test, and is still considered experimental.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28529 91177308-0d34-0410-b5e6-96231b3b80d8
2006-05-29 01:00:00 +00:00
Owen Anderson
bd82277cbb
Major think-o. Iterate over all live out-of-loop values, and perform the
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other calculations on each individually, rather than trying to delay it and do
them all at the end.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28527 91177308-0d34-0410-b5e6-96231b3b80d8
2006-05-28 19:33:28 +00:00
Owen Anderson
2f21e07915
Make LCSSA insert proper Phi nodes throughout the rest of the CFG by computing
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the iterated Dominance Frontier of the loop-closure Phi's. This is the
second phase of the LCSSA pass. The third phase (coming soon) will be to
update all uses of loop variables to use the loop-closure Phi's instead.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28524 91177308-0d34-0410-b5e6-96231b3b80d8
2006-05-27 18:47:11 +00:00
Owen Anderson
a90b2c7240
A few small clean-ups, and the addition of an LCSSA statistic.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28512 91177308-0d34-0410-b5e6-96231b3b80d8
2006-05-27 00:31:37 +00:00
Owen Anderson
fc3a3bc64b
Fix a copy-and-paste-o that would break some compilers.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28507 91177308-0d34-0410-b5e6-96231b3b80d8
2006-05-26 21:19:17 +00:00
Owen Anderson
2480737211
Clean up and refactor LCSSA a bunch. It should also run faster now, though
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there's still a lot of work to be done on it.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28506 91177308-0d34-0410-b5e6-96231b3b80d8
2006-05-26 21:11:53 +00:00
Owen Anderson
11f510b577
Skeletal LCSSA pass. This is currently non-functional. Expect functionality
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and documentation updates soo.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28495 91177308-0d34-0410-b5e6-96231b3b80d8
2006-05-26 13:58:26 +00:00