Commit Graph

120 Commits

Author SHA1 Message Date
3d2aa47bd3 Fix for 2006-06-26-MultipleExitsSingleBlock.
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
c2cc15cf9d Re-commit the safe parts of my 6/9 patch. Still working on fixing the unsafe parts.
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
b9b2b309d3 Back out Owen's 6/9 changes. They broke MultiSource/Benchmarks/Prolangs-C/bison (and perhaps others).
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
f25c19c6b5 Make Loop able to verify that it is in LCSSA-form, and have the LCSSA pass assert
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
a452932171 Update some comments, and expose LCSSAID in preparation for having other passes
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
e9d93d5d70 Fix some formatting, and use inLoop() when appropriate.
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
92deacf2f7 Stop a memory leak, and update some comments.
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
c14c1d472a Some more clean-up, and squash an IDF-Phi related bug.
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
9e1c1ddd4b Various clean-ups suggested by Chris.
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
30019c88f4 Fix a bug in Phi-noded insertion. Also, update some comments to reflect what's
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
ff99366919 Remove a FIXME that was fixed with my last patch.
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
2824da4738 More cleanups. Also, add a special case for updating PHI nodes, and
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
408a4061d8 Extract a huge loop into a helper method. Fix a few iterator-invalidation bugs.
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
00ea74c27e Add Use replacement. Assuming there is nothing horribly wrong with this, LCSSA
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
bd82277cbb Major think-o. Iterate over all live out-of-loop values, and perform the
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
2f21e07915 Make LCSSA insert proper Phi nodes throughout the rest of the CFG by computing
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
a90b2c7240 A few small clean-ups, and the addition of an LCSSA statistic.
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
fc3a3bc64b Fix a copy-and-paste-o that would break some compilers.
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
2480737211 Clean up and refactor LCSSA a bunch. It should also run faster now, though
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
11f510b577 Skeletal LCSSA pass. This is currently non-functional. Expect functionality
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