Evan Cheng
1b6e310e6f
Back out Owen's 6/9 changes. They broke MultiSource/Benchmarks/Prolangs-C/bison (and perhaps others).
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llvm-svn: 28747
2006-06-11 09:32:57 +00:00
Owen Anderson
505adff3f0
Make Loop able to verify that it is in LCSSA-form, and have the LCSSA pass assert
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on this.
llvm-svn: 28738
2006-06-09 18:33:30 +00:00
Owen Anderson
5d029264ec
Update some comments, and expose LCSSAID in preparation for having other passes
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require LCSSA.
llvm-svn: 28734
2006-06-08 20:02:53 +00:00
Owen Anderson
ac601b4c4b
Fix some formatting, and use inLoop() when appropriate.
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llvm-svn: 28694
2006-06-06 04:36:36 +00:00
Owen Anderson
9e81c1bb03
Stop a memory leak, and update some comments.
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llvm-svn: 28693
2006-06-06 04:28:30 +00:00
Owen Anderson
766f90b08e
Some more clean-up, and squash an IDF-Phi related bug.
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llvm-svn: 28680
2006-06-04 00:55:19 +00:00
Owen Anderson
eb33815f1b
Various clean-ups suggested by Chris.
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llvm-svn: 28678
2006-06-04 00:02:23 +00:00
Owen Anderson
d00eacc4f9
Fix a bug in Phi-noded insertion. Also, update some comments to reflect what's
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actually going on.
llvm-svn: 28677
2006-06-03 23:22:50 +00:00
Chris Lattner
02e0b4ddb7
Force anything that #includes llvm/Transforms/Utils/UnifyFunctionExitNodes.h
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to link in the implementation. Thanks to Anton Korobeynikov for figuring out
what was going on here.
llvm-svn: 28660
2006-06-02 18:40:06 +00:00
Chris Lattner
cdf2b1fc30
Remove dead #include
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llvm-svn: 28642
2006-06-01 20:02:28 +00:00
Chris Lattner
cc340c02a4
Make the "pruning cloner" smarter. As it propagates constants through the
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code (while cloning) it often gets the branch/switch instructions. Since it
knows that edges of the CFG are dead, it need not clone (or even look) at
the obviously dead blocks. This should speed up the inliner substantially on
code where there are lots of inlinable calls to functions with constant
arguments. On C++ code in particular, this kicks in.
llvm-svn: 28641
2006-06-01 19:19:23 +00:00
Owen Anderson
619e4ba57f
Remove a FIXME that was fixed with my last patch.
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llvm-svn: 28619
2006-06-01 06:07:40 +00:00
Owen Anderson
cd76fa04a1
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.
llvm-svn: 28618
2006-06-01 06:05:47 +00:00
Owen Anderson
dad8c57340
Extract a huge loop into a helper method. Fix a few iterator-invalidation bugs.
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llvm-svn: 28599
2006-05-31 20:55:06 +00:00
Owen Anderson
8a8f278f15
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.
llvm-svn: 28529
2006-05-29 01:00:00 +00:00
Owen Anderson
152d063ccb
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.
llvm-svn: 28527
2006-05-28 19:33:28 +00:00
Owen Anderson
1310e42803
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.
llvm-svn: 28524
2006-05-27 18:47:11 +00:00
Chris Lattner
67c424e010
Fix some regression from the inliner patch I committed last night. This fixes
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ldecod, lencod, and SPASS.
llvm-svn: 28523
2006-05-27 17:28:13 +00:00
Chris Lattner
be853d77e9
Switch the inliner over to using CloneAndPruneFunctionInto. This effectively
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makes it so that it constant folds instructions on the fly. This is good
for several reasons:
0. Many instructions are constant foldable after inlining, particularly if
inlining a call with constant arguments.
1. Without this, the inliner has to allocate memory for all of the instructions
that can be constant folded, then a subsequent pass has to delete them. This
gets the job done without this extra work.
2. This makes the inliner *pass* a bit more aggressive: in particular, it
partially solves a phase order issue where the inliner would inline lots
of code that folds away to nothing, but think that the resultant function
is big because of this code that will be gone. Now the code never exists.
This is the first part of a 2-step process. The second part will be smart
enough to see when this implicit constant folding propagates a constant into
a branch or switch instruction, making CFG edges dead.
This implements Transforms/Inline/inline_constprop.ll
llvm-svn: 28521
2006-05-27 01:28:04 +00:00
Chris Lattner
3df13f4f22
Implement a new method, CloneAndPruneFunctionInto, as documented.
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llvm-svn: 28519
2006-05-27 01:22:24 +00:00
Chris Lattner
bc3c879fcf
Refactor some code to expose an interface to constant fold and instruction given it's opcode, typeand operands.
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llvm-svn: 28517
2006-05-27 01:18:04 +00:00
Owen Anderson
b4e16996f1
A few small clean-ups, and the addition of an LCSSA statistic.
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llvm-svn: 28512
2006-05-27 00:31:37 +00:00
Owen Anderson
6e047ab8fc
Fix a copy-and-paste-o that would break some compilers.
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llvm-svn: 28507
2006-05-26 21:19:17 +00:00
Owen Anderson
f3dd3e2bfd
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.
llvm-svn: 28506
2006-05-26 21:11:53 +00:00
Owen Anderson
8eca8910b6
Skeletal LCSSA pass. This is currently non-functional. Expect functionality
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and documentation updates soo.
llvm-svn: 28495
2006-05-26 13:58:26 +00:00
Chris Lattner
0853700582
Revert a patch that is unsafe, due to out of range array accesses in inner
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array scopes possibly accessing valid memory in outer subscripts.
llvm-svn: 28478
2006-05-25 21:25:12 +00:00
Chris Lattner
a643d528bd
Patch for a new instcombine xform, patch contributed by Nick Lewycky!
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This implements Transforms/InstCombine/2006-05-10-InvalidIndexUndef.ll
llvm-svn: 28450
2006-05-24 17:34:30 +00:00
Reid Spencer
2452c94df4
Fix a doxygen problem and break lines at 80 columns
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llvm-svn: 28395
2006-05-19 19:09:46 +00:00
Chris Lattner
2e266807c3
Add a CloneModule call that exposes the mapping of values from the old module
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to the new module. Patch provided by Nick Lewycky!
llvm-svn: 28349
2006-05-17 18:05:35 +00:00
Chris Lattner
35515557c7
remove some dead code identified by coverity
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llvm-svn: 28289
2006-05-14 18:45:44 +00:00
Chris Lattner
3237da073e
remove dead variables
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llvm-svn: 28286
2006-05-14 18:33:57 +00:00
Chris Lattner
4fe87d67c4
Patch to make some xforms preserve each other. Patch contributed by
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Domagoj Babic!
llvm-svn: 28181
2006-05-09 04:13:41 +00:00
Chris Lattner
f98b4aa2e7
Fix some nondeterminstic behavior in the mem2reg pass that (in addition to
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nondeterminism being bad) could cause some trivial missed optimizations (dead
phi nodes being left around for later passes to clean up).
With this, llvm-gcc4 now bootstraps and correctly compares. I don't know
why I never tried to do it before... :)
llvm-svn: 27984
2006-04-27 01:14:43 +00:00
Chris Lattner
17bd60588c
Add supprot for shufflevector
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llvm-svn: 27513
2006-04-08 01:19:12 +00:00
Chris Lattner
8ec0205de4
Fix inlining of insert/extract element constantexprs
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llvm-svn: 27478
2006-04-07 04:41:03 +00:00
Chris Lattner
70ec96fa32
Adjust to change in Intrinsics.gen interface.
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llvm-svn: 27344
2006-04-02 03:35:01 +00:00
Chris Lattner
1b2436a624
add valuemapper support for inline asm
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llvm-svn: 27332
2006-04-01 23:17:11 +00:00
Chris Lattner
42e0ba09aa
teach the inliner to work with packed constants
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llvm-svn: 27161
2006-03-27 05:50:18 +00:00
Chris Lattner
60f6833376
use autogenerated side-effect information
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llvm-svn: 26673
2006-03-09 22:38:10 +00:00
Chris Lattner
d95665188b
Fix Transforms/SimplifyCFG/2006-02-17-InfiniteUnroll.ll
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llvm-svn: 26275
2006-02-18 00:33:17 +00:00
Chris Lattner
9c5693fb2a
Canonicalize inner loops before outer loops. Inner loop canonicalization
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can provide work for the outer loop to canonicalize.
This fixes a case that breaks unswitching.
llvm-svn: 26189
2006-02-14 23:06:02 +00:00
Chris Lattner
cffbbee8d1
When splitting exit edges to canonicalize loops, make sure to put the new
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block in the appropriate loop nest.
Third time is the charm, right?
llvm-svn: 26187
2006-02-14 22:34:08 +00:00
Chris Lattner
02f53ad3a2
Revert my last patch. It too breaks stuff
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llvm-svn: 26128
2006-02-12 01:59:10 +00:00
Chris Lattner
35248e06bc
Fix for my previously reverted patch
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llvm-svn: 26126
2006-02-11 21:24:54 +00:00
Chris Lattner
b24ce3a2a8
revert my previous change, it exposed other problems.
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llvm-svn: 26121
2006-02-11 08:47:47 +00:00
Chris Lattner
05bf90dddf
Make this check stricter. Disallow loop exit blocks from being shared by
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loops and their subloops.
llvm-svn: 26118
2006-02-11 02:13:17 +00:00
Chris Lattner
a6ae101afa
remove dead expr
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llvm-svn: 26116
2006-02-11 01:43:37 +00:00
Chris Lattner
120f31b1fd
teach the cloner to handle inline asms
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llvm-svn: 25633
2006-01-26 01:55:22 +00:00
Chris Lattner
00fcdfef0d
rename method
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llvm-svn: 25572
2006-01-24 04:16:34 +00:00
Chris Lattner
37992b34c2
When cloning a module, clone the inline asm.
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llvm-svn: 25559
2006-01-23 23:06:28 +00:00