Commit Graph

3357 Commits

Author SHA1 Message Date
Chris Lattner 3bbec59e8b refactor a bunch of code out of visitICmpInstWithInstAndIntCst into its own
routine.

llvm-svn: 37679
2007-06-20 23:46:26 +00:00
Owen Anderson 06c1e585c9 Split runOnFunction into many smaller functions. This make it easier to get accurate performance analysis of GVNPRE.
llvm-svn: 37678
2007-06-20 22:10:02 +00:00
Owen Anderson b0714bb7bb Make GVNPRE accurate report whether it modified the function or not.
llvm-svn: 37673
2007-06-20 18:30:20 +00:00
Owen Anderson 7b0fb44ca9 Get rid of an unneeded helper function.
llvm-svn: 37670
2007-06-20 00:43:33 +00:00
Owen Anderson 1ad2c10215 Use a DenseMap instead of an std::map for the value numbering. This reduces the time to optimize lencod on a PPC Debug build from ~300s to ~140s.
llvm-svn: 37668
2007-06-19 23:23:54 +00:00
Owen Anderson 2320d430bd Make dependsOnInvoke much more specific in what it tests, which in turn make it much faster to run. This reduces the time to optimize lencondwith a debug build on PPC from ~450s to ~300s.
llvm-svn: 37667
2007-06-19 23:07:16 +00:00
Tanya Lattner c655839d71 Moved Inliner.h to include/llvm/Transforms/IPO/InlinerPass.h
llvm-svn: 37666
2007-06-19 22:31:52 +00:00
Tanya Lattner ab11b1c702 Inliner pass header file was moved.
llvm-svn: 37665
2007-06-19 22:29:50 +00:00
Dan Gohman 32f53bbd85 Rename ScalarEvolution::deleteInstructionFromRecords to
deleteValueFromRecords and loosen the types to all it to accept
Value* instead of just Instruction*, since this is what
ScalarEvolution uses internally anyway. This allows more flexibility
for future uses.

llvm-svn: 37657
2007-06-19 14:28:31 +00:00
Owen Anderson 1370faf889 Handle constants in phi nodes properly. This fixes test/Transforms/GVNPRE/2007-06-18-ConstantInPhi.ll
llvm-svn: 37655
2007-06-19 07:35:36 +00:00
Chris Lattner 09a33a4f64 silence a bogus warning Duraid ran into.
llvm-svn: 37649
2007-06-19 05:43:49 +00:00
Owen Anderson 91c54950b3 Be careful to erase values from all of the appropriate sets when they're not needed anymore. This fixes a few more memory-related issues.
llvm-svn: 37647
2007-06-19 05:37:32 +00:00
Owen Anderson b9cbaed623 Remember to clear the maximal sets between functions.
Thanks to Nicholas for valgrinding this.

llvm-svn: 37646
2007-06-19 04:32:55 +00:00
Owen Anderson b56fba0c5a Refactor GVNPRE to use a much smart method of uniquing value sets, and centralize a lot of the value numbering information. No functionality change.
llvm-svn: 37645
2007-06-19 03:31:41 +00:00
Owen Anderson dd998e1913 Cache the results of dependsOnInvoke()
llvm-svn: 37622
2007-06-18 04:42:29 +00:00
Owen Anderson f1c04e1ddb Fix indentation.
llvm-svn: 37621
2007-06-18 04:31:21 +00:00
Owen Anderson b364b413af Don't perform an expensive check if it's not necessary.
llvm-svn: 37620
2007-06-18 04:30:44 +00:00
Owen Anderson 658f2c4881 Fix test/Transforms/GVNPRE/2007-06-15-InvokeInst.ll by ignoring all instructions that depend on invokes.
llvm-svn: 37610
2007-06-16 00:26:54 +00:00
Dan Gohman 203a035251 Use SCEVConstant::get instead of SCEVUnknown::get to create an
integer constant SCEV.

llvm-svn: 37596
2007-06-15 18:00:55 +00:00
Owen Anderson acaed06827 Fix test/Transforms/GVNPRE/2007-06-15-Looping.ll
llvm-svn: 37595
2007-06-15 17:55:15 +00:00
Dan Gohman cb9e09ad57 Add a SCEV class and supporting code for sign-extend expressions.
This created an ambiguity for expandInTy to decide when to use
sign-extension or zero-extension, but it turns out that most of its callers
don't actually need a type conversion, now that LLVM types don't have
explicit signedness. Drop expandInTy in favor of plain expand, and change
the few places that actually need a type conversion to do it themselves.

llvm-svn: 37591
2007-06-15 14:38:12 +00:00
Chris Lattner 373389260f Generalize many transforms to work on ~ of vectors in addition to ~ of
integer ops.  This implements Transforms/InstCombine/and-or-not.ll
test3/test4, and finishes off PR1510

llvm-svn: 37589
2007-06-15 06:23:19 +00:00
Chris Lattner 481e28b1f5 Implement two xforms:
1. ~(~X | Y) === (X & ~Y)
2. (A|B) & ~(A&B) -> A^B

This allows us to transform  ~(~(a|b) | (a&b)) -> a^b.

This implements PR1510 for scalar values.

llvm-svn: 37584
2007-06-15 05:58:24 +00:00
Chris Lattner f14e5175ed delete some obviously dead vector operations, which deletes a few thousand
operations from Duraids example.

llvm-svn: 37582
2007-06-15 05:26:55 +00:00
Owen Anderson 4036ad485f Fix test/Transforms/GVNPRE/2007-06-12-PhiTranslate.ll
llvm-svn: 37564
2007-06-12 22:43:57 +00:00
Owen Anderson 4276984012 Refactor some code, and fix test/Transforms/GVNPRE/2007-06-12-NoExit.ll by being more careful when using
post-dominator information.

llvm-svn: 37556
2007-06-12 16:57:50 +00:00
Dale Johannesen edfec0b515 Sink CmpInst's to their uses to reduce register pressure.
llvm-svn: 37554
2007-06-12 16:50:17 +00:00
Owen Anderson a75dd4dc56 Fix a few more bugs, including an instance of walking in reverse topological rather than topological order. This
fixes a testcase extracted from llvm-test.

llvm-svn: 37550
2007-06-12 00:50:47 +00:00
Devang Patel 78b9c68164 Add and use DominatorTreeBase::findNearestCommonDominator().
llvm-svn: 37545
2007-06-11 23:31:22 +00:00
Devang Patel 536ac4dca7 Simplify.
llvm-svn: 37542
2007-06-11 21:45:31 +00:00
Devang Patel d18054afcf simplify
llvm-svn: 37541
2007-06-11 21:25:31 +00:00
Devang Patel ab2eee89a4 Simplify. Dominator Tree is required so always available.
llvm-svn: 37540
2007-06-11 21:18:00 +00:00
Owen Anderson d184c18074 Handle functions with multiple exit blocks properly.
llvm-svn: 37539
2007-06-11 16:25:17 +00:00
Owen Anderson 223718c40e Perform PRE of comparison operators.
llvm-svn: 37536
2007-06-09 18:35:31 +00:00
Owen Anderson 7d76b2a774 Collect statistics from GVN-PRE.
llvm-svn: 37530
2007-06-08 22:02:36 +00:00
Owen Anderson b232efaf48 Fix typo in a comment.
llvm-svn: 37526
2007-06-08 20:57:08 +00:00
Owen Anderson 55994f2453 Fix a bug that was causing the elimination phase not to replace values when it should be.
With this patch, GVN-PRE now correctly optimizes the example from the thesis.

Many thanks to Daniel Berlin for helping me find errors in this.

llvm-svn: 37525
2007-06-08 20:44:02 +00:00
Owen Anderson 2e5efc30c2 Small bugfix, and const-ify some methods (Thanks, Bill).
llvm-svn: 37513
2007-06-08 01:52:45 +00:00
Devang Patel becc466451 Update LoopSimplify to require and preserve DominatorTree only.
Now LoopSimplify does not require nor preserve ETForest.

llvm-svn: 37512
2007-06-08 01:50:32 +00:00
Owen Anderson be80240b29 Add partial redundancy elimination.
llvm-svn: 37510
2007-06-08 01:03:01 +00:00
Devang Patel 8ecffa996a Do not preserve ETForest.
llvm-svn: 37506
2007-06-08 00:02:08 +00:00
Devang Patel 3f4c6fe7e8 Do not require ETForest. Now it is unused by LICM.
llvm-svn: 37502
2007-06-07 22:21:15 +00:00
Devang Patel cf470e5255 Do not use ETForest as well as DomiantorTree. DominatorTree is sufficient.
llvm-svn: 37501
2007-06-07 22:17:16 +00:00
Devang Patel fc7fdef7d2 Use DominatorTree instead of ETForest.
This allows faster immediate domiantor walk.

llvm-svn: 37500
2007-06-07 21:57:03 +00:00
Devang Patel df6355ccf8 Use DominatorTree instead of ETForest.
llvm-svn: 37499
2007-06-07 21:42:15 +00:00
Devang Patel fb582f8dda Use DominatorTree instead of ETForest.
llvm-svn: 37498
2007-06-07 21:35:27 +00:00
Devang Patel 5b8a5516e4 Use DominatorTree instead of ETForest.
llvm-svn: 37495
2007-06-07 18:45:06 +00:00
Devang Patel 593e766fb5 Use DominatorTree instead of ETForest.
llvm-svn: 37494
2007-06-07 18:40:55 +00:00
Devang Patel af41e4a192 Maintain ETNode as part of DomTreeNode.
This adds redundancy for now.

llvm-svn: 37492
2007-06-07 17:47:21 +00:00
Tanya Lattner 5801c23e05 Formating fixes.
llvm-svn: 37491
2007-06-07 17:12:16 +00:00
Tanya Lattner cb90f1d881 Instruct the inliner to obey the noinline attribute. Add test case.
llvm-svn: 37481
2007-06-06 21:59:26 +00:00
Chris Lattner 34404e3247 simplify this code and fix PR1493, now that llvm-gcc3 is dead.
llvm-svn: 37478
2007-06-06 20:51:41 +00:00
Lauro Ramos Venancio 368e8872db Fix PR1499.
llvm-svn: 37472
2007-06-06 17:08:48 +00:00
Nick Lewycky 91ed6efc24 Inform ScalarEvolutions that we're deleting Values.
This is the obviously correct part of the fix for PR1487.

llvm-svn: 37457
2007-06-06 03:51:56 +00:00
Owen Anderson 634a063c1d Add simple full redundancy elimination.
llvm-svn: 37455
2007-06-06 01:27:49 +00:00
Chris Lattner 1b7b6e76ec Fix PR1495 and CodeGen/X86/2007-06-05-LSR-Dominator.ll
llvm-svn: 37454
2007-06-06 01:23:55 +00:00
Devang Patel 506310d3dd Avoid non-trivial loop unswitching while optimizing for size.
llvm-svn: 37446
2007-06-06 00:21:03 +00:00
Owen Anderson ddbe430732 Fix a misunderstanding of the algorithm. Really, we should be tracking values
and expression separately.  We can get around this, however, by only keeping
opaque values in TMP_GEN.

llvm-svn: 37443
2007-06-05 23:46:12 +00:00
Owen Anderson c84720913a Don't leak memory.
llvm-svn: 37442
2007-06-05 22:11:49 +00:00
Owen Anderson 9b89e4b561 Fix a small bug, some 80 cols violations, and add some more debugging output.
llvm-svn: 37436
2007-06-05 17:31:23 +00:00
Dan Gohman 151169df1e Allow insertelement, extractelement, and shufflevector to be hoisted/sunk
by LICM.

llvm-svn: 37435
2007-06-05 16:05:55 +00:00
Bill Wendling 6357bf20fa Patches by Chuck Rose to unbreak V Studio builds.
Thanks Chuck!

llvm-svn: 37428
2007-06-04 23:52:59 +00:00
Devang Patel b3adb9876a s/ETNode::getChildren/ETNode::getETNodeChildren/g
llvm-svn: 37426
2007-06-04 23:45:02 +00:00
Owen Anderson 3c9d8eef21 Don't use std::set_difference when the two sets are sorted differently. Compute
the difference manually instead.

This allows GVNPRE to produce correct analysis for the example in the GVNPRE
paper.

llvm-svn: 37425
2007-06-04 23:34:56 +00:00
Owen Anderson 3df5299f94 Fix a bunch of small bugs, and improve the debugging output significantly.
llvm-svn: 37424
2007-06-04 23:28:33 +00:00
Chris Lattner d7897d40b6 When rebuilding constant structs, make sure to honor the isPacked bit.
This fixes PR1491 and GlobalOpt/2007-06-04-PackedStruct.ll

llvm-svn: 37423
2007-06-04 22:23:42 +00:00
Owen Anderson 38b6b22a41 Make phi_translate correct.
llvm-svn: 37418
2007-06-04 18:05:26 +00:00
Devang Patel ebc5b96735 s/DominatorTree::createNewNode/DominatorTree::addNewBlock/g
llvm-svn: 37415
2007-06-04 16:43:25 +00:00
Devang Patel a89566aefd Add basic block level interface to change immediate dominator
and create new node.

llvm-svn: 37414
2007-06-04 16:22:33 +00:00
Devang Patel bdd1aaef10 s/llvm::DominatorTreeBase::DomTreeNode/llvm::DomTreeNode/g
llvm-svn: 37407
2007-06-04 00:32:22 +00:00
Owen Anderson 0eca9aad10 Don't use the custom comparator where it's not necessary.
llvm-svn: 37406
2007-06-03 22:02:14 +00:00
Devang Patel 0e8aa7b69a s/DominatorTreeBase::Node/DominatorTreeBase:DomTreeNode/g
llvm-svn: 37403
2007-06-03 06:26:14 +00:00
Owen Anderson 46499645db Remove an unused method.
llvm-svn: 37402
2007-06-03 05:58:25 +00:00
Owen Anderson 0b68cda302 There's no need to have an Expression class... Value works just as well! This simplifies a lot of code.
llvm-svn: 37401
2007-06-03 05:55:58 +00:00
Devang Patel ac54a62fd2 Insert new instructions in AliasSet.
llvm-svn: 37390
2007-06-01 22:15:31 +00:00
Owen Anderson 48e93f2ce9 clean() needs to process things in topological order.
llvm-svn: 37389
2007-06-01 22:00:37 +00:00
Owen Anderson 4c89142466 Fix Expression comparison, which in turn fixes a value numbering error.
llvm-svn: 37386
2007-06-01 17:34:47 +00:00
Owen Anderson 331bf6a959 Add a topological sort function.
llvm-svn: 37376
2007-05-31 22:44:11 +00:00
Owen Anderson 81d156e16f Attempt to fix up phi_translate.
llvm-svn: 37366
2007-05-31 00:42:15 +00:00
Devang Patel 9b3b35d14f Fix typo.
llvm-svn: 37360
2007-05-30 15:29:37 +00:00
Chris Lattner 8767920f20 Fix Transforms/ScalarRepl/2007-05-29-MemcpyPreserve.ll and the second
half of PR1421, by not decimating structs with holes that are the source and
destination of a memcpy.

llvm-svn: 37358
2007-05-30 06:11:23 +00:00
Owen Anderson 4b0c1859fd Fix a typo
llvm-svn: 37350
2007-05-29 23:34:14 +00:00
Owen Anderson 0c4230724c Re-fix a bug, where I was now being too aggressive.
llvm-svn: 37348
2007-05-29 23:26:30 +00:00
Owen Anderson 4a6ec8fb57 Use proper debugging facilities so other people don't have to look at my commented-out
debugging lines.

llvm-svn: 37347
2007-05-29 23:15:21 +00:00
Owen Anderson f11bdc7637 Comment debug code out that I accidentally uncommented last time.
llvm-svn: 37346
2007-05-29 22:43:03 +00:00
Owen Anderson ac83a3e4ff Add a place where I missed using the maximal set. Note that using the maximal
set this way is _SLOW_.  Somewhere down the line, I'll look at speeding it up.

llvm-svn: 37345
2007-05-29 22:35:41 +00:00
Owen Anderson 5fba6c19b2 Very first part of a GVN-PRE implementation. It currently performs a bunch of analysis, and nothing more. It is also quite slow for the moment. However,
it should give a sense of what's going on.

llvm-svn: 37343
2007-05-29 21:53:49 +00:00
Chris Lattner 80c94a4a04 Fix PR1446 by not scalarrepl'ing giant structures.
llvm-svn: 37326
2007-05-24 18:43:04 +00:00
Dan Gohman 30978078bf Minor comment cleanups.
llvm-svn: 37321
2007-05-24 14:36:04 +00:00
Chris Lattner f79577d314 fix a miscompilation when passing a float through varargs
llvm-svn: 37297
2007-05-23 01:17:04 +00:00
Chris Lattner a655a157a0 Fix Transforms/InstCombine/2007-05-18-CastFoldBug.ll, a bug that devastates
objc code due to the way the FE lowers objc message sends.

llvm-svn: 37256
2007-05-19 06:51:32 +00:00
Chris Lattner e8bd53c36a Handle negative strides much more optimally. This compiles X86/lsr-negative-stride.ll
into:

_t:
        movl 8(%esp), %ecx
        movl 4(%esp), %eax
        cmpl %ecx, %eax
        je LBB1_3       #bb17
LBB1_1: #bb
        cmpl %ecx, %eax
        jg LBB1_4       #cond_true
LBB1_2: #cond_false
        subl %eax, %ecx
        cmpl %ecx, %eax
        jne LBB1_1      #bb
LBB1_3: #bb17
        ret
LBB1_4: #cond_true
        subl %ecx, %eax
        cmpl %ecx, %eax
        jne LBB1_1      #bb
        jmp LBB1_3      #bb17

instead of:

_t:
        subl $4, %esp
        movl %esi, (%esp)
        movl 12(%esp), %ecx
        movl 8(%esp), %eax
        cmpl %ecx, %eax
        je LBB1_4       #bb17
LBB1_1: #bb.outer
        movl %ecx, %edx
        negl %edx
LBB1_2: #bb
        cmpl %ecx, %eax
        jle LBB1_5      #cond_false
LBB1_3: #cond_true
        addl %edx, %eax
        cmpl %ecx, %eax
        jne LBB1_2      #bb
LBB1_4: #bb17
        movl (%esp), %esi
        addl $4, %esp
        ret
LBB1_5: #cond_false
        movl %ecx, %edx
        subl %eax, %edx
        movl %eax, %esi
        addl %esi, %esi
        cmpl %ecx, %esi
        je LBB1_4       #bb17
LBB1_6: #cond_false.bb.outer_crit_edge
        movl %edx, %ecx
        jmp LBB1_1      #bb.outer

llvm-svn: 37252
2007-05-19 01:22:21 +00:00
Devang Patel 2c30a37a5c Fix PR1431
Test case at Transformations/SCCP/2007-05-16-InvokeCrash.ll

llvm-svn: 37185
2007-05-17 22:10:15 +00:00
Chris Lattner 66ad6fac2f selects can also reach here
llvm-svn: 37081
2007-05-15 06:42:04 +00:00
Chris Lattner 234f96daa8 Fix Transforms/InstCombine/2007-05-14-Crash.ll
llvm-svn: 37057
2007-05-15 00:16:00 +00:00
Dan Gohman 8d40e4d965 Correct a few comments.
llvm-svn: 37034
2007-05-14 14:31:17 +00:00
Chris Lattner cea37beb52 Fix Transforms/GlobalOpt/2007-05-13-Crash.ll
llvm-svn: 37020
2007-05-13 21:28:07 +00:00
Chris Lattner 1480e16596 significantly improve debug output of lsr
llvm-svn: 36996
2007-05-11 22:40:34 +00:00
Dan Gohman b5650ebd6a Fix typos.
llvm-svn: 36994
2007-05-11 21:10:54 +00:00
Dan Gohman 2980d9da45 This patch extends the LoopUnroll pass to be able to unroll loops
with unknown trip counts. This is left off by default, and a
command-line option enables it. It also begins to separate loop
unrolling into a utility routine; eventually it might be made usable
from other passes.

It currently works by inserting conditional branches between each
unrolled iteration, unless it proves that the trip count is a
multiple of a constant integer > 1, which it currently only does in
the rare case that the trip count expression is a Mul operator with
a ConstantInt operand. Eventually this information might be provided
by other sources, for example by a pass that peels/splits the loop
for this purpose.

llvm-svn: 36990
2007-05-11 20:53:41 +00:00
Chris Lattner 600db3eb96 fix regressions from my previous checking, including
Transforms/InstCombine/2006-12-08-ICmp-Combining.ll

llvm-svn: 36989
2007-05-11 16:58:45 +00:00
Chris Lattner fe2b44de9f fix Transforms/InstCombine/2007-05-10-icmp-or.ll
llvm-svn: 36984
2007-05-11 05:55:56 +00:00
Devang Patel 9557247412 Fix PR1333
Testcases :
http://lists.cs.uiuc.edu/pipermail/llvm-commits/Week-of-Mon-20070507/049451.html
http://lists.cs.uiuc.edu/pipermail/llvm-commits/Week-of-Mon-20070507/049452.html

llvm-svn: 36955
2007-05-09 08:24:12 +00:00
Dan Gohman 2e1f804764 Fix various whitespace inconsistencies.
llvm-svn: 36936
2007-05-08 15:19:19 +00:00
Dan Gohman 49d08a57f5 Correct the comment for ApproximateLoopSize to reflect what it actually does.
llvm-svn: 36935
2007-05-08 15:14:19 +00:00
Dale Johannesen 86e1dcf530 Don't generate branch to entry block.
llvm-svn: 36917
2007-05-08 01:01:04 +00:00
Chris Lattner 3b6f75cb2f Fix PR1395, by passing the ID correctly
llvm-svn: 36894
2007-05-06 23:13:56 +00:00
Nick Lewycky e7da2d6ac3 Fix typo in comment.
llvm-svn: 36873
2007-05-06 13:37:16 +00:00
Chris Lattner 9b35b3e863 Fix a bug in my previous patch
llvm-svn: 36857
2007-05-06 07:24:03 +00:00
Chris Lattner 5aa73fe34c Implement Transforms/InstCombine/cast_ptr.ll
llvm-svn: 36809
2007-05-05 22:41:33 +00:00
Chris Lattner 361e981415 wrap long lines
llvm-svn: 36807
2007-05-05 22:32:24 +00:00
Chris Lattner 1077d2a30d Fix Transforms/LoopUnroll/2007-05-05-UnrollMiscomp.ll and PR1385.
If we have a LCSSA, only modify the input value if the inval was defined
by an instruction in the loop.  If defined by something before the loop,
it is still valid.

llvm-svn: 36784
2007-05-05 18:49:57 +00:00
Chris Lattner 57d89a5a89 make a temporary for *SI, no functionality change.
llvm-svn: 36782
2007-05-05 18:36:36 +00:00
Chris Lattner 5c827bda0d Fix InstCombine/2007-05-04-Crash.ll and PR1384
llvm-svn: 36775
2007-05-05 01:59:31 +00:00
Dan Gohman 2bcbd5b7ca Use IntrinsicInst to test for prefetch instructions, which is ever so
slightly nicer than using CallInst with an extra check; thanks Chris.

llvm-svn: 36743
2007-05-04 14:59:09 +00:00
Dan Gohman 3fbb18d1b6 Allow strength reduction to make use of addressing modes for the
address operand in a prefetch intrinsic.

llvm-svn: 36713
2007-05-03 23:20:33 +00:00
Devang Patel 8c78a0bff0 Drop 'const'
llvm-svn: 36662
2007-05-03 01:11:54 +00:00
Devang Patel e95c6ad802 Use 'static const char' instead of 'static const int'.
Due to darwin gcc bug, one version of darwin linker coalesces
static const int, which defauts PassID based pass identification.

llvm-svn: 36652
2007-05-02 21:39:20 +00:00
Lauro Ramos Venancio 41223586a2 Fix build error.
llvm-svn: 36648
2007-05-02 20:37:47 +00:00
Devang Patel 09f162ca6a Do not use typeinfo to identify pass in pass manager.
llvm-svn: 36632
2007-05-01 21:15:47 +00:00
Anton Korobeynikov 546ea7ea88 Implement review feedback
llvm-svn: 36564
2007-04-29 18:02:48 +00:00
Anton Korobeynikov b18f8f85e9 Implement review feedback. Aliasees can be either GlobalValue's or
bitcasts of them.

llvm-svn: 36537
2007-04-28 13:45:00 +00:00
Chris Lattner 089e35cc57 fix a bug triggered by 403.gcc
llvm-svn: 36527
2007-04-28 05:27:36 +00:00
Chris Lattner 6e880871e9 Fix several latent bugs in EmitGEPOffset that didn't manifest with its
previous clients.  This fixes MallocBench/gs

llvm-svn: 36525
2007-04-28 04:52:43 +00:00
Chris Lattner c753800800 uhn zap cvs
llvm-svn: 36523
2007-04-28 03:50:56 +00:00
Chris Lattner acbf6a401d Implement PR1345 and Transforms/InstCombine/bitcast-gep.ll
llvm-svn: 36521
2007-04-28 00:57:34 +00:00
Chris Lattner 1db224db92 refactor some code relating to pointer cast xforms, pulling it out of the codepath
for unrelated casts.

llvm-svn: 36511
2007-04-27 17:44:50 +00:00
Zhou Sheng 3178736d50 Using APInt more efficiently.
llvm-svn: 36475
2007-04-26 16:42:07 +00:00
Devang Patel d3ccc073a2 Mem2Reg does not need TargetData.
llvm-svn: 36444
2007-04-25 18:32:35 +00:00
Devang Patel 073be55d8e Remove unused function argument.
llvm-svn: 36441
2007-04-25 17:15:20 +00:00
Anton Korobeynikov a97b694c82 Implement aliases. This fixes PR1017 and it's dependent bugs. CFE part
will follow.

llvm-svn: 36435
2007-04-25 14:27:10 +00:00
Chris Lattner 827cb98a0a If an alloca only has two types of uses: 1) reads 2) a memcpy/memmove that
copies from a constant global, then we can change the reads to read from the
global instead of from the alloca.  This eliminates the alloca and the memcpy,
and promotes secondary optimizations (because the loads are now loads from
a constant global).

This is important for a common C idiom:

void foo() {
   int A[] = {1,2,3,4,5,6,7,8,9...};
   ... only reads of A ...
}

For some reason, people forget to mark the array static or const.

This triggers on these multisource benchmarks:
JM/ldecode: block_pos, [3 x [4 x [4 x i32]]]
FreeBench/mason: m, [18 x i32], inlined 4 times
MiBench/office-stringsearch: search_strings, [1332 x i8*]
MiBench/office-stringsearch: find_strings, [1333 x i8*]
Prolangs-C++/city: dirs, [9 x i8*], inlined 4 places

and these spec benchmarks:
177.mesa: message, [8 x [32 x i8]]
186.crafty: bias_rl45, [64 x i32]
186.crafty: diag_sq, [64 x i32]
186.crafty: empty, [9 x i8]
186.crafty: xlate, [15 x i8]
186.crafty: status, [13 x i8]
186.crafty: bdinfo, [25 x i8]
445.gobmk: routines, [16 x i8*]
458.sjeng: piece_rep, [14 x i8*]
458.sjeng: t, [13 x i32], inlined 4 places.
464.h264ref: block8x8_idx, [3 x [4 x [4 x i32]]]
464.h264ref: block_pos, [3 x [4 x [4 x i32]]]
464.h264ref: j_off_tab, [12 x i32]

This implements Transforms/ScalarRepl/memcpy-from-global.ll

llvm-svn: 36429
2007-04-25 06:40:51 +00:00
Chris Lattner 31e5addb67 refactor the SROA code out into its own method, no functionality change.
llvm-svn: 36426
2007-04-25 05:02:56 +00:00
Owen Anderson 510fefcd8a Undo my previous changes. Since my approach to this problem is being revised,
this approach is no longer appropriate.

llvm-svn: 36421
2007-04-25 04:18:54 +00:00
Devang Patel d3208523b2 Fix
http://lists.cs.uiuc.edu/pipermail/llvm-commits/Week-of-Mon-20070423/048376.html

llvm-svn: 36417
2007-04-25 00:37:04 +00:00
Owen Anderson c24701ed7f Rollback some changes that adversely affected performance. I'm currently rethinking
my approach to this, so hopefully I'll find a way to do this without making this slower.

llvm-svn: 36392
2007-04-24 06:40:39 +00:00
Devang Patel 38bc86f057 Fix
http://lists.cs.uiuc.edu/pipermail/llvm-commits/Week-of-Mon-20070423/048333.html

llvm-svn: 36380
2007-04-23 22:42:03 +00:00
Owen Anderson 64995e1b3f Make PredicateSimplifier not use DominatorTree.
llvm-svn: 36300
2007-04-21 07:38:12 +00:00
Owen Anderson 2965adb849 Fix a comment.
llvm-svn: 36299
2007-04-21 07:12:44 +00:00
Jeff Cohen 5959f42498 Comment out usage of write() for now.
llvm-svn: 36287
2007-04-20 22:40:10 +00:00
Devang Patel 83a3adcc3f Avoid recursion.
llvm-svn: 36272
2007-04-20 20:04:37 +00:00
Owen Anderson 2da606c757 Move more passes to using ETForest instead of DominatorTree.
llvm-svn: 36271
2007-04-20 06:27:13 +00:00
Zhou Sheng aafe4e216e Make use of ConstantInt::isZero instead of ConstantInt::isNullValue.
llvm-svn: 36261
2007-04-19 05:39:12 +00:00
Zhou Sheng 82fcf3cb5f Make the operations of APInt variables more efficient.
llvm-svn: 36260
2007-04-19 05:35:00 +00:00
Evan Cheng db9b65d67a Revert Owen's last check-in. This is breaking Mac OS X / PPC llvm-gcc bootstrap.
llvm-svn: 36258
2007-04-18 22:39:00 +00:00
Owen Anderson 9421f03959 Revert changes that caused breakage.
llvm-svn: 36255
2007-04-18 06:46:57 +00:00
Owen Anderson 9a6091dec1 Switch more uses of DominatorTree over to ETForest.
llvm-svn: 36254
2007-04-18 05:43:13 +00:00
Owen Anderson 550e8db9c7 Use ETForest instead of DominatorTree.
llvm-svn: 36252
2007-04-18 05:25:43 +00:00
Owen Anderson fc40d446c9 Use ETForest instead of DominatorTree.
llvm-svn: 36249
2007-04-18 04:55:33 +00:00
Owen Anderson 08293fd6d1 Use new ETForest accessor.
llvm-svn: 36248
2007-04-18 04:46:35 +00:00