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19238 Commits

Author SHA1 Message Date
Owen Anderson
2cf00c37de Fix typo in a comment. 
llvm-svn: 37526
 2007-06-08 20:57:08 +00:00
Owen Anderson
4621335527 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
Evan Cheng
515e2537d7 Correct transfer predicate information. 
llvm-svn: 37524
 2007-06-08 19:17:12 +00:00
Evan Cheng
49720a7312 Hidden options to help debugging ifcvt issues. 
llvm-svn: 37523
 2007-06-08 19:10:51 +00:00
David Greene
6b14050d1e Factor live variable analysis so it does not do register coalescing 
simultaneously.  Move that pass to SimpleRegisterCoalescing.

This makes it easier to implement alternative register allocation and
coalescing strategies while maintaining reuse of the existing live
interval analysis.

llvm-svn: 37520
 2007-06-08 17:18:56 +00:00
Evan Cheng
a41764f141 Allow more cmp / bcc to be predicated; clean up triangle ifcvt checking code. 
llvm-svn: 37518
 2007-06-08 09:36:04 +00:00
Evan Cheng
4c6df8ba37 Fix ARM condition code subsumission check. 
llvm-svn: 37517
 2007-06-08 09:14:47 +00:00
Evan Cheng
8eff719058 tBcc is not a barrier. 
llvm-svn: 37516
 2007-06-08 09:13:23 +00:00
Duncan Sands
f31e17574a Use more realistically sized vectors. Reserve capacity if we know in advance 
how much will be used.

llvm-svn: 37515
 2007-06-08 08:59:11 +00:00
Owen Anderson
64daf17aa0 Small bugfix, and const-ify some methods (Thanks, Bill). 
llvm-svn: 37513
 2007-06-08 01:52:45 +00:00
Devang Patel
cfb3a761ae 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
Dale Johannesen
74ffb6ffb3 Make throttle a hidden parameter, per review. 
llvm-svn: 37511
 2007-06-08 01:08:52 +00:00
Owen Anderson
ccd2616fbb Add partial redundancy elimination. 
llvm-svn: 37510
 2007-06-08 01:03:01 +00:00
Dale Johannesen
0903dd4e52 Throttle tail merging; handling blocks with large numbers of predecessors 
is too slow.

llvm-svn: 37509
 2007-06-08 00:34:27 +00:00
Devang Patel
d544f5262e Use DominatorTree instead of ETForest. 
llvm-svn: 37507
 2007-06-08 00:17:13 +00:00
Devang Patel
b5554f450a Do not preserve ETForest. 
llvm-svn: 37506
 2007-06-08 00:02:08 +00:00
Devang Patel
67ede3d635 Use DominatorTree instead of ETForest. 
llvm-svn: 37505
 2007-06-07 23:53:38 +00:00
Devang Patel
9772222f41 Add instruction level dominates(A,B) interface. 
llvm-svn: 37504
 2007-06-07 23:52:40 +00:00
Evan Cheng
2b9e9abed1 Only remove the edge from entry to false if false block is merged. 
llvm-svn: 37503
 2007-06-07 22:31:28 +00:00
Devang Patel
8d261e921f Do not require ETForest. Now it is unused by LICM. 
llvm-svn: 37502
 2007-06-07 22:21:15 +00:00
Devang Patel
3daf3625ab Do not use ETForest as well as DomiantorTree. DominatorTree is sufficient. 
llvm-svn: 37501
 2007-06-07 22:17:16 +00:00
Devang Patel
a466c96f77 Use DominatorTree instead of ETForest. 
This allows faster immediate domiantor walk.

llvm-svn: 37500
 2007-06-07 21:57:03 +00:00
Devang Patel
5678b94d16 Use DominatorTree instead of ETForest. 
llvm-svn: 37499
 2007-06-07 21:42:15 +00:00
Devang Patel
de2a20aefe Use DominatorTree instead of ETForest. 
llvm-svn: 37498
 2007-06-07 21:35:27 +00:00
Dale Johannesen
0f3c011fd5 Do not change the size of function arguments. PR 1489. 
llvm-svn: 37496
 2007-06-07 21:07:15 +00:00
Devang Patel
5c0808db4f Use DominatorTree instead of ETForest. 
llvm-svn: 37495
 2007-06-07 18:45:06 +00:00
Devang Patel
700d930e73 Use DominatorTree instead of ETForest. 
llvm-svn: 37494
 2007-06-07 18:40:55 +00:00
Devang Patel
babcd06827 Maintain ETNode as part of DomTreeNode. 
This adds redundancy for now.

llvm-svn: 37492
 2007-06-07 17:47:21 +00:00
Tanya Lattner
968030663f Formating fixes. 
llvm-svn: 37491
 2007-06-07 17:12:16 +00:00
Evan Cheng
4f73706838 ifcvt a triangle: don't merge ifcvt block with rejoin block if it can fall through to it. If merged, the resulting block is not a candidate for iterative ifcvting since it contains both predicated and non-predicated code. 
llvm-svn: 37487
 2007-06-07 08:13:00 +00:00
Zhou Sheng
030400527a Add assert to check if the attributes ZExt/SExt, NoAlias are apply to the 
correct type of parameters.

llvm-svn: 37486
 2007-06-07 06:12:03 +00:00
Evan Cheng
d440a235a1 Lots of bug fixes. Now finally in a reasonable state. 
llvm-svn: 37485
 2007-06-07 02:12:15 +00:00
Evan Cheng
9f23724d53 Stupid cut-n-paste bug caused me soooo much grief. Why wasn't there a compilation warning? I blame it on the FE folks. 
llvm-svn: 37484
 2007-06-07 01:37:54 +00:00
Lauro Ramos Venancio
9907d0f8db Propagate alignment, section name and visibility when linking "appending 
global values".
Fix noinline linkage.

llvm-svn: 37482
 2007-06-06 22:01:12 +00:00
Tanya Lattner
9672d69be2 Instruct the inliner to obey the noinline attribute. Add test case. 
llvm-svn: 37481
 2007-06-06 21:59:26 +00:00
Chris Lattner
c5d0dc3554 simplify this code and fix PR1493, now that llvm-gcc3 is dead. 
llvm-svn: 37478
 2007-06-06 20:51:41 +00:00
Devang Patel
ace719b5fd Add new dominator tree node into dominator tree node map. 
llvm-svn: 37475
 2007-06-06 20:08:11 +00:00
Lauro Ramos Venancio
27fa43f343 Fix PR1499. 
llvm-svn: 37472
 2007-06-06 17:08:48 +00:00
Owen Anderson
b333dd064e 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
 2007-06-06 16:22:00 +00:00
Duncan Sands
9bef60ea1a Fold the exception actions table harder: if two typeid lists start the 
same, only output one copy of the common part.

llvm-svn: 37470
 2007-06-06 15:37:31 +00:00
Nick Lewycky
2897eb89d0 Optimize this test. Firstly, only Instructions may use other Instructions. 
Secondly, checking whether removal succeeded tells you whether it was in
the map to begin with.

llvm-svn: 37469
 2007-06-06 11:26:20 +00:00
Evan Cheng
7b433a2954 Mark these instructions clobbersPred. They modify the condition code register. 
llvm-svn: 37468
 2007-06-06 10:17:05 +00:00
Evan Cheng
aeccfbef8b Lots of bug fixes. 
llvm-svn: 37467
 2007-06-06 10:16:17 +00:00
Evan Cheng
055d2fc508 Added clobbersPred. 
llvm-svn: 37466
 2007-06-06 10:15:28 +00:00
Duncan Sands
484bdb927b Additional fix for PR1422: make sure the landing pad label is placed in the 
correct machine basic block - do not rely on the eh.exception intrinsic
being in the landing pad: the loop optimizers can move it out.

llvm-svn: 37463
 2007-06-06 10:05:18 +00:00
Bruno Cardoso Lopes
709699b8d3 Initial Mips support, here we go! =) 
- Modifications from the last patch included
  (issues pointed by Evan Cheng are now fixed).
- Added more MipsI instructions.
- Added more patterns to match branch instructions.

llvm-svn: 37461
 2007-06-06 07:42:06 +00:00
Nick Lewycky
c667323382 Fix PR1487 and Transforms/IndVar/2007-06-06-DeleteDanglesPtr.ll 
llvm-svn: 37459
 2007-06-06 04:12:20 +00:00
Nick Lewycky
65199a504b 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
Evan Cheng
4c42a30bad If a unconditional branch is added to branch to the false path during ifcvt, the predicated block cannot be iteratively ifcvted. 
llvm-svn: 37456
 2007-06-06 02:08:52 +00:00
Owen Anderson
501e5873d4 Add simple full redundancy elimination. 
llvm-svn: 37455
 2007-06-06 01:27:49 +00:00
Chris Lattner
a874ddba43 Fix PR1495 and CodeGen/X86/2007-06-05-LSR-Dominator.ll 
llvm-svn: 37454
 2007-06-06 01:23:55 +00:00
Evan Cheng
cc7186df2b Minor statistics counting bug. 
llvm-svn: 37451
 2007-06-06 01:12:44 +00:00
Evan Cheng
2eefb6f4c3 Fix a couple of typos and be smarter about order of blocks when ifcvt a diamond. 
llvm-svn: 37449
 2007-06-06 00:57:55 +00:00
Devang Patel
61661c6774 Avoid non-trivial loop unswitching while optimizing for size. 
llvm-svn: 37446
 2007-06-06 00:21:03 +00:00
Chris Lattner
9a57dc1923 Fix a user-reported error building with GCC 3.4.4 on Cygwin. 
llvm-svn: 37445
 2007-06-05 23:49:06 +00:00
Evan Cheng
3db28ad9f2 Fix diamond shape ifcvt bugs. 
llvm-svn: 37444
 2007-06-05 23:46:14 +00:00
Owen Anderson
3aa2107b02 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
3c9c199f2d Don't leak memory. 
llvm-svn: 37442
 2007-06-05 22:11:49 +00:00
Evan Cheng
acf719bf83 ReplaceUsesOfBlockWith() can modify the predecessors list. 
llvm-svn: 37441
 2007-06-05 22:03:53 +00:00
Evan Cheng
f2a2a5a025 Do not ifcvt if either true / false path is a backedge. Not profitable in almost all cases. 
llvm-svn: 37440
 2007-06-05 20:38:42 +00:00
Devang Patel
606fb412b0 Fix PR 1497 
Use separate pass id for CFGOnlyPrinter.

llvm-svn: 37439
 2007-06-05 20:24:36 +00:00
Evan Cheng
886c1f49ca Print predicate of the second instruction of the two-piece constant MI. 
llvm-svn: 37437
 2007-06-05 18:55:18 +00:00
Owen Anderson
25a0068940 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
08d77288c1 Allow insertelement, extractelement, and shufflevector to be hoisted/sunk 
by LICM.

llvm-svn: 37435
 2007-06-05 16:05:55 +00:00
Evan Cheng
820e352652 PIC label asm printing cosmetic changes. 
llvm-svn: 37434
 2007-06-05 07:36:38 +00:00
Evan Cheng
d495b2f9b9 I had a senior moment. 
llvm-svn: 37433
 2007-06-05 07:05:25 +00:00
Zhou Sheng
09b12fef98 Commit first round work of PR1373. "noalias" is now fully supported in 
VMCore, BitCode, and Assembly. Documentation and test case paramattrs.ll
updated also.

llvm-svn: 37432
 2007-06-05 05:28:26 +00:00
Evan Cheng
a7f7c92dc9 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
 2007-06-05 01:31:40 +00:00
Evan Cheng
7b113514d4 Fix some subtle bugs: bug during succeessor copying; incorrectly updating states of ifcvted blocks. 
llvm-svn: 37429
 2007-06-05 00:07:37 +00:00
Bill Wendling
d2b1274d1b Patches by Chuck Rose to unbreak V Studio builds. 
Thanks Chuck!

llvm-svn: 37428
 2007-06-04 23:52:59 +00:00
Dale Johannesen
a68662e4a4 Tail merging wasn't working for predecessors of landing pads. PR 1496. 
llvm-svn: 37427
 2007-06-04 23:52:54 +00:00
Devang Patel
ba29e5e591 s/ETNode::getChildren/ETNode::getETNodeChildren/g 
llvm-svn: 37426
 2007-06-04 23:45:02 +00:00
Owen Anderson
dde6943d82 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
0cab4450c3 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
7726564331 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
Evan Cheng
8728a6c3fd Global ctors / dtors alignment shouldn't be hard-coded at 4. e.g. It could be 8 for 64-bit targets. 
llvm-svn: 37421
 2007-06-04 20:39:18 +00:00
Evan Cheng
79f53ff66d Forgot to check for if iterator reached the end. 
llvm-svn: 37420
 2007-06-04 20:33:36 +00:00
Evan Cheng
fdfe615197 Misuse of hasExternalLinkage(), should be checking isDeclaration(). 
llvm-svn: 37419
 2007-06-04 18:54:57 +00:00
Owen Anderson
2043bb65a4 Make phi_translate correct. 
llvm-svn: 37418
 2007-06-04 18:05:26 +00:00
Devang Patel
3ad9b9f927 Add FIXMEs. 
llvm-svn: 37417
 2007-06-04 17:38:00 +00:00
Devang Patel
74785c1f3c s/DominatorTree::createNewNode/DominatorTree::addNewBlock/g 
llvm-svn: 37415
 2007-06-04 16:43:25 +00:00
Devang Patel
26d8a86df7 Add basic block level interface to change immediate dominator 
and create new node.

llvm-svn: 37414
 2007-06-04 16:22:33 +00:00
Dan Gohman
e6c827b537 Pass the DAG to SDNode::dump to let it do more detailed dumps in some cases. 
llvm-svn: 37413
 2007-06-04 16:17:33 +00:00
Dan Gohman
b69321ca1d Resolve implicit alignment before computing the FoldingSet information so 
that the CSE map always contains explicit alignment information. This allows
more loads to be CSE'd when there is a mix of explicit-alignment loads and
implicit-alignment loads.

Also, in SelectionDAG::FindModifiedNodeSlot, add the operands to the
FoldingSetNodeID before the load/store information instead of after, so
that it matches what is done elsewhere.

llvm-svn: 37411
 2007-06-04 15:49:41 +00:00
Devang Patel
917048baee Fix LLVM build on NetBSD. Patch by Neil Booth. 
llvm-svn: 37410
 2007-06-04 15:28:57 +00:00
Evan Cheng
c86e3086da Let IfConverter loose. Allow more aggressive subsumptions; reorder basic blocks to expose more ifcvt opportunities; code clean up and fixes. 
llvm-svn: 37409
 2007-06-04 06:47:22 +00:00
Evan Cheng
0dbe4d04db Move ReplaceUsesOfBlockWith() out of BranchFolding into a MachineBasicBlock general facility. 
llvm-svn: 37408
 2007-06-04 06:44:01 +00:00
Devang Patel
2ef6caf14f s/llvm::DominatorTreeBase::DomTreeNode/llvm::DomTreeNode/g 
llvm-svn: 37407
 2007-06-04 00:32:22 +00:00
Owen Anderson
39e6d31260 Don't use the custom comparator where it's not necessary. 
llvm-svn: 37406
 2007-06-03 22:02:14 +00:00
Anton Korobeynikov
bbb85e2738 Add comments to fallsthrough cases. Also, this fixes PR1492 
llvm-svn: 37405
 2007-06-03 19:20:49 +00:00
Anton Korobeynikov
a8154b6330 Check arguments & return types of main(). Abort in case of no match. 
llvm-svn: 37404
 2007-06-03 19:17:35 +00:00
Devang Patel
d58b82f83a s/DominatorTreeBase::Node/DominatorTreeBase:DomTreeNode/g 
llvm-svn: 37403
 2007-06-03 06:26:14 +00:00
Owen Anderson
76e8d46c1b Remove an unused method. 
llvm-svn: 37402
 2007-06-03 05:58:25 +00:00
Owen Anderson
d7388dc4ce 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
Chris Lattner
8a38eebb69 update this entry, now that Anton implemented shift/and lowering for 
switches.  There is one really easy isel thing here with tst we are not
getting.

llvm-svn: 37400
 2007-06-02 18:45:14 +00:00
Duncan Sands
f37bc8207e The semantics of invoke require that we always jump to the unwind block 
(landing pad) when an exception unwinds through the call.  This doesn't
quite match the way the dwarf unwinder works: by default it only jumps to
the landing pad if the catch or filter specification matches, and otherwise
it keeps on unwinding.  There are two ways of specifying to the unwinder
that it should "always" (more on why there are quotes here later) jump to
the landing pad: follow the specification by a 0 typeid, or follow it by
the typeid for the NULL typeinfo.  GCC does the first, and this patch makes
LLVM do the same as gcc.  However there is a problem: the unwinder performs
optimizations based on C++ semantics (it only expects destructors to be
run if the 0 typeid fires - known as "cleanups"), meaning it assumes that no
exceptions will be raised and that the raised exception will be reraised
at the end of the cleanup code.  So if someone writes their own LLVM code
using the exception intrinsics they will get a nasty surprise if they don't
follow these rules.  The other possibility of using the typeid corresponding
to NULL (catch-all) causes the unwinder to make no assumptions, so this is
probably what we should use in the long-run.  However since we are still
having trouble getting exception handling working properly, for the moment
it seems best to closely imitate GCC.

llvm-svn: 37399
 2007-06-02 17:16:06 +00:00
Duncan Sands
37925d3f39 Integrate exception filter support and exception catch support. This 
simplifies the code in DwarfWriter, allows for multiple filters and
makes it trivial to specify filters accompanied by cleanups or catch-all
specifications (see next patch).  What a deal!  Patch blessed by Anton.

llvm-svn: 37398
 2007-06-02 16:53:42 +00:00
Zhou Sheng
60714d7922 Make LowerCTPOP() support arbitrary bitwidth integer type. 
llvm-svn: 37397
 2007-06-02 04:10:33 +00:00
Dale Johannesen
63d49a09aa Fix CorrectExtraCFGEdges to allow for multiple LandingPad targets. 
llvm-svn: 37394
 2007-06-02 00:08:15 +00:00
Dale Johannesen
071dbb1f87 Fancier algorithm in tail-merge comment implemented, so remove comment. 
llvm-svn: 37393
 2007-06-01 23:04:28 +00:00
Dale Johannesen
fd7f1ad2f7 Implement smarter algorithm for choosing which blocks to tail-merge. 
See test/CodeGen/X86/test-pic-jtbl.ll for a case where it works well;
shaves another 10K off our favorite benchmark.  I was hesitant about
this because of compile speed, but seems to do OK on a bootstrap.

llvm-svn: 37392
 2007-06-01 23:02:45 +00:00
Reid Spencer
9baf82d943 For PR1486: 
Avoid overwriting the APInt instance with 0 bytes which causes the bitwidth
to be set to 0 (illegal) producing a subsequent assert.

llvm-svn: 37391
 2007-06-01 22:23:29 +00:00
Devang Patel
bdacf6c9c9 Insert new instructions in AliasSet. 
llvm-svn: 37390
 2007-06-01 22:15:31 +00:00
Owen Anderson
fadd9e4a7a clean() needs to process things in topological order. 
llvm-svn: 37389
 2007-06-01 22:00:37 +00:00
Evan Cheng
8a52b80cdf Opcode modifier s comes after condition code. e.g. addlts, not addslt. 
llvm-svn: 37388
 2007-06-01 20:51:29 +00:00
Evan Cheng
d7793e4561 Correctly mark early-exit on the false path. 
llvm-svn: 37387
 2007-06-01 20:29:21 +00:00
Owen Anderson
da27462cea Fix Expression comparison, which in turn fixes a value numbering error. 
llvm-svn: 37386
 2007-06-01 17:34:47 +00:00
Evan Cheng
8589b95a33 Set ARM ifcvt duplication limit to 3 for now. 
llvm-svn: 37385
 2007-06-01 08:28:59 +00:00
Duncan Sands
b1cc3f9881 Since TypeInfos are passed as i8 pointers, a NULL TypeInfo should be passed 
as a null i8 pointer not as a 0 i32.

llvm-svn: 37383
 2007-06-01 08:18:30 +00:00
Evan Cheng
ce6bae7667 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
 2007-06-01 07:41:07 +00:00
Evan Cheng
c2fec89f4a Make jumptable non-predicable for now. 
llvm-svn: 37381
 2007-06-01 00:56:15 +00:00
Evan Cheng
8e188afada 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
 2007-06-01 00:55:26 +00:00
Evan Cheng
7c081d0d02 Allow multiple ifcvt candidates to share children blocks; add some debugging code. 
llvm-svn: 37379
 2007-06-01 00:12:12 +00:00
Owen Anderson
6e39e65e7f Add a topological sort function. 
llvm-svn: 37376
 2007-05-31 22:44:11 +00:00
Dale Johannesen
4ca6f07cf0 Arrange for only 1 of multiple branches to landing pad to be kept. 
Do not remove empty landing pads (EH table needs to be updated)

llvm-svn: 37375
 2007-05-31 21:54:00 +00:00
Evan Cheng
7a6edf8eab Fix a typo. 
llvm-svn: 37374
 2007-05-31 20:53:33 +00:00
Chris Lattner
72e07238ba Fix the asmprinter so that a globalvalue can specify an explicit alignment 
smaller than the preferred alignment, but so that the target can actually
specify a minimum alignment if needed.  This fixes some objc protocol
failures Devang tracked down.

llvm-svn: 37373
 2007-05-31 18:57:45 +00:00
Lauro Ramos Venancio
b5186a0078 Fix PR1424. 
When a function has FP, the register scavenging spill slot offset already
was calculated.

llvm-svn: 37371
 2007-05-31 18:27:58 +00:00
Owen Anderson
919ee81e51 Attempt to fix up phi_translate. 
llvm-svn: 37366
 2007-05-31 00:42:15 +00:00
Evan Cheng
c9c6bbd273 Change traversal order to bottom up in preparation for more aggressive if-conversion. 
llvm-svn: 37365
 2007-05-30 19:49:19 +00:00
Chris Lattner
14bcacb40b Fix CodeGen/PowerPC/2007-05-30-dagcombine-miscomp.ll, and PR1473. 
llvm-svn: 37362
 2007-05-30 16:30:06 +00:00
Devang Patel
044601033f Fix typo. 
llvm-svn: 37360
 2007-05-30 15:29:37 +00:00
Chris Lattner
fd963f9138 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
Dale Johannesen
b306dfb861 Changed per review comment. 
llvm-svn: 37355
 2007-05-30 00:32:01 +00:00
Dale Johannesen
1ba04f7d87 Make stable_sort in tail merging actually be stable (it never was, but didn't 
matter until my last change).  Reenable tail merging by default.

llvm-svn: 37354
 2007-05-29 23:47:50 +00:00
Evan Cheng
a1300649ba Don't merge in tail block of a diamond if it has more than one predecessors after if-conversion. 
llvm-svn: 37353
 2007-05-29 23:37:20 +00:00
Evan Cheng
3672d15956 For VFP2 fldm, fstm instructions, the condition code is printed after the address mode and size specifier. e.g. fstmiaseq, not fstmeqias. 
llvm-svn: 37351
 2007-05-29 23:34:19 +00:00
Owen Anderson
328c980fad Fix a typo 
llvm-svn: 37350
 2007-05-29 23:34:14 +00:00
Evan Cheng
5df14b3451 For ldrb, strh, etc., the condition code is before the width specifier. e.g. streqh, not strheq. 
llvm-svn: 37349
 2007-05-29 23:32:06 +00:00
Owen Anderson
0f46c29ffd Re-fix a bug, where I was now being too aggressive. 
llvm-svn: 37348
 2007-05-29 23:26:30 +00:00
Owen Anderson
cfeeaac401 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
1e1d693893 Comment debug code out that I accidentally uncommented last time. 
llvm-svn: 37346
 2007-05-29 22:43:03 +00:00
Owen Anderson
707e37c6a6 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
Evan Cheng
b1ba206831 If there is an empty block between a source and its successor block, it still requires a unconditional branch. 
llvm-svn: 37344
 2007-05-29 22:31:16 +00:00
Owen Anderson
83bd7bcf6c 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
Evan Cheng
ff31eed2be Add missing const qualifiers. 
llvm-svn: 37342
 2007-05-29 18:42:18 +00:00
Evan Cheng
d8b25a2091 Add missing const qualifiers. 
llvm-svn: 37341
 2007-05-29 18:35:22 +00:00
Nicolas Geoffray
fff14eecb5 Implementation of compilation callback in PPC ELF32 
llvm-svn: 37340
 2007-05-29 16:33:18 +00:00
Zhou Sheng
3e018c3e3e Correct the logic in LowerPartSet which cleared the bits from 0 to low-1. 
llvm-svn: 37331
 2007-05-26 03:43:13 +00:00
Chris Lattner
5161203d52 tighten up recursion depth again 
llvm-svn: 37330
 2007-05-25 02:19:06 +00:00
Evan Cheng
36164f93fd Silly boog. 
llvm-svn: 37328
 2007-05-25 00:59:01 +00:00
Chris Lattner
8d43dc619d Fix PR1446 by not scalarrepl'ing giant structures. 
llvm-svn: 37326
 2007-05-24 18:43:04 +00:00
Dale Johannesen
86fb3a132a Blocks that cond-br and uncond-br/fallthrough to same block should have 
only one successor.

llvm-svn: 37324
 2007-05-24 18:31:55 +00:00
Dale Johannesen
ecaa8a0fb4 Fix for PR1444: do not create two successors to the same block. 
Temporarily, this breaks CodeGen/Generic/2006-02-12-InsertLibraryCall.ll
by exposing an unrelated latent problem; working on that.

llvm-svn: 37323
 2007-05-24 17:39:32 +00:00
Zhou Sheng
377a4d443b Compute the correct word number. 
llvm-svn: 37322
 2007-05-24 15:03:18 +00:00
Dan Gohman
2c5d31ee81 Minor comment cleanups. 
llvm-svn: 37321
 2007-05-24 14:36:04 +00:00
Dan Gohman
1b1932dda5 Add explicit qualification for namespace MVT members. 
llvm-svn: 37320
 2007-05-24 14:33:05 +00:00
Dan Gohman
a98a5763f9 Add cases for v2f32. 
llvm-svn: 37319
 2007-05-24 14:29:12 +00:00
Evan Cheng
439bf58dc2 Fix a typo that caused combiner to create mal-formed pre-indexed store where value store is the same as the base pointer. 
llvm-svn: 37318
 2007-05-24 02:35:39 +00:00
Dale Johannesen
d0b7bbe261 Two tail merging improvements: 
When considering blocks with more than 2 predecessors, merge the block with
the largest number of matching insns, rather than the first block found.
Considering that 1 matching insn is enough to show a win for candidates that
already end with a branch.

llvm-svn: 37315
 2007-05-23 21:07:20 +00:00
Devang Patel
bf5c49f62c Add dump() routines for debugging assistance. 
llvm-svn: 37314
 2007-05-23 19:55:36 +00:00
Anton Korobeynikov
0f184e86ab Mark all calls as "could throw", when exceptions are enabled. Emit necessary LP info too. This fixes PR1439 
llvm-svn: 37311
 2007-05-23 11:08:31 +00:00
Chris Lattner
d540c6429f prevent exponential recursion in isNegatibleForFree 
llvm-svn: 37310
 2007-05-23 07:35:22 +00:00
Evan Cheng
3f44824179 Preliminary iterative if-conversion support. 
llvm-svn: 37309
 2007-05-23 07:23:16 +00:00
Evan Cheng
80122ab529 Hooks for predication support. 
llvm-svn: 37308
 2007-05-23 07:22:05 +00:00
Evan Cheng
9f763bd3fd Rename a parameter. 
llvm-svn: 37307
 2007-05-23 07:21:11 +00:00
Chris Lattner
d339f51afd when merging two alias sets together, be sure to propagate the volatility of 
the inner set.  This fixes PR1435 and Transforms/LICM/2007-05-22-VolatileSink.ll

llvm-svn: 37305
 2007-05-23 06:36:35 +00:00
Devang Patel
c81283a894 If user wants to run instcombine twice, do not block it. 
llvm-svn: 37301
 2007-05-23 05:08:52 +00:00
Chris Lattner
4cc07421ee fix a miscompilation when passing a float through varargs 
llvm-svn: 37297
 2007-05-23 01:17:04 +00:00
Reid Spencer
c60a73917d Reinstate the patch for escaping non-printing characters and allow for 
\\ to escape \. All these cases are now handled by the AsmParser.

llvm-svn: 37295
 2007-05-22 19:27:35 +00:00
Reid Spencer
b989fcc157 Regenerate. 
llvm-svn: 37294
 2007-05-22 19:08:16 +00:00
Reid Spencer
e7aa6d1247 Don't allow the UnEscape code to read or write beyond the end of yytext. 
Make sure we convert \\ into \.

llvm-svn: 37293
 2007-05-22 19:07:45 +00:00
Reid Spencer
c0e0e864b3 Regenerate. 
llvm-svn: 37292
 2007-05-22 18:52:55 +00:00
Reid Spencer
4c7237fdca Implement full unescaping of escaped hex characters in all quoted identifiers 
and strings.

llvm-svn: 37291
 2007-05-22 18:52:21 +00:00
Dale Johannesen
738f94210c name change requested by review of previous patch 
llvm-svn: 37289
 2007-05-22 18:31:04 +00:00
Owen Anderson
fd5693fcc4 Silence a warning. 
llvm-svn: 37288
 2007-05-22 18:13:40 +00:00
Dale Johannesen
fe0fe14411 Make tail merging the default, except on powerPC. There was no prior art 
for a target-dependent default with a command-line override; this way
should be generally usable.

llvm-svn: 37285
 2007-05-22 17:14:46 +00:00
Chris Lattner
1509e17e6c temporarily revert reid's asmwriter patch, it is missing the asmparser piece 
that decodes the escape sequences, thus breaking all cases that use them.

This fixes test/Assembler/2007-05-21-Escape.ll

llvm-svn: 37284
 2007-05-22 07:00:50 +00:00
Chris Lattner
d645a38841 update comment 
llvm-svn: 37282
 2007-05-22 06:56:32 +00:00
Chris Lattner
87cf325aad regenerate 
llvm-svn: 37281
 2007-05-22 06:47:55 +00:00
Chris Lattner
27741f22d9 simplify code 
llvm-svn: 37280
 2007-05-22 06:47:11 +00:00
Bill Wendling
26eb9fb1e0 We only need to specify the most-implied feature for an architecture. 
llvm-svn: 37275
 2007-05-22 05:15:37 +00:00
Evan Cheng
f448047ec2 Fix some -march=thumb regressions. tBR_JTr is not predicable. 
llvm-svn: 37272
 2007-05-21 23:17:32 +00:00
Dale Johannesen
f01566b705 Use AXI3 not AXI2 for appropriate PIC PC-relative loads and stores. Cosmetic. 
llvm-svn: 37271
 2007-05-21 22:42:04 +00:00
Evan Cheng
d395b14837 If-convert early exit blocks (returns, etc.); bug fixes, etc. 
llvm-svn: 37270
 2007-05-21 22:22:58 +00:00
Dale Johannesen
8f484d16b0 Add some patterns for PIC PC-relative loads and stores. 
llvm-svn: 37269
 2007-05-21 22:14:33 +00:00
Evan Cheng
d173398eee BlockHasNoFallThrough() now returns true if block ends with a return instruction; AnalyzeBranch() should ignore predicated instructionsd. 
llvm-svn: 37268
 2007-05-21 18:56:31 +00:00
Duncan Sands
05d340bbd1 Only emit one entry in the exception action table for each action, even if 
it occurs for multiple landing pads.

llvm-svn: 37267
 2007-05-21 18:50:28 +00:00
Evan Cheng
3f386274c0 BlockHasNoFallThrough() now returns true if block ends with a return instruction. 
llvm-svn: 37266
 2007-05-21 18:44:17 +00:00
Reid Spencer
dbc381aedd Get the order of the hext digits right! 
llvm-svn: 37261
 2007-05-19 14:44:42 +00:00
Reid Spencer
7170d7ab1b Adjust how LLVM names are produced: 
1. Always use % for local and @ for global.
2. Replace NameNeedsQuotes with QuoteNameIfNeeded so that any adjustments
   to the name can be done in one pass.
3. Implement generation of hex escapes so we don't get "wonky" characters
   in the output.

llvm-svn: 37260
 2007-05-19 07:25:21 +00:00
Reid Spencer
b95962309d Regenerate 
llvm-svn: 37258
 2007-05-19 07:22:10 +00:00
Reid Spencer
b3bb24667a Make the %"..." syntax legal for local name. This just makes it symmetric 
with global names which can already be @"..."

llvm-svn: 37257
 2007-05-19 07:21:26 +00:00
Chris Lattner
dda5066a5e 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
Reid Spencer
2fc9ebc62a On Linux platforms and at optimization levels -O1 and above, llvm-gcc can 
turn "putchar" calls into _IO_putc calls which is a lower-level interface.
This patch allows these calls to be executed by lli in interpreter mode.

llvm-svn: 37254
 2007-05-19 01:36:17 +00:00
Chris Lattner
a13d75f270 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
Chris Lattner
27b469b945 same patch as the previous one, but the symmetric case 
llvm-svn: 37249
 2007-05-19 00:46:51 +00:00
Chris Lattner
2430b7c4aa Disable the (A == (B-A)) -> 2*A == B xform when the sub has multiple uses (in 
this case, the xform introduces an extra operation).  This compiles
PowerPC/compare-duplicate.ll into:

_test:
        subf r2, r3, r4
        cmplw cr0, r2, r3
        bne cr0, LBB1_2 ;F

instead of:

_test:
        slwi r2, r3, 1
        subf r3, r3, r4
        cmplw cr0, r4, r2
        bne cr0, LBB1_2 ;F

This is target independent of course.

llvm-svn: 37246
 2007-05-19 00:43:44 +00:00
Reid Spencer
fe3c213178 Fix an assertion introduced by my last change to the toString method. We 
can't use getZExtValue() to extract the low order bits for each digit.
Instead, we need to access the low order word directly.

llvm-svn: 37242
 2007-05-19 00:29:55 +00:00
Dan Gohman
875f6bde73 Apply this patch: 
http://lists.cs.uiuc.edu/pipermail/llvm-commits/Week-of-Mon-20070514/049845.html

llvm-svn: 37240
 2007-05-18 23:21:46 +00:00
Chris Lattner
a7834d79a0 add a note 
llvm-svn: 37239
 2007-05-18 20:18:14 +00:00
Evan Cheng
ca7bc898aa Clean up. 
llvm-svn: 37237
 2007-05-18 19:32:08 +00:00
Evan Cheng
ad9ce3c5b2 Change to depth-first traversal. 
llvm-svn: 37236
 2007-05-18 19:26:33 +00:00
Dale Johannesen
09b2912ab7 Document an inefficiency in tail merging. 
llvm-svn: 37235
 2007-05-18 18:46:40 +00:00
Dan Gohman
ec87afe526 Use MVT::FIRST_VECTOR_VALUETYPE and MVT::LAST_VECTOR_VALUETYPE. 
llvm-svn: 37234
 2007-05-18 18:44:07 +00:00
Dan Gohman
b593ad9fb0 Qualify calls to getTypeForValueType with MVT:: too. 
llvm-svn: 37233
 2007-05-18 18:41:29 +00:00
Evan Cheng
1ed1741260 Some restructuring in preparation for most aggressive if-conversion. 
llvm-svn: 37231
 2007-05-18 18:14:37 +00:00
Dan Gohman
d6a33914fb Qualify several calls to functions in the MVT namespace, for consistency. 
llvm-svn: 37230
 2007-05-18 17:52:13 +00:00
Evan Cheng
234f07808b Watch out for blocks that end with a return. 
llvm-svn: 37227
 2007-05-18 17:06:53 +00:00
Chris Lattner
c63d04ecce Fix PR1434 and test/Linker/link-archive.ll, this is a regression from 1.9. 
llvm-svn: 37204
 2007-05-18 04:02:46 +00:00
Evan Cheng
40eecb3d06 If true / false blocks fallthrough before ifcvt, add unconditional branches to ifcvt'd block. 
llvm-svn: 37200
 2007-05-18 01:55:58 +00:00
Evan Cheng
e875732104 Mark calls non-predicable for now. Need to ensure it's the last instruction in the if-converted block or make sure it preserve condition code. 
llvm-svn: 37199
 2007-05-18 01:53:54 +00:00
Dale Johannesen
ca37006ffb Remove some unneeded branches. (spotted by Evan, thanks) 
llvm-svn: 37198
 2007-05-18 01:28:58 +00:00
Evan Cheng
03349b0344 Silence some compilation warnings. 
llvm-svn: 37197
 2007-05-18 01:19:57 +00:00
Evan Cheng
c6aa69557a Make use of target specific block size limits; bug fixes. 
llvm-svn: 37195
 2007-05-18 00:20:58 +00:00
Evan Cheng
2fc338fac1 Set ARM if-conversion block size threshold to 10 instructions for now. 
llvm-svn: 37194
 2007-05-18 00:19:34 +00:00
Evan Cheng
90b0ff05f6 RemoveBranch() and InsertBranch() now returns number of instructions deleted / inserted. 
llvm-svn: 37193
 2007-05-18 00:18:17 +00:00
Evan Cheng
234aab208a RemoveBranch() and InsertBranch() now returns number of instructions deleted / inserted. 
llvm-svn: 37192
 2007-05-18 00:05:48 +00:00
Evan Cheng
b4cc6606d5 Move isSuccessor() offline, change it to use std::find. 
llvm-svn: 37190
 2007-05-17 23:58:53 +00:00
Devang Patel
6e8f1aa332 Fix PR1431 
Test case at Transformations/SCCP/2007-05-16-InvokeCrash.ll

llvm-svn: 37185
 2007-05-17 22:10:15 +00:00
Dale Johannesen
f66c6b85f1 More effective breakdown of memcpy into repeated load/store. These are now 
in the order lod;lod;lod;sto;sto;sto which means the load-store optimizer
has a better chance of producing ldm/stm.  Ideally you would get cooperation
from the RA as well but this is not there yet.

llvm-svn: 37179
 2007-05-17 21:31:21 +00:00
Reid Spencer
fe3fc94a44 Get rid of leading zeros in the output of toString. 
llvm-svn: 37175
 2007-05-17 19:23:02 +00:00
Evan Cheng
1b4af5f975 Fix a bogus check that prevented folding VECTOR_SHUFFLE to UNDEF; add an optimization to fold VECTOR_SHUFFLE to a zero vector. 
llvm-svn: 37173
 2007-05-17 18:45:50 +00:00
Evan Cheng
9c4e69e6e5 Added missing patterns for UNPCKH* and PUNPCKH*. 
llvm-svn: 37172
 2007-05-17 18:44:37 +00:00
Chris Lattner
910abfbfd1 disable MaskedValueIsZero, ComputeMaskedBits, and SimplifyDemandedBits for 
i128 integers.  The 64-bit masks are not wide enough to represent the results.
These should be converted to APInt someday.

llvm-svn: 37169
 2007-05-17 18:19:23 +00:00
Chris Lattner
d441344214 add expand support for ADDC/SUBC/ADDE/SUBE so we can codegen 128-bit add/sub on 32-bit (or less) targets 
llvm-svn: 37168
 2007-05-17 18:15:41 +00:00
Chris Lattner
9a53871650 This is the correct fix for PR1427. This fixes mmx-shuffle.ll and doesn't 
cause other regressions.

llvm-svn: 37160
 2007-05-17 17:13:13 +00:00
Anton Korobeynikov
375cafc275 Revert patch for PR1427. It breaks almost all vector tests. 
llvm-svn: 37159
 2007-05-17 07:50:14 +00:00
Chris Lattner
a18b7d76b3 add support for 128-bit add/sub on ppc64 
llvm-svn: 37158
 2007-05-17 06:52:46 +00:00
Reid Spencer
e22c276c5c Print integer values as both decimal and hexadecimal for convenience 
of verifying result values when debugging.

llvm-svn: 37156
 2007-05-17 06:47:54 +00:00
Chris Lattner
307a29e831 add support for 128-bit integer add/sub 
llvm-svn: 37154
 2007-05-17 06:35:11 +00:00
Reid Spencer
39e03f53ca For lshr by 0 bits, just return *this as a short cut. This also prevents 
undefined behavior when the width > 64 bits.

llvm-svn: 37153
 2007-05-17 06:26:29 +00:00
Chris Lattner
f65fe1d931 Fix PR1427 and test/CodeGen/X86/mmx-shuffle.ll 
llvm-svn: 37141
 2007-05-17 03:29:42 +00:00
Evan Cheng
dc9e574073 Remove. Not needed. 
llvm-svn: 37139
 2007-05-17 00:11:35 +00:00
Evan Cheng
4fa2db30d9 Default implementation of TargetInstrInfo::getBlockSize(). 
llvm-svn: 37138
 2007-05-16 23:53:44 +00:00
Evan Cheng
3163b77d5e Add target hook to specify block size limit for if-conversion. 
llvm-svn: 37134
 2007-05-16 23:45:53 +00:00
Dale Johannesen
cc99a6fc32 Don't fold bitconvert(load) for preinc/postdec loads. Likewise stores. 
llvm-svn: 37130
 2007-05-16 22:45:30 +00:00
Evan Cheng
ab88e91c81 isBlockPredicable() always ignore terminal instructions; add comments. 
llvm-svn: 37126
 2007-05-16 21:54:37 +00:00
Evan Cheng
b09bf9914f ARM::tB is also predicable. 
llvm-svn: 37125
 2007-05-16 21:53:43 +00:00
Evan Cheng
973f4a19cb PredicateInstruction returns true if the operation was successful. 
llvm-svn: 37124
 2007-05-16 21:53:07 +00:00
Evan Cheng
30f3168b7b Add default implementation of PredicateInstruction(). 
llvm-svn: 37123
 2007-05-16 21:20:37 +00:00
Evan Cheng
6f761adecb Rename M_PREDICATED to M_PREDICABLE; Moved isPredicable() to MachineInstr. 
llvm-svn: 37121
 2007-05-16 20:56:08 +00:00
Evan Cheng
48f230dcb0 Move if-conversion after all passes that may use register scavenger. 
llvm-svn: 37120
 2007-05-16 20:52:46 +00:00
Evan Cheng
f7a017dfa7 Removed isPredicable(). 
llvm-svn: 37119
 2007-05-16 20:50:23 +00:00
Evan Cheng
d3f1a259db Make ARM::B isPredicable; Make Bcc and MOVCC condition option a normal operand so they are not predicable. 
llvm-svn: 37118
 2007-05-16 20:50:01 +00:00
Evan Cheng
0aced52f41 Added isPredicable bit to class Instruction. 
llvm-svn: 37117
 2007-05-16 20:47:01 +00:00
Reid Spencer
1ec1e07949 Fix a bug in the "fromString" method where radix 2,8 and 16 values were 
not being generated correctly because the shl operator does not mutate its
object but returns a new value. Also, make the distinction between radix
16 and the others more clear.

llvm-svn: 37111
 2007-05-16 19:18:22 +00:00
Reid Spencer
a89e097aa2 Avoid a "loss of precision" error in gcc 4.1.3. 
llvm-svn: 37105
 2007-05-16 16:39:29 +00:00
Duncan Sands
3296999dbb Output exception call-sites in address order, as required by the unwinding 
runtime.

llvm-svn: 37104
 2007-05-16 12:12:23 +00:00
Evan Cheng
6943cefdcd Conditional branch is not a barrier. 
llvm-svn: 37103
 2007-05-16 07:45:54 +00:00
Chris Lattner
a18b36cf45 Use a ptr set instead of a linear search to unique TokenFactor operands. 
This fixes PR1423

llvm-svn: 37102
 2007-05-16 06:37:59 +00:00
Chris Lattner
e67947b38f implement the missing maskmovq mmx intrinsic that akor hit. 
llvm-svn: 37100
 2007-05-16 06:08:17 +00:00
Evan Cheng
c149ee9f00 Fix comment. 
llvm-svn: 37098
 2007-05-16 05:14:06 +00:00
Evan Cheng
3fb34a4fdd Devang points out that we need an assertion here. 
llvm-svn: 37097
 2007-05-16 05:11:10 +00:00
Reid Spencer
3c3aa55322 Implement printing of instruction result values when debug info is turned 
on. This helps to speed up the debugging time by showing computational
results as the program executes.

llvm-svn: 37095
 2007-05-16 02:05:13 +00:00
Evan Cheng
a781c7788a Bug fix: should check ABI alignment, not pref. alignment. 
llvm-svn: 37094
 2007-05-16 02:04:50 +00:00
Evan Cheng
34928ae31f Hooks for predication support. 
llvm-svn: 37093
 2007-05-16 02:01:49 +00:00
Evan Cheng
aafca4d4a2 Initial commit of (very basic) if converter. 
llvm-svn: 37092
 2007-05-16 02:00:57 +00:00
Dale Johannesen
78ae2e1acb Remove extra CFG edges before doing these passes; it makes them happier. 
llvm-svn: 37089
 2007-05-15 21:19:17 +00:00
Lauro Ramos Venancio
251ea5ab65 Fix an infinite recursion in GetNegatedExpression. 
llvm-svn: 37086
 2007-05-15 17:05:43 +00:00