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ec933b857e
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2519 Commits

Author SHA1 Message Date
Benjamin Kramer
ec933b857e InstSimplify: Don't try to replace an extractvalue/insertvalue pair with the original value if types don't match. 
Fixes clang selfhost.

llvm-svn: 139120
 2011-09-05 18:16:19 +00:00
Duncan Sands
d883f9f371 Delete trivial landing pads that just continue unwinding the caught 
exception.

llvm-svn: 139117
 2011-09-05 12:57:57 +00:00
Duncan Sands
a74d10bb60 Add some simple insertvalue simplifications, for the purpose of cleaning 
up do-nothing exception handling code produced by dragonegg.

llvm-svn: 139113
 2011-09-05 06:52:48 +00:00
Bill Wendling
145872a92c Try to eliminate the use of the 'unwind' instruction. 
llvm-svn: 139046
 2011-09-02 22:41:11 +00:00
Andrew Trick
f449c87835 Test case update for unroll-scev. 
llvm-svn: 139037
 2011-09-02 21:21:03 +00:00
Jakub Staszak
fef314417c Extra CHECK-NOT to make sure that GVN transform works properly. 
llvm-svn: 139012
 2011-09-02 17:40:39 +00:00
Andrew Trick
88877293d1 -unroll-scev flag removal 
llvm-svn: 139010
 2011-09-02 17:36:14 +00:00
Jakub Staszak
132e24bf28 ConstantVector returns arbitrary value for the wrong index. 
This fixes PR10813.

llvm-svn: 139006
 2011-09-02 15:43:43 +00:00
Jakub Staszak
b82758ae9b Compare type size instead of type _store_ size to make sure that BitCastInst 
will be valid. This fixes PR10820.

llvm-svn: 139005
 2011-09-02 14:57:37 +00:00
Bill Wendling
a96c532f67 Update to new EH scheme. 
llvm-svn: 138989
 2011-09-02 01:25:11 +00:00
Eli Friedman
2f99e7b97a Fix test; sorry for any inconvenience. 
llvm-svn: 138966
 2011-09-01 21:25:42 +00:00
Eli Friedman
00a62b2122 Fix an issue with the IR sink pass found by inspection. (I'm not sure anyone is actually using this, but might as well fix it since I found the issue.) 
llvm-svn: 138965
 2011-09-01 21:21:24 +00:00
Eli Friedman
a154929048 Add missing newline. 
llvm-svn: 138964
 2011-09-01 21:20:11 +00:00
Bill Wendling
196167f986 Update to new EH scheme. 
llvm-svn: 138933
 2011-09-01 01:28:25 +00:00
Bill Wendling
68ada987a1 Update to new EH scheme. 
llvm-svn: 138928
 2011-09-01 01:08:21 +00:00
Bill Wendling
6ebcfea89e Update to new EH scheme. 
llvm-svn: 138927
 2011-09-01 01:02:41 +00:00
Bill Wendling
0b2e131798 Update some tests to the new EH scheme. 
llvm-svn: 138925
 2011-09-01 00:58:03 +00:00
Bill Wendling
f3c35d972d Reenable test. 
llvm-svn: 138916
 2011-08-31 23:08:05 +00:00
Bill Wendling
fc2565227c Revert accidental commit 
llvm-svn: 138915
 2011-08-31 23:07:46 +00:00
Eli Friedman
5e68a0aca8 Disable this test until Bill fixes it properly. 
llvm-svn: 138914
 2011-08-31 23:03:30 +00:00
Bill Wendling
8b764c6aa5 Update to new EH scheme. 
llvm-svn: 138908
 2011-08-31 21:50:07 +00:00
Bill Wendling
aca68bbe94 Update more tests to the new EH scheme. 
llvm-svn: 138903
 2011-08-31 21:39:05 +00:00
Eli Friedman
da555beef1 Add tests for the transformations SCCP can do on atomic loads and stores (which are safe without any modifications). 
llvm-svn: 138902
 2011-08-31 21:37:06 +00:00
Bill Wendling
722de8a9aa Update more tests to the new EH scheme. 
llvm-svn: 138894
 2011-08-31 21:04:11 +00:00
Bill Wendling
7014c485f5 Update the tests to the new EH scheme. 
llvm-svn: 138891
 2011-08-31 20:55:40 +00:00
Rafael Espindola
3bb0f9391c Remove the old tail duplication pass. It is not used and is unable to update 
ssa, so it has to be run really early in the pipeline. Any replacement
should probably use the SSAUpdater.

llvm-svn: 138841
 2011-08-30 23:03:45 +00:00
Owen Anderson
58a5ca1320 Remove empty file. 
llvm-svn: 138830
 2011-08-30 21:17:20 +00:00
Owen Anderson
d3a9f00a58 Speculatively revert r138809 in an attempt to fix DragonEgg. 
llvm-svn: 138829
 2011-08-30 21:11:06 +00:00
Owen Anderson
3ec8beb8c8 When walking backwards to eliminate final stores to allocas at the end of a function, encountering an unrelated store should not cause us to give up like encountering a load does. 
llvm-svn: 138809
 2011-08-30 18:51:55 +00:00
Bill Wendling
87d029bc27 Update tests to new EH model. Add landingpad instructions to landing pads. 
llvm-svn: 138759
 2011-08-29 20:39:23 +00:00
Nadav Rotem
43912ff374 Fixes following the CR by Chris and Duncan: 
Optimize chained bitcasts of the form A->B->A.
Undo r138722 and change isEliminableCastPair to allow this case.

llvm-svn: 138756
 2011-08-29 19:58:36 +00:00
Nadav Rotem
6280c8eecc Bitcasts are transitive. Bitcast-Bitcast-X becomes Bitcast-X. 
llvm-svn: 138722
 2011-08-28 11:51:08 +00:00
Bill Wendling
b0412973be Auto upgrade the old EH scheme to use the new one. This is on a trial basis. If 
things to disasterously over night, this can be reverted.

llvm-svn: 138702
 2011-08-27 06:11:03 +00:00
Bill Wendling
400ec8bd8f Don't sink landingpad instructions during ind-var simplification. 
llvm-svn: 138651
 2011-08-26 20:40:15 +00:00
Andrew Trick
f20e2ff394 Use %% for literals in RUN lines. 
llvm-svn: 138647
 2011-08-26 20:09:48 +00:00
Benjamin Kramer
dc1c57af91 SimplifyCFG: If we have a PHI node that can evaluate to NULL and do a load or store to the address returned by the PHI node then we can consider this incoming value as dead and remove the edge pointing there, unless there are instructions that can affect control flow executed in between. 
In theory this could be extended to other instructions, eg. division by zero, but it's likely that it will "miscompile" some code because people depend on div by zero not trapping. NULL pointer dereference usually leads to a crash so we should be on the safe side.

This shrinks the size of a Release clang by 16k on x86_64.

llvm-svn: 138618
 2011-08-26 01:22:29 +00:00
Nadav Rotem
43673d6d0b Implement Constant::isAllOnesValue(). Fix ConstantFolding to use the new api. 
llvm-svn: 138469
 2011-08-24 20:18:38 +00:00
Eric Christopher
aa4993b9aa Revert "Address Duncan's CR request:" 
This reverts commit 20a05be15ea5271ab6185b83200fa88263362400. (svn rev 138340)

Conflicts:

	test/Transforms/InstCombine/bitcast.ll

llvm-svn: 138366
 2011-08-23 20:11:10 +00:00
Nadav Rotem
442df41879 Fix a typo in the test from the previous commit. 
llvm-svn: 138342
 2011-08-23 17:56:54 +00:00
Nadav Rotem
d449bc9bff Address Duncan's CR request: 
1. Cleanup the tests in ConstantFolding.cpp
2. Implement isAllOnes for Constant, ConstantFP, ConstantVector

llvm-svn: 138340
 2011-08-23 17:48:43 +00:00
Dan Gohman
9619488506 Constant pointers to objects don't need reference counting. 
llvm-svn: 138242
 2011-08-22 17:29:11 +00:00
Dan Gohman
48e3f904c3 Make a few tests slightly more strict. 
llvm-svn: 138241
 2011-08-22 17:27:02 +00:00
Nadav Rotem
1dc1eb1ae0 Add constant folding support for bitcasts of splat vectors to integers. 
llvm-svn: 138206
 2011-08-20 14:02:29 +00:00
Eric Christopher
28fddb0c70 Add file. 
llvm-svn: 138083
 2011-08-19 21:21:20 +00:00
Dan Gohman
c5d64c76e0 Track a retain+release nesting level independently of the 
known-incremented level, because the two concepts can be used
to prove the saftey of a retain+release removal in different
ways.

llvm-svn: 138016
 2011-08-19 00:26:36 +00:00
Eli Friedman
775a316a06 Atomic load/store handling for the passes using memdep (GVN, DSE, memcpyopt). 
llvm-svn: 137888
 2011-08-17 22:22:24 +00:00
Eli Friedman
e1655eebc3 Silly mistake from r137777; restore significant isStructTy() checks. While here, be a bit more defensive 
with unknown instructions.

Fixes PR10687.

llvm-svn: 137836
 2011-08-17 18:10:43 +00:00
Eli Friedman
32bc68c480 An additional atomic test; related to r137662. 
llvm-svn: 137786
 2011-08-16 23:29:17 +00:00
Eli Friedman
b4733f623f A bunch of misc fixes to SCCPSolver::ResolvedUndefsIn, including a fix to stop 
making random bad assumptions about instructions which are not explicitly listed.  

Includes fix for rdar://9956541, a version of "undef ^ undef should return
0 because it's easier than arguing with users".

llvm-svn: 137777
 2011-08-16 22:06:31 +00:00
Eli Friedman
e0095e4339 Minor bug in SCCP found by inspection. (I don't think it's possible to hit this with a normal pass pipeline, but fixing for completeness.) 
llvm-svn: 137755
 2011-08-16 21:12:35 +00:00