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6990 Commits

Author SHA1 Message Date
Dan Gohman
a209503467 Use MapValue in the Linker instead of having a private function 
which does the same thing. This eliminates redundant code and
handles MDNodes better. MDNode linking still doesn't fully
work yet though.

llvm-svn: 111941
 2010-08-24 18:50:07 +00:00
Owen Anderson
7c853e877e Turn LVI on, previously detected failures should be fixed now. 
llvm-svn: 111923
 2010-08-24 17:21:18 +00:00
Dan Gohman
6901283544 MapValue support for MDNodes. This is similar to r109117, except 
that it avoids a lot of unnecessary cloning by avoiding remapping
MDNode cycles when none of the nodes in the cycle actually need to
be remapped. Also it uses the new temporary MDNode mechanism.

llvm-svn: 111922
 2010-08-24 17:10:10 +00:00
Owen Anderson
6ffa3f2aea Turn LVI back off, I have a testcase now. 
llvm-svn: 111834
 2010-08-23 19:59:27 +00:00
Owen Anderson
630add39a6 Re-enable LazyValueInfo. Monitoring for failures. 
llvm-svn: 111816
 2010-08-23 18:12:23 +00:00
Owen Anderson
d31d82d75c Now that PassInfo and Pass::ID have been separated, move the rest of the passes over to the new registration API. 
llvm-svn: 111815
 2010-08-23 17:52:01 +00:00
Owen Anderson
84c29a096b Re-apply r111568 with a fix for the clang self-host. 
llvm-svn: 111665
 2010-08-20 18:24:43 +00:00
Owen Anderson
43057cd56a Revert r111568 to unbreak clang self-host. 
llvm-svn: 111571
 2010-08-19 23:25:16 +00:00
Owen Anderson
bb723b228a When a set of bitmask operations, typically from a bitfield initialization, only modifies the low bytes of a value, 
we can narrow the store to only over-write the affected bytes.

llvm-svn: 111568
 2010-08-19 22:15:40 +00:00
Owen Anderson
aac8cbb261 Disable LVI while I evaluate a failure. 
llvm-svn: 111551
 2010-08-19 19:47:08 +00:00
Owen Anderson
5c87dd55d3 Tentatively enabled LVI by default. I'll be monitoring for any failures. 
llvm-svn: 111543
 2010-08-19 19:04:40 +00:00
Dan Gohman
129a816ee6 Process the step before the start, because it's usually the simpler 
of the two.

llvm-svn: 111495
 2010-08-19 01:02:31 +00:00
Owen Anderson
208636fa33 Inform LazyValueInfo whenever a block is deleted, to avoid dangling pointer issues. 
llvm-svn: 111382
 2010-08-18 18:39:01 +00:00
Chris Lattner
3c603024bb Fix PR7755: knowing something about an inval for a pred 
from the LHS should disable reconsidering that pred on the
RHS.  However, knowing something about the pred on the RHS
shouldn't disable subsequent additions on the RHS from
happening.

llvm-svn: 111349
 2010-08-18 03:14:36 +00:00
Chris Lattner
f0b5b67ba5 fit in 80 cols 
llvm-svn: 111348
 2010-08-18 03:13:35 +00:00
Chris Lattner
b45de95345 remove some dead code. 
llvm-svn: 111344
 2010-08-18 02:41:56 +00:00
Chris Lattner
6aabb66139 remove dead prototype. 
llvm-svn: 111342
 2010-08-18 02:37:06 +00:00
Eric Christopher
51edc7b7e1 Temporarily revert r110987 as it's causing some miscompares in 
vector heavy code.  I'll re-enable when we've tracked down the problem.

llvm-svn: 111318
 2010-08-17 22:55:27 +00:00
Dan Gohman
5047ca0c02 When rotating loops, put the original header at the bottom of the 
loop, making the resulting loop significantly less ugly.  Also, zap
its trivial PHI nodes, since it's easy.

llvm-svn: 111255
 2010-08-17 17:39:21 +00:00
Dan Gohman
941020ed72 Use the getUniquePredecessor() utility function, instead of doing 
what it does manually.

llvm-svn: 111248
 2010-08-17 17:07:02 +00:00
Evan Cheng
8b637b177c Add an option to disable codegen prepare critical edge splitting. In theory, PHI elimination is already doing all (most?) of the splitting needed. But machine-licm and machine-sink seem to miss some important optimizations when splitting is disabled. 
llvm-svn: 111224
 2010-08-17 01:34:49 +00:00
Dan Gohman
89fdbaf99a Instead of having CollectSubexpr's categorize operands as interesting or 
uninteresting, just put all the operands on one list and make
GenerateReassociations make the decision about what's interesting.
This is simpler, and it avoids an extra ScalarEvolution::getAddExpr call.

llvm-svn: 111133
 2010-08-16 15:50:00 +00:00
Dan Gohman
9b7632df26 Put add operands in ScalarEvolution-canonical order, when convenient. 
This isn't necessary, because ScalarEvolution sorts them anyway,
but it's tidier this way.

llvm-svn: 111132
 2010-08-16 15:39:27 +00:00
Dan Gohman
6e964c7fb4 Avoid #include <ScalarEvolution.h> in LoopSimplify.cpp, which doesn't 
actually use ScalarEvolution.

llvm-svn: 111124
 2010-08-16 14:44:03 +00:00
Dan Gohman
250b754428 Instead, teach SimplifyCFG to trim non-address-taken blocks from 
indirectbr destination lists.

llvm-svn: 111122
 2010-08-16 14:41:14 +00:00
Dan Gohman
aa445c0751 LoopSimplify shouldn't split loop backedges that use indirectbr. PR7867. 
llvm-svn: 111061
 2010-08-14 00:43:09 +00:00
Dan Gohman
4a63fad976 Teach SimplifyCFG how to simplify indirectbr instructions. 
- Eliminate redundant successors.
 - Convert an indirectbr with one successor into a direct branch.

Also, generalize SimplifyCFG to be able to be run on a function entry block.
It knows quite a few simplifications which are applicable to the entry
block, and it only needs a few checks to avoid trouble with the entry block.

llvm-svn: 111060
 2010-08-14 00:29:42 +00:00
Dan Gohman
081ffcd00b Fix LSR's ExtractImmediate and ExtractSymbol to avoid calling 
ScalarEvolution::getAddExpr, which can be pretty expensive, when nothing
has changed, which is pretty common.

llvm-svn: 111042
 2010-08-13 21:17:19 +00:00
Nate Begeman
2a0ca3e937 Reapply this transformation now that it is passing the external test which it previously failed. 
llvm-svn: 110987
 2010-08-13 00:17:53 +00:00
Chris Lattner
363226dfe8 fix PR7876: If ipsccp decides that a function's address is taken 
before it rewrites the code, we need to use that in the post-rewrite pass.

llvm-svn: 110962
 2010-08-12 22:25:23 +00:00
Eric Christopher
ac40d49c70 Temporarily revert 110737 and 110734, they were causing failures 
in an external testsuite.

llvm-svn: 110905
 2010-08-12 07:01:22 +00:00
Nate Begeman
265363061e Add the minimal amount of smarts necessary to instcombine of shufflevectors to recognize 
patterns generated by clang for transpose of a matrix in generic vectors.  This is made
of two parts:

1) Propagating vector extracts of hi/lo half into their users
2) Recognizing an insertion of even elements followed by the odd elements as an unpack.

Testcase to come, but this shrinks the # of shuffle instructions generated on x86 from ~40 to the minimal 8.

llvm-svn: 110734
 2010-08-10 21:38:12 +00:00
Nick Lewycky
f0067b668c Fix a use after free error caught by the valgrind builders. 
llvm-svn: 110601
 2010-08-09 21:03:28 +00:00
Eli Friedman
f99e7e6643 PR7853: fix a silly mistake introduced in r101899, and add a test to make sure 
it doesn't regress again.

llvm-svn: 110597
 2010-08-09 20:49:43 +00:00
Nick Lewycky
fbd2757cde Do more to modernize MergeFunctions. Refactor in response to Chris' code review. 
llvm-svn: 110538
 2010-08-08 05:04:23 +00:00
Owen Anderson
0398607714 Don't attempt the PRE inline asm calls, since we don't value number them yet. Fixes PR7835. 
llvm-svn: 110489
 2010-08-07 00:20:35 +00:00
Dan Gohman
0f7892b8ae Eliminate PromoteMemoryToRegisterID; just use addPreserved("mem2reg") 
instead, as an example of what this looks like.

llvm-svn: 110478
 2010-08-06 21:48:06 +00:00
Owen Anderson
a7aed18624 Reapply r110396, with fixes to appease the Linux buildbot gods. 
llvm-svn: 110460
 2010-08-06 18:33:48 +00:00
Nick Lewycky
5a2849e166 Fix uninitialized variable warning. 
Also move 'default' case next to a real case to help compiler optimize in
non-Debug builds.
No functionality change.

llvm-svn: 110435
 2010-08-06 07:43:46 +00:00
Nick Lewycky
f216f69ad9 Work in progress, cleaning up MergeFuncs. 
Further clean up the comparison function by removing overly generalized
"domains".
Remove all understanding of ELF aliases and simplify folding code and comments.

llvm-svn: 110434
 2010-08-06 07:21:30 +00:00
Owen Anderson
bda59bd247 Revert r110396 to fix buildbots. 
llvm-svn: 110410
 2010-08-06 00:23:35 +00:00
Owen Anderson
755aceb5d0 Don't use PassInfo* as a type identifier for passes. Instead, use the address of the static 
ID member as the sole unique type identifier.  Clean up APIs related to this change.

llvm-svn: 110396
 2010-08-05 23:42:04 +00:00
Owen Anderson
4674dd6cf5 Give JumpThreading+LVI a long-form cl::opt so that it's easier to toggle the default. 
llvm-svn: 110384
 2010-08-05 22:11:31 +00:00
Owen Anderson
9f2bca02d7 Experiments show that we can safely increase our unrolling threshold without unduly impacting code size, particularly 
since unrolling is not enabled at -Os.

llvm-svn: 110233
 2010-08-04 18:32:46 +00:00
Dan Gohman
ba81fc16a5 Fix whitespace. 
llvm-svn: 110223
 2010-08-04 17:43:57 +00:00
Dan Gohman
839c972102 Fix a comment. 
llvm-svn: 110181
 2010-08-04 01:16:35 +00:00
Dan Gohman
5442c71f2e Thread const correctness through a bunch of AliasAnalysis interfaces and 
eliminate several const_casts.

Make CallSite implicitly convertible to ImmutableCallSite.

Rename the getModRefBehavior for intrinsic IDs to
getIntrinsicModRefBehavior to avoid overload ambiguity with CallSite,
which happens to be implicitly convertible to bool.

llvm-svn: 110155
 2010-08-03 21:48:53 +00:00
Dan Gohman
3619660529 Make instcombine set explicit alignments on load or store 
instructions with alignment 0, so that subsequent passes don't
need to bother checking the TargetData ABI size manually.

llvm-svn: 110128
 2010-08-03 18:20:32 +00:00
Peter Collingbourne
ddaaf40d24 Add an atomic lowering pass 
llvm-svn: 110113
 2010-08-03 16:19:16 +00:00
Dan Gohman
35e8a6209d Use unary + instead of a separate local variable for working 
around std::min vs static const friction.

llvm-svn: 110112
 2010-08-03 16:15:50 +00:00