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5210 Commits

Author SHA1 Message Date
Chris Lattner
ef554846f0 fix RewriteStoreUserOfWholeAlloca to use the correct type size 
method, fixing a crash on PR4146.  While the store will 
ultimately overwrite the "padded size" number of bits in memory,
the stored value may be a subset of this size.  This function
only wants to handle the case where all bits are stored.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@71224 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-05-08 15:54:41 +00:00
Nick Lewycky
48f95ad971 This transform requires valid TargetData info. Wrap it in 'if (TD)' in 
preparation for the day we use null TargetData when no target is specified.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@71210 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-05-08 06:47:37 +00:00
Eli Friedman
5877ad7e90 PR4123: don't crash when inlining a call which uses its own result. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@71199 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-05-08 00:22:04 +00:00
Dan Gohman
31e4c77fae Perform constant folding on operands of instructions with non-void 
types, such as loads and calls.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@71175 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-05-07 19:43:39 +00:00
Evan Cheng
ee08da8956 Unbreak the build. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@71091 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-05-06 18:00:56 +00:00
David Greene
e19c840d6c Make sure to use signed arithmetic in APInt to fix a regression. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@71090 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-05-06 17:39:26 +00:00
Dan Gohman
e9d87f4906 Simplify code by using SmallVector's pop_back_val() instead of 
separate back() and pop_back() calls.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@71089 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-05-06 17:22:41 +00:00
Duncan Sands
cfd0ebea27 Fix PR3754: don't mark functions that wrap MallocInst with 
the readnone.  Since MallocInst is scheduled for deletion
it doesn't seem worth doing anything more subtle, such as
having mayWriteToMemory return true for MallocInst.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@71077 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-05-06 08:42:00 +00:00
Duncan Sands
7af1c78b98 Allow readonly functions to unwind exceptions. Teach 
the optimizers about this.  For example, a readonly
function with no uses cannot be removed unless it is
also marked nounwind.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@71071 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-05-06 06:49:50 +00:00
Dan Gohman
ce174f8e15 Fix a copy+pasto in a comment. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@71035 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-05-05 23:02:38 +00:00
Dan Gohman
4221ae84ef Delete a FIXME which is no longer relevant, and add a FIXME that is. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@71033 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-05-05 22:59:55 +00:00
Bill Wendling
a48941087b Temporarily reverting r71008. It was causing this failure: 
Running /Volumes/Sandbox/Buildbot/llvm/full-llvm/build/llvm.src/test/
CodeGen/X86/dg.exp ...
FAIL: /Volumes/Sandbox/Buildbot/llvm/full-llvm/build/llvm.src/test/
CodeGen/X86/change-compare-stride-1.ll
Failed with exit(1) at line 2
while running: grep {cmpq       $-478,} change-compare-stride-1.ll.tmp
child process exited abnormally



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@71013 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-05-05 20:49:46 +00:00
David Greene
58deef5559 Handle overflow of 64-bit loop conditions. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@71008 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-05-05 20:22:36 +00:00
Dan Gohman
35738ac150 Re-apply 70645, converting ScalarEvolution to use 
CallbackVH, with fixes. allUsesReplacedWith need to
walk the def-use chains and invalidate all users of a
value that is replaced. SCEVs of users need to be
recalcualted even if the new value is equivalent. Also,
make forgetLoopPHIs walk def-use chains, since any
SCEV that depends on a PHI should be recalculated when
more information about that PHI becomes available.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@70927 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-05-04 22:30:44 +00:00
Dan Gohman
622ed671b9 Constify a bunch of SCEV-using code. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@70919 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-05-04 22:02:23 +00:00
Mike Stump
fe095f39e7 Restore minor deletion. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@70892 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-05-04 18:40:41 +00:00
Dan Gohman
f9a77b77c2 Revert r70645 for now; it's causing a variety of regressions. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@70661 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-05-03 05:46:20 +00:00
Nick Lewycky
0e670dfa27 Revert r70630. Go back to appending ".b" to internal globals when shrinking 
them to bool.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@70653 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-05-03 03:49:08 +00:00
Dan Gohman
db6fa29641 Convert ScalarEvolution to use CallbackVH for its internal map. This 
makes ScalarEvolution::deleteValueFromRecords, and it's code that
subtly needed to be called before ReplaceAllUsesWith, unnecessary.

It also makes ValueDeletionListener unnecessary.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@70645 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-05-02 21:19:20 +00:00
Dan Gohman
e66f6f15e6 The second argument to RecursivelyDeleteTriviallyDeadInstructions has 
a default value, and will hopefully be going away soon.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@70642 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-05-02 20:22:10 +00:00
Dan Gohman
afc36a9520 Previously, RecursivelyDeleteDeadInstructions provided an option 
of returning a list of pointers to Values that are deleted. This was
unsafe, because the pointers in the list are, by nature of what
RecursivelyDeleteDeadInstructions does, always dangling. Replace this
with a simple callback mechanism. This may eventually be removed if
all clients can reasonably be expected to use CallbackVH.

Use this to factor out the dead-phi-cycle-elimination code from LSR
utility function, and generalize it to use the
RecursivelyDeleteTriviallyDeadInstructions utility function.

This makes LSR more aggressive about eliminating dead PHI cycles;
adjust tests to either be less trivial or to simply expect fewer
instructions.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@70636 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-05-02 18:29:22 +00:00
Dan Gohman
9a936502fa Tell ScalarEvolution that the loop is being deleted before actually 
deleting it.  This will let ScalarEvolution be more complete about
updating its records.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@70632 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-05-02 17:29:26 +00:00
Nick Lewycky
0e80b7cda1 Don't append ".b" to the names of globals that are being shrunk to booleans. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@70630 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-05-02 16:21:50 +00:00
Dan Gohman
1dcad96dc6 Don't split critical edges during the AddUsersIfInteresting phase 
of LSR. This makes the AddUsersIfInteresting phase of LSR a pure
analysis instead of a phase that potentially does CFG modifications.

The conditions where this code would actually perform a split are
rare, and in the cases where it actually would do a split the split
is usually undone by CodeGenPrepare, and in cases where splits
actually survive into codegen, they appear to hurt more often than
they help.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@70625 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-05-02 05:36:01 +00:00
Dan Gohman
9f2d671b15 Make RequiresTypeConversion canonicalize the types before calling the 
target hooks canLosslesslyBitCastTo and isTruncateFree. This allows
targets to avoid worrying about handling all combinations of integer
and pointer types.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@70555 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-05-01 17:07:43 +00:00
Dan Gohman
3d81e31724 Minor whitespace fix. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@70551 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-05-01 16:56:32 +00:00
Dan Gohman
cc2ad058b3 Fix some code to work if TargetLowering is not available. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@70546 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-05-01 16:29:14 +00:00
Dale Johannesen
22523ad737 Print correct instruction in dump. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@70427 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-04-29 22:57:20 +00:00
Dan Gohman
f159ccd1cd Reword and tidy up some comments. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@70416 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-04-29 22:01:05 +00:00
Dan Gohman
d908adf2ec Remove an obsolete comment. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@70262 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-04-27 22:12:34 +00:00
Dale Johannesen
617d108a63 Fix PR 4086, a bug in FP IV elimination. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@70247 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-04-27 21:03:15 +00:00
Dan Gohman
c7749b747e Permit ChangeCompareStride to rewrite a comparison when the factor 
between the comparison's iv stride and the candidate stride is
exactly -1.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@70244 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-04-27 20:35:32 +00:00
Dan Gohman
2fe4d0aacb Return null instead of false, as appropriate. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@70054 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-04-25 17:28:45 +00:00
Dan Gohman
1c8491ecc7 Add several more icmp simplifications. Transform signed comparisons 
into unsigned ones when the operands are known to have the same
sign bit value.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@70053 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-04-25 17:12:48 +00:00
Sanjiv Gupta
7787d4a34b Allow i16 type indices to gep. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@69946 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-04-24 02:37:54 +00:00
Dan Gohman
752ec7da50 Change SCEVExpander's expandCodeFor to provide more flexibility 
with the persistent insertion point, and change IndVars to make
use of it. This fixes a bug where IndVars was holding on to a
stale insertion point and forcing the SCEVExpander to continue to
use it.

This fixes PR4038.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@69892 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-04-23 15:16:49 +00:00
Evan Cheng
9c15949967 Make sure both operands have binary instructions have the same type. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@69844 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-04-22 23:39:28 +00:00
Evan Cheng
a8d4d7fe47 A few more places where the check of use_empty is needed. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@69842 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-04-22 23:09:16 +00:00
Evan Cheng
1abe64663e Avoid deferencing use_begin() if value does not have a use. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@69836 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-04-22 22:45:37 +00:00
Owen Anderson
7db2789251 Real fix for PR3549, by using caching for predecessor counts in addition to the predecessors themselves. This halves the time 
to optimize the testcase, beyond what my previous patch did.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@69792 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-04-22 08:50:12 +00:00
Owen Anderson
68fbd735f1 Use PredIteratorCache in LCSSA, which gives a 37% overall speedup on the testcase from PR3549. More improvements to come. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@69788 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-04-22 08:09:13 +00:00
Chris Lattner
41b1a489f5 use predicate instead of hand-rolled loop 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@69752 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-04-21 23:37:18 +00:00
Chris Lattner
33e24adc3b fix a crash on a pointless but valid zero-length memset, rdar://6808691 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@69680 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-04-21 16:52:12 +00:00
Dan Gohman
84923602fd Factor out a common base class from SCEVTruncateExpr, SCEVZeroExtendExpr, 
and SCEVSignExtendExpr.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@69649 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-04-21 01:25:57 +00:00
Dan Gohman
af79fb5f47 Introduce encapsulation for ScalarEvolution's TargetData object, and refactor 
the code to minimize dependencies on TargetData.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@69644 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-04-21 01:07:12 +00:00
Dale Johannesen
23300aa3e3 Adjust loop size estimate for full unrolling; 
GEP's don't usually become instructions.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@69631 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-04-20 22:19:33 +00:00
Sanjiv Gupta
428098de62 Before trying to introduce/eliminate cast/ext/trunc to make indices type as 
pointer type, make sure that the pointer size is a valid sequential index type.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@69574 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-04-20 06:05:54 +00:00
Dan Gohman
890f92b744 Use more const qualifiers with SCEV interfaces. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@69450 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-04-18 17:56:28 +00:00
Jim Grosbach
46445389d3 remove trailing whitespace 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@69402 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-04-17 23:30:55 +00:00
David Greene
5b7dfbd89a Use a safer iterator interface and get rid of std C++ library misuse. 
This fixes a --enable-expensive-checks problem.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@69353 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-04-17 14:56:18 +00:00