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63 Commits

Author SHA1 Message Date
Dan Gohman
1add31cc93 Move Instruction::isSafeToSpeculativelyExecute out of VMCore and 
into Analysis as a standalone function, since there's no need for
it to be in VMCore. Also, update it to use isKnownNonZero and
other goodies available in Analysis, making it more precise,
enabling more aggressive optimization.

llvm-svn: 146610
 2011-12-14 23:49:11 +00:00
Chris Lattner
9d1e8420ff Upgrade syntax of tests using volatile instructions to use 'load volatile' instead of 'volatile load', which is archaic. 
llvm-svn: 145171
 2011-11-27 06:54:59 +00:00
Pete Cooper
a85aa24d64 LICM pass now understands invariant load metadata. Nothing generates this yet so it will currently never get used in real tests 
llvm-svn: 144107
 2011-11-08 19:30:00 +00:00
Eli Friedman
e18709e5b2 Atomic load/store support in LICM. 
llvm-svn: 137648
 2011-08-15 20:52:09 +00:00
Eli Friedman
baf0f69f9a Move "atomic" and "volatile" designations on instructions after the opcode 
of the instruction.

Note that this change affects the existing non-atomic load and store
instructions; the parser now accepts both forms, and the change is noted
in the release notes.

llvm-svn: 137527
 2011-08-12 22:50:01 +00:00
Eli Friedman
f98434b2c7 Bring LICM into compliance with the new "Memory Model for Concurrent Operations" in LangRef. 
llvm-svn: 135625
 2011-07-20 21:37:47 +00:00
Tobias Grosser
97b1ec50e3 LICM: Do not loose alignment on promotion 
The promotion code lost any alignment information, when hoisting loads and
stores out of the loop. This lead to incorrect aligned memory accesses. We now
use the largest alignment we can prove to be correct.

llvm-svn: 134520
 2011-07-06 19:19:55 +00:00
Chris Lattner
9ec82f54d4 manually upgrade a bunch of tests to modern syntax, and remove some that 
are either unreduced or only test old syntax.

llvm-svn: 133228
 2011-06-17 03:14:27 +00:00
Eli Friedman
d3b1c5df33 PR9604; try to deal with RAUW updates correctly in the AST. I'm not convinced 
it's completely safe to cache the AST across LICM runs even with this fix,
but this fix can't hurt.

llvm-svn: 129198
 2011-04-09 06:55:46 +00:00
Eli Friedman
a5b74c486a Test for r129190. 
llvm-svn: 129197
 2011-04-09 06:39:43 +00:00
Eli Friedman
b0e846a68c PR9634: Don't unconditionally tell the AliasSetTracker that the PreheaderLoad 
is equivalent to any other relevant value; it isn't true in general.
If it is equivalent, the LoopPromoter will tell the AST the equivalence.
Also, delete the PreheaderLoad if it is unused.

Chris, since you were the last one to make major changes here, can you check
that this is sane?

llvm-svn: 129049
 2011-04-07 01:35:06 +00:00
Devang Patel
c4e4244654 While sinking an instruction, do not lose llvm.dbg.value intrinsic. 
llvm-svn: 127214
 2011-03-08 03:06:19 +00:00
Cameron Zwarich
9d8ab7d0f7 Rename 'loopsimplify' to 'loop-simplify'. 
llvm-svn: 125317
 2011-02-10 23:38:10 +00:00
Chris Lattner
bb93cd80d6 Enhance LICM to promote alias sets whose pointers themselves are stored, 
which doesn't affect the memory address being promoted.

llvm-svn: 122172
 2010-12-19 05:57:25 +00:00
Chris Lattner
71fcecf597 fix PR8602, a bug in an assertion: a volatile store *of* a pointer 
does not make the alias set for that pointer volatile, just stores
*to* the pointer.

llvm-svn: 122171
 2010-12-19 05:51:54 +00:00
Dan Gohman
6aff5b94ff Make BasicAliasAnalysis a normal AliasAnalysis implementation which 
does normal initialization and normal chaining. Change the default
AliasAnalysis implementation to NoAlias.

Update StandardCompileOpts.h and friends to explicitly request
BasicAliasAnalysis.

Update tests to explicitly request -basicaa.

llvm-svn: 116720
 2010-10-18 18:04:47 +00:00
Devang Patel
35201e0fd6 Remove LoopIndexSplit pass. It is neither maintained nor used by anyone. 
llvm-svn: 116004
 2010-10-07 23:29:37 +00:00
Chris Lattner
0718ff9be2 fix PR8102, a case where we'd copyValue from a value that we already 
deleted.  Fix this by doing the copyValue's before we delete stuff!

The testcase only repros the problem on my system with valgrind.

llvm-svn: 113820
 2010-09-14 00:19:00 +00:00
Chris Lattner
6e6a535055 fix PR8067, an over-aggressive assertion in LICM. 
llvm-svn: 113146
 2010-09-06 05:11:24 +00:00
Chris Lattner
2b77a2a167 fix a bug in my licm rewrite when a load from the promoted memory 
location is being re-stored to the memory location.  We would get
a dangling pointer from the SSAUpdate data structure and miss a 
use.  This fixes PR8068

llvm-svn: 113042
 2010-09-04 00:12:30 +00:00
Chris Lattner
1edeb00c72 fix more AST updating bugs, correcting miscompilation in PR8041 
llvm-svn: 112878
 2010-09-02 22:19:10 +00:00
Chris Lattner
5ed5e29575 licm is wasting time hoisting constant foldable operations, 
instead of hoisting them, just fold them away.  This occurs in the
testcase for PR8041, for example.

llvm-svn: 112669
 2010-08-31 23:00:16 +00:00
Chris Lattner
51639dea34 LICM does get dead instructions input to it. Instead of sinking them 
out of loops, just delete them.

llvm-svn: 112451
 2010-08-29 18:22:25 +00:00
Devang Patel
3b08c33f33 Remove dead debug info intrinsics. 
Intrinsic::dbg_stoppoint
 Intrinsic::dbg_region_start 
 Intrinsic::dbg_region_end 
 Intrinsic::dbg_func_start
AutoUpgrade simply ignores these intrinsics now.

llvm-svn: 92557
 2010-01-05 01:10:40 +00:00
Eric Christopher
abf9df5e6d Add radar fixed in comment. 
llvm-svn: 91312
 2009-12-14 19:07:25 +00:00
Eric Christopher
02ce8cd8a6 Add a test for the fix in revision 91009. 
llvm-svn: 91062
 2009-12-10 21:11:40 +00:00
Dan Gohman
026230b0a9 Enable hoisting of loads from constant memory by default. In cases where 
they are lowered to instruction sequences more complex than a simple
load, such that CodeGen cannot rematerialize them, a reload from a
spill slot is likely to be cheaper than the complex sequence.

llvm-svn: 89374
 2009-11-19 19:00:10 +00:00
Edward O'Callaghan
e9e8913261 Convert a few tests to FileCheck for PR5307. 
llvm-svn: 85171
 2009-10-26 22:52:03 +00:00
Dan Gohman
6e2d1c608b Make these tests more interesting by using 
-verify-dom-info and -verify-loop-info, which enable additional
(expensive) consistency checks.

llvm-svn: 85017
 2009-10-24 23:23:04 +00:00
Torok Edwin
ed37f33b81 LICM shouldn't sink/delete debug information. Fix this and add a testcase. 
For now the metadata of sinked/hoisted instructions is still wrong, but that'll
be fixed when instructions will have debug metadata directly attached.

llvm-svn: 83786
 2009-10-11 19:15:54 +00:00
Dan Gohman
205b641954 Change tests from "opt %s" to "opt < %s" so that opt doesn't see the 
input filename so that opt doesn't print the input filename in the
output so that grep lines in the tests don't unintentionally match
strings in the input filename.

llvm-svn: 81537
 2009-09-11 18:01:28 +00:00
Dan Gohman
c95df8b6d8 Use opt -S instead of piping bitcode output through llvm-dis. 
llvm-svn: 81257
 2009-09-08 22:34:10 +00:00
Dan Gohman
8d84372836 Change these tests to feed the assembly files to opt directly, instead 
of using llvm-as, now that opt supports this.

llvm-svn: 81226
 2009-09-08 16:50:01 +00:00
Chris Lattner
bfb4e6a9d3 rename test 
llvm-svn: 80523
 2009-08-30 22:14:17 +00:00
Chris Lattner
31fd178e21 merge all sinking tests into one and convert them to filecheck. 
llvm-svn: 80522
 2009-08-30 22:13:26 +00:00
Chris Lattner
0715defcef convert scalar_promote to filecheck style and merge 2003-12-13-VolatilePromote.ll into it. 
llvm-svn: 80521
 2009-08-30 22:08:19 +00:00
Devang Patel
8c31ea5290 Before deleting a basic block, give other loop passes a chance cleanup analysis values, related to the instructions in the basic block. 
llvm-svn: 67719
 2009-03-25 23:57:48 +00:00
Owen Anderson
42c1d6c7b9 Remove GCSE and LoadVN from the testsuite. 
llvm-svn: 54832
 2008-08-16 00:00:54 +00:00
Dan Gohman
1ecbcecdf3 Put the LICM of constant GlobalVariables, introduced in r53945, under a 
command-line option, and disable it by default. It introduced performance
regressions because CodeGen is currently not able to remat such loads.

llvm-svn: 53997
 2008-07-24 23:57:25 +00:00
Chris Lattner
8eb899ecbc "Allow LICM to sink or lift loads from constant memory. Also add a test 
case for this.

This allows instructions like loads from global variables declared to
be constant to be moved out of loops."

Patch by Stefanus Du Toit!

llvm-svn: 53945
 2008-07-23 05:06:28 +00:00
Chris Lattner
821dc30131 Fix PR2346 by marking vaarg as volatile so that licm doesn't try to 
hoist them.

llvm-svn: 51356
 2008-05-20 22:05:28 +00:00
Gabor Greif
807c2df887 sabre brings to my attention that the 'tr' suffix is also obsolete 
llvm-svn: 51349
 2008-05-20 21:00:03 +00:00
Gabor Greif
d8a4dbb5da Rename the last test with .llx extension to .ll, resolve duplicate test by renaming to isnan2. Now that no test has llx ending there is no need to search for them from dg.exp too. 
llvm-svn: 51328
 2008-05-20 19:52:04 +00:00
Owen Anderson
79a25ff8ec Use loop deletion instead of ADCE in these tests. 
llvm-svn: 51180
 2008-05-16 04:33:37 +00:00
Chris Lattner
a9d8d647ca rename *.llx -> *.ll, last batch. 
llvm-svn: 49971
 2008-04-19 22:32:52 +00:00
Tanya Lattner
0721aaa8f7 Remove llvm-upgrade and update tests. 
llvm-svn: 48527
 2008-03-19 03:47:13 +00:00
Bill Wendling
e6898cbe7a Update this testcase. The output needs to be disabled to pass. 
llvm-svn: 45478
 2008-01-01 01:34:36 +00:00
Duncan Sands
265752ae8f Ding dong, the DoesntAccessMemoryFns and 
OnlyReadsMemoryFns tables are dead!  We
get more, and more accurate, information
from gcc via the readnone and readonly
function attributes.

llvm-svn: 44288
 2007-11-23 19:30:27 +00:00
Devang Patel
42f006a51a Relax unsafe use check. If there is one unconditional use inside the loop then it is safe to promote value even if there is another conditional use inside the loop. 
llvm-svn: 42493
 2007-10-01 18:12:58 +00:00
Devang Patel
65f8d0c2d7 Do not promote null values because it may be unsafe to do so. 
llvm-svn: 42270
 2007-09-24 20:02:42 +00:00