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47 Commits

Author SHA1 Message Date
Dan Gohman
5dd6f54a5f Teach BasicAliasAnalysis to understand constant gep indices that fall 
beyond their associated static array type.

I believe that this fixes a legitimate bug, because BasicAliasAnalysis
already has code to check for this condition that works for non-constant
indices, however it was missing the case of constant indices. With this
change, it checks for both.

This fixes PR4267, and miscompiles of SPEC 188.ammp and 464.h264.href.

llvm-svn: 72451
 2009-05-27 01:48:27 +00:00
Chris Lattner
f8afc9ecda change this to test for an alias result more directly. 
llvm-svn: 67046
 2009-03-16 18:28:27 +00:00
Nick Lewycky
d271c19fea Add a replacement for 2009-02-12-GEPNoalias.ll that works without -debug. 
llvm-svn: 67011
 2009-03-14 19:40:09 +00:00
Chris Lattner
5972bc6234 remove a buggy test, it is not ok to use -debug in RUN line. 
llvm-svn: 66918
 2009-03-13 18:19:34 +00:00
Nick Lewycky
f6c8dc0825 BasicAA was making the assumption that a local allocation which hadn't escaped 
couldn't ever be the return of call instruction. However, it's quite possible
that said local allocation is itself the return of a function call. That's
what malloc and calloc are for, actually.

llvm-svn: 64442
 2009-02-13 07:06:27 +00:00
Owen Anderson
c418b82207 Finish making AliasAnalysis aware of the fact that most atomic intrinsics only dereference their arguments, and enhance 
BasicAA to make use of this fact when computing ModRef info.

llvm-svn: 63718
 2009-02-04 05:16:46 +00:00
Nick Lewycky
8f96b51785 Resubmit support for the 'nocapture' attribute. 
The problematic part of this patch is that we were out of attribute bits,
requiring some fancy bit hacking to make it fit (by shrinking alignment)
without breaking existing users or the file format.

This change will require users to rebuild llvm-gcc to match llvm.

llvm-svn: 61239
 2008-12-19 06:39:12 +00:00
Bill Wendling
905350a341 Remove empty test. 
llvm-svn: 61095
 2008-12-16 19:07:17 +00:00
Bill Wendling
f807a68f2e Temporarily revert r61019, r61030, and r61040. These were breaking LLVM Release 
builds.

llvm-svn: 61094
 2008-12-16 19:06:48 +00:00
Chris Lattner
0e79aa6595 Teach basicaa to use the nocapture attribute when possible. When the 
intrinsics are properly marked nocapture, the fixme should be addressed.

llvm-svn: 61040
 2008-12-15 18:59:22 +00:00
Chris Lattner
e2b5854e41 Allow basicaa to walk through geps with identical indices in 
parallel, allowing it to decide that P/Q must alias if A/B
must alias in things like:
 P = gep A, 0, i, 1
 Q = gep B, 0, i, 1

This allows GVN to delete 62 more instructions out of 403.gcc.

llvm-svn: 60820
 2008-12-10 01:04:47 +00:00
Nick Lewycky
47fa9bd187 Extend the 'noalias' attribute to function return values. This is intended to 
indicate functions that allocate, such as operator new, or list::insert. The
actual definition is slightly less strict (for now).

No changes to the bitcode reader/writer, asm printer or verifier were needed.

llvm-svn: 59934
 2008-11-24 03:41:24 +00:00
Owen Anderson
42c1d6c7b9 Remove GCSE and LoadVN from the testsuite. 
llvm-svn: 54832
 2008-08-16 00:00:54 +00:00
Chris Lattner
e987a3bdd1 If we are checking to see if the result of a call aliases a 
pointer derived from a local allocation, if the local allocation
never escapes, the pointers can't alias.  This implements PR2436

llvm-svn: 52301
 2008-06-16 06:19:11 +00:00
Matthijs Kooijman
82d762a948 Suppress the (stderr) output of -aa-eval, this fixes 5 tests. 
llvm-svn: 52173
 2008-06-10 12:39:15 +00:00
Wojciech Matyjewicz
06e4c8a420 Fixes PR2395. Looking for a constant in a GEP tail (when the first GEP 
is longer than the second one) should stop after finding one. Added break 
instruction guarantees it. It also changes difference between offsets to 
absolute value of this difference in the condition.

llvm-svn: 51875
 2008-06-02 17:26:12 +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
3e607df2f8 Fix this test. It was testing broken behavior in that it required ADCE to eliminate 
a potentially infinite loop, which is undesirable.  Instead, test the LICM behavior
that we're really interested in.

llvm-svn: 51177
 2008-05-16 04:25:09 +00:00
Chris Lattner
a9d8d647ca rename *.llx -> *.ll, last batch. 
llvm-svn: 49971
 2008-04-19 22:32:52 +00:00
Owen Anderson
cd1b9c4b43 Make GVN able to remove unnecessary calls to read-only functions again. 
llvm-svn: 49842
 2008-04-17 05:36:50 +00:00
Dale Johannesen
45e14f7753 Don't assume a tail call can't reference a byval 
argument to the outer function, this isn't correct.

llvm-svn: 49731
 2008-04-15 17:41:34 +00:00
Owen Anderson
a6d1d8dec2 The functionality being tested was removed because it was horribly unsafe. 
llvm-svn: 49610
 2008-04-13 09:51:06 +00:00
Gabor Greif
fd0fb616f8 Fix http://llvm.org/bugs/show_bug.cgi?id=2104 by ordering lexicographically what gets printed. Be const-correct in PrintResults and uninline it too 
llvm-svn: 47712
 2008-02-28 08:38:45 +00:00
Tanya Lattner
f37f44f9ec Remove llvm-upgrade. 
llvm-svn: 47110
 2008-02-14 06:56:27 +00:00
Chris Lattner
cd5013eb2f Teach basicaa that 'byval' arguments define a new memory location that 
can't be aliased to other known objects.  This allows us to know that byval 
pointer args don't alias globals, etc.

llvm-svn: 46315
 2008-01-24 18:00:32 +00:00
Nick Lewycky
e05651c6d7 Accept both %y, %x and %x, %y as valid answers. 
llvm-svn: 45649
 2008-01-06 03:12:44 +00:00
Chris Lattner
95f9743c43 Fix PR1782, patch by Wojtek Matyjewicz! 
llvm-svn: 44733
 2007-12-09 07:35:13 +00:00
Tanya Lattner
c33660d278 Fix bug in regression tests that ignored stderr output in RUN lines. Updated tests and fixed broken run lines. 
XFAILed 3 arm regressions (will file bugs)

llvm-svn: 44389
 2007-11-28 04:57:00 +00:00
Owen Anderson
05275b7b14 Allow GVN to eliminate read-only function calls when it can detect that they are redundant. 
llvm-svn: 44323
 2007-11-26 02:26:36 +00:00
Duncan Sands
703986d327 Teach alias analysis about readnone/readonly functions. 
Based on a patch by Török Edwin.

llvm-svn: 44279
 2007-11-22 21:43:27 +00:00
Chris Lattner
02a91dce21 Fix PR1774 and BasicAA/2007-11-05-SizeCrash.ll 
llvm-svn: 43756
 2007-11-06 05:58:42 +00:00
Owen Anderson
6cc4e90741 Fix for PR1741. 
llvm-svn: 43326
 2007-10-25 02:36:18 +00:00
Chandler Carruth
67d3119773 This resolves a regression of BasicAA which failed to find any memory information for overloaded intrinsics (PR1600). This resolves that issue, and improves the matching scheme to use a BitVector rather than a binary search. 
llvm-svn: 40872
 2007-08-06 20:57:16 +00:00
Christopher Lamb
9a2a58c818 Teach BasicAA about noalias parameter attributes, but do it correctly this time. 
llvm-svn: 40711
 2007-08-02 01:18:14 +00:00
Christopher Lamb
5487dd14b4 Revert overly aggressive interpretation of noalias 
llvm-svn: 40635
 2007-07-31 16:18:07 +00:00
Christopher Lamb
907892e47a Teach BasicAA about noalias function parameters. Passes all of DejaGNU and test-suite. 
llvm-svn: 40624
 2007-07-31 07:04:51 +00:00
John Criswell
57e5ed4b5a Convert .cvsignore files 
llvm-svn: 37801
 2007-06-29 16:35:07 +00:00
Reid Spencer
df17fa8ef9 For PR1319: 
Remove && from the end of the lines to prevent tests from throwing run
lines into the background. Also, clean up places where the same command
is run multiple times by using a temporary file.

llvm-svn: 36142
 2007-04-16 17:36:08 +00:00
Reid Spencer
43899915e9 For PR1319: 
Fix syntax of tests to ensure grep pattern is properly quoted.

llvm-svn: 36134
 2007-04-16 15:31:49 +00:00
Reid Spencer
d93b834b52 For PR1319: 
Fix test syntax per new rules.

llvm-svn: 36133
 2007-04-16 15:15:52 +00:00
Reid Spencer
cfa86314dd Changes to fix problems with "make check". Apparently you can redefine 
functions and Tcl's just tickled with that. The fix is to give the "new"
test system a different interface function name.

llvm-svn: 36022
 2007-04-14 22:51:29 +00:00
Reid Spencer
6ac77d03a8 Convert test cases to new llvm.exp version of llvm_runtest and fix tests 
that it found to be broken.

llvm-svn: 36009
 2007-04-14 19:27:03 +00:00
Reid Spencer
56b310ae49 Make the llvm-runtest function much more amenable by eliminating all the 
global variables that needed to be passed in. This makes it possible to
add new global variables with only a couple changes (Makefile and llvm-dg.exp)
instead of touching every single dg.exp file.

llvm-svn: 35918
 2007-04-11 19:56:59 +00:00
Reid Spencer
50ee6b8557 Remove use of implementation keyword. 
llvm-svn: 35412
 2007-03-28 02:38:26 +00:00
Reid Spencer
6a31ec1259 For PR761: 
Remove "target endian/pointersize" or add "target datalayout" to make
the test parse properly or set the datalayout because defaults changes.

For PR645:
Make global names use the @ prefix.

For llvm-upgrade changes:
Fix test cases or completely remove use of llvm-upgrade for test cases
that cannot survive the new renaming or upgrade capabilities.

llvm-svn: 33533
 2007-01-26 08:25:06 +00:00
Reid Spencer
4572ce85b0 Regression is gone, don't try to find it on clean target. 
llvm-svn: 33296
 2007-01-17 07:59:14 +00:00