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56 Commits

Author SHA1 Message Date
Chris Lattner
98df4f9cf2 Make DSE only scan blocks that are reachable from the entry 
block.  Other blocks may have pointer cycles that will crash
basicaa and other alias analyses.  In any case, there is no
point wasting cycles optimizing dead blocks.  This fixes 
rdar://7635088


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@95852 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-02-11 05:11:54 +00:00
Dan Gohman
aceba31b7a Delete useless trailing semicolons. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@92740 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-01-05 17:55:26 +00:00
Benjamin Kramer
7b3f1a21ea Fix some CHECK lines which were ignored by accident. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@91214 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-12-12 09:25:50 +00:00
Owen Anderson
9ff5a23186 Cleanup/remove some parts of the lifetime region handling code in memdep and GVN, 
per Chris' comments.  Adjust testcases to match.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@90304 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-12-02 07:35:19 +00:00
Nick Lewycky
d801c10de6 Teach memdep to look for memory use intrinsics during dependency queries. Fixes 
PR5574.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@90045 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-28 21:27:49 +00:00
Chris Lattner
ab9530ee5d implement a FIXME: limit the depth that DecomposeGEPExpression goes the same 
way that getUnderlyingObject does it. 

This fixes the 'DecomposeGEPExpression and getUnderlyingObject disagree!' 
assertion on sqlite3.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@90038 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-28 15:12:41 +00:00
Nick Lewycky
20162ac566 Teach BasicAA that a constant expression can't alias memory provably not 
allocated until runtime (such as an alloca). Patch by Hans Wennborg!


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@88760 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-14 06:15:14 +00:00
Duncan Sands
710c37c494 Teach DSE to eliminate useless trampolines. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@86683 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-10 13:49:50 +00:00
Nick Lewycky
58571d663c Reapply r86359, "Teach dead store elimination that certain intrinsics write to 
memory just like a store" with bug fixed (partial-overwrite.ll is the
regression test).


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@86667 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-10 06:46:40 +00:00
Chris Lattner
b8391aa969 remove empty files. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@86392 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-07 18:03:32 +00:00
Chris Lattner
1d95725d60 Revert r86359, it is breaking the self host on the 
llvm-gcc-i386-darwin9 build bot.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@86391 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-07 17:59:32 +00:00
Nick Lewycky
4de9b7f51f Teach dead store elimination that certain intrinsics write to memory just like 
a store.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@86359 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-07 08:34:40 +00:00
Chris Lattner
40dd12e708 improve DSE when TargetData is not around, based on work by 
Hans Wennborg!


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@86067 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-04 23:20:12 +00:00
Kenneth Uildriks
b908f8ad6a Make opt default to not adding a target data string and update tests that depend on target data to supply it within the test 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@85900 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-03 15:29:06 +00:00
Owen Anderson
b62f792e78 Treat lifetime begin/end markers as allocations/frees respectively for the 
purposes for GVN/DSE.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@85383 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-10-28 07:05:35 +00:00
Dan Gohman
f2f6ce65b7 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.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@81537 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-09-11 18:01:28 +00:00
Dan Gohman
3e054fe9ef Use opt -S instead of piping bitcode output through llvm-dis. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@81257 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-09-08 22:34:10 +00:00
Dan Gohman
b1e1e82c54 Change these tests to feed the assembly files to opt directly, instead 
of using llvm-as, now that opt supports this.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@81226 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-09-08 16:50:01 +00:00
Chris Lattner
40ef630a46 fix PR4815: some cases where DeleteDeadInstruction can delete 
the instruction BBI points to.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@80768 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-09-02 06:31:02 +00:00
Dan Gohman
ae3a0be92e Split the Add, Sub, and Mul instruction opcodes into separate 
integer and floating-point opcodes, introducing
FAdd, FSub, and FMul.

For now, the AsmParser, BitcodeReader, and IRBuilder all preserve
backwards compatability, and the Core LLVM APIs preserve backwards
compatibility for IR producers. Most front-ends won't need to change
immediately.

This implements the first step of the plan outlined here:
http://nondot.org/sabre/LLVMNotes/IntegerOverflow.txt


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@72897 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-06-04 22:49:04 +00:00
Chris Lattner
5e600e67b1 Reimplement the inner loop of DSE. It now uniformly uses getDependence(), 
doesn't do its own local caching, and is slightly more aggressive about
free/store dse (see testcase).  This eliminates the last external client 
of MemDep::getDependenceFrom().


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60619 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-12-06 00:53:22 +00:00
Chris Lattner
3a76be584b Fix a thinko that manifested as a crash on clamav last night. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60251 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-11-29 20:29:04 +00:00
Chris Lattner
d3d12ecadd Fix PR3141 by ensuring that MemoryDependenceAnalysis::removeInstruction 
properly updates the reverse dependency map when it installs updated 
dependencies for instructions that depend on the removed instruction.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60222 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-11-28 22:51:08 +00:00
Owen Anderson
8aa895b19a Add support for eliminating stores that store the same value that was just loaded. 
This fixes PR2599.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@54133 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-07-28 16:14:26 +00:00
Gabor Greif
f6cadc440c sabre brings to my attention that the 'tr' suffix is also obsolete 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@51349 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-05-20 21:00:03 +00:00
Gabor Greif
722243bd40 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. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@51328 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-05-20 19:52:04 +00:00
Dan Gohman
fddaa3193c Update old-style syntax in some "not grep" tests. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@50560 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-05-01 23:50:07 +00:00
Dan Gohman
00acf97feb Fix DSE to not eliminate volatile loads with no uses. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@50370 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-28 19:51:27 +00:00
Chris Lattner
5ae21fb23a rename *.llx -> *.ll, last batch. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49971 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-19 22:32:52 +00:00
Tanya Lattner
ec9a35a6f9 Remove llvm-upgrade and update test cases. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@47793 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-03-01 09:15:35 +00:00
Owen Anderson
772601a885 Make DSE much more aggressive by performing DCE earlier. Update a testcase to reflect this increased aggressiveness. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@46542 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-01-30 01:24:47 +00:00
Owen Anderson
cca1867ab7 Add a testcase for eliminating memcpy's at the end of functions. Forgot to commit this with my last commit. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@46497 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-01-29 06:40:32 +00:00
Owen Anderson
e3c36f6758 DeadStoreElimination can treat byval parameters as if there were alloca's for the purpose of removing end-of-function stores. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@46351 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-01-25 10:10:33 +00:00
Owen Anderson
7ebba512c3 Fix test/Transforms/DeadStoreElimination/PartialStore.ll, which had been 
silently failing because of an incorrect run line for some time.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@43605 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-11-01 05:29:16 +00:00
Owen Anderson
268479f454 Forgot to update these files for the FastDSE changes. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@40674 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-08-01 16:53:51 +00:00
Owen Anderson
f6a05f949f Rename FastDSE to just DSE. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@40668 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-08-01 06:36:51 +00:00
Owen Anderson
33d137f90a Move these tests to use FastDSE instead of old DSE. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@40444 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-07-23 20:49:13 +00:00
John Criswell
e644ef7b09 Convert .cvsignore files 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37801 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-06-29 16:35:07 +00:00
Reid Spencer
2aabd0722d For PR1319: 
Upgrade to use new Tcl exec based test harness.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@36062 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-04-15 08:30:33 +00:00
Reid Spencer
0f5aed5648 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.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35918 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-04-11 19:56:59 +00:00
Reid Spencer
f1d2f96675 llvm.isunordered.* are gone. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@33002 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-01-07 23:30:23 +00:00
Reid Spencer
eacb7020ec For PR950: 
Update the test suite to accommodate the change from signed integer types
to signless integer types. The changes were of only a few kinds:

1. Make sure llvm-upgrade is run on the source which does the bulk of the
   changes automatically.

2. Change things like "grep 'int'" to "grep 'i32'"

3. In several tests bitcasting caused the same name to be reused in the
   same type plane. These had to be manually fixed. The fix was (generally)
   to leave the bitcast and provide the instruction with a new name. This
   should not affect the semantics of the test. In a few cases, the
   bitcasts were known to be superfluous and irrelevant to the test case
   so they were removed.

4. One test case uses a bytecode file which needed to be updated to the
   latest bytecode format.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@32789 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-12-31 06:02:00 +00:00
Reid Spencer
69ccadd753 Use the llvm-upgrade program to upgrade llvm assembly. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@32115 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-12-02 04:23:10 +00:00
Chris Lattner
4ba6bf7458 New testcase, reduced by nate, which crashes DSE 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28949 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-06-27 23:47:39 +00:00
Tanya Lattner
9727555859 Added the ability to xfail based on llvmgcc version 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@27635 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-04-12 21:57:40 +00:00
Reid Spencer
2676f83776 Tired of wading through cvs's list ? files that are generated when building 
with srcdir = objdir to see what's okay and what's cruft. So, in goes a
bunch of .cvsignore files to shut cvs up about known output from running
"make check".


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@27009 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-03-23 23:41:57 +00:00
Chris Lattner
c2c2009e2c new testcase dse is miscompiling 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@24544 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-11-30 19:37:08 +00:00
Chris Lattner
d0137cd0f4 Add a comment, add a new testcase 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19179 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-12-29 04:35:30 +00:00
Chris Lattner
1d078167a9 New testcase for PR491 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19178 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-12-29 04:27:26 +00:00
Chris Lattner
f4a0e5093c New testcase. The store is not dead here. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@18307 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-11-28 19:54:02 +00:00