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41 Commits

Author SHA1 Message Date
Chris Lattner c053cbbc4d 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

llvm-svn: 95852
 2010-02-11 05:11:54 +00:00
Dan Gohman fb4193625a Delete useless trailing semicolons. 
llvm-svn: 92740
 2010-01-05 17:55:26 +00:00
Benjamin Kramer 401e6093c9 Fix some CHECK lines which were ignored by accident. 
llvm-svn: 91214
 2009-12-12 09:25:50 +00:00
Owen Anderson b9878ee6b6 Cleanup/remove some parts of the lifetime region handling code in memdep and GVN, 
per Chris' comments.  Adjust testcases to match.

llvm-svn: 90304
 2009-12-02 07:35:19 +00:00
Nick Lewycky 218a3393f4 Teach memdep to look for memory use intrinsics during dependency queries. Fixes 
PR5574.

llvm-svn: 90045
 2009-11-28 21:27:49 +00:00
Chris Lattner c7bc66dfc6 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.

llvm-svn: 90038
 2009-11-28 15:12:41 +00:00
Nick Lewycky c53e2ecf02 Teach BasicAA that a constant expression can't alias memory provably not 
allocated until runtime (such as an alloca). Patch by Hans Wennborg!

llvm-svn: 88760
 2009-11-14 06:15:14 +00:00
Duncan Sands 1925d3a1d1 Teach DSE to eliminate useless trampolines. 
llvm-svn: 86683
 2009-11-10 13:49:50 +00:00
Nick Lewycky 9027147fb1 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).

llvm-svn: 86667
 2009-11-10 06:46:40 +00:00
Chris Lattner acc83d10bd remove empty files. 
llvm-svn: 86392
 2009-11-07 18:03:32 +00:00
Chris Lattner 431000da21 Revert r86359, it is breaking the self host on the 
llvm-gcc-i386-darwin9 build bot.

llvm-svn: 86391
 2009-11-07 17:59:32 +00:00
Nick Lewycky b6a3dd48f4 Teach dead store elimination that certain intrinsics write to memory just like 
a store.

llvm-svn: 86359
 2009-11-07 08:34:40 +00:00
Chris Lattner a09062758b improve DSE when TargetData is not around, based on work by 
Hans Wennborg!

llvm-svn: 86067
 2009-11-04 23:20:12 +00:00
Kenneth Uildriks 90fedc6ef9 Make opt default to not adding a target data string and update tests that depend on target data to supply it within the test 
llvm-svn: 85900
 2009-11-03 15:29:06 +00:00
Owen Anderson 2b2bd28973 Treat lifetime begin/end markers as allocations/frees respectively for the 
purposes for GVN/DSE.

llvm-svn: 85383
 2009-10-28 07:05:35 +00:00
Dan Gohman 1880092722 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 72a13d2476 Use opt -S instead of piping bitcode output through llvm-dis. 
llvm-svn: 81257
 2009-09-08 22:34:10 +00:00
Dan Gohman 9737a63ed8 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 4916267c97 fix PR4815: some cases where DeleteDeadInstruction can delete 
the instruction BBI points to.

llvm-svn: 80768
 2009-09-02 06:31:02 +00:00
Dan Gohman a5b9645c4b 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

llvm-svn: 72897
 2009-06-04 22:49:04 +00:00
Chris Lattner 57e91eaf61 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().

llvm-svn: 60619
 2008-12-06 00:53:22 +00:00
Chris Lattner 8c5ff516c6 Fix a thinko that manifested as a crash on clamav last night. 
llvm-svn: 60251
 2008-11-29 20:29:04 +00:00
Chris Lattner d3d9111ede 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.

llvm-svn: 60222
 2008-11-28 22:51:08 +00:00
Owen Anderson 3f3389745d Add support for eliminating stores that store the same value that was just loaded. 
This fixes PR2599.

llvm-svn: 54133
 2008-07-28 16:14:26 +00:00
Gabor Greif 1e427c3264 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 f45ff35bfe 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
Dan Gohman 2cdcf2bd5f Update old-style syntax in some "not grep" tests. 
llvm-svn: 50560
 2008-05-01 23:50:07 +00:00
Dan Gohman 8cb19d967f Fix DSE to not eliminate volatile loads with no uses. 
llvm-svn: 50370
 2008-04-28 19:51:27 +00:00
Chris Lattner b839c05a05 rename *.llx -> *.ll, last batch. 
llvm-svn: 49971
 2008-04-19 22:32:52 +00:00
Tanya Lattner 5640bd186a Remove llvm-upgrade and update test cases. 
llvm-svn: 47793
 2008-03-01 09:15:35 +00:00
Owen Anderson 4e4b116750 Make DSE much more aggressive by performing DCE earlier. Update a testcase to reflect this increased aggressiveness. 
llvm-svn: 46542
 2008-01-30 01:24:47 +00:00
Owen Anderson 95bf1d4d7b Add a testcase for eliminating memcpy's at the end of functions. Forgot to commit this with my last commit. 
llvm-svn: 46497
 2008-01-29 06:40:32 +00:00
Owen Anderson 6af19fd1e2 DeadStoreElimination can treat byval parameters as if there were alloca's for the purpose of removing end-of-function stores. 
llvm-svn: 46351
 2008-01-25 10:10:33 +00:00
Owen Anderson 2ed651ace7 Fix test/Transforms/DeadStoreElimination/PartialStore.ll, which had been 
silently failing because of an incorrect run line for some time.

llvm-svn: 43605
 2007-11-01 05:29:16 +00:00
Owen Anderson 4d34e40c6d Forgot to update these files for the FastDSE changes. 
llvm-svn: 40674
 2007-08-01 16:53:51 +00:00
Owen Anderson 10e52eddb3 Rename FastDSE to just DSE. 
llvm-svn: 40668
 2007-08-01 06:36:51 +00:00
Owen Anderson 59a6840d47 Move these tests to use FastDSE instead of old DSE. 
llvm-svn: 40444
 2007-07-23 20:49:13 +00:00
John Criswell 2660cef6d7 Convert .cvsignore files 
llvm-svn: 37801
 2007-06-29 16:35:07 +00:00
Reid Spencer 951d8dc29f For PR1319: 
Upgrade to use new Tcl exec based test harness.

llvm-svn: 36062
 2007-04-15 08:30:33 +00:00
Reid Spencer d029c7e666 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 83b3d82672 Regression is gone, don't try to find it on clean target. 
llvm-svn: 33296
 2007-01-17 07:59:14 +00:00