Commit Graph

101 Commits

Author SHA1 Message Date
Manman Ren
409558f81e Debug Info: update testing cases to specify the debug info version number.
We are going to drop debug info without a version number or with a different
version number, to make sure we don't crash when we see bitcode files with
different debug info metadata format.

llvm-svn: 195504
2013-11-22 21:49:45 +00:00
Yunzhong Gao
5cbcf56a7e Fixing a heisenbug where the memory dependence analysis behaves differently
with and without -g.

Adding a test case to make sure that the threshold used in the memory
dependence analysis is respected. The test case also checks that debug
intrinsics are not counted towards this threshold.

Differential Revision: http://llvm-reviews.chandlerc.com/D2141

llvm-svn: 194646
2013-11-14 01:10:52 +00:00
Daniel Dunbar
9efbedfd35 [tests] Cleanup initialization of test suffixes.
- Instead of setting the suffixes in a bunch of places, just set one master
   list in the top-level config. We now only modify the suffix list in a few
   suites that have one particular unique suffix (.ml, .mc, .yaml, .td, .py).

 - Aside from removing the need for a bunch of lit.local.cfg files, this enables
   4 tests that were inadvertently being skipped (one in
   Transforms/BranchFolding, a .s file each in DebugInfo/AArch64 and
   CodeGen/PowerPC, and one in CodeGen/SI which is now failing and has been
   XFAILED).

 - This commit also fixes a bunch of config files to use config.root instead of
   older copy-pasted code.

llvm-svn: 188513
2013-08-16 00:37:11 +00:00
Stephen Lin
a76289aa1b Catch more CHECK that can be converted to CHECK-LABEL in Transforms for easier debugging. No functionality change.
This conversion was done with the following bash script:

  find test/Transforms -name "*.ll" | \
  while read NAME; do
    echo "$NAME"
    if ! grep -q "^; *RUN: *llc" $NAME; then
      TEMP=`mktemp -t temp`
      cp $NAME $TEMP
      sed -n "s/^define [^@]*@\([A-Za-z0-9_]*\)(.*$/\1/p" < $NAME | \
      while read FUNC; do
        sed -i '' "s/;\(.*\)\([A-Za-z0-9_]*\):\( *\)define\([^@]*\)@$FUNC\([( ]*\)\$/;\1\2-LABEL:\3define\4@$FUNC(/g" $TEMP
      done
      mv $TEMP $NAME
    fi
  done

llvm-svn: 186269
2013-07-14 01:50:49 +00:00
Stephen Lin
c1c7a1309c Update Transforms tests to use CHECK-LABEL for easier debugging. No functionality change.
This update was done with the following bash script:

  find test/Transforms -name "*.ll" | \
  while read NAME; do
    echo "$NAME"
    if ! grep -q "^; *RUN: *llc" $NAME; then
      TEMP=`mktemp -t temp`
      cp $NAME $TEMP
      sed -n "s/^define [^@]*@\([A-Za-z0-9_]*\)(.*$/\1/p" < $NAME | \
      while read FUNC; do
        sed -i '' "s/;\(.*\)\([A-Za-z0-9_]*\):\( *\)@$FUNC\([( ]*\)\$/;\1\2-LABEL:\3@$FUNC(/g" $TEMP
      done
      mv $TEMP $NAME
    fi
  done

llvm-svn: 186268
2013-07-14 01:42:54 +00:00
Manman Ren
1a5ff287fd TBAA: remove !tbaa from testing cases if not used.
This will make it easier to turn on struct-path aware TBAA since the metadata
format will change.

llvm-svn: 180796
2013-04-30 17:52:57 +00:00
Dmitri Gribenko
d7beca87f5 Tests: rewrite 'opt ... %s' to 'opt ... < %s' so that opt does not emit a ModuleID
This is done to avoid odd test failures, like the one fixed in r171243.

My previous regex was not good enough to find these.

llvm-svn: 171343
2013-01-01 13:57:25 +00:00
Dmitri Gribenko
b137c9e551 Tests: rewrite 'opt ... %s' to 'opt ... < %s' so that opt does not emit a ModuleID
This is done to avoid odd test failures, like the one fixed in r171243.

llvm-svn: 171246
2012-12-30 01:28:40 +00:00
Nick Lewycky
65b1f5055d Make this test check the transforms it's actually doing. Also add a test that it
doesn't transform the trivially unsafe case.

llvm-svn: 164617
2012-09-25 18:17:38 +00:00
Nick Lewycky
42bca056e0 Don't forget that strcpy and friends return a pointer to the destination, so
it's not a dead store if that pointer is used. Whoops!

llvm-svn: 164583
2012-09-25 01:55:59 +00:00
Nick Lewycky
9f4729d331 Teach DSE that strcpy, strncpy, strcat and strncat are all stores which may be
dead.

llvm-svn: 164561
2012-09-24 22:09:10 +00:00
Bob Wilson
dcc54decd5 Fix more fallout from r158919, similar to PR13547.
This code used to only handle malloc-like calls, which do not read memory.
r158919 changed it to check isNoAliasFn(), which includes strdup-like and
realloc-like calls, but it was not checking for dependencies on the memory
read by those calls.

llvm-svn: 163106
2012-09-03 05:15:15 +00:00
Craig Topper
2a40418a99 Change greater than to greater than or equal so that an identical sized store to the same offset is treated as completing overwriting.
llvm-svn: 161857
2012-08-14 07:32:05 +00:00
Eli Friedman
08ec0a8122 isAllocLikeFn is allowed to return true for functions which read memory; make
sure we account for that correctly in DeadStoreElimination.  Fixes a regression
from r158919.  PR13547.

llvm-svn: 161468
2012-08-08 02:17:32 +00:00
Dan Gohman
ed7c24e2d9 Teach DeadStoreElimination to eliminate exit-block stores with phi addresses.
llvm-svn: 156558
2012-05-10 18:57:38 +00:00
Nuno Lopes
300d629924 teach DSE and isInstructionTriviallyDead() about calloc
llvm-svn: 156553
2012-05-10 17:14:00 +00:00
Pete Cooper
39b5255df4 Reverted r152620 - DSE: Shorten memset when a later store overwrites the start of it. There were all sorts of buildbot issues
llvm-svn: 151621
2012-02-28 05:06:24 +00:00
Pete Cooper
f3862f91de DSE: Shorten memset when a later store overwrites the start of it
llvm-svn: 151620
2012-02-28 04:27:10 +00:00
Rafael Espindola
a640db900a Add testcase for the previous commit.
llvm-svn: 151475
2012-02-26 05:49:57 +00:00
Eli Bendersky
924f9a671d Replace all instances of dg.exp file with lit.local.cfg, since all tests are run with LIT now and now Dejagnu. dg.exp is no longer needed.
Patch reviewed by Daniel Dunbar. It will be followed by additional cleanup patches.

llvm-svn: 150664
2012-02-16 06:28:33 +00:00
Nick Lewycky
fe970725cc Fix infinite loop in DSE when deleting a free in a reachable loop that's also
trivially infinite.

llvm-svn: 146197
2011-12-08 22:36:35 +00:00
Pete Cooper
e03fe83d98 Fixed deadstoreelimination bug where negative indices were incorrectly causing the optimisation to occur
Turns out long long + unsigned long long is unsigned.  Doh!

Fixes http://llvm.org/bugs/show_bug.cgi?id=11455

llvm-svn: 145731
2011-12-03 00:04:30 +00:00
Nick Lewycky
db408f1857 Fix typo in test.
llvm-svn: 144774
2011-11-16 03:56:38 +00:00
Nick Lewycky
c7f1e7993c Merge isObjectPointerWithTrustworthySize with getPointerSize. Use it when
looking at the size of the pointee. Fixes PR11390!

llvm-svn: 144773
2011-11-16 03:49:48 +00:00
Pete Cooper
856977cb15 DeadStoreElimination can now trim the size of a store if the end of the store is dead.
Currently checks alignment and killing stores on a power of 2 boundary as this is likely
to trim the size of the earlier store without breaking large vector stores into scalar ones.

Fixes <rdar://problem/10140300>

llvm-svn: 144239
2011-11-09 23:07:35 +00:00
Nick Lewycky
f2905afe62 Do simple cross-block DSE when we encounter a free statement. Fixes PR11240.
llvm-svn: 143808
2011-11-05 10:48:42 +00:00
Daniel Dunbar
e6d40de414 Speculatively revert "DeadStoreElimination can now trim the size of a store if
the end of it is dead.", which appears to break bootstrapping LLVM.

llvm-svn: 143668
2011-11-04 00:48:26 +00:00
Pete Cooper
8a95aedb5d DeadStoreElimination can now trim the size of a store if the end of it is dead.
Only currently done if the later store is writing to a power of 2 address or 
has the same alignment as the earlier store as then its likely to not break up
large stores into smaller ones

Fixes <rdar://problem/10140300>

llvm-svn: 143630
2011-11-03 18:01:56 +00:00
Nick Lewycky
dd1d3df524 A dead malloc, a free(NULL) and a free(undef) are all trivially dead
instructions.

This doesn't introduce any optimizations we weren't doing before (except
potentially due to pass ordering issues), now passes will eliminate them sooner
as part of their own cleanups.

llvm-svn: 142787
2011-10-24 04:35:36 +00:00
Nick Lewycky
32f8051d66 A non-escaping malloc in the entry block is not unlike an alloca. Do dead-store
elimination on them too.

llvm-svn: 142735
2011-10-22 21:59:35 +00:00
Owen Anderson
58704ee442 Try again at r138809 (make DSE more aggressive in removing dead stores at the end of a function), now with less deleting stores before memcpy's.
llvm-svn: 139150
2011-09-06 18:14:09 +00:00
Owen Anderson
b359367a3d Remove empty file.
llvm-svn: 138830
2011-08-30 21:17:20 +00:00
Owen Anderson
e316e5b2ad Speculatively revert r138809 in an attempt to fix DragonEgg.
llvm-svn: 138829
2011-08-30 21:11:06 +00:00
Owen Anderson
d708ec4c6a When walking backwards to eliminate final stores to allocas at the end of a function, encountering an unrelated store should not cause us to give up like encountering a load does.
llvm-svn: 138809
2011-08-30 18:51:55 +00:00
Eli Friedman
9a468153e1 Atomic load/store handling for the passes using memdep (GVN, DSE, memcpyopt).
llvm-svn: 137888
2011-08-17 22:22:24 +00:00
Eli Friedman
02e737b08e 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
Chris Lattner
80ed9dc9e5 rip out a ton of intrinsic modernization logic from AutoUpgrade.cpp, which is
for pre-2.9 bitcode files.  We keep x86 unaligned loads, movnt, crc32, and the
target indep prefetch change.

As usual, updating the testsuite is a PITA.

llvm-svn: 133337
2011-06-18 06:05:24 +00:00
Chris Lattner
b90ed2233c 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
Chris Lattner
026f5e61f0 fix a really nasty basicaa mod/ref calculation bug that was causing miscompilation of
UnitTests/ObjC/messages-2.m with the recent optimizer improvements.

llvm-svn: 131897
2011-05-23 05:15:43 +00:00
Bill Wendling
5034159c5f * The DSE code that tested for overlapping needed to take into account the fact
that one of the numbers is signed while the other is unsigned. This could lead
  to a wrong result when the signed was promoted to an unsigned int.

* Add the data layout line to the testcase so that it will test the appropriate
  thing.

Patch by David Terei!

llvm-svn: 128577
2011-03-30 21:37:19 +00:00
Bill Wendling
db40b5c899 PR9561: A store with a negative offset (via GEP) could erroniously say that it
completely overlaps a previous store, thus mistakenly deleting that store. Check
for this condition.

llvm-svn: 128319
2011-03-26 01:20:37 +00:00
Chris Lattner
94fbdf3814 Fix PR8728, a miscompilation I recently introduced. When optimizing
memcpy's like:
  memcpy(A, B)
  memcpy(A, C)

we cannot delete the first memcpy as dead if A and C might be aliases.
If so, we actually get:

  memcpy(A, B)
  memcpy(A, A)

which is not correct to transform into:

  memcpy(A, A)

This patch was heavily influenced by Jakub Staszak's patch in PR8728, thanks
Jakub!

llvm-svn: 120974
2010-12-06 01:48:06 +00:00
Chris Lattner
903add84d9 Enhance DSE to handle the variable index case in PR8657.
llvm-svn: 120498
2010-11-30 23:43:23 +00:00
Chris Lattner
c0f3379ae0 teach DSE to use GetPointerBaseWithConstantOffset to analyze
may-aliasing stores that partially overlap with different base
pointers.  This implements PR6043 and the non-variable part of
PR8657

llvm-svn: 120485
2010-11-30 23:05:20 +00:00
Chris Lattner
b63ba73b1b enhance isRemovable to refuse to delete volatile mem transfers
now that DSE hacks on them.  This fixes a regression I introduced,
by generalizing DSE to hack on transfers.

llvm-svn: 120445
2010-11-30 19:12:10 +00:00
Chris Lattner
58b779e9c2 Rewrite the main DSE loop to be written in terms of reasoning
about pairs of AA::Location's instead of looking for MemDep's
"Def" predicate.  This is more powerful and general, handling
memset/memcpy/store all uniformly, and implementing PR8701 and
probably obsoleting parts of memcpyoptimizer.

This also fixes an obscure bug with init.trampoline and i8
stores, but I'm not surprised it hasn't been hit yet.  Enhancing
init.trampoline to carry the size that it stores would allow
DSE to be much more aggressive about optimizing them.

llvm-svn: 120406
2010-11-30 07:23:21 +00:00
Chris Lattner
c2e3445273 merge one more away
llvm-svn: 120375
2010-11-30 01:06:43 +00:00
Chris Lattner
7578d0df51 I already merged partial-overwrite.ll -> PartialStore.ll
Merge context-sensitive.ll -> simple.ll and upgrade it.

llvm-svn: 120374
2010-11-30 01:05:07 +00:00
Chris Lattner
43e3a98675 clean up DSE tests, removing some poorly reduced and useless old test,
merging more into other larger .ll files, filecheckizing along the way.

llvm-svn: 120373
2010-11-30 01:00:34 +00:00
Chris Lattner
90c4947df7 enhance basicaa to return "Mod" for a memcpy call when the
queried location doesn't overlap the source, and add a testcase.

llvm-svn: 120370
2010-11-30 00:43:16 +00:00