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llvm-project/llvm/test/Transforms/DeadStoreElimination
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Sanjoy Das 737fa40ffa [DSE] Don't DSE stores that subsequent memmove calls read from 
Summary:
We used to remove the first memmove in cases like this:

  memmove(p, p+2, 8);
  memmove(p, p+2, 8);

which is incorrect.  Fix this by changing isPossibleSelfRead to what was most
likely the intended behavior.

Historical note: the buggy code was added in https://reviews.llvm.org/rL120974
to address PR8728.

Reviewers: rsmith

Subscribers: mcrosier, llvm-commits, jlebar

Differential Revision: https://reviews.llvm.org/D43425

llvm-svn: 325641
 		2018-02-20 23:19:34 +00:00
..
2011-03-25-DSEMiscompile.ll
…
2011-09-06-EndOfFunction.ll
…
2011-09-06-MemCpy.ll Remove alignment argument from memcpy/memmove/memset in favour of alignment attributes (Step 1) 2018-01-19 17:13:12 +00:00
2016-07-17-UseAfterFree.ll Remove alignment argument from memcpy/memmove/memset in favour of alignment attributes (Step 1) 2018-01-19 17:13:12 +00:00
OverwriteStoreBegin.ll Remove alignment argument from memcpy/memmove/memset in favour of alignment attributes (Step 1) 2018-01-19 17:13:12 +00:00
OverwriteStoreEnd.ll Remove alignment argument from memcpy/memmove/memset in favour of alignment attributes (Step 1) 2018-01-19 17:13:12 +00:00
PartialStore.ll [DSE] Merge stores when the later store only writes to memory locations the early store also wrote to (2nd try) 2017-09-26 13:54:28 +00:00
atomic.ll
…
calloc-store.ll
…
combined-partial-overwrites.ll Remove alignment argument from memcpy/memmove/memset in favour of alignment attributes (Step 1) 2018-01-19 17:13:12 +00:00
const-pointers.ll
…
crash.ll Remove alignment argument from memcpy/memmove/memset in favour of alignment attributes (Step 1) 2018-01-19 17:13:12 +00:00
cs-cs-aliasing.ll Remove alignment argument from memcpy/memmove/memset in favour of alignment attributes (Step 1) 2018-01-19 17:13:12 +00:00
debuginfo.ll [DeadStoreElimination] Salvage debug info from dead insts 2018-02-13 18:15:26 +00:00
dominate.ll
…
fence.ll
…
free.ll
…
inst-limits.ll Remove the obsolete offset parameter from @llvm.dbg.value 2017-07-28 20:21:02 +00:00
int_sideeffect.ll Add an @llvm.sideeffect intrinsic 2017-11-08 21:59:51 +00:00
invariant.start.ll
…
libcalls.ll
…
lifetime.ll Remove alignment argument from memcpy/memmove/memset in favour of alignment attributes (Step 1) 2018-01-19 17:13:12 +00:00
mda-with-dbg-values.ll Remove alignment argument from memcpy/memmove/memset in favour of alignment attributes (Step 1) 2018-01-19 17:13:12 +00:00
memintrinsics.ll Remove alignment argument from memcpy/memmove/memset in favour of alignment attributes (Step 1) 2018-01-19 17:13:12 +00:00
merge-stores-big-endian.ll [DSE] Merge stores when the later store only writes to memory locations the early store also wrote to (2nd try) 2017-09-26 13:54:28 +00:00
merge-stores.ll [DSE] make sure memory is not modified before partial store merging (PR36129) 2018-01-30 13:53:59 +00:00
no-targetdata.ll Remove alignment argument from memcpy/memmove/memset in favour of alignment attributes (Step 1) 2018-01-19 17:13:12 +00:00
operand-bundles.ll
…
pr11390.ll Remove alignment argument from memcpy/memmove/memset in favour of alignment attributes (Step 1) 2018-01-19 17:13:12 +00:00
simple.ll [DSE] Don't DSE stores that subsequent memmove calls read from 2018-02-20 23:19:34 +00:00