Anna Thomas 9cd4907159 [AliasAnalysis] Treat invariant.start as read-memory ...

Summary:
We teach alias analysis that invariant.start is readonly.
This helps with GVN and memcopy optimizations that currently treat.
invariant.start as a clobber.
We need to treat this as readonly, so that DSE does not incorrectly
remove stores prior to the invariant.start

Reviewers: sanjoy, reames, majnemer, dberlin

Subscribers: llvm-commits

Differential Revision: https://reviews.llvm.org/D23214

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@278138 91177308-0d34-0410-b5e6-96231b3b80d8

2016-08-09 17:18:05 +00:00

..

2008-02-24-MultipleUseofSRet.ll

Revert "Change memcpy/memset/memmove to have dest and source alignments."

2015-11-19 05:56:52 +00:00

2008-03-13-ReturnSlotBitcast.ll

Revert "Change memcpy/memset/memmove to have dest and source alignments."

2015-11-19 05:56:52 +00:00

2011-06-02-CallSlotOverwritten.ll

[opaque pointer type] Add textual IR support for explicit type parameter to load instruction

2015-02-27 21:17:42 +00:00

align.ll

Revert "Change memcpy/memset/memmove to have dest and source alignments."

2015-11-19 05:56:52 +00:00

atomic.ll

Revert "Change memcpy/memset/memmove to have dest and source alignments."

2015-11-19 05:56:52 +00:00

callslot_aa.ll

Revert "Change memcpy/memset/memmove to have dest and source alignments."

2015-11-19 05:56:52 +00:00

callslot_deref.ll

Revert "Change memcpy/memset/memmove to have dest and source alignments."

2015-11-19 05:56:52 +00:00

callslot_throw.ll

[MemCpyOpt] Don't perform callslot optimization across may-throw calls

2016-05-26 19:24:24 +00:00

capturing-func.ll

Revert "Change memcpy/memset/memmove to have dest and source alignments."

2015-11-19 05:56:52 +00:00

crash.ll

[opaque pointer type] Add textual IR support for explicit type parameter to getelementptr instruction

2015-02-27 19:29:02 +00:00

fca2memcpy.ll

Imporove load to store => memcpy

2016-03-14 22:52:27 +00:00

form-memset.ll

Revert "Change memcpy/memset/memmove to have dest and source alignments."

2015-11-19 05:56:52 +00:00

invariant.start.ll

[AliasAnalysis] Treat invariant.start as read-memory

2016-08-09 17:18:05 +00:00

lifetime.ll

[MemCpyOpt] Do not exchange llvm.lifetime.start and llvm.memcpy

2016-06-08 19:42:32 +00:00

loadstore-sret.ll

[MemCpyOpt] Don't perform callslot optimization across may-throw calls

2016-05-26 19:24:24 +00:00

memcpy-to-memset-with-lifetimes.ll

Revert "Change memcpy/memset/memmove to have dest and source alignments."

2015-11-19 05:56:52 +00:00

memcpy-to-memset.ll

Revert "Change memcpy/memset/memmove to have dest and source alignments."

2015-11-19 05:56:52 +00:00

memcpy-undef.ll

Revert "Change memcpy/memset/memmove to have dest and source alignments."

2015-11-19 05:56:52 +00:00

memcpy.ll

Revert "Change memcpy/memset/memmove to have dest and source alignments."

2015-11-19 05:56:52 +00:00

memmove.ll

Revert "Change memcpy/memset/memmove to have dest and source alignments."

2015-11-19 05:56:52 +00:00

memset-memcpy-redundant-memset.ll

Revert "Change memcpy/memset/memmove to have dest and source alignments."

2015-11-19 05:56:52 +00:00

memset-memcpy-to-2x-memset.ll

Revert "Change memcpy/memset/memmove to have dest and source alignments."

2015-11-19 05:56:52 +00:00

nontemporal.ll

[MemCpyOpt] Fix wrong merging adjacent nontemporal stores into memset calls.

2015-10-09 10:53:41 +00:00

profitable-memset.ll

[MemCpyOpt] Use MaxIntSize in byte instead of bit

2016-05-13 16:52:24 +00:00

smaller.ll

[PM] Port MemCpyOpt to the new PM.

2016-06-14 02:44:55 +00:00

sret.ll

Revert "Change memcpy/memset/memmove to have dest and source alignments."

2015-11-19 05:56:52 +00:00