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Florian Hahn 402961396d [PassManager] Move load/store motion pass after DSE in LTO pipeline. 
As far as I am aware, the placement of MergedLoadStoreMotion in the
pipeline is not heavily tuned currently. It seems to not matter much if
we do it after DSE in the LTO pipeline (no binary changes for -O3 -flto
on MultiSource/SPEC2000/SPEC2006). Moving it after DSE however has a
major benefit: MemorySSA is constructed by LICM and is consumed by DSE,
so if MergedLoadStoreMotion happens after DSE, we do not need to
preserve MemorySSA in it.

If there are any concerns with this move, I can also update
MergedLoadStoreMotion to preserve MemorySSA.

This patch together with D86651 (preserve MemSSA in MemCpyOpt) and
D86534 (preserve MemSSA in GVN) are the remaining patches to bring down
compile-time for DSE + MemorySSA to the levels outlined in
http://lists.llvm.org/pipermail/llvm-dev/2020-August/144417.html

Once they land, we should be able to start with flipping the switch on
enabling DSE + MmeorySSA.

Reviewed By: asbirlea

Differential Revision: https://reviews.llvm.org/D86967
2020-09-03 13:47:50 +01:00
benchmarks
bindings [OCaml] Remove add_constant_propagation 2020-08-27 09:30:21 -07:00
cmake [CMake] Use find_library for ncurses 2020-08-31 20:06:21 -07:00
docs [LangRef] Fix condition for when a loop is considered parallel. 2020-09-01 15:41:59 -05:00
examples [examples] Fix dependencies for OrcV2Examples/LLJITWithThinLTOSummaries. 2020-08-25 11:51:20 -07:00
include [GVN] Preserve MemorySSA if it is available. 2020-09-03 12:28:13 +01:00
lib [PassManager] Move load/store motion pass after DSE in LTO pipeline. 2020-09-03 13:47:50 +01:00
projects
resources
runtimes [runtimes] Remove TOOLCHAIN_TOOLS specialization 2020-08-24 13:48:29 -07:00
test [X86][SSE] Fold select(X > -1, A, B) -> select(0 > X, B, A) (PR47404) 2020-09-03 13:02:08 +01:00
tools [llvm-readelf] - Move a bit of common code to printDynamicRelocHeader(). NFC. 2020-09-03 13:25:11 +03:00
unittests [RFC][Target] Add a new triple called Triple::csky 2020-09-02 12:46:09 +08:00
utils Revert "[NewPM][Lint] Port -lint to NewPM" 2020-09-02 21:34:29 -07:00
.clang-format
.clang-tidy
.gitattributes
.gitignore [clangd] Store index in '.cache/clangd/index' instead of '.clangd/index' 2020-07-07 14:53:45 +02:00
CMakeLists.txt [CMake] Remove -Wl,-allow-shlib-undefined which was added in rL221530 2020-09-01 21:13:45 -07:00
CODE_OWNERS.TXT Update my email address. 2020-08-21 10:15:26 -07:00
configure
CREDITS.TXT Update my email address. 2020-08-21 10:15:26 -07:00
LICENSE.TXT
llvm.spec.in
LLVMBuild.txt
README.txt Test commit. 2020-03-14 18:08:26 -07:00
RELEASE_TESTERS.TXT

README.txt 

The LLVM Compiler Infrastructure
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