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Hiroshi Yamauchi 9745453d49 Unmerge GEPs to reduce register pressure on IndirectBr edges. 
Summary:
GEP merging can sometimes increase the number of live values and register
pressure across control edges and cause performance problems particularly if the
increased register pressure results in spills.

This change implements GEP unmerging around an IndirectBr in certain cases to
mitigate the issue. This is in the CodeGenPrepare pass (after all the GEP
merging has happened.)

With this patch, the Python interpreter loop runs faster by ~5%.

Reviewers: sanjoy, hfinkel

Reviewed By: hfinkel

Subscribers: eastig, junbuml, llvm-commits

Differential Revision: https://reviews.llvm.org/D36772

llvm-svn: 312930
2017-09-11 17:52:08 +00:00
bindings Update the Go bindings for r309426 (remove offset from llvm.dbg.value) 2017-07-28 22:44:44 +00:00
cmake [CMake] Update GetSVN.cmake to handle repo 2017-09-09 14:17:52 +00:00
docs [docs] Add a note on iteration of unordered containers to coding standards 2017-09-06 20:19:10 +00:00
examples [ORC] Refactor OrcRemoteTarget code to expose its RPC API, reduce 2017-09-04 20:54:46 +00:00
include [ORC] Kill off a dead typedef. 2017-09-11 01:09:46 +00:00
lib Unmerge GEPs to reduce register pressure on IndirectBr edges. 2017-09-11 17:52:08 +00:00
projects
resources
runtimes [CMake][runtimes] Use the same configuration for non-target and "default" target 2017-09-08 22:26:50 +00:00
test Unmerge GEPs to reduce register pressure on IndirectBr edges. 2017-09-11 17:52:08 +00:00
tools [llvm-cov] Fix a lifetime issue 2017-09-08 18:44:49 +00:00
unittests CoverageMappingTest.cpp: Suppress warnings. [-Wdocumentation] 2017-09-09 06:19:53 +00:00
utils [TableGen] Ensure that __lsan_is_turned_off isn't removed by DCE in llvm-tblgen 2017-09-11 13:50:39 +00:00
.arcconfig
.clang-format
.clang-tidy
.gitignore
CMakeLists.txt [cmake] Stop putting the revision info in LLVM_VERSION_STRING 2017-08-29 21:44:21 +00:00
CODE_OWNERS.TXT [ARC] Add ARC backend. 2017-08-24 15:40:33 +00:00
configure
CREDITS.TXT Another test commit 2017-07-01 03:24:06 +00:00
LICENSE.TXT
llvm.spec.in
LLVMBuild.txt
README.txt Test commit access 2017-08-18 02:39:28 +00:00
RELEASE_TESTERS.TXT [RelTest] Diana is doing both releases now 2017-07-14 08:33:52 +00:00

README.txt 

Low Level Virtual Machine (LLVM)
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