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Teresa Johnson f368101567 [ThinLTO] Serialize WithGlobalValueDeadStripping index flag for distributed backends 
Summary:
A recent fix to drop dead symbols (r323633) did not work for ThinLTO
distributed backends because we lose the WithGlobalValueDeadStripping
set on the index during the thin link. This patch adds a new flags
record to the bitcode format for the index, and serializes this flag
for the combined index (it would always be 0 for the per-module index
generated by the compile step, so no need to serialize the new flags
record there until/unless we add another flag that applies to the
per-module indexes).

Generally this flag should always be set for the distributed backends,
which are necessarily performed after the thin link. However, if we were
to simply set this flag on the index applied to the distributed backends
(invoked via clang), we would lose the ability to disable dead stripping
via -compute-dead=false for debugging purposes.

Reviewers: grimar, pcc

Subscribers: mehdi_amini, inglorion, eraman, llvm-commits

Differential Revision: https://reviews.llvm.org/D42799

llvm-svn: 324444
 		2018-02-07 04:05:59 +00:00
clang AST: support SwiftCC on MS ABI 2018-02-07 01:55:08 +00:00
clang-tools-extra test: use target triple for the test 2018-02-07 02:27:34 +00:00
compiler-rt [Sanitizers, Darwin] Disable SANITIZER_SUPPORTS_WEAK_HOOKS before Mac OS X 10.9 2018-02-05 23:02:09 +00:00
debuginfo-tests [debuginfo-tests] Support moving debuginfo-tests to llvm/projects 2017-12-12 16:54:20 +00:00
libclc Add vstore_half_rte implementation 2018-02-06 18:44:50 +00:00
libcxx Remove more of the std::experimental bits that are now in std::. All the _v type aliases, conjunction/disjunction, apply, etc. See https://libcxx.llvm.org/TS_deprecation.html 2018-02-06 23:13:48 +00:00
libcxxabi [demangler] Refactor the type parser 2018-02-05 22:41:20 +00:00
libunwind [cmake] [libunwind] LLVM_FOUND isn't always set, so just test if 2018-01-27 19:31:44 +00:00
lld [WebAssembly] Add __data_end link-sythentic symbol. 2018-02-07 03:04:53 +00:00
lldb lldb running on an ios device is using the _dyld_get_all_image_infos() 2018-02-07 01:28:29 +00:00
llgo irgen: Create functions instead of global variables for builtin hash and equal algorithms. 2017-06-04 22:11:28 +00:00
llvm [ThinLTO] Serialize WithGlobalValueDeadStripping index flag for distributed backends 2018-02-07 04:05:59 +00:00
openmp [OMPT] Fix tool initialization returning 0 2018-02-06 08:41:27 +00:00
parallel-libs [Axccel] Remove -Wno-missing-braces in build 2016-12-19 21:34:07 +00:00
polly [ScopBuilder] Make -polly-stmt-granularity=scalar-indep the default. 2018-02-03 06:59:47 +00:00
README.md Add an svn project to contain the files that appear at the root of the 2017-10-19 21:09:49 +00:00

README.md

Low Level Virtual Machine (LLVM)

This directory and its subdirectories contain source code for LLVM, a toolkit for the construction of highly optimized compilers, optimizers, and runtime environments.