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Lang Hames 4e920e58e6 [JITLink] Switch from an atom-based model to a "blocks and symbols" model. 
In the Atom model the symbols, content and relocations of a relocatable object
file are represented as a graph of atoms, where each Atom represents a
contiguous block of content with a single name (or no name at all if the
content is anonymous), and where edges between Atoms represent relocations.
If more than one symbol is associated with a contiguous block of content then
the content is broken into multiple atoms and layout constraints (represented by
edges) are introduced to ensure that the content remains effectively contiguous.
These layout constraints must be kept in mind when examining the content
associated with a symbol (it may be spread over multiple atoms) or when applying
certain relocation types (e.g. MachO subtractors).

This patch replaces the Atom model in JITLink with a blocks-and-symbols model.
The blocks-and-symbols model represents relocatable object files as bipartite
graphs, with one set of nodes representing contiguous content (Blocks) and
another representing named or anonymous locations (Symbols) within a Block.
Relocations are represented as edges from Blocks to Symbols. This scheme
removes layout constraints (simplifying handling of MachO alt-entry symbols,
and hopefully ELF sections at some point in the future) and simplifies some
relocation logic.

llvm-svn: 373689
 		2019-10-04 03:55:26 +00:00
clang Properly handle instantiation-dependent array bounds. 2019-10-04 01:25:59 +00:00
clang-tools-extra Add the misc-init-local-variables check. 2019-10-02 17:18:57 +00:00
compiler-rt [compiler-rt] Fix signal_line.cpp test 2019-10-04 00:43:05 +00:00
debuginfo-tests Make nrvo-string test more robust. 2019-06-27 20:38:37 +00:00
libc Add a director, along with README.txt and LICENSE.txt, for libc. 2019-09-16 21:39:08 +00:00
libclc travis: Add LLVM 9 build 2019-09-27 05:58:15 +00:00
libcxx Attempt to remove linker workaround on the buildbots: Attempt 2 2019-10-03 19:38:44 +00:00
libcxxabi [libc++abi] Do not export some implementation-detail functions 2019-10-03 14:24:53 +00:00
libunwind [libunwind] Adjust libunwind_01.pass.cpp test for ARM EHABI 2019-10-03 17:01:04 +00:00
lld [llvm-objdump] Further rearrange llvm-objdump sections for compatability 2019-10-03 22:01:08 +00:00
lldb Revert "Explicitly set entry point arch when it's thumb" 2019-10-04 01:45:58 +00:00
llgo IR: Support parsing numeric block ids, and emit them in textual output. 2019-03-22 18:27:13 +00:00
llvm [JITLink] Switch from an atom-based model to a "blocks and symbols" model. 2019-10-04 03:55:26 +00:00
openmp [OpenMP] FreeBSD address check if mapped more native 2019-09-28 19:01:59 +00:00
parallel-libs Fix typos throughout the license files that somehow I and my reviewers 2019-01-21 09:52:34 +00:00
polly [Alignment][NFC] Remove StoreInst::setAlignment(unsigned) 2019-10-03 13:17:21 +00:00
pstl [pstl] Allow customizing whether per-TU insulation is provided 2019-08-13 12:49:00 +00:00
.arcconfig Update monorepo .arcconfig with new project callsign. 2019-01-31 14:34:59 +00:00
.clang-format Add .clang-tidy and .clang-format files to the toplevel of the 2019-01-29 16:43:16 +00:00
.clang-tidy Disable tidy checks with too many hits 2019-02-01 11:20:13 +00:00
.git-blame-ignore-revs Add LLDB reformatting to .git-blame-ignore-revs 2019-09-04 09:31:55 +00:00
.gitignore Add a newline at the end of the file 2019-09-04 06:33:46 +00:00
README.md
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README.md

The LLVM Compiler Infrastructure

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