[llvm] Cleanup header dependencies in ADT and Support

The cleanup was manual, but assisted by "include-what-you-use". It consists in

1. Removing unused forward declaration. No impact expected.
2. R

[llvm] Cleanup header dependencies in ADT and Support

The cleanup was manual, but assisted by "include-what-you-use". It consists in

1. Removing unused forward declaration. No impact expected.
2. Removing unused headers in .cpp files. No impact expected.
3. Removing unused headers in .h files. This removes implicit dependencies and
is generally considered a good thing, but this may break downstream builds.
I've updated llvm, clang, lld, lldb and mlir deps, and included a list of the
modification in the second part of the commit.
4. Replacing header inclusion by forward declaration. This has the same impact
as 3.

Notable changes:

- llvm/Support/TargetParser.h no longer includes llvm/Support/AArch64TargetParser.h nor llvm/Support/ARMTargetParser.h
- llvm/Support/TypeSize.h no longer includes llvm/Support/WithColor.h
- llvm/Support/YAMLTraits.h no longer includes llvm/Support/Regex.h
- llvm/ADT/SmallVector.h no longer includes llvm/Support/MemAlloc.h nor llvm/Support/ErrorHandling.h

You may need to add some of these headers in your compilation units, if needs be.

As an hint to the impact of the cleanup, running

clang++ -E -Iinclude -I../llvm/include ../llvm/lib/Support/*.cpp -std=c++14 -fno-rtti -fno-exceptions | wc -l

before: 8000919 lines
after: 7917500 lines

Reduced dependencies also helps incremental rebuilds and is more ccache
friendly, something not shown by the above metric :-)

Discourse thread on the topic: https://llvm.discourse.group/t/include-what-you-use-include-cleanup/5831

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Update the file headers across all of the LLVM projects in the monorepo
to reflect the new license.

We understand that people may be surprised that we're moving the header
entirely to discuss the ne

Update the file headers across all of the LLVM projects in the monorepo
to reflect the new license.

We understand that people may be surprised that we're moving the header
entirely to discuss the new license. We checked this carefully with the
Foundation's lawyer and we believe this is the correct approach.

Essentially, all code in the project is now made available by the LLVM
project under our new license, so you will see that the license headers
include that license only. Some of our contributors have contributed
code under our old license, and accordingly, we have retained a copy of
our old license notice in the top-level files in each project and
repository.

llvm-svn: 351636

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Lift VFS from clang to llvm (NFC)

This patch moves the virtual file system form clang to llvm so it can be
used by more projects.

Concretely the patch:
- Moves VirtualFileSystem.{h|cpp} from clang

Lift VFS from clang to llvm (NFC)

This patch moves the virtual file system form clang to llvm so it can be
used by more projects.

Concretely the patch:
- Moves VirtualFileSystem.{h|cpp} from clang/Basic to llvm/Support.
- Moves the corresponding unit test from clang to llvm.
- Moves the vfs namespace from clang::vfs to llvm::vfs.
- Formats the lines affected by this change, mostly this is the result of
the added llvm namespace.

RFC on the mailing list:
http://lists.llvm.org/pipermail/llvm-dev/2018-October/126657.html

Differential revision: https://reviews.llvm.org/D52783

llvm-svn: 344140

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Clean up use of C allocation functions

If the value returned by `malloc`, `calloc` or `realloc` is not checked
for null pointer, this change replaces them for `safe_malloc`,
`safe_calloc` or `safe_r

Clean up use of C allocation functions

If the value returned by `malloc`, `calloc` or `realloc` is not checked
for null pointer, this change replaces them for `safe_malloc`,
`safe_calloc` or `safe_realloc`, which are defined in the namespace `llvm`.
These function report fatal error on out of memory.

In the plain C files, assertion statements are added to ensure that memory
is successfully allocated.

The aim of this change is to get better diagnostics of OOM on Windows.

Differential Revision: https://reviews.llvm.org/D43017

llvm-svn: 325661

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Replace TimeValue with TimePoint in BuildSystem.cpp. NFC.

llvm-svn: 286357

Add clang_free to libclang to free memory allocated in libclang.

One of the problems libclang tests has running under Windows is memory
allocated in libclang.dll but being freed in the test executab

Add clang_free to libclang to free memory allocated in libclang.

One of the problems libclang tests has running under Windows is memory
allocated in libclang.dll but being freed in the test executable, possibly
by a different memory manager. This patch exposes a new export function,
clang_free(), used to free any allocated memory with the same libclang.dll
memory manager that allocated the memory.

http://reviews.llvm.org/D10949

Reviewed by Reid Kleckner, Douglas Gregor.

llvm-svn: 241789

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VirtualFileSystem: Add YAMLVFSWriter to generate VFS mapping files

This moves the logic to write a JSON VFS mapping from the C api into
VirtualFileSystem, so that we can use it internally.

No funct

VirtualFileSystem: Add YAMLVFSWriter to generate VFS mapping files

This moves the logic to write a JSON VFS mapping from the C api into
VirtualFileSystem, so that we can use it internally.

No functional change.

llvm-svn: 209241

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Switch another write_escaped to yaml::escape

I missed one in r206443.

llvm-svn: 208941

When writing YAML in libclang, use yaml::escape instead of write_escaped

The YAMLParser has its own escaped string representation, and does not
handle octal escape sequences. When writing the virtua

When writing YAML in libclang, use yaml::escape instead of write_escaped

The YAMLParser has its own escaped string representation, and does not
handle octal escape sequences. When writing the virtual file system to a
YAML file, use yaml::escape().

llvm-svn: 206443

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[libclang] Introduce clang_VirtualFileOverlay_setCaseSensitivity that exposes the VFS option
to set the case-sensitivity for lookups.

rdar://16374696

llvm-svn: 204303

[cleanup] Re-sort includes with llvm/utils/sort_includes.py and fix
a missing include from CLog.h.

CLog.h referenced most of the core libclang types but never directly
included Index.h that provides

[cleanup] Re-sort includes with llvm/utils/sort_includes.py and fix
a missing include from CLog.h.

CLog.h referenced most of the core libclang types but never directly
included Index.h that provides them. Previously it got lucky and other
headers were always included first but with the sorting it ended up
first in one case and stopped compiling. Adding the Index.h include
fixes it right up.

llvm-svn: 202810

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[libclang] Introduce APIs that assist in constructing a simple module.map file for a user framework.

rdar://16092858

llvm-svn: 202681

[libclang] Change clang_VirtualFileOverlay_writeToBuffer to return a malloc'ed buffer.

Returning CXString is not appropriate if we want to switch to a non-string format buffer.

llvm-svn: 202675

[libclang] Introduce libclang APIs for creating a buffer with a JSON virtual file overlay description.

The current API only supports adding 'virtual file path' -> 'real file path' mappings.

rdar://

[libclang] Introduce libclang APIs for creating a buffer with a JSON virtual file overlay description.

The current API only supports adding 'virtual file path' -> 'real file path' mappings.

rdar://15986708

llvm-svn: 202105

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'svn add' files I forgot for r201224 (Add an option to allow Clang verify
source files for a module only once during)

llvm-svn: 201225