SourceManager: Make LastLineNoContentCache and ContentCache::SourceLineCache mutable, NFC

Avoid some noisy `const_cast`s by making `ContentCache::SourceLineCache`
and `SourceManager::LastLineNoConte

SourceManager: Make LastLineNoContentCache and ContentCache::SourceLineCache mutable, NFC

Avoid some noisy `const_cast`s by making `ContentCache::SourceLineCache`
and `SourceManager::LastLineNoContentCache` both mutable.

Differential Revision: https://reviews.llvm.org/D89914

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SourceManager: Encapsulate line number mapping into SrcMgr::LineOffsetMapping

Put the guts of `ComputeLineNumbers` into `LineOffsetMapping::get` and
`LineOffsetMapping::LineOffsetMapping`. As a dri

SourceManager: Encapsulate line number mapping into SrcMgr::LineOffsetMapping

Put the guts of `ComputeLineNumbers` into `LineOffsetMapping::get` and
`LineOffsetMapping::LineOffsetMapping`. As a drive-by, store the number
of lines directly in the bump-ptr-allocated array.

Differential Revision: https://reviews.llvm.org/D89913

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SourceManager: Clarify that FileInfo always has a ContentCache, NFC

It turns out that `FileInfo` *always* has a ContentCache. Clarify that
in the code:
- Update the private version of `SourceManager

SourceManager: Clarify that FileInfo always has a ContentCache, NFC

It turns out that `FileInfo` *always* has a ContentCache. Clarify that
in the code:
- Update the private version of `SourceManager::createFileID` to take a
`ContentCache&` instead of `ContentCache*`, and rename it to
`createFileIDImpl` for clarity.
- Change `FileInfo::getContentCache` to return a reference.

Differential Revision: https://reviews.llvm.org/D89554

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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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[Lex] Use WritableMemoryBuffer in ScratchBuffer.cpp

This avoids the need to const_cast the buffer contents to write to it.

NFCI.

llvm-svn: 322268

PR33902: Invalidate line number cache when adding more text to existing buffer.

This led to crashes as the line number cache would report a bogus line number
for a line of code, and we'd try to find

PR33902: Invalidate line number cache when adding more text to existing buffer.

This led to crashes as the line number cache would report a bogus line number
for a line of code, and we'd try to find a nonexistent column within the line
when printing diagnostics.

llvm-svn: 309503

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MSan told me that we actually dump the entire scratch buffer into PCH files, initialize it.

Writing 4k of zeros is preferrable to 4k of random memory. Document that. While
there remove the initializ

MSan told me that we actually dump the entire scratch buffer into PCH files, initialize it.

Writing 4k of zeros is preferrable to 4k of random memory. Document that. While
there remove the initialization of the first byte of the buffer and start at
index zero. It was writing a literal '0' instead of a null byte at the
beginning anyways, which didn't matter since we never read it.

llvm-svn: 234202

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Prefer uninitialized memory for scratch space.

No functional change intended.

llvm-svn: 234184

unique_ptrify SourceManager::createFileID

llvm-svn: 216715

Update for LLVM api change.

llvm-svn: 216585

[C++11] Use 'nullptr'. Lex edition.

llvm-svn: 209083

Rename SourceManager::createFileIDForMemBuffer()

It makes more sense to just overload createFileID().

Gardening only.

llvm-svn: 209002

Rename SourceLocation::getFileLocWithOffset -> getLocWithOffset.

It already works (and is useful with) macro locs as well.

llvm-svn: 140057

Remove tabs, and whitespace cleanups.

llvm-svn: 81346

add \n characters to the scratch buffer *before* returned tokens.
This prevents caret diagnostics from the scratch buffer from
including other tokens in the scratch buffer that occurred beforei
th

add \n characters to the scratch buffer *before* returned tokens.
This prevents caret diagnostics from the scratch buffer from
including other tokens in the scratch buffer that occurred beforei
them.

llvm-svn: 66375

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simplify some logic by making ScratchBuffer handle the application of trailing
\0's to created tokens instead of making all clients do it. No functionality
change.

llvm-svn: 66373

This change refactors some of the low-level lexer interfaces a bit.
Token now has a class of kinds for "literals", which include
numeric constants, strings, etc. These tokens can optionally have
a

This change refactors some of the low-level lexer interfaces a bit.
Token now has a class of kinds for "literals", which include
numeric constants, strings, etc. These tokens can optionally have
a pointer to the start of the token in the lexer buffer. This
makes it faster to get spelling and do other gymnastics, because we
don't have to go through source locations.

This change is performance neutral, but will make other changes
more feasible down the road.

llvm-svn: 63028

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Check in the long promised SourceLocation rewrite. This lays the
ground work for implementing #line, and fixes the "out of macro ID's"
problem.

There is nothing particularly tricky about the code,

Check in the long promised SourceLocation rewrite. This lays the
ground work for implementing #line, and fixes the "out of macro ID's"
problem.

There is nothing particularly tricky about the code, other than the
very performance sensitive SourceManager::getFileID() method.

llvm-svn: 62978

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Make some enums in SourceLocation private, remove a useless assertion from ScratchBuffer.

llvm-svn: 62492

this massive patch introduces a simple new abstraction: it makes
"FileID" a concept that is now enforced by the compiler's type checker
instead of yet-another-random-unsigned floating around.

This i

this massive patch introduces a simple new abstraction: it makes
"FileID" a concept that is now enforced by the compiler's type checker
instead of yet-another-random-unsigned floating around.

This is an important distinction from the "FileID" currently tracked by
SourceLocation. *That* FileID may refer to the start of a file or to a
chunk within it. The new FileID *only* refers to the file (and its
#include stack and eventually #line data), it cannot refer to a chunk.

FileID is a completely opaque datatype to all clients, only SourceManager
is allowed to poke and prod it.

llvm-svn: 62407

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Make a major restructuring of the clang tree: introduce a top-level
lib dir and move all the libraries into it. This follows the main
llvm tree, and allows the libraries to be built in parallel. Th

Make a major restructuring of the clang tree: introduce a top-level
lib dir and move all the libraries into it. This follows the main
llvm tree, and allows the libraries to be built in parallel. The
top level now enforces that all the libs are built before Driver,
but we don't care what order the libs are built in. This speeds
up parallel builds, particularly incremental ones.

llvm-svn: 48402

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