[Clang][Sema] Skip RecordDecl when checking scope of declarations (#69432)

In non C++ mode, struct definitions does not create a scope for
declaration.

[NFC][clang] Fix static analyzer concerns

IdDeclInfoMap frees resources in the destructor but doesn't
have user-written copy c'tor or assignment operator, so copying it using
default ones can cause

[NFC][clang] Fix static analyzer concerns

IdDeclInfoMap frees resources in the destructor but doesn't
have user-written copy c'tor or assignment operator, so copying it using
default ones can cause double free.

Reviewed By: aaron.ballman

Differential Revision: https://reviews.llvm.org/D156904

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[clang] NFC: Modernize Decl iteration via IdentifierResolver

[HLSL] Support cbuffer/tbuffer for hlsl.

This is first part for support cbuffer/tbuffer.

The format for cbuffer/tbuffer is
BufferType [Name] [: register(b#)] { VariableDeclaration [: packoffset(c#.

[HLSL] Support cbuffer/tbuffer for hlsl.

This is first part for support cbuffer/tbuffer.

The format for cbuffer/tbuffer is
BufferType [Name] [: register(b#)] { VariableDeclaration [: packoffset(c#.xyzw)]; ... };

More details at https://docs.microsoft.com/en-us/windows/win32/direct3dhlsl/dx-graphics-hlsl-constants

New keyword 'cbuffer' and 'tbuffer' are added.
New AST node HLSLBufferDecl is added.
Build AST for simple cbuffer/tbuffer without attribute support.

The special thing is variables declared inside cbuffer is exposed into global scope.
So isTransparentContext should return true for HLSLBuffer.

Reviewed By: aaron.ballman

Differential Revision: https://reviews.llvm.org/D129883

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[clang] Qualify auto in range-based for loops (NFC)

Reland "[Clang][Sema] Fix invalid redefinition error in if/switch/for statement"

This reverts commit 9f075c3d84fb359efb6496535ab397a6f09609e2.
The broken build has alreasy been fixed in D124012, so

Reland "[Clang][Sema] Fix invalid redefinition error in if/switch/for statement"

This reverts commit 9f075c3d84fb359efb6496535ab397a6f09609e2.
The broken build has alreasy been fixed in D124012, so reland it now.
Signed-off-by: Jun Zhang <jun@junz.org>

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Revert "[Clang][Sema] Fix invalid redefinition error in if/switch/for statement"

This reverts commit be0905a333d6f7c4d7f5c70c18211463e53473cd.
This patch broke build addressed in https://github.com/

Revert "[Clang][Sema] Fix invalid redefinition error in if/switch/for statement"

This reverts commit be0905a333d6f7c4d7f5c70c18211463e53473cd.
This patch broke build addressed in https://github.com/llvm/llvm-project/issues/54968
Signed-off-by: Jun Zhang <jun@junz.org>

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Add some helpers to better check Scope's kind. NFC

Signed-off-by: Jun Zhang <jun@junz.org>

[Clang][Sema] Fix invalid redefinition error in if/switch/for statement

Clang should no longer incorrectly diagnose a variable declaration inside of a
lambda expression that shares the name of a var

[Clang][Sema] Fix invalid redefinition error in if/switch/for statement

Clang should no longer incorrectly diagnose a variable declaration inside of a
lambda expression that shares the name of a variable in a containing
if/while/for/switch init statement as a redeclaration.

After this patch, clang is supposed to accept code below:

void foo() {
for (int x = [] { int x = 0; return x; }(); ;) ;
}

Fixes https://github.com/llvm/llvm-project/issues/54913

Differential Revision: https://reviews.llvm.org/D123840

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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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[AST] Various optimizations + refactoring in DeclarationName(Table)

Introduce the following optimizations in DeclarationName(Table):

1. Store common kinds inline in DeclarationName instead of

[AST] Various optimizations + refactoring in DeclarationName(Table)

Introduce the following optimizations in DeclarationName(Table):

1. Store common kinds inline in DeclarationName instead of
DeclarationNameExtra. Currently the kind of C++ constructor, destructor,
conversion function and overloaded operator names is stored in
DeclarationNameExtra. Instead store it inline in DeclarationName.
To do this align IdentifierInfo, CXXSpecialName, DeclarationNameExtra
and CXXOperatorIdName to 8 bytes so that we can use the lower 3 bits of
DeclarationName::Ptr. This is already the case on 64 bits archs anyway.
This also allow us to remove DeclarationNameExtra from CXXSpecialName
and CXXOperatorIdName, which shave off a pointer from CXXSpecialName.

2. Synchronize the enumerations DeclarationName::NameKind,
DeclarationName::StoredNameKind and Selector::IdentifierInfoFlag.
This makes DeclarationName::getNameKind much more efficient since we can
replace the switch table by a single comparison and an addition.

3. Put the overloaded operator names inline in DeclarationNameTable to remove
an indirection. This increase the size of DeclarationNameTable a little
bit but this is not important since it is only used in ASTContext, and
never copied nor moved from. This also get rid of the last dynamic
allocation in DeclarationNameTable.

Altogether these optimizations cut the run time of parsing all of Boost by
about 0.8%. While we are at it, do the following NFC modifications:

1. Put the internal classes CXXSpecialName, CXXDeductionGuideNameExtra,
CXXOperatorIdName, CXXLiteralOperatorIdName and DeclarationNameExtra
in a namespace detail since these classes are only meant to be used by
DeclarationName and DeclarationNameTable. Make this more explicit by making
the members of these classes private and friending DeclarationName(Table).

2. Make DeclarationName::getFETokenInfo a non-template since every users are
using it to get a void *. It was supposed to be used with a type to avoid
a subsequent static_cast.

3. Change the internal functions DeclarationName::getAs* to castAs* since when
we use them we already know the correct kind. This has no external impact
since all of these are private.

Reviewed By: erichkeane, rjmccall

Differential Revision: https://reviews.llvm.org/D52267

llvm-svn: 342729

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Remove trailing space

sed -Ei 's/[[:space:]]+$//' include/**/*.{def,h,td} lib/**/*.{cpp,h}

llvm-svn: 338291

Remove \brief commands from doxygen comments.

This is similar to the LLVM change https://reviews.llvm.org/D46290.

We've been running doxygen with the autobrief option for a couple of
years now. Thi

Remove \brief commands from doxygen comments.

This is similar to the LLVM change https://reviews.llvm.org/D46290.

We've been running doxygen with the autobrief option for a couple of
years now. This makes the \brief markers into our comments
redundant. Since they are a visual distraction and we don't want to
encourage more \brief markers in new code either, this patch removes
them all.

Patch produced by

for i in $(git grep -l '\@brief'); do perl -pi -e 's/\@brief //g' $i & done
for i in $(git grep -l '\\brief'); do perl -pi -e 's/\\brief //g' $i & done

Differential Revision: https://reviews.llvm.org/D46320

llvm-svn: 331834

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[Sema] Revert r329346 because of memory sanitizer failures.

llvm-svn: 329357

[Sema] Fix some Clang-tidy modernize and Include What You Use warnings; other minor fixes (NFC).

llvm-svn: 329346

[Sema] Fix some Clang-tidy modernize and Include What You Use warnings; other minor fixes (NFC).

llvm-svn: 325659

[modules] Separately track whether an identifier's preprocessor information and
name lookup information have changed since deserialization. For a C++ modules
build, we do not need to re-emit the iden

[modules] Separately track whether an identifier's preprocessor information and
name lookup information have changed since deserialization. For a C++ modules
build, we do not need to re-emit the identifier into the serialized identifier
table if only the name lookup information has changed (and in all cases, we
don't need to re-emit the macro information if only the name lookup information
has changed).

llvm-svn: 259901

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[modules] Remove redundant import of lexical decls when building a lookup table
for a DeclContext, and fix propagation of exception specifications along
redeclaration chains.

This reverts r232905, r

[modules] Remove redundant import of lexical decls when building a lookup table
for a DeclContext, and fix propagation of exception specifications along
redeclaration chains.

This reverts r232905, r232907, and r232907, which reverted r232793, r232853,
and r232853.

One additional change is present here to resolve issues with LLDB: distinguish
between whether lexical decls missing from the lookup table are local or are
provided by the external AST source, and still look in the external source if
that's where they came from.

llvm-svn: 232928

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Reverting r232793 until some new LLDB failures are discussed

llvm-svn: 232905

[modules] Remove some redundant work when building a lookup table for a DeclContext.

When we need to build the lookup table for a DeclContext, we used to pull in
all lexical declarations for the con

[modules] Remove some redundant work when building a lookup table for a DeclContext.

When we need to build the lookup table for a DeclContext, we used to pull in
all lexical declarations for the context; instead, just build a lookup table
for the local lexical declarations. We previously didn't guarantee that the
imported declarations would be in the returned map, but in some cases we'd
happen to put them all in there regardless. Now we're even lazier about this.

This unnecessary work was papering over some other bugs:

- LookupVisibleDecls would use the DC for name lookups in the TU in C, and
this was not guaranteed to find all imported names (generally, the DC for
the TU in C is not a reliable place to perform lookups). We now use an
identifier-based lookup mechanism for this.

- We didn't actually load in the list of eagerly-deserialized declarations
when importing a module (so external definitions in a module wouldn't be
emitted by users of those modules unless they happened to be deserialized
by the user of the module).

llvm-svn: 232793

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[modules] Rework merging of redeclaration chains on module import.

We used to save out and eagerly load a (potentially huge) table of merged
formerly-canonical declarations when we loaded each modul

[modules] Rework merging of redeclaration chains on module import.

We used to save out and eagerly load a (potentially huge) table of merged
formerly-canonical declarations when we loaded each module. This was extremely
inefficient in the presence of large amounts of merging, and didn't actually
save any merging lookup work, because we still needed to perform name lookup to
check that our merged declaration lists were complete. This also resulted in a
loss of laziness -- even if we only needed an early declaration of an entity, we
would eagerly pull in all declarations that had been merged into it regardless.

We now store the relevant fragments of the table within the declarations
themselves. In detail:

* The first declaration of each entity within a module stores a list of first
declarations from imported modules that are merged into it.
* Loading that declaration pre-loads those other entities, so that they appear
earlier within the redeclaration chain.
* The name lookup tables list the most recent local lookup result, if there
is one, or all directly-imported lookup results if not.

llvm-svn: 231424

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PR20769: Fix confusion when checking whether a prior default argument was in
scope when checking for conflicts.

llvm-svn: 216628

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

llvm-svn: 209613

[C++11] Replacing iterators redecls_begin() and redecls_end() with iterator_range redecls(). Updating all of the usages of the iterators with range-based for loops, which allows the begin/end forms t

[C++11] Replacing iterators redecls_begin() and redecls_end() with iterator_range redecls(). Updating all of the usages of the iterators with range-based for loops, which allows the begin/end forms to be removed entirely.

llvm-svn: 203179

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Per [dcl.meaning]p1, a name in an inline namespace can be redeclared using a
name from the enclosing namespace set if the name is specified as a
qualified-id.

llvm-svn: 196464