llvm-project.git/clang/lib/Lex/DependencyDirectivesScanner.cpp, branch users/MaskRay/spr/main.elf-orphan-placement-remove-hasinputsections-condition

Revert "Pass LangOpts from CompilerInstance to DependencyScanningWorker (#93753)" (#94488)

2024-06-05T18:42:13+00:00

This reverts commit 9862080b1cbf685c0d462b29596e3f7206d24aa2.

Pass LangOpts from CompilerInstance to DependencyScanningWorker (#93753)

2024-06-03T15:20:43+00:00

This commit fixes https://github.com/llvm/llvm-project/issues/88896 by
passing LangOpts from the CompilerInstance to
DependencyScanningWorker so that the original LangOpts are
preserved/respected.
This makes for more accurate parsing/lexing when certain language
versions or features specific to versions are to be used.

[NFC] Correct C++ standard names (#81421)

2024-02-11T18:43:34+00:00

[clang] Change GetCharAndSizeSlow interface to by-value style

2023-10-30T23:08:01+00:00

Instead of passing the Size by reference, assuming it is initialized,
return it alongside the expected char result as a POD.

This makes the interface less error prone: previous interface expected
the Size reference to be initialized, and it was often forgotten,
leading to uninitialized variable usage. This patch fixes the issue.

This also generates faster code, as the returned POD (a char and an
unsigned) fits in 64 bits. The speedup according to compile time tracker
reach -O.7%, with a good number of -0.4%. Details are available on

        https://llvm-compile-time-tracker.com/compare.php?from=3fe63f81fcb999681daa11b2890c82fda3aaeef5&to=fc76a9202f737472ecad4d6e0b0bf87a013866f3&stat=instructions:u

And icing on the cake, on my setup it also shaves 2kB out of
libclang-cpp :-)

This is a recommit of d8f5a18b6e587aeaa8b99707e87b652f49b160cd for

Revert "Perf/lexer faster slow get char and size (#70543)"

2023-10-30T01:11:39+00:00

This reverts commit d8f5a18b6e587aeaa8b99707e87b652f49b160cd.
Breaks build, see:
https://github.com/llvm/llvm-project/pull/70543#issuecomment-1784227421

Perf/lexer faster slow get char and size (#70543)

2023-10-29T18:17:02+00:00

Co-authored-by: serge-sans-paille

[clang][deps] Teach dep directive scanner about _Pragma

2023-05-09T17:05:12+00:00

While we cannot handle `_Pragma` used inside macros, we can handle
this at the top level, and it some projects use the `_Pragma("once")`
spelling like that, which was causing spurious failures in the scanner.

Limitations
* Cannot handle #define ONCE _Pragma("once"), same issue as using
  @import in a macro -- ideally we should diagnose this in obvious cases
* Our LangOpts are currently fixed, so we are not handling u"" strings
  or R"()" strings that require C11/C++11.

rdar://108629982

Differential Revision: https://reviews.llvm.org/D149884

[clang][deps] Teach dep directive scanner about #pragma clang system_header

2023-05-03T20:53:21+00:00

This ensures we get the correct FileCharacteristic during scanning. In a
yet-to-be-upstreamed branch this fixes observable failures, but it's
also good to handle this on principle: the FileCharacteristic is a
property of the file that is observable in the scanner, so there is
nothing preventing us from depending on it.

rdar://108627403

Differential Revision: https://reviews.llvm.org/D149777

[clang] Use std::optional instead of llvm::Optional (NFC)

2023-01-14T20:31:01+00:00

This patch replaces (llvm::|)Optional< with std::optional<.  I'll post
a separate patch to remove #include "llvm/ADT/Optional.h".

This is part of an effort to migrate from llvm::Optional to
std::optional:

https://discourse.llvm.org/t/deprecating-llvm-optional-x-hasvalue-getvalue-getvalueor/63716

[clang] Add #include (NFC)

2023-01-14T19:07:21+00:00

This patch adds #include  to those files containing
llvm::Optional<...> or Optional<...>.

I'll post a separate patch to actually replace llvm::Optional with
std::optional.

This is part of an effort to migrate from llvm::Optional to
std::optional:

https://discourse.llvm.org/t/deprecating-llvm-optional-x-hasvalue-getvalue-getvalueor/63716