This reverts commit b92d6dd704d789240685a336ad8b25a9f381b4cc. See
github.com/llvm/llvm-project/commit/b92d6dd704d7#commitcomment-139992444
We should use a tool like Visual Studio to clean up the headers.
This implements the annotation of the values in TableGen.
The main changes are,
- parseTableGenValue(), the simplified parser method for the syntax of
values.
- modified consumeToken() to parseTableGenValue in 'if', 'assert' and
after '='.
- modified parseParens() to call parseTableGenValue inside.
- modified parseSquare() to to call parseTableGenValue inside, with
skipping separator tokens.
- modified parseAngle() to call parseTableGenValue inside, with skipping
separator tokens.
Adds the support for tokens that have forms like unary operators.
- bang operators: `!name`
- cond operator: `!cond`
- numeric literals: `+1`, `-1`
cond operator are one of bang operators but is distinguished because it has very specific syntax.
This patch replaces uses of StringRef::{starts,ends}with with
StringRef::{starts,ends}_with for consistency with
std::{string,string_view}::{starts,ends}_with in C++20.
I'm planning to deprecate and eventually remove
StringRef::{starts,ends}with.
The Verilog implication operator `->` is a binary operator meaning
either the left hand side is false or the right hand side is true.
Previously it was treated as the C++ struct member operator.
I didn't even know it existed when I added the operator formatting part.
And I didn't check all the tests for all the operators I added. That is
how the bad test got in.
If a non-keyword identifier is found in TypeNames, then a *, &, or && that
follows it is annotated as TT_PointerOrReference.
Differential Revision: https://reviews.llvm.org/D155273
The token annotator doesn't annotate the template opener and closer
as such if they enclose an overloaded operator. This causes the
space between the operator and the closer to be removed, resulting
in invalid C++ code.
Fixes#58602.
Differential Revision: https://reviews.llvm.org/D143755
The token annotator doesn't annotate the template opener and closer
as such if they enclose an overloaded operator. This causes the
space between the operator and the closer to be removed, resulting
in invalid C++ code.
Fixes#58602.
Differential Revision: https://reviews.llvm.org/D143755
Different loop termination conditions resulted in confusion of whether
*Offset was intended to be inside or outside the token.
This ultimately led to constructing an out-of-range SourceLocation.
Fix by making Offset consistently point *after* the token.
Differential Revision: https://reviews.llvm.org/D135356
This change fixes a clang-format unit test failure introduced by [D124748](https://reviews.llvm.org/D124748). The `countLeadingWhitespace` function was calling `isspace` with values that could fall outside the valid input range. The valid input range for `isspace` is unsigned 0-255. Values outside this range produce undefined behavior, which on Windows manifests as an assertion being raised in the debug runtime libraries. `countLeadingWhitespace` was calling `isspace` with a signed char that could produce a negative value if the underlying byte's value was 128 or above, which can happen for non-ASCII encodings. The fix is to use `StringRef`'s `bytes_begin` and `bytes_end` iterators to read the values as unsigned chars instead.
This bug can be reproduced by building the `check-clang-unit` target with a DEBUG configuration under Windows. This change is already covered by existing unit tests.
Reviewed By: MyDeveloperDay
Differential Revision: https://reviews.llvm.org/D128786
The setLength function checks for the token kind which could be
uninitialized in the previous version.
The problem was introduced in 2e32ff106e.
Reviewed By: MyDeveloperDay, owenpan
Differential Revision: https://reviews.llvm.org/D128607
Verilog uses the backtick instead of the hash. In this revision
backticks are lexed manually and then get labeled as hashes so the logic
for handling C preprocessor stuff don't have to change. Hashes get
labeled as identifiers for Verilog-specific stuff like delays.
Reviewed By: HazardyKnusperkeks
Differential Revision: https://reviews.llvm.org/D124749
The current way of counting whitespace would count backticks as
whitespace. For Verilog stuff we need backticks to be handled
correctly. For JavaScript the current way is to compare the entire
token text to see if it's a backtick. However, when the backtick is the
first token following an escaped newline, the escaped newline will be
part of the tok::unknown token. Verilog has macros and escaped newlines
unlike JavaScript. So we can't regard an entire tok::unknown token as
whitespace. Previously, the start of every token would be matched for
newlines. Now, it is all whitespace instead of just newlines.
The column counting problem has already been fixed for JavaScript in
e71b4cbdd140f059667f84464bd0ac0ebc348387 by counting columns elsewhere.
Reviewed By: HazardyKnusperkeks
Differential Revision: https://reviews.llvm.org/D124748
This reverts commit 50cd52d9357224cce66a9e00c9a0417c658a5655.
It provoked regressions in C++ and ObjectiveC as described in https://reviews.llvm.org/D123676#3515949.
Reproducers:
```
MACRO_BEGIN
#if A
int f();
#else
int f();
#endif
```
```
NS_SWIFT_NAME(A)
@interface B : C
@property(readonly) D value;
@end
```
Fixes https://github.com/llvm/llvm-project/issues/54522.
This fixes regression introduced in 5e5efd8a91.
Before the culprit commit, macros in WhitespaceSensitiveMacros were correctly formatted even if their closing parenthesis weren't followed by semicolon (or, to be precise, when they were followed by a newline).
That commit changed the type of the macro token type from TT_UntouchableMacroFunc to TT_FunctionLikeOrFreestandingMacro.
Correct formatting (with `WhitespaceSensitiveMacros = ['FOO']`):
```
FOO(1+2)
FOO(1+2);
```
Regressed formatting:
```
FOO(1 + 2)
FOO(1+2);
```
Reviewed By: HazardyKnusperkeks, owenpan, ksyx
Differential Revision: https://reviews.llvm.org/D123676
This change can be seen as code cleanup but motivation is more performance related.
While browsing perf reports captured during Linux build we can notice unusual portion of instructions executed in std::vector<std::string> copy constructor like:
0.59% 0.58% clang-14 clang-14 [.] std::vector<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >,
std::allocator<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > > >::vector
or even:
1.42% 0.26% clang clang-14 [.] clang::LangOptions::LangOptions
|
--1.16%--clang::LangOptions::LangOptions
|
--0.74%--std::vector<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >,
std::allocator<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > > >::vector
After more digging we can see that relevant LangOptions std::vector members (*Files, ModuleFeatures and NoBuiltinFuncs)
are constructed when Lexer::LangOpts field is initialized on list:
Lexer::Lexer(..., const LangOptions &langOpts, ...)
: ..., LangOpts(langOpts),
Since LangOptions copy constructor is called by Lexer(..., const LangOptions &LangOpts,...) and local Lexer objects are created thousands times
(in Lexer::getRawToken, Preprocessor::EnterSourceFile and more) during single module processing in frontend it makes std::vector copy constructors surprisingly hot.
Unfortunately even though in current Lexer implementation mentioned std::vector members are unused and most of time empty,
no compiler is smart enough to optimize their std::vector copy constructors out (take a look at test assembly): https://godbolt.org/z/hdoxPfMYY even with LTO enabled.
However there is simple way to fix this. Since Lexer doesn't access *Files, ModuleFeatures, NoBuiltinFuncs and any other LangOptions fields (but only LangOptionsBase)
we can simply get rid of redundant copy constructor assembly by changing LangOpts type to more appropriate const LangOptions reference: https://godbolt.org/z/fP7de9176
Additionally we need to store LineComment outside LangOpts because it's written in SkipLineComment function.
Also FormatTokenLexer need to be adjusted a bit to avoid lifetime issues related to passing local LangOpts reference to Lexer.
After this change I can see more than 1% speedup in some of my microbenchmarks when using Clang release binary built with LTO.
For Linux build gains are not so significant but still nice at the level of -0.4%/-0.5% instructions drop.
Differential Revision: https://reviews.llvm.org/D120334
This factors out a pattern that comes up from time to time.
Reviewed By: MyDeveloperDay, HazardyKnusperkeks, owenpan
Differential Revision: https://reviews.llvm.org/D117769
Fixes https://github.com/llvm/llvm-project/issues/44601.
This patch handles a bug when parsing a below example code :
```
template <class> class S;
template <class T> bool operator<(S<T> const &x, S<T> const &y) {
return x.i < y.i;
}
template <class T> class S {
int i = 42;
friend bool operator< <>(S const &, S const &);
};
int main() { return S<int>{} < S<int>{}; }
```
which parse `< <>` as `<< >`, not `< <>` in terms of tokens as discussed in discord.
1. Add a condition in `tryMergeLessLess()` considering `operator` keyword and `>`
2. Force to leave a whitespace between `tok::less` and a template opener
3. Add unit test
Reviewed By: MyDeveloperDay, curdeius
Differential Revision: https://reviews.llvm.org/D117398
