[clang][ssaf] Add static-library create subcommand (#208799)
This change adds `clang-ssaf-linker static-library create` for bundling
TU summaries into a StaticLibrary archive. The linker has been
refactored to dispatch on `cl::SubCommand`; invocations without a
subcommand still run the existing linker pipeline unchanged for backward
compatibility.
rdar://181930526
[BOLT] Add fdata symbols mode (#209932)
Add a new fdata profile mode accepting symbol names as-is.
It addresses the UX gap surfaced by #208313 that all methods of selecting
functions to process (symbolized profile types, `-funcs*` options) expect
disambiguated local symbols.
Introduce fdata mode activated by a `symbols` header line, where each subsequent
line is a (mangled) symbol name. The names are matched against restored function
names (with disambiguation suffix stripped), and every matching function gets an
execution count of 1.
This can be used to drive selective instrumentation (`--instrument-hot-only`) or
basic linker-script style optimizations.
Symbols are stored as branch entry data so matching reuses the existing default
branch profile path.
Test Plan:
Update docs/profiles.md and add profile-symbols-mode.s
[orc-rt] Add asCCallback utility -- C callbacks for methods. (#210048)
Adds orc_rt::asCCallback<&Class::method>, which produces a C-ABI
function pointer that forwards to the given member function. The first
parameter of the generated trampoline is an opaque context pointer (
void * for non-const methods, const void * for const methods) that is
cast back to the class type and used as the receiver:
struct Counter {
void inc(int N) { Count += N; }
int Count = 0;
};
Counter C;
void (*CB)(void *, int) = asCCallback<&Counter::inc>;
CB(asCCallbackContext<&Counter::inc>(C), 2); // C.Count == 2
asCCallbackContext produces the matching context pointer via
static_cast, so any base-class offset is applied and const-ness is
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[libc][math] Fix double-rounding errors with denormal inputs for hypot function. (#208247)
The issue was reported by Paul Zimmermann.
Solution: for denormal inputs, we use 1.0 + x trick after proper scaling
to mimick rounding at denormal scale.
gn build: Support building debug binaries from a release build directory.
This change makes it so that all binaries in `bin` have a corresponding
debug binary target `$TARGET.dbg` that will build a debug binary in
`bin.dbg/$TARGET`. This is implemented using a separate toolchain for
the debug builds. This has the following advantages over a separate
debug build directory:
1. Can use release mode tblgen to generate code for the debug build
binaries, which speeds up the build because it can run tblgen faster as
well as being able to reuse the tblgen binary from the release build.
2. Can reuse runtimes built in the release mode clang's resource
directory, avoiding the need to build them again with a slow debug
build of clang.
Assisted-by: gemini
Reviewers: aeubanks, nico
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[docs] Finish MyST migration for BOLT docs (#210199)
Tracking issue: #201242
See the [migration guide] for more information.
[migration guide]:
https://llvm.org/docs/SphinxQuickstartTemplate.html#markdown-migration-guidelines
This is a stacked PR based on #210198, which will be a standalone commit
that
renames *.rst -> *.md before this PR lands for history preservation
purposes.
This was prepared with rst2myst plus LLM-assisted cleanup. I paged
through all the generated HTML looking for migration artifacts, and all
of the differences I could find appear to be formatting error
corrections. Please spot check my work and approve if it looks good. You
can use the HTML links below to confirm it renders properly.
-----
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[bolt][docs] Rename BOLT docs to Markdown (#210198)
Tracking issue: #201242
See the [migration guide] for more information.
[migration guide]:
https://llvm.org/docs/SphinxQuickstartTemplate.html#markdown-migration-guidelines
This is the initial straight rename commit. It will probably break the
docs build, but it has to be a separate PR for blame preservation
purposes.
[Hexagon] Add MC lit test for dropped fixups after packet relaxation (#210157)
Test that a branch fixup is preserved when MC relaxes a packet
containing a conditional compare-and-jump due to a following .p2align
directive. Regression test for issue #163851.
[WebAssembly] Don't assert on a non-zero call_indirect table index (#210120)
WebAssemblyInstPrinter::printInst asserted that a non-symbol table
operand of call_indirect is the immediate 0, on the assumption that only
MVP single-table compilation units reach the printer. That is true for
code generated by the compiler, but the printer is shared by the
disassembler.
The disassembler must produce output for any byte sequence it is pointed
at and shouldn't abort on the operand values it decodes. A non-zero
immediate table index is both a valid encoding, from a multi-table
module, and a routine result of best-effort disassembly of a range that
is not all code, which is how I hit this in LLDB.
Print the table operand when it is a symbol or a non-zero immediate, and
omit it only for the implicit table 0. This makes the output lossless
and unambiguous, matching how a table symbol is already printed. MVP and
table-symbol output are unchanged, so there is no effect on the
compiler's assembly.
[SLP]Drop nsw when reordering a sub feeding icmp eq/ne 0
A sub used only by icmp eq/ne 0 is treated as commutative, so SLP may
swap its operands, and nsw does not survive a - b -> b - a (a - b can
be INT_MIN while b - a overflows).
Fixes #210177
Reviewers:
Pull Request: https://github.com/llvm/llvm-project/pull/210205
[lldb][test] Allow dotest.py to call for Xcode to attach (#209628)
This speeds up the debugging of API tests a little on macOS.
(AppleScript written by Claude based on Xcode.sdef)
[clang][mingw] Try both native and ARM64EC triples when looking for a sysroot on the ARM64EC target (#210017)
Similarly to MSVC, a MinGW toolchain may provide support for both ARM64
and ARM64EC in a single sysroot. Structuring the toolchain this way has
the additional advantage of seamlessly supporting linking ARM64X images.
Support this configuration in findClangRelativeSysroot.
[NFC][LSR] Remove duplicate debug expression update (#210188)
Remove duplicate debug expression update we assigned
the same DIExpression twice so let's just remove the redundant call.
Tested via make check.
Assisted by AI.
[libc] Move gettimeofday to sys/time.h header. (#210185)
`gettimeofday` is supposed to be declared in the `<sys/time.h>` header,
not the `<time.h>` where we've had it previously. Move the declaration
to the correct header, and move the files with implementation and unit
tests accordingly.
Note that `gettimeofday` is removed removed from POSIX-2024, but let's
keep it available for now, since there's fair amount of existing code
that still uses it.
[NFC] Inline DwarfExpression frame register check (#210186)
Inline DwarfExpression frame register check as it's the only call.
Tested via make check.
Assisted by AI.
