The API actually passes and returns ownership too, but the usage uis
complicated enough that I'm not going to unique_ptr-ify those add/remove
calls.

OperationHandle mostly existed to mirror the behavior of ValueHandle.
This has become unnecessary and can be retired.

Differential Revision: https://reviews.llvm.org/D78692

Summary:
This patch adds support to access AArch64 FP SIMD core dump registers and adds a test case to verify registers.

This patches fixes a bug where doing "register read --all" causes lldb to crash.

Reviewers: labath

Reviewed By: labath

Subscribers: kristof.beyls, danielkiss, lldb-commits

Differential Revision: https://reviews.llvm.org/D77793

Now that the rest of LLVM prefers python3 over python2, the LLDB path
should follow suite.  Add a fallback path to python2 for non-Windows
targets.

Summary: This patch increases maximum register size to 256 bytes to accommodate AArch64 SVE registers maximum possible size of 256 bytes.

Reviewers: labath, jankratochvil, rengolin

Reviewed By: labath

Subscribers: tschuett, kristof.beyls, danielkiss, lldb-commits

Differential Revision: https://reviews.llvm.org/D77044

The FileSpec constructor takes a StringRef so there's no point in going
through a C string.

The SwiftASTContext queries this function in parallel and requires
synchronization.

Nothing guarantees that the objects in the StringMap remains at the same
address when the StringMap grows. Therefore we shouldn't return a
reference into the StringMap but return a copy of the string instead.

This patch helps make the short options displayed in the help message be consistant with the description in https://llvm.org/docs/CommandGuide/dsymutil.html

Reviewed By: JDevlieghere, aprantl

Differential Revision: https://reviews.llvm.org/D78476

Call getNegatedExpression(Cost) and check the Cost to make the code more clear.

Reviewed By: RKSimon

Differential Revision: https://reviews.llvm.org/D78347

The Python3 change relanded yet again, so merge it yet again.

This reverts commit f0019cdc.
This reverts commit 854a7db4.

Fix a few bugs where we would fail to properly determine header to
module correspondence when determining whether to suggest a #include or
import, and suggest a #include more often in language modes where there
is no import syntax. Generally, if the target is in a header with
include guards or #pragma once, we should suggest either #including or
importing that header, and not importing a module that happens to
textually include it.

In passing, improve the notes we attach to the corresponding
diagnostics: calling an entity that we couldn't see "previous" is
confusing.

This reverts commit 35edd704.

Revert the revert and extend the patch further to account for the use of
the `PYTHONINTERP_FOUND`.

This reverts commit cbaa74a0.
The Py3 change got (mostly, except compiler-rt) reverted again.

Summary:
This check will ensure that all calls to functions resolve to one inside the `__llvm_libc` namespace.

This is done to ensure that if we include a public header then we don't accidentally call into the a function within the global namespace.

Reviewers: aaron.ballman, njames93

Reviewed By: aaron.ballman

Subscribers: Eugene.Zelenko, mgorny, xazax.hun, cfe-commits, sivachandra

Tags: #clang-tools-extra, #libc-project, #clang

Differential Revision: https://reviews.llvm.org/D78890

This got reverted due to UBSAN errors in a diff lower in the stack,
which is being fixed in https://reviews.llvm.org/D79050. This diff is
otherwise identical to the original https://reviews.llvm.org/D76908
(which was committed in 9598778b and reverted in b52bc265).

Differential Revision: https://reviews.llvm.org/D79051

This diff implements basic support for writing a symbol table.

Attributes are loosely supported for extern symbols and not at all for
other types.

Initial version by Kellie Medlin <kelliem@fb.com>

Originally committed in a3d95a50 and reverted in fbae153c due to
UBSAN erroring over unaligned writes. That has been fixed in the
current diff with the following changes:

```
diff --git a/lld/MachO/SyntheticSections.cpp b/lld/MachO/SyntheticSections.cpp
--- a/lld/MachO/SyntheticSections.cpp
+++ b/lld/MachO/SyntheticSections.cpp
@@ -133,6 +133,9 @@ SymtabSection::SymtabSection(StringTableSection &stringTableSection)
     : stringTableSection(stringTableSection) {
   segname = segment_names::linkEdit;
   name = section_names::symbolTable;
+  // TODO: When we introduce the SyntheticSections superclass, we should make
+  // all synthetic sections aligned to WordSize by default.
+  align = WordSize;
 }

 size_t SymtabSection::getSize() const {
diff --git a/lld/MachO/Writer.cpp b/lld/MachO/Writer.cpp
--- a/lld/MachO/Writer.cpp
+++ b/lld/MachO/Writer.cpp
@@ -371,6 +371,7 @@ void Writer::assignAddresses(OutputSegment *seg) {
     ArrayRef<InputSection *> sections = p.second;
     for (InputSection *isec : sections) {
       addr = alignTo(addr, isec->align);
+      // We must align the file offsets too to avoid misaligned writes of
+      // structs.
+      fileOff = alignTo(fileOff, isec->align);
       isec->addr = addr;
       addr += isec->getSize();
       fileOff += isec->getFileSize();
@@ -396,6 +397,7 @@ void Writer::writeSections() {
     uint64_t fileOff = seg->fileOff;
     for (auto &sect : seg->getSections()) {
       for (InputSection *isec : sect.second) {
+        fileOff = alignTo(fileOff, isec->align);
         isec->writeTo(buf + fileOff);
         fileOff += isec->getFileSize();
       }
```

I don't think it's easy to write a test for alignment (that doesn't
involve brittly hard-coding file offsets), so there isn't one... but
UBSAN builds pass now.

Differential Revision: https://reviews.llvm.org/D79050

Summary:
Certain dwarf information (like the compilation directory), are only
accessible from the compile unit. Make it available for use.

Subscribers: aprantl, llvm-commits

Tags: #llvm

Differential Revision: https://reviews.llvm.org/D79048

as it seems to be causing multiple people problems with running tests
and building.

This reverts commit c4c3883b.

It allows it not to crash and analyze 16 bit subregs if those
appear in the instructions. At the same time it does not attempt
to reassign these. It still can correctly identify register
banks to let larger registers to be reassigned.

More work will be needed here when real instructions will use
these registers and more tests as well.

Differential Revision: https://reviews.llvm.org/D78772

Reviewers: sivachandra, abrachet

Reviewed By: abrachet

Subscribers: mgorny, tschuett, libc-commits

Tags: #libc-project

Differential Revision: https://reviews.llvm.org/D79016

This reverts commit faf2dce1.

This reverts commit ad38f4b3.

As it broke building the unittests:

.../sources/llvm-project/llvm/unittests/Support/Path.cpp:334:5: error: use of undeclared identifier 'set'
    set(Value);
    ^
1 error generated.

Summary:
This is a small improvement for OpenCL diagnostics, but is also useful
for our CHERI fork, as our __capability qualifier is suppressed from
diagnostics when all pointers are capabilities, only being used when pointers
need to be explicitly opted-in to being capabilities.

Reviewers: rsmith, Anastasia, aaron.ballman

Reviewed By: Anastasia, aaron.ballman

Subscribers: aaron.ballman, arichardson, cfe-commits

Tags: #clang

Differential Revision: https://reviews.llvm.org/D78777

These are only needed as VGPR counterpart.

Differential Revision: https://reviews.llvm.org/D78597

Add missing ifndef to make release builds happy.

Example failure: http://lab.llvm.org:8011/builders/fuchsia-x86_64-linux/builds/4006/steps/ninja-build/logs/stdio

[X86] Add PACK instructions to hasUndefRegUpdate so the BreakFalseDeps pass will reassign an undef second source to match the first source

We generate PACK instructions with an undef second source when we are truncating from a 128-bit vector to something narrower and we don't care about the upper bits of the vector register. The register allocation process will always assign untied undef uses to xmm0. This creates a false dependency on xmm0.

By adding these instructions to hasUndefRegUpdate, we can get the BreakFalseDeps pass to reassign the source to match the other input. Normally this interface is used for instructions that might need an xor inserted to break the dependency. But the pass also has a heuristic that tries to use the same register as other sources. That should always be possible for these instructions so we'll never trigger the xor dependency break.

Differential Revision: https://reviews.llvm.org/D79032

These are used in SReg_32 and when we start to use SGPR_LO16
there will be compaints that not all registers in RC support
all subreg indexes. For now it is NFC.

Unused regunits are reserved so that verifier does not complain
about missing phys reg live-ins.

Differential Revision: https://reviews.llvm.org/D78591

Generalize the 16-bit FPR to 32-bit GPR logic to work for all cases where
destination size is bigger than source size.

Also fixed CheckCopy() always returning true instead of the result of
isValidCopy().

Differential Revision: https://reviews.llvm.org/D77530

Patch by tambre (Raul Tambre)

Reviewers: gchatelet, echristo

Subscribers: mgorny, tschuett, libc-commits

Tags: #libc-project

Differential Revision: https://reviews.llvm.org/D79040

Summary:
This patch adds a function that is similar to `llvm::sys::path::home_directory`, but provides access to the system cache directory.

For Windows, that is %LOCALAPPDATA%, and applications should put their files under %LOCALAPPDATA%\Organization\Product\.

For *nixes, it adheres to the XDG Base Directory Specification, so it first looks at the XDG_CACHE_HOME environment variable and falls back to ~/.cache/.

Subsequently, the Clangd Index storage leverages this new API to put index files somewhere else than the users home directory.

Fixes https://github.com/clangd/clangd/issues/341

Reviewers: sammccall, chandlerc, Bigcheese

Reviewed By: sammccall

Subscribers: hiraditya, ilya-biryukov, MaskRay, jkorous, dexonsmith, arphaman, kadircet, ormris, usaxena95, cfe-commits, llvm-commits

Tags: #clang-tools-extra, #clang, #llvm

Differential Revision: https://reviews.llvm.org/D78501