Changes

[lld][WebAssembly] Emit all return types of multivalue functions

We previously were incorrectly emitting only the first result type.

Differential Revision: https://reviews.llvm.org/D85783

[Sanitizer] Fix segfaults during unwinding on SystemZ

Every now and then SystemZ programs built with ASan crash with

    ERROR: AddressSanitizer: stack-overflow on address 0x040000000000

for no apparent reason. The problem is that
BufferedStackTrace::UnwindFast() is specialized for SystemZ: it takes
register 14 from the frame, however, IsValidFrame() is not
specialized, and does not guarantee that frame[14] is going to be a
valid memory access.

Fix by introducing per-arch kFrameSize and using it in IsValidFrame().

Reviewed By: uweigand

Differential Revision: https://reviews.llvm.org/D85822

[InstSimplify] Extract abs intrinsic tests into separate file (NFC)

Also move some tests from InstCombine to InstSimplify,
as they are already handled by InstSimplify.

[InstSimplify] Add additional abs intrinsic icmp tests (NFC)

While abs >= 0 already folds, some variations thereon don't.

[ValueTracking] Add abs intrinsics support to computeConstantRange()

Implementation is the same as for SPF_ABS.

Build a flat LLDB.framework for embedded Darwin targets

This patch configures LLDB.framework to build as a flat unversioned
framework on non-macOS Darwin targets, which have never supported the
macOS framework layout.

This patch also renames the 'IOS' cmake variable to 'APPLE_EMBEDDED' to
reflect the fact that lldb is built for several different kinds of embedded
Darwin targets, not just iOS.

Differential Revision: https://reviews.llvm.org/D85770

[libcxx][test] Fix a -Wstring-concatenation warning in fuzzer_test.h

This was causing failures on green dragon:
http://lab.llvm.org:8080/green/job/libc++%20and%20libc++abi%20trunk/780/

[lldb] Fix unit test parsing to handle CR+LF as well as LF

Apparently when the strings are created, the `'\n'` is converted to the
platform's natural new line indicator, which is CR+LF on Windows.  But
upon reading back with `sscanf`, the CRs caused a matching failure.

[MLIR][NFC] Remove tblgen:: prefix in TableGen/*.cpp files

- Add "using namespace mlir::tblgen" in several of the TableGen/*.cpp files and
  eliminate the tblgen::prefix to reduce code clutter.

Differential Revision: https://reviews.llvm.org/D85800

[flang][msvc] Remove default arguments for function specializations.

C++ does not allow function template specializations to have default arguments. IIUC callers will only use the default arguments of the primary template. gcc and clang accept the syntax anyway, but msvc emits an error.

See https://en.cppreference.com/w/cpp/language/template_specialization for more details.

This patch is part of the series to [[ http://lists.llvm.org/pipermail/flang-dev/2020-July/000448.html | make flang compilable with MS Visual Studio ]].

Reviewed By: DavidTruby

Differential Revision: https://reviews.llvm.org/D85657

[NFC][MLIR][OpenMP] Add comments and test for OpenMP enum declaration utility

Reviewed By: mehdi_amini

Differential Revision: https://reviews.llvm.org/D85857

[Coverage] Enable emitting gap area between macros

Differential Revision: https://reviews.llvm.org/D85176

[PowerPC]  Implement Vector Shift Builtins

This patch implements the builtins for the vector shifts (shl, srl, sra), and
adds the appropriate test cases for these builtins. The builtins utilize the
vector shift instructions introduced within ISA 3.1.

Differential Revision: https://reviews.llvm.org/D83338

[lldb] Fix relative imports and set the appropriate include dirs

After moving python.swig and lua.swig into their respective
subdirectories, the relative paths in these files were out of date. This
fixes that and ensures the appropriate include paths are set in the SWIG
invocation.

Differential revision: https://reviews.llvm.org/D85859

PR47143: Don't crash while constant-evaluating value-initialization of
an array of unknown bound as the initializer of an array new expression.

Remove DialectHooks and introduce a Dialect Interfaces instead

These hooks were introduced before the Interfaces mechanism was available.

DialectExtractElementHook is unused and entirely removed. The
DialectConstantFoldHook is used a fallback in the
operation fold() method, and is replaced by a DialectInterface.
The DialectConstantDecodeHook is used for interpreting OpaqueAttribute
and should be revamped, but is replaced with an interface in 1:1 fashion
for now.

Differential Revision: https://reviews.llvm.org/D85595

Merge OpFolderDialectInterface with DialectFoldInterface (NFC)

Reviewed By: rriddle

Differential Revision: https://reviews.llvm.org/D85823

[AMDGPU] Fix crash when dag-combining bitcast

From the code after the 'break', they are processing 64bit scalar and
vector bitcast. So I think the break-condition should be (cond1 || cond2)
This means we only execute following code if (64bit and dest-is-vector).

Also remove a previous fix which is not needed with this new fix.
(introduced in: 1349a04ef5f594dda705ec80474dda4837f26dba)

Reviewed By: arsenm

Differential Revision: https://reviews.llvm.org/D85804

[mlir][Type] Remove the remaining usages of Type::getKind in preparation for its removal

This revision removes all of the lingering usages of Type::getKind. A consequence of this is that FloatType is now split into 4 derived types that represent each of the possible float types(BFloat16Type, Float16Type, Float32Type, and Float64Type). Other than this split, this revision is NFC.

Reviewed By: mehdi_amini

Differential Revision: https://reviews.llvm.org/D85566

[lld-macho] Support dynamic linking of thread-locals

References to symbols in dylibs work very similarly regardless of
whether the symbol is a TLV. The main difference is that we have a
separate `__thread_ptrs` section that acts as the GOT for these
thread-locals.

We can identify thread-locals in dylibs by a flag in their export trie
entries, and we cross-check it with the relocations that refer to them
to ensure that we are not using a GOT relocation to reference a
thread-local (or vice versa).

Reviewed By: #lld-macho, smeenai

Differential Revision: https://reviews.llvm.org/D85081

[lld-macho] Generate ObjC symbols from .tbd files

I followed similar logic in TapiFile.cpp.

Reviewed By: #lld-macho, smeenai

Differential Revision: https://reviews.llvm.org/D85255

[lld-macho] Avoid unnecessary shared_ptr in DylibFile ctor

DylibFile doesn't store a pointer to its InterfaceFile
parameter, so there's no need to use a shared_ptr.

Reviewed By: #lld-macho, compnerd

Differential Revision: https://reviews.llvm.org/D85402

[lld-macho] Add error handling for malformed TBD files

Previously, lld would crash while complaining that `Expected<T>
must be checked before access or destruction`.

Reviewed By: #lld-macho, compnerd

Differential Revision: https://reviews.llvm.org/D85403

[lld-macho] Support larger dylib symbol ordinals in bindings

Do folks care if we don't have a test for this? Creating 16
dylibs to trigger this straightforward code path seems a little tedious

Reviewed By: #lld-macho, smeenai

Differential Revision: https://reviews.llvm.org/D85467

[lld-macho] Implement -force_load

It's similar to lld-ELF's `-whole-archive`, but applied to individual
archives instead of to a series of them.

Reviewed By: #lld-macho, smeenai

Differential Revision: https://reviews.llvm.org/D85550

[lld-macho] Support -rpath

Pretty straightforward; just emits LC_RPATH for dyld to consume.

Note that lld itself does not yet support dylib lookup via @rpath.

Reviewed By: #lld-macho, compnerd

Differential Revision: https://reviews.llvm.org/D85701

[macho2yaml] Remove an unused variable. NFC.

[lld-macho] Try to fix invalid-stub test on Windows

Summary: Path separator issues...

[AMDGPU] Pre-commit test for D85872

[lld-macho] Fix invalid-stub test on Windows, take 2