off_t apparently is just "long" on Win64, which is 32-bits, and
therefore not long enough to compare with UINT32_MAX. Use auto to follow
the surrounding code. uint64_t would also be fine.

This reverts commit d8a4ef0e.

This commit broke some of the bots. I believe it's due to nondeterminism. Will fix and recommit.

This patch adds MXCSR as a reserved physical register and models its use
by X86 SSE instructions. It also adds flag "mayRaiseFPException" for the
instructions that possibly can raise FP exception according to the
architecture definition.

Following what SystemZ and other targets does, only the current rounding
modes and the IEEE exception masks are modeled. *Changes* of the MXCSR
due to exceptions are not modeled.

Patch by Pengfei Wang

Differential Revision: https://reviews.llvm.org/D68121

When throwing objects with deleted copy constructors, the copy ctor
field of the catchable type should remain null and the mangle name
changes. This already worked in simple cases, but in cases involving
non-trivial subobjects, sometimes LookupCopyingConstructor could return
a non-null but deleted constructor decl. Skip those and don't reference
them.

Fixes PR43680

readlane and writelane instructions are not allowed to use m0 as the
data operand, so spilling them is tricky and would require an
intermediate SGPR to spill it. Constrain the virtual register class in
this caes to disallow the inline spiller from folding the m0 operand
directly into the spill instruction.

I copied this hack from AArch64 which has the same problem for $sp.

In lieu of converting that tutorial to text, add a link to the porting
tutorial from the 2017 Dev Meeting to the porting page

This adds experimental support for extracting a Clang module dependency graph
from a compilation database. The output format is experimental and will change.
It is currently a concatenation of JSON outputs for each compilation. Future
patches will change this to deduplicate modules between compilations.

Differential Revision: https://reviews.llvm.org/D69420

[X86] Rewrite hasReassociableOperands and setSpecialOperandAttr to not hardcode number of operands or position of the EFLAGS operand.

This makes the code immune to the MXCSR addition in D68121.

The legalizer page was in a fairly good state. I've mostly just inlined
some information as a note and removed a reference to potential future
work that I think is very unlikely to be done (it's very hard to tell if
a pattern or set of patterns fully covers a node due to C++ predicates).

Also added a note that 'selectable' doesn't mean that InstructionSelect
must do it.

non-constant.

We previously failed the entire condition evaluation if an unmodeled
side-effect was encountered in an argument, even if that argument was
unused in the attribute's condition.

These tests were written before llvm-jitlink supported regression testing of
relocation support. They are now redundant.

This should fix the failures on some bots due to commit
b9d8e23b.

LinkGraph::splitBlock will split a block at a given index, returning a new
block covering the range [ 0, index ) and modifying the original block to
cover the range [ index, original-block-size ). Block addresses, content,
edges and symbols will be updated as necessary. This utility will be used
in upcoming improvements to JITLink's eh-frame support.

When building standalone, `LLVM_DEFAULT_TARGET_TRIPLE` may be undefined.
Matching against an empty string does not work as desired in CMake, so,
fallback to the old behaviour, defaulting `LLDB_DEBUGSERVER_ARCH` to
`CMAKE_OSX_ARCHITECTURES`.

The scheduling definitions for ASIMD transpose and zipping overlapped with
others a few lines below.  Somehow, they didn't raise errors before.

There seem to be other overlapping definitions.  Somehow, they still don't
raise errors.

Differential revision: https://reviews.llvm.org/D68353

This reverts commit 11c2a85d.

Adds support for generating the XCOFF data section in object files for global variables with initialization.

Merged aix-xcoff-common.ll into aix-xcoff-data.ll.

Changed variable name charr to chrarray in the test case to test if readobj works with 8-character names.

Authored by: xingxue

Reviewers: hubert.reinterptrtcast, sfertile, jasonliu, daltenty, Xiangling_L.

Reviewed by: hubert.reinterpretcast, sfertile, daltenty.

Subscribers: DiggerLin, Wuzish, nemanjai, hiraditya, MaskRay, jsji, shchenz, llvm-commits

Tags: #llvm

Differential Revision: https://reviews.llvm.org/D67125

From SelectionDAGs point of view, debug variable locations specified with
dbg.declare and dbg.addr are indirect -- they specify the address of
something. But calling conventions might mean that a Value is placed on
the stack somewhere, and this too is indirection. Previously this was
mixed up in the "IsIndirect" field of DBG_VALUE insts; this patch
separates them by encoding the indirection in a DIExpression.

If we have a dbg.declare or dbg.addr, then the expression produces an
address that then becomes a DWARF memory location. We can represent
this by putting a DW_OP_deref on the _end_ of the expression. If a Value
has been placed on the stack, then we need to put a DW_OP_deref on the
_start_ of the expression, to load the Value from the stack and have
the rest of the expression operate on it.

Differential Revision: https://reviews.llvm.org/D69028

Summary:
Delete the BasicBlockPass and BasicBlockManager, all its dependencies and update documentation.
The BasicBlockManager was improperly tested and found to be potentially broken, and was deprecated as of rL373254.

In light of the switch to the new pass manager coming before the next release, this patch is a first cleanup of the LegacyPassManager.

Reviewers: chandlerc, echristo

Subscribers: mehdi_amini, sanjoy.google, llvm-commits

Tags: #llvm

Differential Revision: https://reviews.llvm.org/D69121

[X86] Add FIXME comment to merge more of computeZeroableShuffleElements and getTargetShuffleAndZeroables

Summary:
The flag allows the user to specify a maximum allocation size that the
sanitizers will honor.  Any larger allocations will return nullptr or
crash depending on allocator_may_return_null.

Reviewers: kcc, eugenis

Reviewed By: kcc, eugenis

Subscribers: #sanitizers, llvm-commits

Tags: #sanitizers, #llvm

Differential Revision: https://reviews.llvm.org/D69576

Do not provide a fix-it when clang-tidy encounters a name that would become
a keyword.