[Clang][AArch64] Move definitions of FP8 Neon loads & stores (#146352)
Moves the definitions of FP8 loads & stores so that they are guarded
by `ArchGuard = "defined(__aarch64__) || defined(__arm64ec__)"`
[DAG] canCreateUndefOrPoison - explicitly state the AssertSext/Zext/Align/NoFPClass can create poison. NFC. (#146493)
This keeps getting forgotten (e.g. #66603) - so make a point of adding
it here to make it clear instead of relying on the implicit default of
returning true.
[mlir][tblgen] Fix region and successor references in custom directives (#146242)
Previously, references to regions and successors were incorrectly disallowed outside the top-level assembly form. This change enables the use of bound regions and successors as variables in custom directives.
[DAG] visitFREEZE - remove isGuaranteedNotToBeUndefOrPoison assertion (#146490)
Although nice to have to prove the freeze can be moved, this can fail
immediately after freeze(op(...)) -> op(freeze(),freeze(),...) creation
if any of the new freeze nodes now prevents value tracking from seeing
through to the source values (e.g. shift amounts/element indices are in
bounds etc.).
This will allow us to remove the isGuaranteedNotToBeUndefOrPoison checks
inside canCreateUndefOrPoison that were discussed on #146361
[PowerPC] Remove chenzheng1030 from active maintainers (#145519)
chenzheng1030 has left IBM and no longer works on the PowerPC
backend. Move them from active to former maintainers.
[AMDGPU] Add BFX Formation Combines to RegBankCombiner
They're relatively safe to use there I believe. The only new registers
they may create are the constants for the BFX. For those, borrow the
RC from the source register.
Fixes #140040
[mlir][tosa] Require signless types in validation and add corresponding conversion pass (#144367)
Firstly, this commit requires that all types are signless in the strict
mode of the validation pass. This is because signless types on
operations are required by the TOSA specification. The "strict" mode in
the validation pass is the final check for TOSA conformance to the
specification, which can often be used for conversion to other formats.
In addition, a conversion pass `--tosa-convert-integer-type-to-signless`
is provided to allow a user to convert all integer types to signless.
The intention is that this pass can be run before the validation pass.
Following use of this pass, input/output information should be carried
independently by the user.
[Clang] Remove AArch64TargetInfo::setArchFeatures (#146107)
When compiling with `-march=armv9-a+nosve` we found that Clang still
defines the `__ARM_FEATURE_SVE2` macro, which is explicitly set in
`setArchFeatures` when compiling for armv9-a.
After some experimenting, I found out that the list of features passed
into `AArch64TargetInfo::handleTargetFeatures` has already been expanded
and takes into account `+no[feature]` and has already expanded features
like `armv9-a`.
From that I conclude that `setArchFeatures` is no longer required.
[GISel] Combine compare of bitfield extracts or'd together.
Equivalent of the previous DAG patch for GISel.
The shifts are BFXs in GISel, so the canonical form of the entire expression
is different than in the DAG. The mask is not at the root of the expression, it
remains on the leaves instead.
See #136727
