MC: Sink FKF_IsAlignedDownTo32Bits to needed targets
Utilize the generalized MCAsmBackend::evaluateFixup hook. This reduces
overhead for other targets (e.g., x86).
Now MCAsmBackend::getFixupKindInfo is only used by MCAsmStreamer
-show-encoding in the generic code.
AArch64AsmBackend: Remove redundant PCRelFlagVal
This flag, copied from Thumb, is not needed. adjustFixupValue reports
"fixup not sufficiently aligned" when the fixup value is misaligned.
[clang][bytecode] Fix comparing pointers pointing to base classes (#146285)
In the attached test case, one pointer points to the `Derived` class and
one to `Base`, but they should compare equal. They didn't because those
two bases are saved at different offsets in the block. Use
`computeOffsetForComparison` not just for unions and fix it to work in
the more general cases.
[mlir] Remove unused includes (NFC) (#147158)
These are identified by misc-include-cleaner. I've filtered out those
that break builds. Also, I'm staying away from llvm-config.h,
config.h, and Compiler.h, which likely cause platform- or
compiler-specific build failures.
[AArch64][GlobalISel] Fix lowering of i64->f32 itofp. (#132703)
This is a GISel equivalent of #130665, preventing a double-rounding
issue in sitofp/uitofp by scalarizing i64->f32 converts. Most of the
changes are made in the ActionDefinitionsBuilder for G_SITOFP/G_UITOFP.
Because it is legal to convert i64->f16 itofp without double-rounding,
but not a fpround f64->f16, that variant is lowered to build the two
extends.
[libc++][NFC] Merge add_{r,l}value_reference.h (#147022)
The implementation is now quite simple, so it doesn't make a ton of
sense to have these in separate headers.
[libc++] default some special members in map and set (#147081)
We don't actually do anything special in these special member functions,
so we can just `= default` them to save a bit of code.
[libc++] Add the thread safety annotations unconditionally (#117497)
For these annotations to do anything you need `-Wthread-safety`, in
which case users most likely enable them anyways. This avoids that users
have to explictly define a macro just to use the feature they already
had to opt-in to.
[MachineLICM] Let targets decide if copy instructions are cheap (#146599)
When checking whether it is profitable to hoist an instruction, the pass
may override a target's ruling because it assumes that all COPY
instructions are cheap, and that may not be the case for all
micro-architectures (especially for when copying between different
register classes).
On AArch64 there's 0% difference in performance in LLVM's test-suite
with this change. Additionally, very few tests were affected which shows
how it is not so useful to keep it.
x86 performance is slightly better (but maybe that's just noise) for an
A/B comparison consisting of five iterations on LLVM's test suite (Ryzen
5950X on Ubuntu):
```
$ ./utils/compare.py build-a/results* vs build-b/results* --lhs-name base --rhs-name patch --absolute-diff
Tests: 3341
Metric: exec_time
[28 lines not shown]
[AArch64][PAC] Rework discriminator analysis for calls and tail calls
Make use of fixupBlendComponents for AUTH_TCRETURN[_BTI] and for
BLRA[_RVMARKER] pseudos the same way it is done for AUT/PAC/AUTPAC.
This patch unifies discriminator analysis for DAGISel and GlobalISel
and improves cross-BB analysis in case of DAGISel.
MC: Generalize evaluateTargetFixup
Generalize evaluateTargetFixup to be called by all targets,
making FKF_IsTarget unneeded.
Next: Update targets that use FKF_IsAlignedDownTo32Bits to define
`evaluateFixup` and remove FKF_IsAlignedDownTo32Bits from the generic
code.
