[BOLT,test] Add missing pipe in dwarf5-debug-names-skip-forward-decl.s (#226338)
With cl::Grouping, --check-prefix=POSTCHECK parses as -c -h..., so
llvm-dwarfdump prints --help and exits 0, and the checks never run.
[libc++] Run the PR benchmarking tooling from main (#226278)
Previously, we'd use the workflow file and machines.json from the main
branch, but the rest of the tools (e.g. build-at-commit) would be taken
from the PR head. This patch switches to using the tools from main and
only using the PR head's content for the actual code and benchmarks.
This should make it easier to evolve the tools and the workflow files
without breaking PR benchmarking for people who submit PRs from slightly
outdated bases.
[RISCV] Support frame pointers in SiFive CLIC preemptible handlers (#221318)
This commit adds frame-pointer support for SiFive CLIC preemptible
handlers by using t0 to save mcause and mepc to dedicated stack slots in
both cases.
tests: wait for a shell in one block, not two
The previous commit fixed the wrong half. Both tests had a stage that
waited for "login:" and then a stage that handled either a prompt or an
automatic login. I replaced the second -- the one that printed the error I
had seen -- and left the first demanding a prompt.
On an image where automatic login works there is no prompt, so the first
block waited out its full eight minutes and the second never ran. That is
why all four lanes failed on the run against fresh packages, with
FAIL: 'login:' prompt not seen within 8 minutes
rather than the login rejection from before. The packages were the fix for
the earlier failure -- they carry autologin-user, so admin is now logged in
automatically -- and the test could not cope with its own success.
Splitting the wait from the decision was the mistake: an earlier block
could contradict a later one about what boot looks like. One block now does
both, and the panic check folds into it.
[CIR] Update the fastmath contract lowering test
cir-to-llvm now requires a module triple, and the LLVM dialect prints
fastmath flags as fastmath<contract> rather than an attribute dictionary.
Co-authored-by: Cursor <cursoragent at cursor.com>
[AMDGPU][InstCombine] Fold zero dot operands to accumulator
Fold AMDGPU dot intrinsics when either operand is zero.
`dot(a, 0) = 0` and `dot(0, b) = 0`, so replace the intrinsic with its accumulator.
This avoids unrelated clamp and add/sub reassociation cases.
[libc++] Take the benchmark testing configuration from the test suite (#226267)
Previously, we'd use the testing configuration (the .cfg.in file) from
the checked out test suite for the PR benchmarking, but we'd use the one
from `main` for the historical benchmarking. Since the config file is
logically part of the test suite (just like the rest of the Lit setup),
it makes more sense to take it from the checked-out test suite version.
[SelectionDAG][AMDGPU] Fold mul24 with an AND operand whose low bits are zero
Use SimplifyMultipleUseDemandedBits to simplify AND operands based on the
low 24 bits consumed by mul24.
Fold the multiply to zero when the simplified operand is zero.
This folds cases such as:
mul24(x & 0xff000000, y) -> 0
[AMDGPU] Fold 24 bit multiply with zero low bits
Fold `MUL_I24` and `MUL_U24` to zero when either operand has known zero
low 24 bits.
For example:
```
llvm.amdgcn.mul.i24(x, 0x01000000) -> 0
```
[SelectionDAG] Handle constants in SimplifyMultipleUseDemandedBits
Replace a non-zero constant with zero when none of its set bits are
demanded.
This allows users of `SimplifyMultipleUseDemandedBits` to eliminate
irrelevant constant bits while preserving the convention that a null
SDValue indicates no simplification.
[AMDGPU] Fold a constant add/sub into the sudot4/sudot8 accumulator (#225322)
Fold a constant add into the accumulator operand of sudot4 and sudot8
when
clamping is disabled:
```
sudot(a, b, C1, false) + C2 -> sudot(a, b, C1 + C2, false)
```
Subtraction by a constant is canonicalized to addition of its negation.
[HLSL] Add support for dynamic resources (#221103)
Adds support for dynamic resources, also known as bindless or directly
indexed resources. The design is described in
https://github.com/llvm/wg-hlsl/issues/204.
The change adds:
- The `ResourceDescriptorHeap` and `SamplerDescriptorHeap` global
symbols, which expose the Shader Model 6.6 descriptor heaps.
- Internal `hlsl::__detail::heap_resource_info` and
`hlsl::__detail::heap_sampler_info` types, which are produced by
indexing the corresponding descriptor heap. HLSL resource and sampler
types can be implicitly constructed from these values.
- Constructors that accept the corresponding internal heap info type for
all currently implemented resource classes.
- Clang builtins `__builtin_hlsl_resource_handlefromheap` and
`__builtin_hlsl_resource_counterhandlefromheap` for creating resource
and counter handles from descriptor heap indices.
- Sema validation and return-type handling for the new builtins.
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[MIR][AMDGPU] Serialize register allocation anti-hints (#218073)
This PR adds MIR print and parse support for the register allocation
anti-hints through
a per vreg anti-hints: [ .. ] field in the registers: section. The
printer only emits
the anti-hint registers only when the it is non-empty to keep existing
tests unchanged.
## Stack
PR **2/4**. Depends on #218071. Next: Apply Occupancy-Aware allocation
anti-hints #218074.
[AMDGPU] Track allocator-reserved register pressure separately
GCNRegPressure counts a tuple at its live lane count, but the excess and
critical limits the scheduler compares against are expressed in
allocatable registers. A tuple is reserved at its full class width for
its whole live range, so lanes that are dead at a given point are still
unavailable to any other value, and the live lane count underestimates
what the allocator has to set aside.
Track a third set of per-kind values recording the reserved width, and
use it for the pressure the GCN trackers hand to the scheduling
heuristics.
Also add -amdgpu-trackers-compare-rp to print the GCN tracker and the
generic tracker pressure side by side for every candidate, which is what
the discrepancy was found with.
WIP
AI-Assisted
kern: Nix SS_ISABORTING.
This was a vestige of an earlier revision of the .fo_restart
mechanism; it is never set by anything in the kernel, it has been
supplanted by SS_RESTARTSYS, and it serves no further purpose.
t_fdrestart: Test socket connect and accept too.
The logic for connect, it turns out, is missing .fo_restart tests.
PR kern/57659: closing pipe writefd fails to wake concurrent write on
same writefd
t_sigio: Set SA_SIGINFO|SA_RESTART as originally intended.
Lost this in a round of refactoring, and it just kinda worked by
accident, oops!
PR kern/59056: poll POLLHUP bugs
PR kern/60782: SIGIO says socket ready for send before send does
PR kern/60783: tty: missing siginfo_t in SIGIO
PR kern/60784: pty doesn't deliver SIGIO when writable
PR kern/60785: fifo delivers SIGIO with wrong si_fd
[WebKit Checkers] Add alpha.webkit.UnborrowedLambdaCapturesChecker (#226288)
Like alpha.webkit.UnborrowedLocalVarsChecker, but for lambda captures.
This checker is pretty restrictive because, unlike a refcounted object,
a lifetime-dependent pointer/reference/view cannot be captured in an
escaping closure at all. Still, we permit capturing in a NOESCAPE
closure.
[CIR] Record -ffp-contract=fast as a per-op contract flag
Classic CodeGen stamps contract on floating-point instructions so a later
Standard-fusion backend can still form an FMA. CIR only fused within a
statement via cir.fmuladd, which dropped FFMA on the CUDA device default.
Co-authored-by: Cursor <cursoragent at cursor.com>
[clang][DepScan] Disable relocation checks (#225563)
This internally broke an incremental build. Disable while it gets
investigated.
This is partial revert of cf8597bd3b87
resolves: rdar://188026923
[CIR] Record -ffp-contract=fast as a per-op contract flag
Classic CodeGen stamps contract on floating-point instructions so a later
Standard-fusion backend can still form an FMA. CIR only fused within a
statement via cir.fmuladd, which dropped FFMA on the CUDA device default.
Co-authored-by: Cursor <cursoragent at cursor.com>
