[X86] lowerShuffleAsDecomposedShuffleMerge - prefer BLEND(X,SHUFFLE(Y)) over UNPCKL(SHUFFLE(X), SHUFFLE(Y)) (#208503)
If blends are cheap and at least one input is a noop - perform a
permute+blend
remove ParserConversionAction, add paramter to ParseStringLiteralExpression instead, add conversion to SystemCharset then back to UTF8 to handle escape sequences in system encoding
[VPlan] Fold Plan variable in single user in verifyLastActivLane (NFC) (#208505)
In release builds, the variable is now unused. Sink and inline into
single user to silence warning.
[libc] Remove CUDA Toolkit dependency for NVPTX build (#208497)
This was problematic because these CMake headers were never intended to
be used from a GPU target. We had to hack around this to suppress
threads, but all this is used for is getting the default CUDA path, so
just do this directly.
[SLP] Support FAdd/FSub as interchangeable instructions
fadd(x, c) and fsub(x, c) are interchangeable via fadd(x, -c), so treat
them like the existing Add/Sub/Mul/Shl/AShr/And/Or/Xor interchange in
BinOpSameOpcodeHelper. This lets a mixed fadd/fsub bundle vectorize as
a single op instead of needing an alt-shuffle/split node.
Restrict the interchange to a constant RHS. A constant LHS (e.g.
"0.0 - x") cannot be moved to the other opcode without also swapping
the variable operand, which would misalign it against lanes that keep
their native opcode and produce a node too expensive to vectorize.
Reviewers: hiraditya, bababuck, RKSimon
Pull Request: https://github.com/llvm/llvm-project/pull/208002
[AMDGPU][test] Split slow lit tests for better parallel lit throughput (NFC)
Split the slowest AMDGPU CodeGen tests into independent lit units so
llvm-lit can distribute work across available host cores.
[libc++] Remove benchmark::DoNotOptimize from custom predicates in benchmarks (#208412)
The point of the custom predicates is to defeat any detection of special
predicates within the library. There isn't much point in adding
`benchmark::DoNotOptimize` on top of that. It can actually hurt, since
it may hide performance changes due to how much/which information we
provide to the compiler.
[flang][MIF] Fix COSHAPE and THIS_IMAGE(coarray) type mismatch for non-i64 kinds (#208429)
Both COSHAPE and THIS_IMAGE(coarray [,team]) return integer arrays whose
element type is determined by the Fortran KIND argument (default: i32).
The lowering code was ignoring resultType in both cases and hardcoding
i64, which caused downstream type mismatches:
- COSHAPE: SimplifyHLFIRIntrinsics assertion in PRODUCT(COSHAPE(y)) when
the product input type (i64) did not match the declared result type
(i32).
- THIS_IMAGE(coarray): MLIR verifier error on arith.cmpi with mismatched
operand types (i64 vs i32) in comparisons like THIS_IMAGE(a) /=
[5,0,-7].
Fix: derive eleTy from resultType in both genCoshape and genThisImage
and propagate it into the mif.* op's result type. In MIFOpConversion,
extract a shared convertI64SeqToEleTy helper that post-converts the i64
scratch buffer written by the PRIF runtime into the
declared-element-type buffer when the two types differ. Both
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Revert "[LLVM][NFC] Remove some global constructors" (#208494)
Breaks some buildbots with gcc. Looks like constexpr member definitions
need an extern for old gcc otherwise they get local linkage...
Reverts llvm/llvm-project#208407
[WebAssembly] Don't use passive segments for bss in coop threads (#208284)
This commit is an update to `wasm-ld`'s behavior with bss data segments
with `--cooperative-threading`. Previously bss segments were forced to
become passive data segments meaning that a `start` function was emitted
with a `memory.fill` that set the required region of memory to 0. This
isn't required for coop threads though because the module is only
instantiated once and the default pattern for memory is 0, so only
special treatment of TLS segments are required.
[libc++] Fix assign_range test for forward_list (#208283)
That test was checking prepend_range instead of assign_range due to a
copy-paste error.
Fixes #74536
[libc++][NFC] Rename forward_list constructor tests (#208301)
The forward_list tests historically used "range" to mean an iterator
pair, but we use `iter_iter` pretty consistently elsewhere in the test
suite. Using `range` also makes it confusing with the actual tests for
`_range` operations, like `append_range` or `assign_range`.
[VectorCombine] Handle widening/narrowing bitcasts in foldShuffleToIdentity (#187870)
Track lane indices through vector bitcasts that change element count in
foldShuffleToIdentity. Widening bitcasts (e.g. <2 x i32> -> <4 x i16>)
compress R consecutive destination lanes into one source lane, while
narrowing bitcasts (e.g. <4 x i16> -> <2 x i32>) expand each destination
lane into R source lanes.
Also fix identity check, splat mask, and destination type construction
to use Item.size() instead of Ty->getNumElements(), since the Item
vector changes size when passing through element-count-changing
bitcasts.
Fixes #96884
[lldb][Windows][CI] split steps (#206946)
Split the lldb green-dragon lldb testing steps into 2:
1. Build and run the tests without `lldb-server.exe`
2. Run the tests with `lldb-server.exe`
This gives better separation in the UI and if the first step fails, the
second step will still attempt to run.
