[WebAssembly][FastISel] Fold i64 extension chains into widened loads (#187934)
FastISel can already fold some sign- and zero-extending loads, but a
number of i64 extension patterns still leave redundant instructions
behind.
This patch series extends load folding to recognize several such cases,
including:
- promoted sign-extension chains
- copy + i64.extend_i32_{u,s} chains
- AND-based zero-extension chains
- shift-based sign-extension chains
When these patterns originate from narrow integer loads, fold them
directly into widened i64 loads instead of materializing intermediate
i32 loads followed by redundant i64 extends.
Fixes #179672
[ClangScanDeps] Do not emit warning for P1689 format (#186966)
Close https://github.com/llvm/llvm-project/issues/185394
This is only for P1689 format as ClangScanDeps/optimize-vfs-pch.m will
check for warning message. I'll leave this to people who want to change
that.
[RISCV] Disable rounding of aggregate return/arguments to iXLen. (#184736)
If the type is rounded to iXLen, an additional zext instruction is
generated. For example, https://godbolt.org/z/bG7vG4dvM
[TargetLowering][RISCV] Using index type for step vector in expandVectorFindLastActive (#187984)
This patch change the type of the step vector lowered from
`expandVectorFindLastActive` from `e8` to the index type of the target
machine.
This can help the index out of bound issue when the VLEN is large.
Note that after this patch, there are still some issue in
expandVectorFindLastActive.
[clang][dataflow] Fix bugprone-unchecked-optional-access for recent changes to libcxx (#188044)
Fix for https://github.com/llvm/llvm-project/issues/187788
- When checking the receiver with an UncheckedDerivedToBase cast, just
check each component of the chain if we've hit the public optional
class, rather than rely on public vs private/protected inheritance. This
covers the case when the class derives from optional.
- or check if the SubExpr of the cast is already the public optional
type (when not deriving from optional -- since you won't see this first
layer in the cast chain).
See comment about why there is public inheritance to a private base
class at the moment:
https://github.com/llvm/llvm-project/issues/187788#issuecomment-4106543794
The performance doesn't seem much different in several benchmarks.
Perhaps because we first see if the method name matches, which filters a
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[clang-tidy] Fix false positive in cert-ctr56-cpp (PointerArithmeticOnPolymorphicObjectCheck) (#187452)
## Summary
This change adds `unless(isInstantiationDependent())` to the
`ArraySubscript` matcher.
## Motivation
In template code, some array subscript expressions are not fully
resolved yet.
Because of this, the matcher may treat them incorrectly and produce
false positives.
## Change
This patch skips instantiation-dependent expressions in templates.
It helps the matcher work only on resolved expressions.
Closes https://github.com/llvm/llvm-project/issues/187009.
[Object] Normalize BBAddrMap decode address types in ELF (#187962)
This is part of patches to port BBAddrMap to COFF.
DataExtractor::getAddress reads 4 or 8 bytes according to AddressSize and
returns a uint64_t container value. This code path already sets AddressSize
from ELFT::Is64Bits and stores range/function addresses as uint64_t.
Replace temporary uintX_t/unsigned values in this decoder path with uint64_t
and remove the redundant cast from getAddress(). This preserves behavior for
ELF32/ELF64 inputs.
This is a preparatory step for extracting a format-agnostic BBAddrMap decoder.
[llvm][ADT] Refactor PointerUnion to use PunnedPointer. NFC. (#187950)
Replace `PointerIntPair`-based storage with raw `PunnedPointer<void*>`
and explicit tag encoding. The bit layout stay identical. Use constexpr
functions (`minBits`, `tagBits`, `tagShift`) whose bodies are only
instantiated when called, for incomplete-type compatibility
The goal is to prepare `PointerUnion` for future extension to support
variable-length encoding and allow for more variants than with simple
tags, which will require direct bit manipulation not possible with
`PointerIntPair`.
I benchmarked this with https://github.com/llvm/llvm-project/pull/187874
and the performance is identical on my system.
---------
Co-authored-by: Claude Opus 4.6 (1M context) <noreply at anthropic.com>
[compiler-rt] Error only if sanitizer builds are enabled (#187944)
This fix is to error out only if sanitizer builds are enabled as opposed
to forcing flang to use an option or install the development package.
[affine] Support xori/maxnumf/minnumf reduction types. (#184450)
This is a follow-up on #163310, which supported the above reduction
kinds, but did not update affine.parallel verification code.
