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Sync from rust 2025/03/27#645

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Commits on Jan 7, 2025

• Update tests.

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Commits on Jan 15, 2025

• Use a C-safe return type for `__rust_[ui]128_*` overflowing intrinsics

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• Rollup merge of #132397 - m-ou-se:warn-missing-abi, r=Nadrieril

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• Rollup merge of #134338 - tgross35:overflowing-c-safe-ret, r=bjorn3,antoyo

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Commits on Jan 19, 2025

• When LLVM's location discriminator value limit is exceeded, emit locations with dummy spans instead of dropping them entirely

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Commits on Jan 21, 2025

• Treat undef bytes as equal to any other byte

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• remove support for the #[start] attribute

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• Auto merge of #134299 - RalfJung:remove-start, r=compiler-errors

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Commits on Jan 24, 2025

• Make CodegenCx and Builder generic

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• Merge commit '9f33f846ddc06afd7ffd839ee4f18babac3f3204'

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• Rollup merge of #135581 - EnzymeAD:refactor-codgencx, r=oli-obk

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Commits on Jan 27, 2025

• Stabilize `const_black_box`

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• Auto merge of #136024 - GuillaumeGomez:cg_gcc-subtree, r=GuillaumeGomez

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Commits on Jan 28, 2025

• ABI-required target features: warn when they are missing in base CPU (rather than silently enabling them)

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Commits on Jan 30, 2025

• Do not treat vtable supertraits as distinct when bound with different bound vars

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• Use ExistentialTraitRef throughout codegen

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Commits on Jan 31, 2025

• Rollup merge of #135414 - tgross35:stabilize-const_black_box, r=dtolnay

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• Auto merge of #136331 - jhpratt:rollup-curo1f4, r=jhpratt

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Commits on Feb 3, 2025

• tree-wide: parallel: Fully removed all `Lrc`, replaced with `Arc`

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Commits on Feb 4, 2025

• intrinsics: unify rint, roundeven, nearbyint in a single round_ties_even intrinsic

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Commits on Feb 5, 2025

• cg_gcc: Directly use rustc_abi instead of reexports

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Commits on Feb 6, 2025

• Auto merge of #136471 - safinaskar:parallel, r=SparrowLii

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Commits on Feb 7, 2025

• Remove Linkage::Private

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• Remove Linkage::Appending

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• compiler: remove reexports from rustc_target::callconv

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Commits on Feb 8, 2025

• Rustfmt

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Commits on Feb 9, 2025

• Rollup merge of #136706 - workingjubilee:finish-up-rustc-abi-updates, r=compiler-errors

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• Auto merge of #136751 - bjorn3:update_rustfmt, r=Mark-Simulacrum

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Commits on Feb 10, 2025

• cg_gcc: stop caring about compiling for unknown targets

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Commits on Feb 11, 2025

• compiler/rustc_codegen_gcc/src/back/lto.rs: delete "unsafe impl Sync/Send"

  safinaskar

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Commits on Feb 13, 2025

• Implement and use BikeshedGuaranteedNoDrop for union/unsafe field validity

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• Rollup merge of #136858 - safinaskar:parallel-cleanup-2025-02-11-07-54, r=SparrowLii

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• Make `-O` mean `-C opt-level=3`

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Commits on Feb 14, 2025

• Set both `nuw` and `nsw` in slice size calculation

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• Auto merge of #136575 - scottmcm:nsuw-math, r=nikic

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Commits on Feb 19, 2025

• Emit `trunc nuw` for unchecked shifts and `to_immediate_scalar`

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• Rework `OperandRef::extract_field` to stop calling `to_immediate_scalar` on things which are already immediates

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Commits on Feb 20, 2025

• Remove `BackendRepr::Uninhabited`, replaced with an `uninhabited: bool` field in `LayoutData`.

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Commits on Feb 23, 2025

• Add `new_regular` and `new_allocator` to `ModuleCodegen`

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• Save pre-link bitcode to `ModuleCodegen`

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• Rollup merge of #136543 - RalfJung:round-ties-even, r=tgross35

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Commits on Feb 24, 2025

• remove support for rustc_intrinsic_must_be_overridden from the compiler

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• Remove an unnecessary lifetime

  oli-obk

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• Generalize BaseTypeCodegenMethods

  oli-obk

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• Remove an unused lifetime param

  oli-obk

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Commits on Feb 25, 2025

• remove `simd_fpow` and `simd_fpowi`

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• Rollup merge of #137595 - folkertdev:remove-simd-pow-powi, r=RalfJung

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Commits on Feb 27, 2025

• Stop using `hash_raw_entry` in `CodegenCx::const_str`

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Commits on Feb 28, 2025

• rename BackendRepr::Vector → SimdVector

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Commits on Mar 1, 2025

• Auto merge of #133250 - DianQK:embed-bitcode-pgo, r=nikic

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• Rollup merge of #137804 - RalfJung:backend-repr-simd-vector, r=workingjubilee

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Commits on Mar 2, 2025

• Revert "Auto merge of #135335 - oli-obk:push-zxwssomxxtnq, r=saethlin"

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Commits on Mar 3, 2025

• Rollup merge of #137741 - cuviper:const_str-raw_entry, r=Mark-Simulacrum

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• Rollup merge of #137894 - compiler-errors:no-scalar-pair-opt, r=oli-obk

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Commits on Mar 4, 2025

• Auto merge of #137959 - matthiaskrgr:rollup-62vjvwr, r=matthiaskrgr

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• Simplify `implied_target_features`.

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• Change signature of `target_features_cfg`.

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Commits on Mar 7, 2025

• Rollup merge of #137549 - oli-obk:llvm-ffi, r=davidtwco

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• compiler: Use size_of from the prelude instead of imported

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Commits on Mar 9, 2025

• Rollup merge of #138040 - thaliaarchi:use-prelude-size-of.compiler, r=compiler-errors

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Commits on Mar 11, 2025

• Auto merge of #137586 - nnethercote:SetImpliedBits, r=bjorn3

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Commits on Mar 12, 2025

• intrinsics: remove unnecessary leading underscore from argument names

  RalfJung

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Commits on Mar 17, 2025

• Remove implicit #[no_mangle] for #[rustc_std_internal_symbol]

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Commits on Mar 27, 2025

• Merge branch 'master' into sync_from_rust_2025_03_27

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• Update to nightly-2025-03-27

  antoyo

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• Fix patches

  antoyo

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• Fix compilation

  antoyo

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• Implement copysignf128

  antoyo

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• Remove most of builtins hack since it's not necessary anymore

  antoyo

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• Update other patches

  antoyo

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• Fix libcore tests

  antoyo

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• Fix clippy warnings

  antoyo

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• Update GCC version

  antoyo

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• Fix tests

  antoyo

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• Fix int_to_float_cast for f128

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