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Matthias Krüger 1762f018f7
Rollup merge of #137860 - taiki-e:powerpcspe-msync, r=workingjubilee 
rustc_target: Add msync target feature and enable it on powerpcspe targets

Some older PowerPC processors do not have the `sync` (`sync 0`) and `lwsync` (`sync 1`) instructions, but instead have the `msync` instruction. (IIRC `msync` and `sync` will be assembled into the same bit-pattern, but `lwsync` will be SIGILL. See also https://gcc.gnu.org/legacy-ml/gcc-patches/2006-11/msg01238.html.)

LLVM recognizes this as the [`msync` feature](cc5d8a4b2f/llvm/lib/Target/PowerPC/PPC.td (L140)) and enables for some cpus such as [e500](cc5d8a4b2f/llvm/lib/Target/PowerPC/PPC.td (L644)).

powerpcspe is a target for CPUs such as e500 ([Debian Wiki](https://wiki.debian.org/PowerPCSPEPort)). However, the `msync` feature is currently not enabled except for vxworks, and at least since 2022-04, powerpc-unknown-linux-gnuspe was known to not work on real hardware without `-C target-cpu` (e.g., #96394, #117361).

8c392966a0/compiler/rustc_target/src/spec/targets/powerpc_wrs_vxworks_spe.rs (L28)

Fixes #117361

cc `@BKPepe` ([powerpc-unknown-linux-muslspe target maintainer](https://doc.rust-lang.org/nightly/rustc/platform-support/powerpc-unknown-linux-muslspe.html#target-maintainers))
cc `@glaubitz` (who added powerpc-unknown-linux-gnuspe in https://github.com/rust-lang/rust/pull/48484)
cc `@th0ma7` (who opened #117361)

r? workingjubilee

`@rustbot` label +O-PowerPC +A-target-feature
2025-03-02 22:44:25 +01:00
..
assembly Rollup merge of #137530 - LukasWoodtli:gardena/lw/mips_dwarf, r=jieyouxu 2025-02-24 19:21:48 -05:00
auxiliary tests: use minicore more 2025-02-24 09:26:54 +00:00
codegen Rollup merge of #137818 - durin42:llvm-21-remove-readonly, r=jieyouxu 2025-03-01 16:03:15 +01:00
codegen-units Remove -Zinline-in-all-cgus and clean up CGU partitioning tests 2025-01-27 23:48:47 -05:00
coverage coverage: Add some more cases to tests/coverage/holes.rs 2025-02-19 13:56:20 +11:00
coverage-run-rustdoc
crashes Bless tests 2025-02-26 19:27:19 +00:00
debuginfo Rollup merge of #135354 - Walnut356:msvc_lldb, r=wesleywiser 2025-02-23 02:44:16 -05:00
incremental remove most simd_ intrinsic declaration in tests 2025-02-27 12:22:59 +01:00
mir-opt Rollup merge of #134943 - Shunpoco:116971-mir-opt-issues, r=DianQK 2025-02-28 22:29:48 +08:00
pretty pretty print hir attributes 2025-02-24 14:31:19 +01:00
run-make Auto merge of #133250 - DianQK:embed-bitcode-pgo, r=nikic 2025-03-01 08:22:18 +00:00
rustdoc Move "unused_exter_crate" test from rustdoc-ui to rustdoc 2025-02-27 13:22:46 +00:00
rustdoc-gui Rollup merge of #137539 - GuillaumeGomez:copy-content-tests, r=notriddle 2025-02-25 13:07:34 +01:00
rustdoc-js
rustdoc-js-std Remove the common prelude module 2025-02-11 13:04:27 -08:00
rustdoc-json Fix rustdoc and clippy 2025-02-24 14:31:19 +01:00
rustdoc-ui Move "unused_exter_crate" test from rustdoc-ui to rustdoc 2025-02-27 13:22:46 +00:00
ui Rollup merge of #137860 - taiki-e:powerpcspe-msync, r=workingjubilee 2025-03-02 22:44:25 +01:00
ui-fulldeps Auto merge of #137573 - compiler-errors:rollup-noq9yhp, r=compiler-errors 2025-02-25 02:24:40 +00:00
COMPILER_TESTS.md