43bf4f1fd3
Fix clobber_abi and disallow SVE-related registers in Arm64EC inline assembly Currently `clobber_abi` in Arm64EC inline assembly is implemented using `InlineAsmClobberAbi::AArch64NoX18`, but broken since it attempts to clobber registers that cannot be used in Arm64EC: https://godbolt.org/z/r3PTrGz5r ``` error: cannot use register `x13`: x13, x14, x23, x24, x28, v16-v31 cannot be used for Arm64EC --> <source>:6:14 | 6 | asm!("", clobber_abi("C"), options(nostack, nomem, preserves_flags)); | ^^^^^^^^^^^^^^^^ error: cannot use register `x14`: x13, x14, x23, x24, x28, v16-v31 cannot be used for Arm64EC --> <source>:6:14 | 6 | asm!("", clobber_abi("C"), options(nostack, nomem, preserves_flags)); | ^^^^^^^^^^^^^^^^ <omitted the same errors for v16-v31> ``` Additionally, this disallows SVE-related registers per https://github.com/rust-lang/rust/pull/131332#issuecomment-2401189142. cc ``@dpaoliello`` r? ``@Amanieu`` ``@rustbot`` label O-windows O-AArch64 +A-inline-assembly |
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| README.md | ||
rustc_target contains some very low-level details that are
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For more information about how rustc works, see the rustc dev guide.