rust/compiler/rustc_target at 12c102ec5366a0df3c05b2b829d1ca08f46435b6 - bjoernager/rust

Matthias Krüger 12c102ec53 Rollup merge of #119431 - taiki-e:asm-s390x-reg-addr, r=Amanieu Support reg_addr register class in s390x inline assembly In s390x, `r0` cannot be used as an address register (it is evaluated as zero in an address context). Therefore, currently, in assemblies involving memory accesses, `r0` must be [marked as clobbered](`1a1155653a/src/arch/s390x.rs (L58)`) or [explicitly used to a non-address](`1a1155653a/src/arch/s390x.rs (L135)`) or explicitly use an address register to prevent `r0` from being allocated to a register for the address. This patch adds a register class for allocating general-purpose registers, except `r0`, to make it easier to use address registers. (powerpc already has a register class (reg_nonzero) for a similar purpose.) This is identical to the `a` constraint in LLVM and GCC: https://llvm.org/docs/LangRef.html#supported-constraint-code-list > a: A 32, 64, or 128-bit integer address register (excludes R0, which in an address context evaluates as zero). https://gcc.gnu.org/onlinedocs/gcc/Machine-Constraints.html > a > Address register (general purpose register except r0) cc ``@uweigand`` r? ``@Amanieu``		2024-01-04 15:33:59 +01:00
..
src	Rollup merge of #119431 - taiki-e:asm-s390x-reg-addr, r=Amanieu	2024-01-04 15:33:59 +01:00
Cargo.toml	Update to bitflags 2 in the compiler	2023-12-30 18:17:28 +01:00
README.md	Fix outdated crate names in compiler docs	2021-04-08 11:12:14 -05:00

rustc_target contains some very low-level details that are specific to different compilation targets and so forth.

For more information about how rustc works, see the rustc dev guide.