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Rollup merge of #139177 - fneddy:fix_s390x_codegen_bswap, r=Mark-Simulacrum

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Use -C target-cpu=z13 on s390x vector test

currently we see a regression in the `dont-shuffle-bswaps.rs` on s390x. This is due to, the default s390x cpu is set to z10 [here](https://github.com/rust-lang/rust/blob/master/compiler/rustc_target/src/spec/targets/s390x_unknown_linux_gnu.rs#L9) which does not have vector instructions implemented. To make the test pass we need to create an extra test revision and set target-cpu at least to `z13`.
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Chris Denton 2025-04-13 11:48:16 +00:00 committed by GitHub
commit f1b31ae8df
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tests/codegen/dont-shuffle-bswaps.rs
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@ -1,8 +1,11 @@
//@ revisions: OPT2 OPT3
//@ revisions: OPT2 OPT3 OPT3_S390X
//@[OPT2] compile-flags: -Copt-level=2
//@[OPT3] compile-flags: -C opt-level=3
// some targets don't do the opt we are looking for
//@[OPT3] only-64bit
//@[OPT3] ignore-s390x
//@[OPT3_S390X] compile-flags: -C opt-level=3 -C target-cpu=z13
//@[OPT3_S390X] only-s390x
#![crate_type = "lib"]
#![no_std]
@ -17,6 +20,10 @@
// OPT3-NEXT: call <8 x i16> @llvm.bswap
// OPT3-NEXT: store <8 x i16>
// OPT3-NEXT: ret void
// OPT3_S390X: load <8 x i16>
// OPT3_S390X-NEXT: call <8 x i16> @llvm.bswap
// OPT3_S390X-NEXT: store <8 x i16>
// OPT3_S390X-NEXT: ret void
#[no_mangle]
pub fn convert(value: [u16; 8]) -> [u8; 16] {
#[cfg(target_endian = "little")]