Add LLVM 18 compat patches
This commit is contained in:
Nikita Popov
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504e9e1d44
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From 8eb48b4f4c6e3d48f2600159a75184ec4d74b249 Mon Sep 17 00:00:00 2001
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From: Nikita Popov <npopov@redhat.com>
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Date: Wed, 31 Jan 2024 15:08:08 +0100
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Subject: [PATCH] Update data layouts in custom target tests for LLVM 18
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Fixes https://github.com/rust-lang/rust/issues/120492.
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---
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tests/run-make/rust-lld-custom-target/custom-target.json | 2 +-
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tests/run-make/rustdoc-target-spec-json-path/target.json | 2 +-
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tests/run-make/target-specs/my-awesome-platform.json | 2 +-
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.../target-specs/my-x86_64-unknown-linux-gnu-platform.json | 2 +-
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4 files changed, 4 insertions(+), 4 deletions(-)
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diff --git a/tests/run-make/rust-lld-custom-target/custom-target.json b/tests/run-make/rust-lld-custom-target/custom-target.json
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index 7828a99f235c1..e2c64cbdb43c2 100644
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--- a/tests/run-make/rust-lld-custom-target/custom-target.json
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+++ b/tests/run-make/rust-lld-custom-target/custom-target.json
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@@ -2,7 +2,7 @@
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"arch": "x86_64",
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"cpu": "x86-64",
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"crt-static-respected": true,
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- "data-layout": "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128",
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+ "data-layout": "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-i128:128-f80:128-n8:16:32:64-S128",
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"dynamic-linking": true,
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"env": "gnu",
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"has-rpath": true,
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diff --git a/tests/run-make/rustdoc-target-spec-json-path/target.json b/tests/run-make/rustdoc-target-spec-json-path/target.json
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index 34357182c205e..c478f1196fae0 100644
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--- a/tests/run-make/rustdoc-target-spec-json-path/target.json
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+++ b/tests/run-make/rustdoc-target-spec-json-path/target.json
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@@ -2,7 +2,7 @@
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"arch": "x86_64",
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"cpu": "x86-64",
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"crt-static-respected": true,
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- "data-layout": "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128",
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+ "data-layout": "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-i128:128-f80:128-n8:16:32:64-S128",
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"dynamic-linking": true,
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"env": "gnu",
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"executables": true,
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diff --git a/tests/run-make/target-specs/my-awesome-platform.json b/tests/run-make/target-specs/my-awesome-platform.json
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index 00de3de05f07a..1673ef7bd54d1 100644
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--- a/tests/run-make/target-specs/my-awesome-platform.json
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+++ b/tests/run-make/target-specs/my-awesome-platform.json
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@@ -1,5 +1,5 @@
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{
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- "data-layout": "e-m:e-p:32:32-p270:32:32-p271:32:32-p272:64:64-f64:32:64-f80:32-n8:16:32-S128",
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+ "data-layout": "e-m:e-p:32:32-p270:32:32-p271:32:32-p272:64:64-i128:128-f64:32:64-f80:32-n8:16:32-S128",
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"linker-flavor": "gcc",
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"llvm-target": "i686-unknown-linux-gnu",
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"target-endian": "little",
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diff --git a/tests/run-make/target-specs/my-x86_64-unknown-linux-gnu-platform.json b/tests/run-make/target-specs/my-x86_64-unknown-linux-gnu-platform.json
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index 6d5e964ed4fee..0cafce15a9fef 100644
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--- a/tests/run-make/target-specs/my-x86_64-unknown-linux-gnu-platform.json
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+++ b/tests/run-make/target-specs/my-x86_64-unknown-linux-gnu-platform.json
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@@ -1,6 +1,6 @@
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{
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"pre-link-args": {"gcc": ["-m64"]},
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- "data-layout": "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128",
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+ "data-layout": "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-i128:128-f80:128-n8:16:32:64-S128",
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"linker-flavor": "gcc",
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"llvm-target": "x86_64-unknown-linux-gnu",
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"target-endian": "little",
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@ -0,0 +1,55 @@
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From 369fff6c0640fe89be9b915adaa83e66a022e00d Mon Sep 17 00:00:00 2001
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From: Nikita Popov <npopov@redhat.com>
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Date: Wed, 14 Feb 2024 16:26:20 +0100
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Subject: [PATCH] Implicitly enable evex512 if avx512 is enabled
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LLVM 18 requires the evex512 feature to allow use of zmm registers.
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LLVM automatically sets it when using a generic CPU, but not when
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`-C target-cpu` is specified. This will result either in backend
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legalization crashes, or code unexpectedly using ymm instead of
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zmm registers.
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For now, make sure that `avx512*` features imply `evex512`. Long
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term we'll probably have to deal with the AVX10 mess somehow.
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---
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compiler/rustc_codegen_llvm/src/llvm_util.rs | 4 ++++
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tests/ui/asm/x86_64/evex512-implicit-feature.rs | 15 +++++++++++++++
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2 files changed, 19 insertions(+)
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create mode 100644 tests/ui/asm/x86_64/evex512-implicit-feature.rs
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diff --git a/compiler/rustc_codegen_llvm/src/llvm_util.rs b/compiler/rustc_codegen_llvm/src/llvm_util.rs
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index e48479c8da279..54e8ed85e3250 100644
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--- a/compiler/rustc_codegen_llvm/src/llvm_util.rs
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+++ b/compiler/rustc_codegen_llvm/src/llvm_util.rs
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@@ -266,6 +266,10 @@ pub fn to_llvm_features<'a>(sess: &Session, s: &'a str) -> LLVMFeature<'a> {
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("riscv32" | "riscv64", "fast-unaligned-access") if get_version().0 <= 17 => {
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LLVMFeature::new("unaligned-scalar-mem")
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}
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+ // For LLVM 18, enable the evex512 target feature if a avx512 target feature is enabled.
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+ ("x86", s) if get_version().0 >= 18 && s.starts_with("avx512") => {
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+ LLVMFeature::with_dependency(s, TargetFeatureFoldStrength::EnableOnly("evex512"))
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+ }
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(_, s) => LLVMFeature::new(s),
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}
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}
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diff --git a/tests/ui/asm/x86_64/evex512-implicit-feature.rs b/tests/ui/asm/x86_64/evex512-implicit-feature.rs
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new file mode 100644
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index 0000000000000..a15060857eccb
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--- /dev/null
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+++ b/tests/ui/asm/x86_64/evex512-implicit-feature.rs
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@@ -0,0 +1,15 @@
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+// build-pass
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+// only-x86_64
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+// compile-flags: --crate-type=lib -C target-cpu=skylake
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+
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+#![feature(avx512_target_feature)]
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+#![feature(stdarch_x86_avx512)]
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+
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+use std::arch::x86_64::*;
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+
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+#[target_feature(enable = "avx512f")]
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+#[no_mangle]
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+pub unsafe fn test(res: *mut f64, p: *const f64) {
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+ let arg = _mm512_load_pd(p);
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+ _mm512_store_pd(res, _mm512_fmaddsub_pd(arg, arg, arg));
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+}
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@ -137,6 +137,10 @@ Patch5: 0002-set-an-external-library-path-for-wasm32-wasi.patch
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# We don't want to use the bundled library in libsqlite3-sys
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Patch6: rustc-1.77.0-unbundle-sqlite.patch
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# Backports of fixes for LLVM 18 compatibility
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Patch7: 120529.patch
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Patch8: 121088.patch
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### RHEL-specific patches below ###
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# Simple rpm macros for rust-toolset (as opposed to full rust-packaging)
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@ -591,6 +595,9 @@ rm -rf %{wasi_libc_dir}/dlmalloc/
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%endif
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%patch -P6 -p1
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%patch -P7 -p1
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%patch -P8 -p1
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%if %with disabled_libssh2
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%patch -P100 -p1
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%endif
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