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rust/tests/codegen/simd-intrinsic/simd-intrinsic-transmute-array.rs

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Remove redundant `ignore-tidy-linelength` annotations This is step 2 towards fixing #77548. In the codegen and codegen-units test suites, the `//` comment markers were kept in order not to affect any source locations. This is because these tests cannot be automatically `--bless`ed.
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//
Support repr(simd) on ADTs containing a single array field This PR allows using `#[repr(simd)]` on ADTs containing a single array field: ```rust #[repr(simd)] struct S0([f32; 4]); #[repr(simd)] struct S1<const N: usize>([f32; N]); #[repr(simd)] struct S2<T, const N: usize>([T; N]); ``` This should allow experimenting with portable packed SIMD abstractions on nightly that make use of const generics.
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// compile-flags: -C no-prepopulate-passes
#![crate_type = "lib"]
remove const_generics from codegen tests
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#![allow(non_camel_case_types)]
Allow `transmute`s to produce `OperandValue`s instead of always using `alloca`s LLVM can usually optimize these away, but especially for things like transmutes of newtypes it's silly to generate the `alloc`+`store`+`load` at all when it's actually a nop at LLVM level.
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#![feature(repr_simd, platform_intrinsics)]
#![feature(inline_const)]
Support repr(simd) on ADTs containing a single array field This PR allows using `#[repr(simd)]` on ADTs containing a single array field: ```rust #[repr(simd)] struct S0([f32; 4]); #[repr(simd)] struct S1<const N: usize>([f32; N]); #[repr(simd)] struct S2<T, const N: usize>([T; N]); ``` This should allow experimenting with portable packed SIMD abstractions on nightly that make use of const generics.
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#[repr(simd)]
#[derive(Copy, Clone)]
pub struct S<const N: usize>([f32; N]);
#[repr(simd)]
#[derive(Copy, Clone)]
pub struct T([f32; 4]);
#[repr(simd)]
#[derive(Copy, Clone)]
pub struct U(f32, f32, f32, f32);
Allow `transmute`s to produce `OperandValue`s instead of always using `alloca`s LLVM can usually optimize these away, but especially for things like transmutes of newtypes it's silly to generate the `alloc`+`store`+`load` at all when it's actually a nop at LLVM level.
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// CHECK-LABEL: @array_align(
#[no_mangle]
pub fn array_align() -> usize {
// CHECK: ret [[USIZE:i[0-9]+]] [[ARRAY_ALIGN:[0-9]+]]
const { std::mem::align_of::<f32>() }
}
// CHECK-LABEL: @vector_align(
#[no_mangle]
pub fn vector_align() -> usize {
// CHECK: ret [[USIZE]] [[VECTOR_ALIGN:[0-9]+]]
const { std::mem::align_of::<U>() }
}
Support repr(simd) on ADTs containing a single array field This PR allows using `#[repr(simd)]` on ADTs containing a single array field: ```rust #[repr(simd)] struct S0([f32; 4]); #[repr(simd)] struct S1<const N: usize>([f32; N]); #[repr(simd)] struct S2<T, const N: usize>([T; N]); ``` This should allow experimenting with portable packed SIMD abstractions on nightly that make use of const generics.
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// CHECK-LABEL: @build_array_s
#[no_mangle]
pub fn build_array_s(x: [f32; 4]) -> S<4> {
Allow `transmute`s to produce `OperandValue`s instead of always using `alloca`s LLVM can usually optimize these away, but especially for things like transmutes of newtypes it's silly to generate the `alloc`+`store`+`load` at all when it's actually a nop at LLVM level.
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// CHECK: call void @llvm.memcpy.{{.+}}({{.*}} align [[VECTOR_ALIGN]] {{.*}} align [[ARRAY_ALIGN]] {{.*}}, [[USIZE]] 16, i1 false)
Support repr(simd) on ADTs containing a single array field This PR allows using `#[repr(simd)]` on ADTs containing a single array field: ```rust #[repr(simd)] struct S0([f32; 4]); #[repr(simd)] struct S1<const N: usize>([f32; N]); #[repr(simd)] struct S2<T, const N: usize>([T; N]); ``` This should allow experimenting with portable packed SIMD abstractions on nightly that make use of const generics.
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S::<4>(x)
}
Allow `transmute`s to produce `OperandValue`s instead of always using `alloca`s LLVM can usually optimize these away, but especially for things like transmutes of newtypes it's silly to generate the `alloc`+`store`+`load` at all when it's actually a nop at LLVM level.
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// CHECK-LABEL: @build_array_transmute_s
#[no_mangle]
pub fn build_array_transmute_s(x: [f32; 4]) -> S<4> {
// CHECK: %[[VAL:.+]] = load <4 x float>, {{ptr %x|.+>\* %.+}}, align [[ARRAY_ALIGN]]
// CHECK: store <4 x float> %[[VAL:.+]], {{ptr %0|.+>\* %.+}}, align [[VECTOR_ALIGN]]
unsafe { std::mem::transmute(x) }
}
Support repr(simd) on ADTs containing a single array field This PR allows using `#[repr(simd)]` on ADTs containing a single array field: ```rust #[repr(simd)] struct S0([f32; 4]); #[repr(simd)] struct S1<const N: usize>([f32; N]); #[repr(simd)] struct S2<T, const N: usize>([T; N]); ``` This should allow experimenting with portable packed SIMD abstractions on nightly that make use of const generics.
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// CHECK-LABEL: @build_array_t
#[no_mangle]
pub fn build_array_t(x: [f32; 4]) -> T {
Allow `transmute`s to produce `OperandValue`s instead of always using `alloca`s LLVM can usually optimize these away, but especially for things like transmutes of newtypes it's silly to generate the `alloc`+`store`+`load` at all when it's actually a nop at LLVM level.
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// CHECK: call void @llvm.memcpy.{{.+}}({{.*}} align [[VECTOR_ALIGN]] {{.*}} align [[ARRAY_ALIGN]] {{.*}}, [[USIZE]] 16, i1 false)
Support repr(simd) on ADTs containing a single array field This PR allows using `#[repr(simd)]` on ADTs containing a single array field: ```rust #[repr(simd)] struct S0([f32; 4]); #[repr(simd)] struct S1<const N: usize>([f32; N]); #[repr(simd)] struct S2<T, const N: usize>([T; N]); ``` This should allow experimenting with portable packed SIMD abstractions on nightly that make use of const generics.
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T(x)
}
Allow `transmute`s to produce `OperandValue`s instead of always using `alloca`s LLVM can usually optimize these away, but especially for things like transmutes of newtypes it's silly to generate the `alloc`+`store`+`load` at all when it's actually a nop at LLVM level.
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// CHECK-LABEL: @build_array_transmute_t
#[no_mangle]
pub fn build_array_transmute_t(x: [f32; 4]) -> T {
// CHECK: %[[VAL:.+]] = load <4 x float>, {{ptr %x|.+>\* %.+}}, align [[ARRAY_ALIGN]]
// CHECK: store <4 x float> %[[VAL:.+]], {{ptr %0|.+>\* %.+}}, align [[VECTOR_ALIGN]]
unsafe { std::mem::transmute(x) }
}
Support repr(simd) on ADTs containing a single array field This PR allows using `#[repr(simd)]` on ADTs containing a single array field: ```rust #[repr(simd)] struct S0([f32; 4]); #[repr(simd)] struct S1<const N: usize>([f32; N]); #[repr(simd)] struct S2<T, const N: usize>([T; N]); ``` This should allow experimenting with portable packed SIMD abstractions on nightly that make use of const generics.
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// CHECK-LABEL: @build_array_u
#[no_mangle]
pub fn build_array_u(x: [f32; 4]) -> U {
Allow `transmute`s to produce `OperandValue`s instead of always using `alloca`s LLVM can usually optimize these away, but especially for things like transmutes of newtypes it's silly to generate the `alloc`+`store`+`load` at all when it's actually a nop at LLVM level.
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// CHECK: store float %a, {{.+}}, align [[VECTOR_ALIGN]]
// CHECK: store float %b, {{.+}}, align [[ARRAY_ALIGN]]
// CHECK: store float %c, {{.+}}, align
// CHECK: store float %d, {{.+}}, align [[ARRAY_ALIGN]]
let [a, b, c, d] = x;
U(a, b, c, d)
}
// CHECK-LABEL: @build_array_transmute_u
#[no_mangle]
pub fn build_array_transmute_u(x: [f32; 4]) -> U {
// CHECK: %[[VAL:.+]] = load <4 x float>, {{ptr %x|.+>\* %.+}}, align [[ARRAY_ALIGN]]
// CHECK: store <4 x float> %[[VAL:.+]], {{ptr %0|.+>\* %.+}}, align [[VECTOR_ALIGN]]
Support repr(simd) on ADTs containing a single array field This PR allows using `#[repr(simd)]` on ADTs containing a single array field: ```rust #[repr(simd)] struct S0([f32; 4]); #[repr(simd)] struct S1<const N: usize>([f32; N]); #[repr(simd)] struct S2<T, const N: usize>([T; N]); ``` This should allow experimenting with portable packed SIMD abstractions on nightly that make use of const generics.
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unsafe { std::mem::transmute(x) }
}
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