472230d192
`[T; N]::zip` is "eager" but most zips are mapped. This causes poor optimization in generated code. This is a fundamental design issue and "zip" is "prime real estate" in terms of function names, so let's free it up again.
32 lines
743 B
Rust
32 lines
743 B
Rust
// compile-flags: -C opt-level=3 -Z merge-functions=disabled
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// only-x86_64
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#![crate_type = "lib"]
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// CHECK-LABEL: @auto_vectorize_direct
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#[no_mangle]
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pub fn auto_vectorize_direct(a: [f32; 4], b: [f32; 4]) -> [f32; 4] {
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// CHECK: load <4 x float>
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// CHECK: load <4 x float>
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// CHECK: fadd <4 x float>
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// CHECK: store <4 x float>
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[
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a[0] + b[0],
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a[1] + b[1],
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a[2] + b[2],
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a[3] + b[3],
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]
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}
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// CHECK-LABEL: @auto_vectorize_loop
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#[no_mangle]
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pub fn auto_vectorize_loop(a: [f32; 4], b: [f32; 4]) -> [f32; 4] {
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// CHECK: load <4 x float>
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// CHECK: load <4 x float>
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// CHECK: fadd <4 x float>
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// CHECK: store <4 x float>
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let mut c = [0.0; 4];
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for i in 0..4 {
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c[i] = a[i] + b[i];
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}
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c
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}
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