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46 lines
1.7 KiB
Rust
46 lines
1.7 KiB
Rust
//@ compile-flags: -Zautodiff=Enable -C opt-level=3 -Clto=fat
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//@ no-prefer-dynamic
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//@ needs-enzyme
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// This test is almost identical to the scalar.rs one,
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// but we intentionally add a few more floats.
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// `df` would ret `{ f64, f32, f32 }`, but is lowered as an sret.
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// We therefore use this test to verify some of our sret handling.
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#![feature(autodiff)]
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use std::autodiff::autodiff;
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#[no_mangle]
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#[autodiff(df, Reverse, Active, Active, Active)]
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fn primal(x: f32, y: f32) -> f64 {
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(x * x * y) as f64
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}
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// CHECK:define internal fastcc void @_ZN4sret2df17h93be4316dd8ea006E(ptr dead_on_unwind noalias nocapture noundef nonnull writable writeonly align 8 dereferenceable(16) initializes((0, 16)) %_0, float noundef %x, float noundef %y)
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// CHECK-NEXT:start:
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// CHECK-NEXT: %0 = tail call fastcc { double, float, float } @diffeprimal(float %x, float %y)
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// CHECK-NEXT: %.elt = extractvalue { double, float, float } %0, 0
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// CHECK-NEXT: store double %.elt, ptr %_0, align 8
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// CHECK-NEXT: %_0.repack1 = getelementptr inbounds nuw i8, ptr %_0, i64 8
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// CHECK-NEXT: %.elt2 = extractvalue { double, float, float } %0, 1
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// CHECK-NEXT: store float %.elt2, ptr %_0.repack1, align 8
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// CHECK-NEXT: %_0.repack3 = getelementptr inbounds nuw i8, ptr %_0, i64 12
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// CHECK-NEXT: %.elt4 = extractvalue { double, float, float } %0, 2
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// CHECK-NEXT: store float %.elt4, ptr %_0.repack3, align 4
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// CHECK-NEXT: ret void
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// CHECK-NEXT:}
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fn main() {
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let x = std::hint::black_box(3.0);
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let y = std::hint::black_box(2.5);
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let scalar = std::hint::black_box(1.0);
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let (r1, r2, r3) = df(x, y, scalar);
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// 3*3*1.5 = 22.5
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assert_eq!(r1, 22.5);
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// 2*x*y = 2*3*2.5 = 15.0
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assert_eq!(r2, 15.0);
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// x*x*1 = 3*3 = 9
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assert_eq!(r3, 9.0);
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}
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