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d3b6b89de6
`DifferentiableFunctionInst` now stores result indices. `SILAutoDiffIndices` now stores result indices instead of a source index. `@differentiable` SIL function types may now have multiple differentiability result indices and `@noDerivative` resutls. `@differentiable` AST function types do not have `@noDerivative` results (yet), so this functionality is not exposed to users. Resolves TF-689 and TF-1256. Infrastructural support for TF-983: supporting differentiation of `apply` instructions with multiple active semantic results.
44 lines
2.7 KiB
Swift
44 lines
2.7 KiB
Swift
// RUN: %target-swift-frontend -emit-silgen %s | %FileCheck %s --check-prefix=CHECK-SILGEN
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// RUN: %target-swift-frontend -enable-experimental-forward-mode-differentiation -emit-sil %s | %FileCheck %s --check-prefix=CHECK-SIL
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// Simple differentiation transform test: check SIL before and after the transform.
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import _Differentiation
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@_silgen_name("basic")
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@differentiable
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func basic(_ x: Float) -> Float { x }
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// Test differentiability witnesses.
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// CHECK-SILGEN-LABEL: sil_differentiability_witness hidden [parameters 0] [results 0] @basic : $@convention(thin) (Float) -> Float {
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// CHECK-SILGEN-NEXT: }
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// CHECK-SIL-LABEL: sil_differentiability_witness hidden [parameters 0] [results 0] @basic : $@convention(thin) (Float) -> Float {
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// CHECK-SIL-NEXT: jvp: @AD__basic__jvp_src_0_wrt_0 : $@convention(thin) (Float) -> (Float, @owned @callee_guaranteed (Float) -> Float)
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// CHECK-SIL-NEXT: vjp: @AD__basic__vjp_src_0_wrt_0 : $@convention(thin) (Float) -> (Float, @owned @callee_guaranteed (Float) -> Float)
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// CHECK-SIL-NEXT: }
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// Test `differentiable_function` instructions.
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@_silgen_name("test_differentiable_function")
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func testDifferentiableFunction() {
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let _: @differentiable (Float) -> Float = basic
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}
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// CHECK-SILGEN-LABEL: sil hidden [ossa] @test_differentiable_function : $@convention(thin) () -> () {
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// CHECK-SILGEN: [[ORIG_FN_REF:%.*]] = function_ref @basic : $@convention(thin) (Float) -> Float
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// CHECK-SILGEN: [[ORIG_FN:%.*]] = thin_to_thick_function [[ORIG_FN_REF]] : $@convention(thin) (Float) -> Float to $@callee_guaranteed (Float) -> Float
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// CHECK-SILGEN: [[DIFF_FN:%.*]] = differentiable_function [parameters 0] [results 0] [[ORIG_FN]] : $@callee_guaranteed (Float) -> Float
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// CHECK-SILGEN: }
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// CHECK-SIL-LABEL: sil hidden @test_differentiable_function : $@convention(thin) () -> () {
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// CHECK-SIL: [[ORIG_FN_REF:%.*]] = function_ref @basic : $@convention(thin) (Float) -> Float
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// CHECK-SIL: [[ORIG_FN:%.*]] = thin_to_thick_function [[ORIG_FN_REF]]
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// CHECK-SIL: [[JVP_FN_REF:%.*]] = differentiability_witness_function [jvp] [parameters 0] [results 0] @basic
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// CHECK-SIL: [[JVP_FN:%.*]] = thin_to_thick_function [[JVP_FN_REF]]
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// CHECK-SIL: [[VJP_FN_REF:%.*]] = differentiability_witness_function [vjp] [parameters 0] [results 0] @basic
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// CHECK-SIL: [[VJP_FN:%.*]] = thin_to_thick_function [[VJP_FN_REF]]
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// CHECK-SIL: [[DIFF_FN:%.*]] = differentiable_function [parameters 0] [results 0] [[ORIG_FN]] : $@callee_guaranteed (Float) -> Float with_derivative {[[JVP_FN]] : $@callee_guaranteed (Float) -> (Float, @owned @callee_guaranteed (Float) -> Float), [[VJP_FN]] : $@callee_guaranteed (Float) -> (Float, @owned @callee_guaranteed (Float) -> Float)}
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// CHECK-SIL: }
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