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d07593b352
Co-routines are so expensive (e.g. Array.subscript.read) that it makes sense to enable generic inlining of co-routines.
This will speed up array iteration (e.g. for elem in array { }) in a generic context significantly.
Another example is ManagedBuffer.header.read, which gets much faster.
In both cases, the speedup is mainly because there is no malloc happening anymore.
https://bugs.swift.org/browse/SR-11231
rdar://problem/53777612
35 lines
919 B
Swift
35 lines
919 B
Swift
// RUN: %target-swift-frontend -parse-as-library -O -emit-sil %s | %FileCheck %s
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// REQUIRES: swift_stdlib_no_asserts,optimized_stdlib
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@inline(never)
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func useit<T>(_ t: T) {
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print(t)
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}
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// Check that we inline the Array.subscript.read coroutine
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// CHECK-LABEL: sil @{{.*}}testit
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// CHECK-NOT: begin_apply
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// CHECK-NOT: end_apply
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// CHECK: } // end sil function {{.*}}testit
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public func testit<T>(_ a: [T]) {
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for t in a {
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useit(t)
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}
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}
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// Check that we inline the ManagedBufferPointer.header.read coroutine
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public final class MyBuffer<Element> {
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typealias Manager = ManagedBufferPointer<Int, Element>
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// CHECK-LABEL: sil @{{.*}}MyBuffer{{.*}}countSivg
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// CHECK-NOT: begin_apply
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// CHECK-NOT: end_apply
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// CHECK: } // end sil function {{.*}}MyBuffer{{.*}}countSivg
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public var count: Int {
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return Manager(unsafeBufferObject: self).header
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}
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}
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