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966d617625
Constant-propagate the 0 value when loading "count" or "capacity" from the empty Array, Set or Dictionary storage. On high-level SIL this optimization is also done by the ArrayCountPropagation pass, but only for Array. And even for Array it's sometimes needed to propagate the empty-array count when high-level semantics function are already inlined. Fixes an optimization deficiency for empty OptionSet literals. https://bugs.swift.org/browse/SR-12046 rdar://problem/58861171
45 lines
1.6 KiB
Swift
45 lines
1.6 KiB
Swift
// RUN: %target-swift-frontend -parse-as-library -primary-file %s -O -sil-verify-all -module-name=test -emit-sil | %FileCheck %s
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// RUN: %target-swift-frontend -parse-as-library -primary-file %s -Osize -sil-verify-all -module-name=test -emit-sil | %FileCheck %s
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// REQUIRES: swift_stdlib_no_asserts,optimized_stdlib
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public struct TestOptions: OptionSet {
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public let rawValue: Int
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public init(rawValue: Int) { self.rawValue = rawValue }
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static let first = TestOptions(rawValue: 1 << 0)
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static let second = TestOptions(rawValue: 1 << 1)
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static let third = TestOptions(rawValue: 1 << 2)
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static let fourth = TestOptions(rawValue: 1 << 3)
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}
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// CHECK: sil @{{.*}}returnTestOptions{{.*}}
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// CHECK-NEXT: bb0:
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// CHECK-NEXT: integer_literal {{.*}}, 15
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// CHECK-NEXT: struct $Int
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// CHECK-NEXT: struct $TestOptions
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// CHECK-NEXT: return
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public func returnTestOptions() -> TestOptions {
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return [.first, .second, .third, .fourth]
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}
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// CHECK: sil @{{.*}}returnEmptyTestOptions{{.*}}
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// CHECK-NEXT: bb0:
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// CHECK-NEXT: integer_literal {{.*}}, 0
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// CHECK-NEXT: struct $Int
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// CHECK-NEXT: struct $TestOptions
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// CHECK-NEXT: return
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public func returnEmptyTestOptions() -> TestOptions {
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return []
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}
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// CHECK: alloc_global @{{.*}}globalTestOptions{{.*}}
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// CHECK-NEXT: global_addr
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// CHECK-NEXT: integer_literal {{.*}}, 15
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// CHECK-NEXT: struct $Int
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// CHECK-NEXT: struct $TestOptions
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// CHECK-NEXT: store
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// CHECK-NEXT: tuple
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// CHECK-NEXT: return
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let globalTestOptions: TestOptions = [.first, .second, .third, .fourth]
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