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d81b5f7e27
Revert "Merge pull request #80767 from meg-gupta/reverttransparent" This reverts commit198a802719, reversing changes made to8eb43af590.
27 lines
1012 B
Swift
27 lines
1012 B
Swift
// RUN: %target-swift-frontend -primary-file %s -emit-ir | %FileCheck %s
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// RUN: %target-swift-frontend -primary-file %s -O -emit-ir | %FileCheck %s
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// REQUIRES: CPU=x86_64 || CPU=arm64
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// https://github.com/swiftlang/swift/issues/78501
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public struct PcgRandom {
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private var state: UInt64 = 0;
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// CHECK-LABEL: define{{.*}}swiftcc i32 @"$s18integer_conversion9PcgRandomV6next32s6UInt32VyF"
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public mutating func next32() -> UInt32 {
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// CHECK-NOT: sSUss17FixedWidthIntegerRzrlEyxqd__cSzRd__lufC
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// CHECK-NOT: sSZss17FixedWidthIntegerRzrlEyxqd__cSzRd__lufC
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// CHECK: ret i32
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let oldstate : UInt64 = state
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state = oldstate &* 6364136223846793005 &+ 1;
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let shifted = oldstate >> 18
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let xor = shifted ^ oldstate
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let xorshifted64 = xor >> 27
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let xorshifted = UInt32((xorshifted64 << 32) >> 32)
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let rot : UInt32 = UInt32(oldstate >> 59)
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let nrot : UInt32 = UInt32(bitPattern: -Int32(rot))
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return (xorshifted >> rot) | (xorshifted << (nrot & 31))
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}
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init() {}
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}
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