swift-mirror/test/DebugInfo/anonymous.swift at 22d37eccd818b51fbbefda5b6f13d2bc8f44f757 - swift-mirror - Gitea: Git with a cup of tea

averello/swift-mirror

mirror of https://github.com/apple/swift.git synced 2025-12-14 20:36:38 +01:00

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Adrian Prantl e574aa765f Don't emit shadow copies for anonymous variables.

Switch statements generate at least one anonymous match variable per
case, which consumes both a lot of stack space and an explosion of
range extension depencies due to the way case statements are scoped.

rdar://problem/34326355

2017-11-16 10:41:40 -08:00

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Swift

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 // RUN: %target-swift-frontend -primary-file %s -emit-ir -g -o - | %FileCheck %s
 // CHECK: !DILocalVariable(name: "x4", arg: 4
 // CHECK: !DILocalVariable(name: "_0", arg: 1
 // CHECK: !DILocalVariable(name: "_1", arg: 2
 // CHECK: !DILocalVariable(name: "_2", arg: 3
 public func fourth<T>(_: T, _: T, _: T, x4 : T) -> T {
   return x4
 }