[WIP] Reproduce SR-13263 crash.

Details in comments in test/DebugInfo/sr13263.swift.
dan-zheng · Jul 31, 2020 · a9302ec · a9302ec
1 parent 396709c
commit a9302ec
Show file tree

Hide file tree

Showing 7 changed files with 9,748 additions and 0 deletions.
diff --git a/test/DebugInfo/sr13263-function.ll b/test/DebugInfo/sr13263-function.ll
diff --git a/test/DebugInfo/sr13263-manually-written-conformances.swift b/test/DebugInfo/sr13263-manually-written-conformances.swift
@@ -0,0 +1,104 @@
+// SR-13263: Debug info crash related to optimizations/LoadableByAddress and `Differentiable` derived conformances.
+// This test is a copy of test/DebugInfo/sr13263.swift where `Differentiable` derived conformances are manually written.
+// The crash does not reproduce if the `T: Differentiable` derived conformance is written out by hand.
+
+// RUN: %empty-directory(%t)
+// RUN: %target-swiftc_driver -DM -emit-module -emit-module-path %t/M.swiftmodule %s -module-name M
+// NOTE: The following command crashes:
+// RUN: not --crash %target-swiftc_driver -O -g -I %t -c %s -o /dev/null
+
+#if M
+import _Differentiation
+
+public struct S<T> {
+  class C {}
+  let c: C
+  internal var b: Bool
+}
+
+extension S: AdditiveArithmetic {
+  public static var zero: S { fatalError() }
+
+  public static func == (_ lhs: S, _ rhs: S) -> Bool { fatalError() }
+  public static func + (_ lhs: S, _ rhs: S) -> S { fatalError() }
+  public static func - (_ lhs: S, _ rhs: S) -> S { fatalError() }
+}
+
+extension S: Differentiable {
+  public typealias TangentVector = S
+}
+
+#else
+import _Differentiation
+import M
+
+struct T: Differentiable {
+  var u1: U
+  var u2: U
+
+  // NOTE: The crash does not reproduce if the `T: Differentiable` derived conformance is written out by hand.
+  /*
+  struct TangentVector: Differentiable, AdditiveArithmetic {
+    var u1: U.TangentVector
+    var u2: U.TangentVector
+    typealias TangentVector = Self
+
+    static func + (lhs: Self, rhs: Self) -> Self { Self(u1: lhs.u1 + rhs.u1, u2: lhs.u2 + rhs.u2) }
+    static func - (lhs: Self, rhs: Self) -> Self { Self(u1: lhs.u1 - rhs.u1, u2: lhs.u2 - rhs.u2) }
+    static var zero: Self { Self(u1: .zero, u2: .zero) }
+  }
+
+  mutating func move(along direction: TangentVector) {
+    u1.move(along: direction.u1)
+    u2.move(along: direction.u2)
+  }
+  */
+}
+
+struct U: Differentiable {
+  var s: S<Float>
+  var v: V
+
+  // NOTE: Code below is a manually written version of compiler-synthesized code
+  // for `Differentiable` derived conformances.
+  struct TangentVector: Differentiable, AdditiveArithmetic {
+    var s: S<Float>.TangentVector
+    var v: V.TangentVector
+    typealias TangentVector = Self
+
+    static func + (lhs: Self, rhs: Self) -> Self { Self(s: lhs.s + rhs.s, v: lhs.v + rhs.v) }
+    static func - (lhs: Self, rhs: Self) -> Self { Self(s: lhs.s - rhs.s, v: lhs.v - rhs.v) }
+    static var zero: Self { Self(s: .zero, v: .zero) }
+  }
+
+  mutating func move(along direction: TangentVector) {
+    s.move(along: direction.s)
+    v.move(along: direction.v)
+  }
+}
+
+struct V: Differentiable {
+  var s: S<Float>
+
+  // NOTE: Code below is a manually written version of compiler-synthesized code
+  // for `Differentiable` derived conformances.
+  struct TangentVector: Differentiable, AdditiveArithmetic {
+    var s: S<Float>.TangentVector
+    typealias TangentVector = Self
+
+    static func + (lhs: Self, rhs: Self) -> Self { Self(s: lhs.s + rhs.s) }
+    static func - (lhs: Self, rhs: Self) -> Self { Self(s: lhs.s - rhs.s) }
+    static var zero: Self { Self(s: .zero) }
+  }
+
+  mutating func move(along direction: TangentVector) {
+    s.move(along: direction.s)
+  }
+}
+#endif
+
+// swift-frontend: swift-dev/llvm-project/llvm/lib/CodeGen/AsmPrinter/DwarfExpression.cpp:572: void llvm::DwarfExpression::addFragmentOffset(const llvm::DIExpression *): Assertion `FragmentOffset >= OffsetInBits && "overlapping or duplicate fragments"' failed.
+// Stack dump:
+// 1.	Swift version 5.3-dev (LLVM 6d510c802af0d59, Swift 3e090b483352b3c)
+// 2.	Running pass 'Function Pass Manager' on module '/dev/null'.
+// 3.	Running pass 'X86 Assembly Printer' on function '@"$s4null1TV4move5alongyAC13TangentVectorV_tF"'
diff --git a/test/DebugInfo/sr13263-single-file.swift b/test/DebugInfo/sr13263-single-file.swift
@@ -0,0 +1,45 @@
+// SR-13263: Debug info crash related to optimizations/LoadableByAddress and `Differentiable` derived conformances.
+// This test is a copy of test/DebugInfo/sr13263.swift except it's a single file test case instead of a multi-file one.
+// The crash does not reproduce.
+
+// RUN: %empty-directory(%t)
+// RUN: %target-swiftc_driver -DM -emit-module -emit-module-path %t/M.swiftmodule %s -module-name M
+// NOTE: The following command does not crash:
+// RUN: %target-swiftc_driver -O -g -I %t -c %s -o /dev/null
+
+import _Differentiation
+
+public struct S<T> {
+  class C {}
+  let c: C
+  internal var b: Bool
+}
+
+extension S: AdditiveArithmetic {
+  public static var zero: S { fatalError() }
+
+  public static func == (_ lhs: S, _ rhs: S) -> Bool { fatalError() }
+  public static func + (_ lhs: S, _ rhs: S) -> S { fatalError() }
+  public static func - (_ lhs: S, _ rhs: S) -> S { fatalError() }
+}
+
+extension S: Differentiable {
+  public typealias TangentVector = S
+}
+
+import _Differentiation
+import M
+
+struct T: Differentiable {
+  var u1: U
+  var u2: U
+}
+
+struct U: Differentiable {
+  var s: S<Float>
+  var v: V
+}
+
+struct V: Differentiable {
+  var s: S<Float>
+}