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phase_execution.carbon

phase_execution.carbon 18 KB
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  1. // Part of the Carbon Language project, under the Apache License v2.0 with LLVM
    2. 

  2. // Exceptions. See /LICENSE for license information.
    3. 

  3. // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
    4. 

  4. 

  5. package ExplorerTest api;
    6. 

  6. 

  7. class T {}
    8. 

  8. 

  9. fn Main() -> i32 {
    10. 

  10.   var x: T = {};
    11. 

  11.   return 0;
    12. 

  12. }
    13. 

  13. 

  14. // Place checks after code so that line numbers are stable, reducing merge
    15. 

  15. // conflicts.
    16. 

  16. // ARGS: --trace_file=- --trace_phase=execution %s
    17. 

  17. // AUTOUPDATE
    18. 

  18. 

  19. // CHECK:STDOUT: * * * * * * * * * *  starting execution  * * * * * * * * * *
    20. 

  20. // CHECK:STDOUT: ------------------------------------------------------------
    21. 

  21. // CHECK:STDOUT:
    22. 

  22. // CHECK:STDOUT: - - - - -  initializing globals  - - - - -
    23. 

  23. // CHECK:STDOUT: ------------------------------------------
    24. 

  24. // CHECK:STDOUT: >[] stack-push: DeclarationAction pos: 0 `class T` (phase_execution.carbon:7)
    25. 

  25. // CHECK:STDOUT: ->> step DeclarationAction pos: 0 `class T` (phase_execution.carbon:7) --->
    26. 

  26. // CHECK:STDOUT:
    27. 

  27. // CHECK:STDOUT: *** declaration at (phase_execution.carbon:7)
    28. 

  28. // CHECK:STDOUT: ```
    29. 

  29. // CHECK:STDOUT: class T {
    30. 

  30. // CHECK:STDOUT: }
    31. 

  31. // CHECK:STDOUT: ```
    32. 

  32. // CHECK:STDOUT: <[] stack-pop:  DeclarationAction pos: 0 `class T` (phase_execution.carbon:7)
    33. 

  33. // CHECK:STDOUT: >[] stack-push: DeclarationAction pos: 0 `fn Main` (phase_execution.carbon:12)
    34. 

  34. // CHECK:STDOUT: ->> step DeclarationAction pos: 0 `fn Main` (phase_execution.carbon:12) --->
    35. 

  35. // CHECK:STDOUT:
    36. 

  36. // CHECK:STDOUT: *** declaration at (phase_execution.carbon:12)
    37. 

  37. // CHECK:STDOUT: ```
    38. 

  38. // CHECK:STDOUT: fn Main () -> i32
    39. 

  39. // CHECK:STDOUT: {
    40. 

  40. // CHECK:STDOUT:   var x: T = {}.(interface ImplicitAs(T = class T).Convert)();
    41. 

  41. // CHECK:STDOUT:   return 0;
    42. 

  42. // CHECK:STDOUT: }
    43. 

  43. // CHECK:STDOUT: ```
    44. 

  44. // CHECK:STDOUT: <[] stack-pop:  DeclarationAction pos: 0 `fn Main` (phase_execution.carbon:12)
    45. 

  45. // CHECK:STDOUT:
    46. 

  46. // CHECK:STDOUT: - - - - -  calling main function  - - - - -
    47. 

  47. // CHECK:STDOUT: -------------------------------------------
    48. 

  48. // CHECK:STDOUT: >[] stack-push: ValueExpressionAction pos: 0 `Main()` (<Main()>:0)
    49. 

  49. // CHECK:STDOUT: ->> step ValueExpressionAction pos: 0 `Main()` (<Main()>:0) --->
    50. 

  50. // CHECK:STDOUT: >[] stack-push: ExpressionAction pos: 0 `Main()` (<Main()>:0)
    51. 

  51. // CHECK:STDOUT: ->> step ExpressionAction pos: 0 `Main()` (<Main()>:0) --->
    52. 

  52. // CHECK:STDOUT: >[] stack-push: ValueExpressionAction pos: 0 `Main` (<Main()>:0)
    53. 

  53. // CHECK:STDOUT: ->> step ValueExpressionAction pos: 0 `Main` (<Main()>:0) --->
    54. 

  54. // CHECK:STDOUT: >[] stack-push: ExpressionAction pos: 0 `Main` (<Main()>:0)
    55. 

  55. // CHECK:STDOUT: ->> step ExpressionAction pos: 0 `Main` (<Main()>:0) --->
    56. 

  56. // CHECK:STDOUT: <[] stack-pop:  ExpressionAction pos: 0 `Main` (<Main()>:0)
    57. 

  57. // CHECK:STDOUT: ->> step ValueExpressionAction pos: 1 `Main` results: [`fun<Main>`]  (<Main()>:0) --->
    58. 

  58. // CHECK:STDOUT: <[] stack-pop:  ValueExpressionAction pos: 1 `Main` results: [`fun<Main>`]  (<Main()>:0)
    59. 

  59. // CHECK:STDOUT: ->> step ExpressionAction pos: 1 `Main()` results: [`fun<Main>`]  scope: [] (<Main()>:0) --->
    60. 

  60. // CHECK:STDOUT: -() calling function: fun<Main>
    61. 

  61. // CHECK:STDOUT: === match pattern `()`
    62. 

  62. // CHECK:STDOUT:     from value expression with value `()`
    63. 

  63. // CHECK:STDOUT: >[] stack-push: ScopeAction pos: 0  scope: [] (None)
    64. 

  64. // CHECK:STDOUT: >[] stack-push: StatementAction pos: 0 `{ ... }` (phase_execution.carbon:12)
    65. 

  65. // CHECK:STDOUT: ->> step StatementAction pos: 0 `{ ... }` (phase_execution.carbon:12) --->
    66. 

  66. // CHECK:STDOUT:
    67. 

  67. // CHECK:STDOUT: *** statement at (phase_execution.carbon:12)
    68. 

  68. // CHECK:STDOUT: ```
    69. 

  69. // CHECK:STDOUT: {
    70. 

  70. // CHECK:STDOUT:   var x: T = {}.(interface ImplicitAs(T = class T).Convert)();
    71. 

  71. // CHECK:STDOUT:   return 0;
    72. 

  72. // CHECK:STDOUT: }
    73. 

  73. // CHECK:STDOUT: ```
    74. 

  74. // CHECK:STDOUT: >[] stack-push: StatementAction pos: 0 `var ... = ...;` (phase_execution.carbon:10)
    75. 

  75. // CHECK:STDOUT: ->> step StatementAction pos: 0 `var ... = ...;` (phase_execution.carbon:10) --->
    76. 

  76. // CHECK:STDOUT:
    77. 

  77. // CHECK:STDOUT: *** statement at (phase_execution.carbon:10)
    78. 

  78. // CHECK:STDOUT: ```
    79. 

  79. // CHECK:STDOUT: var x: T = {}.(interface ImplicitAs(T = class T).Convert)();
    80. 

  80. // CHECK:STDOUT: ```
    81. 

  81. // CHECK:STDOUT: ++# memory-alloc: #1 `Uninit<class T>` uninitialized
    82. 

  82. // CHECK:STDOUT: >[] stack-push: ExpressionAction pos: 0 `{}.(interface ImplicitAs(T = class T).Convert)()` (phase_execution.carbon:10)
    83. 

  83. // CHECK:STDOUT: ->> step ExpressionAction pos: 0 `{}.(interface ImplicitAs(T = class T).Convert)()` (phase_execution.carbon:10) --->
    84. 

  84. // CHECK:STDOUT: >[] stack-push: ValueExpressionAction pos: 0 `{}.(interface ImplicitAs(T = class T).Convert)` (phase_execution.carbon:10)
    85. 

  85. // CHECK:STDOUT: ->> step ValueExpressionAction pos: 0 `{}.(interface ImplicitAs(T = class T).Convert)` (phase_execution.carbon:10) --->
    86. 

  86. // CHECK:STDOUT: >[] stack-push: ExpressionAction pos: 0 `{}.(interface ImplicitAs(T = class T).Convert)` (phase_execution.carbon:10)
    87. 

  87. // CHECK:STDOUT: ->> step ExpressionAction pos: 0 `{}.(interface ImplicitAs(T = class T).Convert)` (phase_execution.carbon:10) --->
    88. 

  88. // CHECK:STDOUT: >[] stack-push: ValueExpressionAction pos: 0 `{}` (phase_execution.carbon:10)
    89. 

  89. // CHECK:STDOUT: ->> step ValueExpressionAction pos: 0 `{}` (phase_execution.carbon:10) --->
    90. 

  90. // CHECK:STDOUT: >[] stack-push: ExpressionAction pos: 0 `{}` (phase_execution.carbon:10)
    91. 

  91. // CHECK:STDOUT: ->> step ExpressionAction pos: 0 `{}` (phase_execution.carbon:10) --->
    92. 

  92. // CHECK:STDOUT: <[] stack-pop:  ExpressionAction pos: 0 `{}` (phase_execution.carbon:10)
    93. 

  93. // CHECK:STDOUT: ->> step ValueExpressionAction pos: 1 `{}` results: [`{}`]  (phase_execution.carbon:10) --->
    94. 

  94. // CHECK:STDOUT: <[] stack-pop:  ValueExpressionAction pos: 1 `{}` results: [`{}`]  (phase_execution.carbon:10)
    95. 

  95. // CHECK:STDOUT: ->> step ExpressionAction pos: 1 `{}.(interface ImplicitAs(T = class T).Convert)` results: [`{}`]  (phase_execution.carbon:10) --->
    96. 

  96. // CHECK:STDOUT: >[] stack-push: WitnessAction pos: 0 `witness for impl T as ImplicitAs(U)` (phase_execution.carbon:10)
    97. 

  97. // CHECK:STDOUT: ->> step WitnessAction pos: 0 `witness for impl T as ImplicitAs(U)` (phase_execution.carbon:10) --->
    98. 

  98. // CHECK:STDOUT: <[] stack-pop:  WitnessAction pos: 0 `witness for impl T as ImplicitAs(U)` (phase_execution.carbon:10)
    99. 

  99. // CHECK:STDOUT: ->> step ExpressionAction pos: 2 `{}.(interface ImplicitAs(T = class T).Convert)` results: [`{}`, `witness for impl T as ImplicitAs(U)`]  (phase_execution.carbon:10) --->
    100. 

  100. // CHECK:STDOUT: >[] stack-push: TypeInstantiationAction pos: 0 `interface As(T = class T)` (phase_execution.carbon:10)
    101. 

  101. // CHECK:STDOUT: ->> step TypeInstantiationAction pos: 0 `interface As(T = class T)` (phase_execution.carbon:10) --->
    102. 

  102. // CHECK:STDOUT: ->> instantiating type `interface As(T = class T)` (phase_execution.carbon:10)
    103. 

  103. // CHECK:STDOUT: ->> instantiating type `class T` (phase_execution.carbon:10)
    104. 

  104. // CHECK:STDOUT: <<- instantiated type `class T` as `class T` (phase_execution.carbon:10)
    105. 

  105. // CHECK:STDOUT: <<- instantiated type `interface As(T = class T)` as `interface As(T = class T)` (phase_execution.carbon:10)
    106. 

  106. // CHECK:STDOUT: <[] stack-pop:  TypeInstantiationAction pos: 0 `interface As(T = class T)` (phase_execution.carbon:10)
    107. 

  107. // CHECK:STDOUT: ->> step ExpressionAction pos: 3 `{}.(interface ImplicitAs(T = class T).Convert)` results: [`{}`, `witness for impl T as ImplicitAs(U)`, `interface As(T = class T)`]  (phase_execution.carbon:10) --->
    108. 

  108. // CHECK:STDOUT: ->> step ExpressionAction pos: 4 `{}.(interface ImplicitAs(T = class T).Convert)` results: [`{}`, `witness for impl T as ImplicitAs(U)`, `interface As(T = class T)`]  (phase_execution.carbon:10) --->
    109. 

  109. // CHECK:STDOUT: <[] stack-pop:  ExpressionAction pos: 4 `{}.(interface ImplicitAs(T = class T).Convert)` results: [`{}`, `witness for impl T as ImplicitAs(U)`, `interface As(T = class T)`]  (phase_execution.carbon:10)
    110. 

  110. // CHECK:STDOUT: ->> step ValueExpressionAction pos: 1 `{}.(interface ImplicitAs(T = class T).Convert)` results: [`bound_method<Convert>`]  (phase_execution.carbon:10) --->
    111. 

  111. // CHECK:STDOUT: <[] stack-pop:  ValueExpressionAction pos: 1 `{}.(interface ImplicitAs(T = class T).Convert)` results: [`bound_method<Convert>`]  (phase_execution.carbon:10)
    112. 

  112. // CHECK:STDOUT: ->> step ExpressionAction pos: 1 `{}.(interface ImplicitAs(T = class T).Convert)()` results: [`bound_method<Convert>`]  scope: [] (phase_execution.carbon:10) --->
    113. 

  113. // CHECK:STDOUT: -() calling function: bound_method<Convert>
    114. 

  114. // CHECK:STDOUT: === match pattern `Placeholder<self>`
    115. 

  115. // CHECK:STDOUT:     from value expression with value `{}`
    116. 

  116. // CHECK:STDOUT: === match pattern `()`
    117. 

  117. // CHECK:STDOUT:     from value expression with value `()`
    118. 

  118. // CHECK:STDOUT: >[] stack-push: ScopeAction pos: 0  scope: [`self: Self`: `{}`] (None)
    119. 

  119. // CHECK:STDOUT: >[] stack-push: StatementAction pos: 0 `{ ... }` (prelude.carbon:{{\d+}})
    120. 

  120. // CHECK:STDOUT: ->> step StatementAction pos: 0 `{ ... }` (prelude.carbon:{{\d+}}) --->
    121. 

  121. // CHECK:STDOUT:
    122. 

  122. // CHECK:STDOUT: *** statement at (prelude.carbon:{{\d+}})
    123. 

  123. // CHECK:STDOUT: ```
    124. 

  124. // CHECK:STDOUT: {
    125. 

  125. // CHECK:STDOUT:   return __intrinsic_implicit_as_convert(self, U);
    126. 

  126. // CHECK:STDOUT: }
    127. 

  127. // CHECK:STDOUT: ```
    128. 

  128. // CHECK:STDOUT: >[] stack-push: StatementAction pos: 0 `return ...;` (prelude.carbon:{{\d+}})
    129. 

  129. // CHECK:STDOUT: ->> step StatementAction pos: 0 `return ...;` (prelude.carbon:{{\d+}}) --->
    130. 

  130. // CHECK:STDOUT:
    131. 

  131. // CHECK:STDOUT: *** statement at (prelude.carbon:{{\d+}})
    132. 

  132. // CHECK:STDOUT: ```
    133. 

  133. // CHECK:STDOUT: return __intrinsic_implicit_as_convert(self, U);
    134. 

  134. // CHECK:STDOUT: ```
    135. 

  135. // CHECK:STDOUT: >[] stack-push: ValueExpressionAction pos: 0 `__intrinsic_implicit_as_convert(self, U)` (prelude.carbon:{{\d+}})
    136. 

  136. // CHECK:STDOUT: ->> step ValueExpressionAction pos: 0 `__intrinsic_implicit_as_convert(self, U)` (prelude.carbon:{{\d+}}) --->
    137. 

  137. // CHECK:STDOUT: >[] stack-push: ExpressionAction pos: 0 `__intrinsic_implicit_as_convert(self, U)` (prelude.carbon:{{\d+}})
    138. 

  138. // CHECK:STDOUT: ->> step ExpressionAction pos: 0 `__intrinsic_implicit_as_convert(self, U)` (prelude.carbon:{{\d+}}) --->
    139. 

  139. // CHECK:STDOUT: <[] stack-pop:  ExpressionAction pos: 0 `__intrinsic_implicit_as_convert(self, U)` (prelude.carbon:{{\d+}})
    140. 

  140. // CHECK:STDOUT: >[] stack-push: ExpressionAction pos: 0 `self` (prelude.carbon:{{\d+}})
    141. 

  141. // CHECK:STDOUT: ->> step ExpressionAction pos: 0 `self` (prelude.carbon:{{\d+}}) --->
    142. 

  142. // CHECK:STDOUT: >[] stack-push: ValueExpressionAction pos: 0 `self` (prelude.carbon:{{\d+}})
    143. 

  143. // CHECK:STDOUT: ->> step ValueExpressionAction pos: 0 `self` (prelude.carbon:{{\d+}}) --->
    144. 

  144. // CHECK:STDOUT: >[] stack-push: ExpressionAction pos: 0 `self` (prelude.carbon:{{\d+}})
    145. 

  145. // CHECK:STDOUT: ->> step ExpressionAction pos: 0 `self` (prelude.carbon:{{\d+}}) --->
    146. 

  146. // CHECK:STDOUT: <[] stack-pop:  ExpressionAction pos: 0 `self` (prelude.carbon:{{\d+}})
    147. 

  147. // CHECK:STDOUT: ->> step ValueExpressionAction pos: 1 `self` results: [`{}`]  (prelude.carbon:{{\d+}}) --->
    148. 

  148. // CHECK:STDOUT: <[] stack-pop:  ValueExpressionAction pos: 1 `self` results: [`{}`]  (prelude.carbon:{{\d+}})
    149. 

  149. // CHECK:STDOUT: ->> step ExpressionAction pos: 1 `self` results: [`{}`]  (prelude.carbon:{{\d+}}) --->
    150. 

  150. // CHECK:STDOUT: >[] stack-push: TypeInstantiationAction pos: 0 `class T` (prelude.carbon:{{\d+}})
    151. 

  151. // CHECK:STDOUT: ->> step TypeInstantiationAction pos: 0 `class T` (prelude.carbon:{{\d+}}) --->
    152. 

  152. // CHECK:STDOUT: <[] stack-pop:  TypeInstantiationAction pos: 0 `class T` (prelude.carbon:{{\d+}})
    153. 

  153. // CHECK:STDOUT: ->> step ExpressionAction pos: 2 `self` results: [`{}`, `class T`]  (prelude.carbon:{{\d+}}) --->
    154. 

  154. // CHECK:STDOUT: ->> instantiating type `class T` (prelude.carbon:{{\d+}})
    155. 

  155. // CHECK:STDOUT: <<- instantiated type `class T` as `class T` (prelude.carbon:{{\d+}})
    156. 

  156. // CHECK:STDOUT: <[] stack-pop:  ExpressionAction pos: 2 `self` results: [`{}`, `class T`]  (prelude.carbon:{{\d+}})
    157. 

  157. // CHECK:STDOUT: ->> step ValueExpressionAction pos: 1 `__intrinsic_implicit_as_convert(self, U)` results: [`T{}`]  (prelude.carbon:{{\d+}}) --->
    158. 

  158. // CHECK:STDOUT: <[] stack-pop:  ValueExpressionAction pos: 1 `__intrinsic_implicit_as_convert(self, U)` results: [`T{}`]  (prelude.carbon:{{\d+}})
    159. 

  159. // CHECK:STDOUT: ->> step StatementAction pos: 1 `return ...;` results: [`T{}`]  (prelude.carbon:{{\d+}}) --->
    160. 

  160. // CHECK:STDOUT:
    161. 

  161. // CHECK:STDOUT: *** statement at (prelude.carbon:{{\d+}})
    162. 

  162. // CHECK:STDOUT: ```
    163. 

  163. // CHECK:STDOUT: return __intrinsic_implicit_as_convert(self, U);
    164. 

  164. // CHECK:STDOUT: ```
    165. 

  165. // CHECK:STDOUT: --> memory-write: #1 `T{}`
    166. 

  166. // CHECK:STDOUT: <[] stack-pop:  StatementAction pos: 1 `return ...;` results: [`T{}`]  (prelude.carbon:{{\d+}})
    167. 

  167. // CHECK:STDOUT: <[] stack-pop:  StatementAction pos: 1 `{ ... }` scope: [] (prelude.carbon:{{\d+}})
    168. 

  168. // CHECK:STDOUT: <[] stack-pop:  ScopeAction pos: 0  scope: [`self: Self`: `{}`] (None)
    169. 

  169. // CHECK:STDOUT: >[] stack-push: CleanUpAction pos: 0  scope: [`self: Self`: `{}`] (stack cleanup:1)
    170. 

  170. // CHECK:STDOUT: >[] stack-push: CleanUpAction pos: 0  scope: [] (stack cleanup:1)
    171. 

  171. // CHECK:STDOUT: ->> step CleanUpAction pos: 0  scope: [] (stack cleanup:1) --->
    172. 

  172. // CHECK:STDOUT: <[] stack-pop:  CleanUpAction pos: 0  scope: [] (stack cleanup:1)
    173. 

  173. // CHECK:STDOUT: ->> step CleanUpAction pos: 0  scope: [`self: Self`: `{}`] (stack cleanup:1) --->
    174. 

  174. // CHECK:STDOUT: <[] stack-pop:  CleanUpAction pos: 0  scope: [`self: Self`: `{}`] (stack cleanup:1)
    175. 

  175. // CHECK:STDOUT: ->> step ExpressionAction pos: 2 `{}.(interface ImplicitAs(T = class T).Convert)()` results: [`bound_method<Convert>`, `T{}`]  scope: [] (phase_execution.carbon:10) --->
    176. 

  176. // CHECK:STDOUT: <[] stack-pop:  ExpressionAction pos: 2 `{}.(interface ImplicitAs(T = class T).Convert)()` results: [`bound_method<Convert>`, `T{}`]  scope: [] (phase_execution.carbon:10)
    177. 

  177. // CHECK:STDOUT: >[] stack-push: CleanUpAction pos: 0  scope: [] (stack cleanup:1)
    178. 

  178. // CHECK:STDOUT: ->> step CleanUpAction pos: 0  scope: [] (stack cleanup:1) --->
    179. 

  179. // CHECK:STDOUT: <[] stack-pop:  CleanUpAction pos: 0  scope: [] (stack cleanup:1)
    180. 

  180. // CHECK:STDOUT: ->> step StatementAction pos: 1 `var ... = ...;` results: [`T{}`]  (phase_execution.carbon:10) --->
    181. 

  181. // CHECK:STDOUT:
    182. 

  182. // CHECK:STDOUT: *** statement at (phase_execution.carbon:10)
    183. 

  183. // CHECK:STDOUT: ```
    184. 

  184. // CHECK:STDOUT: var x: T = {}.(interface ImplicitAs(T = class T).Convert)();
    185. 

  185. // CHECK:STDOUT: ```
    186. 

  186. // CHECK:STDOUT: <-- memory-read: #1 `T{}`
    187. 

  187. // CHECK:STDOUT: === match pattern `Placeholder<x>`
    188. 

  188. // CHECK:STDOUT:     from initializing expression with value `T{}`
    189. 

  189. // CHECK:STDOUT: <[] stack-pop:  StatementAction pos: 1 `var ... = ...;` results: [`T{}`]  (phase_execution.carbon:10)
    190. 

  190. // CHECK:STDOUT: ->> step StatementAction pos: 1 `{ ... }` scope: [`x: T`: `lval<Allocation(1)>`] (phase_execution.carbon:12) --->
    191. 

  191. // CHECK:STDOUT:
    192. 

  192. // CHECK:STDOUT: *** statement at (phase_execution.carbon:12)
    193. 

  193. // CHECK:STDOUT: ```
    194. 

  194. // CHECK:STDOUT: {
    195. 

  195. // CHECK:STDOUT:   var x: T = {}.(interface ImplicitAs(T = class T).Convert)();
    196. 

  196. // CHECK:STDOUT:   return 0;
    197. 

  197. // CHECK:STDOUT: }
    198. 

  198. // CHECK:STDOUT: ```
    199. 

  199. // CHECK:STDOUT: >[] stack-push: StatementAction pos: 0 `return ...;` (phase_execution.carbon:11)
    200. 

  200. // CHECK:STDOUT: ->> step StatementAction pos: 0 `return ...;` (phase_execution.carbon:11) --->
    201. 

  201. // CHECK:STDOUT:
    202. 

  202. // CHECK:STDOUT: *** statement at (phase_execution.carbon:11)
    203. 

  203. // CHECK:STDOUT: ```
    204. 

  204. // CHECK:STDOUT: return 0;
    205. 

  205. // CHECK:STDOUT: ```
    206. 

  206. // CHECK:STDOUT: >[] stack-push: ValueExpressionAction pos: 0 `0` (phase_execution.carbon:11)
    207. 

  207. // CHECK:STDOUT: ->> step ValueExpressionAction pos: 0 `0` (phase_execution.carbon:11) --->
    208. 

  208. // CHECK:STDOUT: >[] stack-push: ExpressionAction pos: 0 `0` (phase_execution.carbon:11)
    209. 

  209. // CHECK:STDOUT: ->> step ExpressionAction pos: 0 `0` (phase_execution.carbon:11) --->
    210. 

  210. // CHECK:STDOUT: <[] stack-pop:  ExpressionAction pos: 0 `0` (phase_execution.carbon:11)
    211. 

  211. // CHECK:STDOUT: ->> step ValueExpressionAction pos: 1 `0` results: [`0`]  (phase_execution.carbon:11) --->
    212. 

  212. // CHECK:STDOUT: <[] stack-pop:  ValueExpressionAction pos: 1 `0` results: [`0`]  (phase_execution.carbon:11)
    213. 

  213. // CHECK:STDOUT: ->> step StatementAction pos: 1 `return ...;` results: [`0`]  (phase_execution.carbon:11) --->
    214. 

  214. // CHECK:STDOUT:
    215. 

  215. // CHECK:STDOUT: *** statement at (phase_execution.carbon:11)
    216. 

  216. // CHECK:STDOUT: ```
    217. 

  217. // CHECK:STDOUT: return 0;
    218. 

  218. // CHECK:STDOUT: ```
    219. 

  219. // CHECK:STDOUT: <[] stack-pop:  StatementAction pos: 1 `return ...;` results: [`0`]  (phase_execution.carbon:11)
    220. 

  220. // CHECK:STDOUT: <[] stack-pop:  StatementAction pos: 2 `{ ... }` scope: [`x: T`: `lval<Allocation(1)>`] (phase_execution.carbon:12)
    221. 

  221. // CHECK:STDOUT: <[] stack-pop:  ScopeAction pos: 0  scope: [] (None)
    222. 

  222. // CHECK:STDOUT: >[] stack-push: CleanUpAction pos: 0  scope: [] (stack cleanup:1)
    223. 

  223. // CHECK:STDOUT: >[] stack-push: CleanUpAction pos: 0  scope: [`x: T`: `lval<Allocation(1)>`] (stack cleanup:1)
    224. 

  224. // CHECK:STDOUT: ->> step CleanUpAction pos: 0  scope: [`x: T`: `lval<Allocation(1)>`] (stack cleanup:1) --->
    225. 

  225. // CHECK:STDOUT: <-- memory-read: #1 `T{}`
    226. 

  226. // CHECK:STDOUT: >[] stack-push: DestroyAction pos: 0  (None)
    227. 

  227. // CHECK:STDOUT: ->> step DestroyAction pos: 0  (None) --->
    228. 

  228. // CHECK:STDOUT: ->> step DestroyAction pos: 1  (None) --->
    229. 

  229. // CHECK:STDOUT: ->> step DestroyAction pos: 2  (None) --->
    230. 

  230. // CHECK:STDOUT: <[] stack-pop:  DestroyAction pos: 2  (None)
    231. 

  231. // CHECK:STDOUT: ->> step CleanUpAction pos: 1  scope: [`x: T`: `lval<Allocation(1)>`] (stack cleanup:1) --->
    232. 

  232. // CHECK:STDOUT: --# memory-dealloc: #1 `T{}`
    233. 

  233. // CHECK:STDOUT: ->> step CleanUpAction pos: 2  scope: [`x: T`: `lval<Allocation(1)>`] (stack cleanup:1) --->
    234. 

  234. // CHECK:STDOUT: <[] stack-pop:  CleanUpAction pos: 2  scope: [`x: T`: `lval<Allocation(1)>`] (stack cleanup:1)
    235. 

  235. // CHECK:STDOUT: ->> step CleanUpAction pos: 0  scope: [] (stack cleanup:1) --->
    236. 

  236. // CHECK:STDOUT: <[] stack-pop:  CleanUpAction pos: 0  scope: [] (stack cleanup:1)
    237. 

  237. // CHECK:STDOUT: ->> step ExpressionAction pos: 2 `Main()` results: [`fun<Main>`, `0`]  scope: [] (<Main()>:0) --->
    238. 

  238. // CHECK:STDOUT: <[] stack-pop:  ExpressionAction pos: 2 `Main()` results: [`fun<Main>`, `0`]  scope: [] (<Main()>:0)
    239. 

  239. // CHECK:STDOUT: >[] stack-push: CleanUpAction pos: 0  scope: [] (stack cleanup:1)
    240. 

  240. // CHECK:STDOUT: ->> step CleanUpAction pos: 0  scope: [] (stack cleanup:1) --->
    241. 

  241. // CHECK:STDOUT: <[] stack-pop:  CleanUpAction pos: 0  scope: [] (stack cleanup:1)
    242. 

  242. // CHECK:STDOUT: ->> step ValueExpressionAction pos: 1 `Main()` results: [`0`]  (<Main()>:0) --->
    243. 

  243. // CHECK:STDOUT: <[] stack-pop:  ValueExpressionAction pos: 1 `Main()` results: [`0`]  (<Main()>:0)
    244. 

  244. // CHECK:STDOUT: ==> interpreter result: 0
    245. 

  245. // CHECK:STDOUT: result: 0
    246.