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layout.carbon

layout.carbon 24 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. 

  5. // INCLUDE-FILE: toolchain/testing/testdata/min_prelude/int.carbon
    6. 

  6. //
    7. 

  7. // AUTOUPDATE
    8. 

  8. // TIP: To test this file alone, run:
    9. 

  9. // TIP:   bazel test //toolchain/testing:file_test --test_arg=--file_tests=toolchain/lower/testdata/struct/layout.carbon
    10. 

  10. // TIP: To dump output, run:
    11. 

  11. // TIP:   bazel run //toolchain/testing:file_test -- --dump_output --file_tests=toolchain/lower/testdata/struct/layout.carbon
    12. 

  12. 

  13. // --- no_padding.carbon
    14. 

  14. library "[[@TEST_NAME]]";
    15. 

  15. 

  16. fn G(p: i32*);
    17. 

  17. 

  18. fn F() {
    19. 

  19.   // LLVM {i32, i32, i32} matches the Carbon layout, so we use it.
    20. 

  20.   var no_padding: {.x: i32, .y: i32, .z: i32};
    21. 

  21.   G(&no_padding.x);
    22. 

  22.   G(&no_padding.y);
    23. 

  23.   G(&no_padding.z);
    24. 

  24. }
    25. 

  25. 

  26. // --- avoid_tail_padding.carbon
    27. 

  27. library "[[@TEST_NAME]]";
    28. 

  28. 

  29. fn G(p: i32*);
    30. 

  30. 

  31. fn F() {
    32. 

  32.   // LLVM {ptr, i32} would have a size of 16, so we use a packed struct.
    33. 

  33.   var avoid_tail_padding: {.x: ()*, .y: i32};
    34. 

  34.   G(&avoid_tail_padding.y);
    35. 

  35. }
    36. 

  36. 

  37. // --- use_tail_padding.carbon
    38. 

  38. library "[[@TEST_NAME]]";
    39. 

  39. 

  40. fn G(p: i32*);
    41. 

  41. 

  42. fn F() {
    43. 

  43.   // LLVM {ptr, i32} would have a size of 16, so we use a packed struct as the
    44. 

  44.   // type of `.a`. `.b` goes in the tail padding.
    45. 

  45.   var use_tail_padding: {.a: {.x: ()*, .y: i32}, .b: i32};
    46. 

  46.   G(&use_tail_padding.a.y);
    47. 

  47.   G(&use_tail_padding.b);
    48. 

  48. }
    49. 

  49. 

  50. // --- implicit_padding.carbon
    51. 

  51. library "[[@TEST_NAME]]";
    52. 

  52. 

  53. fn G(p: ()**);
    54. 

  54. 

  55. fn F() {
    56. 

  56.   // LLVM {<{ptr, i32}>, ptr} inserts the right padding before `.b`, so we use
    57. 

  57.   // it directly.
    58. 

  58.   var implicit_padding: {.a: {.x: ()*, .y: i32}, .b: ()*};
    59. 

  59.   G(&implicit_padding.a.x);
    60. 

  60.   G(&implicit_padding.b);
    61. 

  61. }
    62. 

  62. 

  63. // --- insert_padding.carbon
    64. 

  64. library "[[@TEST_NAME]]";
    65. 

  65. 

  66. fn G(p: ()**);
    67. 

  67. 

  68. fn F() {
    69. 

  69.   // LLVM {<{i32, i32, i32}>, ptr, i32} would have extra tail padding, so we use
    70. 

  70.   // a packed struct. That requires that we explicitly add padding between `.a`
    71. 

  71.   // and `.b`.
    72. 

  72.   var insert_padding: {.a: {.x: i32, .y: i32, .z: i32}, .b: ()*, .c: i32};
    73. 

  73.   G(&insert_padding.b);
    74. 

  74. }
    75. 

  75. 

  76. // CHECK:STDOUT: ; ModuleID = 'no_padding.carbon'
    77. 

  77. // CHECK:STDOUT: source_filename = "no_padding.carbon"
    78. 

  78. // CHECK:STDOUT:
    79. 

  79. // CHECK:STDOUT: declare void @_CG.Main(ptr)
    80. 

  80. // CHECK:STDOUT:
    81. 

  81. // CHECK:STDOUT: ; Function Attrs: nounwind
    82. 

  82. // CHECK:STDOUT: define void @_CF.Main() #0 !dbg !4 {
    83. 

  83. // CHECK:STDOUT: entry:
    84. 

  84. // CHECK:STDOUT:   %no_padding.var = alloca { i32, i32, i32 }, align 8, !dbg !7
    85. 

  85. // CHECK:STDOUT:   call void @llvm.lifetime.start.p0(ptr %no_padding.var), !dbg !7
    86. 

  86. // CHECK:STDOUT:   %.loc8.x = getelementptr inbounds nuw { i32, i32, i32 }, ptr %no_padding.var, i32 0, i32 0, !dbg !8
    87. 

  87. // CHECK:STDOUT:   call void @_CG.Main(ptr %.loc8.x), !dbg !9
    88. 

  88. // CHECK:STDOUT:   %.loc9.y = getelementptr inbounds nuw { i32, i32, i32 }, ptr %no_padding.var, i32 0, i32 1, !dbg !10
    89. 

  89. // CHECK:STDOUT:   call void @_CG.Main(ptr %.loc9.y), !dbg !11
    90. 

  90. // CHECK:STDOUT:   %.loc10.z = getelementptr inbounds nuw { i32, i32, i32 }, ptr %no_padding.var, i32 0, i32 2, !dbg !12
    91. 

  91. // CHECK:STDOUT:   call void @_CG.Main(ptr %.loc10.z), !dbg !13
    92. 

  92. // CHECK:STDOUT:   call void @"_COp.3124a28397dbe9e9:core.Destroy.Core"(ptr %no_padding.var), !dbg !7
    93. 

  93. // CHECK:STDOUT:   ret void, !dbg !14
    94. 

  94. // CHECK:STDOUT: }
    95. 

  95. // CHECK:STDOUT:
    96. 

  96. // CHECK:STDOUT: ; Function Attrs: nounwind
    97. 

  97. // CHECK:STDOUT: define weak_odr void @"_COp.7e389eab4a7e5487:core.Destroy.Core"(ptr %self) #0 !dbg !15 {
    98. 

  98. // CHECK:STDOUT: entry:
    99. 

  99. // CHECK:STDOUT:   ret void, !dbg !21
    100. 

  100. // CHECK:STDOUT: }
    101. 

  101. // CHECK:STDOUT:
    102. 

  102. // CHECK:STDOUT: ; Function Attrs: nounwind
    103. 

  103. // CHECK:STDOUT: define weak_odr void @"_COp.3124a28397dbe9e9:core.Destroy.Core"(ptr %self) #0 !dbg !22 {
    104. 

  104. // CHECK:STDOUT: entry:
    105. 

  105. // CHECK:STDOUT:   ret void, !dbg !28
    106. 

  106. // CHECK:STDOUT: }
    107. 

  107. // CHECK:STDOUT:
    108. 

  108. // CHECK:STDOUT: ; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
    109. 

  109. // CHECK:STDOUT: declare void @llvm.lifetime.start.p0(ptr captures(none)) #1
    110. 

  110. // CHECK:STDOUT:
    111. 

  111. // CHECK:STDOUT: attributes #0 = { nounwind }
    112. 

  112. // CHECK:STDOUT: attributes #1 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
    113. 

  113. // CHECK:STDOUT:
    114. 

  114. // CHECK:STDOUT: !llvm.module.flags = !{!0, !1}
    115. 

  115. // CHECK:STDOUT: !llvm.dbg.cu = !{!2}
    116. 

  116. // CHECK:STDOUT:
    117. 

  117. // CHECK:STDOUT: !0 = !{i32 7, !"Dwarf Version", i32 5}
    118. 

  118. // CHECK:STDOUT: !1 = !{i32 2, !"Debug Info Version", i32 3}
    119. 

  119. // CHECK:STDOUT: !2 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, file: !3, producer: "carbon", isOptimized: false, runtimeVersion: 0, emissionKind: FullDebug)
    120. 

  120. // CHECK:STDOUT: !3 = !DIFile(filename: "no_padding.carbon", directory: "")
    121. 

  121. // CHECK:STDOUT: !4 = distinct !DISubprogram(name: "F", linkageName: "_CF.Main", scope: null, file: !3, line: 5, type: !5, spFlags: DISPFlagDefinition, unit: !2)
    122. 

  122. // CHECK:STDOUT: !5 = !DISubroutineType(types: !6)
    123. 

  123. // CHECK:STDOUT: !6 = !{null}
    124. 

  124. // CHECK:STDOUT: !7 = !DILocation(line: 7, column: 3, scope: !4)
    125. 

  125. // CHECK:STDOUT: !8 = !DILocation(line: 8, column: 6, scope: !4)
    126. 

  126. // CHECK:STDOUT: !9 = !DILocation(line: 8, column: 3, scope: !4)
    127. 

  127. // CHECK:STDOUT: !10 = !DILocation(line: 9, column: 6, scope: !4)
    128. 

  128. // CHECK:STDOUT: !11 = !DILocation(line: 9, column: 3, scope: !4)
    129. 

  129. // CHECK:STDOUT: !12 = !DILocation(line: 10, column: 6, scope: !4)
    130. 

  130. // CHECK:STDOUT: !13 = !DILocation(line: 10, column: 3, scope: !4)
    131. 

  131. // CHECK:STDOUT: !14 = !DILocation(line: 5, column: 1, scope: !4)
    132. 

  132. // CHECK:STDOUT: !15 = distinct !DISubprogram(name: "Op", linkageName: "_COp.7e389eab4a7e5487:core.Destroy.Core", scope: null, file: !3, line: 7, type: !16, spFlags: DISPFlagDefinition, unit: !2, retainedNodes: !19)
    133. 

  133. // CHECK:STDOUT: !16 = !DISubroutineType(types: !17)
    134. 

  134. // CHECK:STDOUT: !17 = !{null, !18}
    135. 

  135. // CHECK:STDOUT: !18 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
    136. 

  136. // CHECK:STDOUT: !19 = !{!20}
    137. 

  137. // CHECK:STDOUT: !20 = !DILocalVariable(arg: 1, scope: !15, type: !18)
    138. 

  138. // CHECK:STDOUT: !21 = !DILocation(line: 7, column: 3, scope: !15)
    139. 

  139. // CHECK:STDOUT: !22 = distinct !DISubprogram(name: "Op", linkageName: "_COp.3124a28397dbe9e9:core.Destroy.Core", scope: null, file: !3, line: 7, type: !23, spFlags: DISPFlagDefinition, unit: !2, retainedNodes: !26)
    140. 

  140. // CHECK:STDOUT: !23 = !DISubroutineType(types: !24)
    141. 

  141. // CHECK:STDOUT: !24 = !{null, !25}
    142. 

  142. // CHECK:STDOUT: !25 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: null, size: 64)
    143. 

  143. // CHECK:STDOUT: !26 = !{!27}
    144. 

  144. // CHECK:STDOUT: !27 = !DILocalVariable(arg: 1, scope: !22, type: !25)
    145. 

  145. // CHECK:STDOUT: !28 = !DILocation(line: 7, column: 3, scope: !22)
    146. 

  146. // CHECK:STDOUT: ; ModuleID = 'avoid_tail_padding.carbon'
    147. 

  147. // CHECK:STDOUT: source_filename = "avoid_tail_padding.carbon"
    148. 

  148. // CHECK:STDOUT:
    149. 

  149. // CHECK:STDOUT: declare void @_CG.Main(ptr)
    150. 

  150. // CHECK:STDOUT:
    151. 

  151. // CHECK:STDOUT: ; Function Attrs: nounwind
    152. 

  152. // CHECK:STDOUT: define void @_CF.Main() #0 !dbg !4 {
    153. 

  153. // CHECK:STDOUT: entry:
    154. 

  154. // CHECK:STDOUT:   %avoid_tail_padding.var = alloca <{ ptr, i32 }>, align 8, !dbg !7
    155. 

  155. // CHECK:STDOUT:   call void @llvm.lifetime.start.p0(ptr %avoid_tail_padding.var), !dbg !7
    156. 

  156. // CHECK:STDOUT:   %.loc8.y = getelementptr inbounds nuw <{ ptr, i32 }>, ptr %avoid_tail_padding.var, i32 0, i32 1, !dbg !8
    157. 

  157. // CHECK:STDOUT:   call void @_CG.Main(ptr %.loc8.y), !dbg !9
    158. 

  158. // CHECK:STDOUT:   call void @"_COp.0d530a9b810c77a1:core.Destroy.Core"(ptr %avoid_tail_padding.var), !dbg !7
    159. 

  159. // CHECK:STDOUT:   ret void, !dbg !10
    160. 

  160. // CHECK:STDOUT: }
    161. 

  161. // CHECK:STDOUT:
    162. 

  162. // CHECK:STDOUT: ; Function Attrs: nounwind
    163. 

  163. // CHECK:STDOUT: define weak_odr void @"_COp.7e389eab4a7e5487:core.Destroy.Core"(ptr %self) #0 !dbg !11 {
    164. 

  164. // CHECK:STDOUT: entry:
    165. 

  165. // CHECK:STDOUT:   ret void, !dbg !17
    166. 

  166. // CHECK:STDOUT: }
    167. 

  167. // CHECK:STDOUT:
    168. 

  168. // CHECK:STDOUT: ; Function Attrs: nounwind
    169. 

  169. // CHECK:STDOUT: define weak_odr void @"_COp.0d530a9b810c77a1:core.Destroy.Core"(ptr %self) #0 !dbg !18 {
    170. 

  170. // CHECK:STDOUT: entry:
    171. 

  171. // CHECK:STDOUT:   ret void, !dbg !24
    172. 

  172. // CHECK:STDOUT: }
    173. 

  173. // CHECK:STDOUT:
    174. 

  174. // CHECK:STDOUT: ; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
    175. 

  175. // CHECK:STDOUT: declare void @llvm.lifetime.start.p0(ptr captures(none)) #1
    176. 

  176. // CHECK:STDOUT:
    177. 

  177. // CHECK:STDOUT: attributes #0 = { nounwind }
    178. 

  178. // CHECK:STDOUT: attributes #1 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
    179. 

  179. // CHECK:STDOUT:
    180. 

  180. // CHECK:STDOUT: !llvm.module.flags = !{!0, !1}
    181. 

  181. // CHECK:STDOUT: !llvm.dbg.cu = !{!2}
    182. 

  182. // CHECK:STDOUT:
    183. 

  183. // CHECK:STDOUT: !0 = !{i32 7, !"Dwarf Version", i32 5}
    184. 

  184. // CHECK:STDOUT: !1 = !{i32 2, !"Debug Info Version", i32 3}
    185. 

  185. // CHECK:STDOUT: !2 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, file: !3, producer: "carbon", isOptimized: false, runtimeVersion: 0, emissionKind: FullDebug)
    186. 

  186. // CHECK:STDOUT: !3 = !DIFile(filename: "avoid_tail_padding.carbon", directory: "")
    187. 

  187. // CHECK:STDOUT: !4 = distinct !DISubprogram(name: "F", linkageName: "_CF.Main", scope: null, file: !3, line: 5, type: !5, spFlags: DISPFlagDefinition, unit: !2)
    188. 

  188. // CHECK:STDOUT: !5 = !DISubroutineType(types: !6)
    189. 

  189. // CHECK:STDOUT: !6 = !{null}
    190. 

  190. // CHECK:STDOUT: !7 = !DILocation(line: 7, column: 3, scope: !4)
    191. 

  191. // CHECK:STDOUT: !8 = !DILocation(line: 8, column: 6, scope: !4)
    192. 

  192. // CHECK:STDOUT: !9 = !DILocation(line: 8, column: 3, scope: !4)
    193. 

  193. // CHECK:STDOUT: !10 = !DILocation(line: 5, column: 1, scope: !4)
    194. 

  194. // CHECK:STDOUT: !11 = distinct !DISubprogram(name: "Op", linkageName: "_COp.7e389eab4a7e5487:core.Destroy.Core", scope: null, file: !3, line: 7, type: !12, spFlags: DISPFlagDefinition, unit: !2, retainedNodes: !15)
    195. 

  195. // CHECK:STDOUT: !12 = !DISubroutineType(types: !13)
    196. 

  196. // CHECK:STDOUT: !13 = !{null, !14}
    197. 

  197. // CHECK:STDOUT: !14 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
    198. 

  198. // CHECK:STDOUT: !15 = !{!16}
    199. 

  199. // CHECK:STDOUT: !16 = !DILocalVariable(arg: 1, scope: !11, type: !14)
    200. 

  200. // CHECK:STDOUT: !17 = !DILocation(line: 7, column: 3, scope: !11)
    201. 

  201. // CHECK:STDOUT: !18 = distinct !DISubprogram(name: "Op", linkageName: "_COp.0d530a9b810c77a1:core.Destroy.Core", scope: null, file: !3, line: 7, type: !19, spFlags: DISPFlagDefinition, unit: !2, retainedNodes: !22)
    202. 

  202. // CHECK:STDOUT: !19 = !DISubroutineType(types: !20)
    203. 

  203. // CHECK:STDOUT: !20 = !{null, !21}
    204. 

  204. // CHECK:STDOUT: !21 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: null, size: 64)
    205. 

  205. // CHECK:STDOUT: !22 = !{!23}
    206. 

  206. // CHECK:STDOUT: !23 = !DILocalVariable(arg: 1, scope: !18, type: !21)
    207. 

  207. // CHECK:STDOUT: !24 = !DILocation(line: 7, column: 3, scope: !18)
    208. 

  208. // CHECK:STDOUT: ; ModuleID = 'use_tail_padding.carbon'
    209. 

  209. // CHECK:STDOUT: source_filename = "use_tail_padding.carbon"
    210. 

  210. // CHECK:STDOUT:
    211. 

  211. // CHECK:STDOUT: declare void @_CG.Main(ptr)
    212. 

  212. // CHECK:STDOUT:
    213. 

  213. // CHECK:STDOUT: ; Function Attrs: nounwind
    214. 

  214. // CHECK:STDOUT: define void @_CF.Main() #0 !dbg !4 {
    215. 

  215. // CHECK:STDOUT: entry:
    216. 

  216. // CHECK:STDOUT:   %use_tail_padding.var = alloca { <{ ptr, i32 }>, i32 }, align 8, !dbg !7
    217. 

  217. // CHECK:STDOUT:   call void @llvm.lifetime.start.p0(ptr %use_tail_padding.var), !dbg !7
    218. 

  218. // CHECK:STDOUT:   %.loc9_22.a = getelementptr inbounds nuw { <{ ptr, i32 }>, i32 }, ptr %use_tail_padding.var, i32 0, i32 0, !dbg !8
    219. 

  219. // CHECK:STDOUT:   %.loc9_24.y = getelementptr inbounds nuw <{ ptr, i32 }>, ptr %.loc9_22.a, i32 0, i32 1, !dbg !8
    220. 

  220. // CHECK:STDOUT:   call void @_CG.Main(ptr %.loc9_24.y), !dbg !9
    221. 

  221. // CHECK:STDOUT:   %.loc10.b = getelementptr inbounds nuw { <{ ptr, i32 }>, i32 }, ptr %use_tail_padding.var, i32 0, i32 1, !dbg !10
    222. 

  222. // CHECK:STDOUT:   call void @_CG.Main(ptr %.loc10.b), !dbg !11
    223. 

  223. // CHECK:STDOUT:   call void @"_COp.2106667af8a21f02:core.Destroy.Core"(ptr %use_tail_padding.var), !dbg !7
    224. 

  224. // CHECK:STDOUT:   ret void, !dbg !12
    225. 

  225. // CHECK:STDOUT: }
    226. 

  226. // CHECK:STDOUT:
    227. 

  227. // CHECK:STDOUT: ; Function Attrs: nounwind
    228. 

  228. // CHECK:STDOUT: define weak_odr void @"_COp.7e389eab4a7e5487:core.Destroy.Core"(ptr %self) #0 !dbg !13 {
    229. 

  229. // CHECK:STDOUT: entry:
    230. 

  230. // CHECK:STDOUT:   ret void, !dbg !19
    231. 

  231. // CHECK:STDOUT: }
    232. 

  232. // CHECK:STDOUT:
    233. 

  233. // CHECK:STDOUT: ; Function Attrs: nounwind
    234. 

  234. // CHECK:STDOUT: define weak_odr void @"_COp.0d530a9b810c77a1:core.Destroy.Core"(ptr %self) #0 !dbg !20 {
    235. 

  235. // CHECK:STDOUT: entry:
    236. 

  236. // CHECK:STDOUT:   ret void, !dbg !26
    237. 

  237. // CHECK:STDOUT: }
    238. 

  238. // CHECK:STDOUT:
    239. 

  239. // CHECK:STDOUT: ; Function Attrs: nounwind
    240. 

  240. // CHECK:STDOUT: define weak_odr void @"_COp.2106667af8a21f02:core.Destroy.Core"(ptr %self) #0 !dbg !27 {
    241. 

  241. // CHECK:STDOUT: entry:
    242. 

  242. // CHECK:STDOUT:   ret void, !dbg !30
    243. 

  243. // CHECK:STDOUT: }
    244. 

  244. // CHECK:STDOUT:
    245. 

  245. // CHECK:STDOUT: ; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
    246. 

  246. // CHECK:STDOUT: declare void @llvm.lifetime.start.p0(ptr captures(none)) #1
    247. 

  247. // CHECK:STDOUT:
    248. 

  248. // CHECK:STDOUT: attributes #0 = { nounwind }
    249. 

  249. // CHECK:STDOUT: attributes #1 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
    250. 

  250. // CHECK:STDOUT:
    251. 

  251. // CHECK:STDOUT: !llvm.module.flags = !{!0, !1}
    252. 

  252. // CHECK:STDOUT: !llvm.dbg.cu = !{!2}
    253. 

  253. // CHECK:STDOUT:
    254. 

  254. // CHECK:STDOUT: !0 = !{i32 7, !"Dwarf Version", i32 5}
    255. 

  255. // CHECK:STDOUT: !1 = !{i32 2, !"Debug Info Version", i32 3}
    256. 

  256. // CHECK:STDOUT: !2 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, file: !3, producer: "carbon", isOptimized: false, runtimeVersion: 0, emissionKind: FullDebug)
    257. 

  257. // CHECK:STDOUT: !3 = !DIFile(filename: "use_tail_padding.carbon", directory: "")
    258. 

  258. // CHECK:STDOUT: !4 = distinct !DISubprogram(name: "F", linkageName: "_CF.Main", scope: null, file: !3, line: 5, type: !5, spFlags: DISPFlagDefinition, unit: !2)
    259. 

  259. // CHECK:STDOUT: !5 = !DISubroutineType(types: !6)
    260. 

  260. // CHECK:STDOUT: !6 = !{null}
    261. 

  261. // CHECK:STDOUT: !7 = !DILocation(line: 8, column: 3, scope: !4)
    262. 

  262. // CHECK:STDOUT: !8 = !DILocation(line: 9, column: 6, scope: !4)
    263. 

  263. // CHECK:STDOUT: !9 = !DILocation(line: 9, column: 3, scope: !4)
    264. 

  264. // CHECK:STDOUT: !10 = !DILocation(line: 10, column: 6, scope: !4)
    265. 

  265. // CHECK:STDOUT: !11 = !DILocation(line: 10, column: 3, scope: !4)
    266. 

  266. // CHECK:STDOUT: !12 = !DILocation(line: 5, column: 1, scope: !4)
    267. 

  267. // CHECK:STDOUT: !13 = distinct !DISubprogram(name: "Op", linkageName: "_COp.7e389eab4a7e5487:core.Destroy.Core", scope: null, file: !3, line: 8, type: !14, spFlags: DISPFlagDefinition, unit: !2, retainedNodes: !17)
    268. 

  268. // CHECK:STDOUT: !14 = !DISubroutineType(types: !15)
    269. 

  269. // CHECK:STDOUT: !15 = !{null, !16}
    270. 

  270. // CHECK:STDOUT: !16 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
    271. 

  271. // CHECK:STDOUT: !17 = !{!18}
    272. 

  272. // CHECK:STDOUT: !18 = !DILocalVariable(arg: 1, scope: !13, type: !16)
    273. 

  273. // CHECK:STDOUT: !19 = !DILocation(line: 8, column: 3, scope: !13)
    274. 

  274. // CHECK:STDOUT: !20 = distinct !DISubprogram(name: "Op", linkageName: "_COp.0d530a9b810c77a1:core.Destroy.Core", scope: null, file: !3, line: 8, type: !21, spFlags: DISPFlagDefinition, unit: !2, retainedNodes: !24)
    275. 

  275. // CHECK:STDOUT: !21 = !DISubroutineType(types: !22)
    276. 

  276. // CHECK:STDOUT: !22 = !{null, !23}
    277. 

  277. // CHECK:STDOUT: !23 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: null, size: 64)
    278. 

  278. // CHECK:STDOUT: !24 = !{!25}
    279. 

  279. // CHECK:STDOUT: !25 = !DILocalVariable(arg: 1, scope: !20, type: !23)
    280. 

  280. // CHECK:STDOUT: !26 = !DILocation(line: 8, column: 3, scope: !20)
    281. 

  281. // CHECK:STDOUT: !27 = distinct !DISubprogram(name: "Op", linkageName: "_COp.2106667af8a21f02:core.Destroy.Core", scope: null, file: !3, line: 8, type: !21, spFlags: DISPFlagDefinition, unit: !2, retainedNodes: !28)
    282. 

  282. // CHECK:STDOUT: !28 = !{!29}
    283. 

  283. // CHECK:STDOUT: !29 = !DILocalVariable(arg: 1, scope: !27, type: !23)
    284. 

  284. // CHECK:STDOUT: !30 = !DILocation(line: 8, column: 3, scope: !27)
    285. 

  285. // CHECK:STDOUT: ; ModuleID = 'implicit_padding.carbon'
    286. 

  286. // CHECK:STDOUT: source_filename = "implicit_padding.carbon"
    287. 

  287. // CHECK:STDOUT:
    288. 

  288. // CHECK:STDOUT: declare void @_CG.Main(ptr)
    289. 

  289. // CHECK:STDOUT:
    290. 

  290. // CHECK:STDOUT: ; Function Attrs: nounwind
    291. 

  291. // CHECK:STDOUT: define void @_CF.Main() #0 !dbg !4 {
    292. 

  292. // CHECK:STDOUT: entry:
    293. 

  293. // CHECK:STDOUT:   %implicit_padding.var = alloca { <{ ptr, i32 }>, ptr }, align 8, !dbg !7
    294. 

  294. // CHECK:STDOUT:   call void @llvm.lifetime.start.p0(ptr %implicit_padding.var), !dbg !7
    295. 

  295. // CHECK:STDOUT:   %.loc9_22.a = getelementptr inbounds nuw { <{ ptr, i32 }>, ptr }, ptr %implicit_padding.var, i32 0, i32 0, !dbg !8
    296. 

  296. // CHECK:STDOUT:   %.loc9_24.x = getelementptr inbounds nuw <{ ptr, i32 }>, ptr %.loc9_22.a, i32 0, i32 0, !dbg !8
    297. 

  297. // CHECK:STDOUT:   call void @_CG.Main(ptr %.loc9_24.x), !dbg !9
    298. 

  298. // CHECK:STDOUT:   %.loc10.b = getelementptr inbounds nuw { <{ ptr, i32 }>, ptr }, ptr %implicit_padding.var, i32 0, i32 1, !dbg !10
    299. 

  299. // CHECK:STDOUT:   call void @_CG.Main(ptr %.loc10.b), !dbg !11
    300. 

  300. // CHECK:STDOUT:   call void @"_COp.a17d504d00302116:core.Destroy.Core"(ptr %implicit_padding.var), !dbg !7
    301. 

  301. // CHECK:STDOUT:   ret void, !dbg !12
    302. 

  302. // CHECK:STDOUT: }
    303. 

  303. // CHECK:STDOUT:
    304. 

  304. // CHECK:STDOUT: ; Function Attrs: nounwind
    305. 

  305. // CHECK:STDOUT: define weak_odr void @"_COp.7e389eab4a7e5487:core.Destroy.Core"(ptr %self) #0 !dbg !13 {
    306. 

  306. // CHECK:STDOUT: entry:
    307. 

  307. // CHECK:STDOUT:   ret void, !dbg !19
    308. 

  308. // CHECK:STDOUT: }
    309. 

  309. // CHECK:STDOUT:
    310. 

  310. // CHECK:STDOUT: ; Function Attrs: nounwind
    311. 

  311. // CHECK:STDOUT: define weak_odr void @"_COp.0d530a9b810c77a1:core.Destroy.Core"(ptr %self) #0 !dbg !20 {
    312. 

  312. // CHECK:STDOUT: entry:
    313. 

  313. // CHECK:STDOUT:   ret void, !dbg !26
    314. 

  314. // CHECK:STDOUT: }
    315. 

  315. // CHECK:STDOUT:
    316. 

  316. // CHECK:STDOUT: ; Function Attrs: nounwind
    317. 

  317. // CHECK:STDOUT: define weak_odr void @"_COp.a17d504d00302116:core.Destroy.Core"(ptr %self) #0 !dbg !27 {
    318. 

  318. // CHECK:STDOUT: entry:
    319. 

  319. // CHECK:STDOUT:   ret void, !dbg !30
    320. 

  320. // CHECK:STDOUT: }
    321. 

  321. // CHECK:STDOUT:
    322. 

  322. // CHECK:STDOUT: ; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
    323. 

  323. // CHECK:STDOUT: declare void @llvm.lifetime.start.p0(ptr captures(none)) #1
    324. 

  324. // CHECK:STDOUT:
    325. 

  325. // CHECK:STDOUT: attributes #0 = { nounwind }
    326. 

  326. // CHECK:STDOUT: attributes #1 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
    327. 

  327. // CHECK:STDOUT:
    328. 

  328. // CHECK:STDOUT: !llvm.module.flags = !{!0, !1}
    329. 

  329. // CHECK:STDOUT: !llvm.dbg.cu = !{!2}
    330. 

  330. // CHECK:STDOUT:
    331. 

  331. // CHECK:STDOUT: !0 = !{i32 7, !"Dwarf Version", i32 5}
    332. 

  332. // CHECK:STDOUT: !1 = !{i32 2, !"Debug Info Version", i32 3}
    333. 

  333. // CHECK:STDOUT: !2 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, file: !3, producer: "carbon", isOptimized: false, runtimeVersion: 0, emissionKind: FullDebug)
    334. 

  334. // CHECK:STDOUT: !3 = !DIFile(filename: "implicit_padding.carbon", directory: "")
    335. 

  335. // CHECK:STDOUT: !4 = distinct !DISubprogram(name: "F", linkageName: "_CF.Main", scope: null, file: !3, line: 5, type: !5, spFlags: DISPFlagDefinition, unit: !2)
    336. 

  336. // CHECK:STDOUT: !5 = !DISubroutineType(types: !6)
    337. 

  337. // CHECK:STDOUT: !6 = !{null}
    338. 

  338. // CHECK:STDOUT: !7 = !DILocation(line: 8, column: 3, scope: !4)
    339. 

  339. // CHECK:STDOUT: !8 = !DILocation(line: 9, column: 6, scope: !4)
    340. 

  340. // CHECK:STDOUT: !9 = !DILocation(line: 9, column: 3, scope: !4)
    341. 

  341. // CHECK:STDOUT: !10 = !DILocation(line: 10, column: 6, scope: !4)
    342. 

  342. // CHECK:STDOUT: !11 = !DILocation(line: 10, column: 3, scope: !4)
    343. 

  343. // CHECK:STDOUT: !12 = !DILocation(line: 5, column: 1, scope: !4)
    344. 

  344. // CHECK:STDOUT: !13 = distinct !DISubprogram(name: "Op", linkageName: "_COp.7e389eab4a7e5487:core.Destroy.Core", scope: null, file: !3, line: 8, type: !14, spFlags: DISPFlagDefinition, unit: !2, retainedNodes: !17)
    345. 

  345. // CHECK:STDOUT: !14 = !DISubroutineType(types: !15)
    346. 

  346. // CHECK:STDOUT: !15 = !{null, !16}
    347. 

  347. // CHECK:STDOUT: !16 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
    348. 

  348. // CHECK:STDOUT: !17 = !{!18}
    349. 

  349. // CHECK:STDOUT: !18 = !DILocalVariable(arg: 1, scope: !13, type: !16)
    350. 

  350. // CHECK:STDOUT: !19 = !DILocation(line: 8, column: 3, scope: !13)
    351. 

  351. // CHECK:STDOUT: !20 = distinct !DISubprogram(name: "Op", linkageName: "_COp.0d530a9b810c77a1:core.Destroy.Core", scope: null, file: !3, line: 8, type: !21, spFlags: DISPFlagDefinition, unit: !2, retainedNodes: !24)
    352. 

  352. // CHECK:STDOUT: !21 = !DISubroutineType(types: !22)
    353. 

  353. // CHECK:STDOUT: !22 = !{null, !23}
    354. 

  354. // CHECK:STDOUT: !23 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: null, size: 64)
    355. 

  355. // CHECK:STDOUT: !24 = !{!25}
    356. 

  356. // CHECK:STDOUT: !25 = !DILocalVariable(arg: 1, scope: !20, type: !23)
    357. 

  357. // CHECK:STDOUT: !26 = !DILocation(line: 8, column: 3, scope: !20)
    358. 

  358. // CHECK:STDOUT: !27 = distinct !DISubprogram(name: "Op", linkageName: "_COp.a17d504d00302116:core.Destroy.Core", scope: null, file: !3, line: 8, type: !21, spFlags: DISPFlagDefinition, unit: !2, retainedNodes: !28)
    359. 

  359. // CHECK:STDOUT: !28 = !{!29}
    360. 

  360. // CHECK:STDOUT: !29 = !DILocalVariable(arg: 1, scope: !27, type: !23)
    361. 

  361. // CHECK:STDOUT: !30 = !DILocation(line: 8, column: 3, scope: !27)
    362. 

  362. // CHECK:STDOUT: ; ModuleID = 'insert_padding.carbon'
    363. 

  363. // CHECK:STDOUT: source_filename = "insert_padding.carbon"
    364. 

  364. // CHECK:STDOUT:
    365. 

  365. // CHECK:STDOUT: declare void @_CG.Main(ptr)
    366. 

  366. // CHECK:STDOUT:
    367. 

  367. // CHECK:STDOUT: ; Function Attrs: nounwind
    368. 

  368. // CHECK:STDOUT: define void @_CF.Main() #0 !dbg !4 {
    369. 

  369. // CHECK:STDOUT: entry:
    370. 

  370. // CHECK:STDOUT:   %insert_padding.var = alloca <{ <{ { i32, i32, i32 }, [4 x i8] }>, ptr, i32 }>, align 8, !dbg !7
    371. 

  371. // CHECK:STDOUT:   call void @llvm.lifetime.start.p0(ptr %insert_padding.var), !dbg !7
    372. 

  372. // CHECK:STDOUT:   %.loc10.b = getelementptr inbounds nuw <{ <{ { i32, i32, i32 }, [4 x i8] }>, ptr, i32 }>, ptr %insert_padding.var, i32 0, i32 1, !dbg !8
    373. 

  373. // CHECK:STDOUT:   call void @_CG.Main(ptr %.loc10.b), !dbg !9
    374. 

  374. // CHECK:STDOUT:   call void @"_COp.ad98736f0dc6e810:core.Destroy.Core"(ptr %insert_padding.var), !dbg !7
    375. 

  375. // CHECK:STDOUT:   ret void, !dbg !10
    376. 

  376. // CHECK:STDOUT: }
    377. 

  377. // CHECK:STDOUT:
    378. 

  378. // CHECK:STDOUT: ; Function Attrs: nounwind
    379. 

  379. // CHECK:STDOUT: define weak_odr void @"_COp.7e389eab4a7e5487:core.Destroy.Core"(ptr %self) #0 !dbg !11 {
    380. 

  380. // CHECK:STDOUT: entry:
    381. 

  381. // CHECK:STDOUT:   ret void, !dbg !17
    382. 

  382. // CHECK:STDOUT: }
    383. 

  383. // CHECK:STDOUT:
    384. 

  384. // CHECK:STDOUT: ; Function Attrs: nounwind
    385. 

  385. // CHECK:STDOUT: define weak_odr void @"_COp.3124a28397dbe9e9:core.Destroy.Core"(ptr %self) #0 !dbg !18 {
    386. 

  386. // CHECK:STDOUT: entry:
    387. 

  387. // CHECK:STDOUT:   ret void, !dbg !24
    388. 

  388. // CHECK:STDOUT: }
    389. 

  389. // CHECK:STDOUT:
    390. 

  390. // CHECK:STDOUT: ; Function Attrs: nounwind
    391. 

  391. // CHECK:STDOUT: define weak_odr void @"_COp.ad98736f0dc6e810:core.Destroy.Core"(ptr %self) #0 !dbg !25 {
    392. 

  392. // CHECK:STDOUT: entry:
    393. 

  393. // CHECK:STDOUT:   ret void, !dbg !28
    394. 

  394. // CHECK:STDOUT: }
    395. 

  395. // CHECK:STDOUT:
    396. 

  396. // CHECK:STDOUT: ; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
    397. 

  397. // CHECK:STDOUT: declare void @llvm.lifetime.start.p0(ptr captures(none)) #1
    398. 

  398. // CHECK:STDOUT:
    399. 

  399. // CHECK:STDOUT: attributes #0 = { nounwind }
    400. 

  400. // CHECK:STDOUT: attributes #1 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
    401. 

  401. // CHECK:STDOUT:
    402. 

  402. // CHECK:STDOUT: !llvm.module.flags = !{!0, !1}
    403. 

  403. // CHECK:STDOUT: !llvm.dbg.cu = !{!2}
    404. 

  404. // CHECK:STDOUT:
    405. 

  405. // CHECK:STDOUT: !0 = !{i32 7, !"Dwarf Version", i32 5}
    406. 

  406. // CHECK:STDOUT: !1 = !{i32 2, !"Debug Info Version", i32 3}
    407. 

  407. // CHECK:STDOUT: !2 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, file: !3, producer: "carbon", isOptimized: false, runtimeVersion: 0, emissionKind: FullDebug)
    408. 

  408. // CHECK:STDOUT: !3 = !DIFile(filename: "insert_padding.carbon", directory: "")
    409. 

  409. // CHECK:STDOUT: !4 = distinct !DISubprogram(name: "F", linkageName: "_CF.Main", scope: null, file: !3, line: 5, type: !5, spFlags: DISPFlagDefinition, unit: !2)
    410. 

  410. // CHECK:STDOUT: !5 = !DISubroutineType(types: !6)
    411. 

  411. // CHECK:STDOUT: !6 = !{null}
    412. 

  412. // CHECK:STDOUT: !7 = !DILocation(line: 9, column: 3, scope: !4)
    413. 

  413. // CHECK:STDOUT: !8 = !DILocation(line: 10, column: 6, scope: !4)
    414. 

  414. // CHECK:STDOUT: !9 = !DILocation(line: 10, column: 3, scope: !4)
    415. 

  415. // CHECK:STDOUT: !10 = !DILocation(line: 5, column: 1, scope: !4)
    416. 

  416. // CHECK:STDOUT: !11 = distinct !DISubprogram(name: "Op", linkageName: "_COp.7e389eab4a7e5487:core.Destroy.Core", scope: null, file: !3, line: 9, type: !12, spFlags: DISPFlagDefinition, unit: !2, retainedNodes: !15)
    417. 

  417. // CHECK:STDOUT: !12 = !DISubroutineType(types: !13)
    418. 

  418. // CHECK:STDOUT: !13 = !{null, !14}
    419. 

  419. // CHECK:STDOUT: !14 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
    420. 

  420. // CHECK:STDOUT: !15 = !{!16}
    421. 

  421. // CHECK:STDOUT: !16 = !DILocalVariable(arg: 1, scope: !11, type: !14)
    422. 

  422. // CHECK:STDOUT: !17 = !DILocation(line: 9, column: 3, scope: !11)
    423. 

  423. // CHECK:STDOUT: !18 = distinct !DISubprogram(name: "Op", linkageName: "_COp.3124a28397dbe9e9:core.Destroy.Core", scope: null, file: !3, line: 9, type: !19, spFlags: DISPFlagDefinition, unit: !2, retainedNodes: !22)
    424. 

  424. // CHECK:STDOUT: !19 = !DISubroutineType(types: !20)
    425. 

  425. // CHECK:STDOUT: !20 = !{null, !21}
    426. 

  426. // CHECK:STDOUT: !21 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: null, size: 64)
    427. 

  427. // CHECK:STDOUT: !22 = !{!23}
    428. 

  428. // CHECK:STDOUT: !23 = !DILocalVariable(arg: 1, scope: !18, type: !21)
    429. 

  429. // CHECK:STDOUT: !24 = !DILocation(line: 9, column: 3, scope: !18)
    430. 

  430. // CHECK:STDOUT: !25 = distinct !DISubprogram(name: "Op", linkageName: "_COp.ad98736f0dc6e810:core.Destroy.Core", scope: null, file: !3, line: 9, type: !19, spFlags: DISPFlagDefinition, unit: !2, retainedNodes: !26)
    431. 

  431. // CHECK:STDOUT: !26 = !{!27}
    432. 

  432. // CHECK:STDOUT: !27 = !DILocalVariable(arg: 1, scope: !25, type: !21)
    433. 

  433. // CHECK:STDOUT: !28 = !DILocation(line: 9, column: 3, scope: !25)
    434.