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virtual_base.carbon

virtual_base.carbon 12 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/interop/cpp/virtual_base.carbon
    10. 

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

  11. // TIP:   bazel run //toolchain/testing:file_test -- --dump_output --file_tests=toolchain/lower/testdata/interop/cpp/virtual_base.carbon
    12. 

  12. 

  13. // --- diamond.h
    14. 

  14. 

  15. struct A {
    16. 

  16.   A();
    17. 

  17.   int a;
    18. 

  18. };
    19. 

  19. 

  20. struct B : virtual A {
    21. 

  21.   B();
    22. 

  22.   int b;
    23. 

  23. };
    24. 

  24. 

  25. struct C : virtual A {
    26. 

  26.   C();
    27. 

  27.   int c;
    28. 

  28. };
    29. 

  29. 

  30. struct D : B, C {
    31. 

  31.   int d;
    32. 

  32. };
    33. 

  33. 

  34. // Layout of D (x86_64):
    35. 

  35. //
    36. 

  36. // 0:  B | 0: vptr
    37. 

  37. // 8:    | 8: int B::b
    38. 

  38. // 12: (4 bytes padding)
    39. 

  39. // 16: C | 0: vptr
    40. 

  40. // 24:   | 8: int C::c
    41. 

  41. // 28: int D::d
    42. 

  42. // 32: A | 0: int A::a
    43. 

  43. // 36: (4 bytes padding)
    44. 

  44. // 40: (end of D)
    45. 

  45. 

  46. // --- use_diamond.carbon
    47. 

  47. 

  48. library "[[@TEST_NAME]]";
    49. 

  49. 

  50. import Cpp library "diamond.h";
    51. 

  51. 

  52. fn Make() {
    53. 

  53.   // This should construct a 40-byte object, using a construtor with a `...C1`
    54. 

  54.   // mangled name for D (a complete object constructor), which should call
    55. 

  55.   // constructors with `...C2` mangled names for A, B, and C (base subobject
    56. 

  56.   // constructors).
    57. 

  57.   var _: Cpp.D = Cpp.D.D();
    58. 

  58. }
    59. 

  59. 

  60. fn AccessD(d: Cpp.D) -> i32 {
    61. 

  61.   // This should read an i32 at offset 28.
    62. 

  62.   return d.d;
    63. 

  63. }
    64. 

  64. 

  65. // CHECK:STDOUT: ; ModuleID = 'use_diamond.carbon'
    66. 

  66. // CHECK:STDOUT: source_filename = "use_diamond.carbon"
    67. 

  67. // CHECK:STDOUT: target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-i128:128-f80:128-n8:16:32:64-S128"
    68. 

  68. // CHECK:STDOUT: target triple = "x86_64-unknown-linux-gnu"
    69. 

  69. // CHECK:STDOUT:
    70. 

  70. // CHECK:STDOUT: $_ZN1DC1Ev = comdat any
    71. 

  71. // CHECK:STDOUT:
    72. 

  72. // CHECK:STDOUT: $_ZTV1D = comdat any
    73. 

  73. // CHECK:STDOUT:
    74. 

  74. // CHECK:STDOUT: $_ZTT1D = comdat any
    75. 

  75. // CHECK:STDOUT:
    76. 

  76. // CHECK:STDOUT: $_ZTC1D0_1B = comdat any
    77. 

  77. // CHECK:STDOUT:
    78. 

  78. // CHECK:STDOUT: $_ZTI1B = comdat any
    79. 

  79. // CHECK:STDOUT:
    80. 

  80. // CHECK:STDOUT: $_ZTS1B = comdat any
    81. 

  81. // CHECK:STDOUT:
    82. 

  82. // CHECK:STDOUT: $_ZTI1A = comdat any
    83. 

  83. // CHECK:STDOUT:
    84. 

  84. // CHECK:STDOUT: $_ZTS1A = comdat any
    85. 

  85. // CHECK:STDOUT:
    86. 

  86. // CHECK:STDOUT: $_ZTC1D16_1C = comdat any
    87. 

  87. // CHECK:STDOUT:
    88. 

  88. // CHECK:STDOUT: $_ZTI1C = comdat any
    89. 

  89. // CHECK:STDOUT:
    90. 

  90. // CHECK:STDOUT: $_ZTS1C = comdat any
    91. 

  91. // CHECK:STDOUT:
    92. 

  92. // CHECK:STDOUT: $_ZTI1D = comdat any
    93. 

  93. // CHECK:STDOUT:
    94. 

  94. // CHECK:STDOUT: $_ZTS1D = comdat any
    95. 

  95. // CHECK:STDOUT:
    96. 

  96. // CHECK:STDOUT: @_ZTV1D = linkonce_odr dso_local unnamed_addr constant { [3 x ptr], [3 x ptr] } { [3 x ptr] [ptr inttoptr (i64 32 to ptr), ptr null, ptr @_ZTI1D], [3 x ptr] [ptr inttoptr (i64 16 to ptr), ptr inttoptr (i64 -16 to ptr), ptr @_ZTI1D] }, comdat, align 8
    97. 

  97. // CHECK:STDOUT: @_ZTT1D = linkonce_odr dso_local unnamed_addr constant [4 x ptr] [ptr getelementptr inbounds inrange(-24, 0) ({ [3 x ptr], [3 x ptr] }, ptr @_ZTV1D, i32 0, i32 0, i32 3), ptr getelementptr inbounds inrange(-24, 0) ({ [3 x ptr] }, ptr @_ZTC1D0_1B, i32 0, i32 0, i32 3), ptr getelementptr inbounds inrange(-24, 0) ({ [3 x ptr] }, ptr @_ZTC1D16_1C, i32 0, i32 0, i32 3), ptr getelementptr inbounds inrange(-24, 0) ({ [3 x ptr], [3 x ptr] }, ptr @_ZTV1D, i32 0, i32 1, i32 3)], comdat, align 8
    98. 

  98. // CHECK:STDOUT: @_ZTC1D0_1B = linkonce_odr dso_local unnamed_addr constant { [3 x ptr] } { [3 x ptr] [ptr inttoptr (i64 32 to ptr), ptr null, ptr @_ZTI1B] }, comdat, align 8
    99. 

  99. // CHECK:STDOUT: @_ZTI1B = linkonce_odr dso_local constant { ptr, ptr, i32, i32, ptr, i64 } { ptr getelementptr inbounds (ptr, ptr @_ZTVN10__cxxabiv121__vmi_class_type_infoE, i64 2), ptr @_ZTS1B, i32 0, i32 1, ptr @_ZTI1A, i64 -6141 }, comdat, align 8
    100. 

  100. // CHECK:STDOUT: @_ZTVN10__cxxabiv121__vmi_class_type_infoE = external global [0 x ptr]
    101. 

  101. // CHECK:STDOUT: @_ZTS1B = linkonce_odr dso_local constant [3 x i8] c"1B\00", comdat, align 1
    102. 

  102. // CHECK:STDOUT: @_ZTI1A = linkonce_odr dso_local constant { ptr, ptr } { ptr getelementptr inbounds (ptr, ptr @_ZTVN10__cxxabiv117__class_type_infoE, i64 2), ptr @_ZTS1A }, comdat, align 8
    103. 

  103. // CHECK:STDOUT: @_ZTVN10__cxxabiv117__class_type_infoE = external global [0 x ptr]
    104. 

  104. // CHECK:STDOUT: @_ZTS1A = linkonce_odr dso_local constant [3 x i8] c"1A\00", comdat, align 1
    105. 

  105. // CHECK:STDOUT: @_ZTC1D16_1C = linkonce_odr dso_local unnamed_addr constant { [3 x ptr] } { [3 x ptr] [ptr inttoptr (i64 16 to ptr), ptr null, ptr @_ZTI1C] }, comdat, align 8
    106. 

  106. // CHECK:STDOUT: @_ZTI1C = linkonce_odr dso_local constant { ptr, ptr, i32, i32, ptr, i64 } { ptr getelementptr inbounds (ptr, ptr @_ZTVN10__cxxabiv121__vmi_class_type_infoE, i64 2), ptr @_ZTS1C, i32 0, i32 1, ptr @_ZTI1A, i64 -6141 }, comdat, align 8
    107. 

  107. // CHECK:STDOUT: @_ZTS1C = linkonce_odr dso_local constant [3 x i8] c"1C\00", comdat, align 1
    108. 

  108. // CHECK:STDOUT: @_ZTI1D = linkonce_odr dso_local constant { ptr, ptr, i32, i32, ptr, i64, ptr, i64 } { ptr getelementptr inbounds (ptr, ptr @_ZTVN10__cxxabiv121__vmi_class_type_infoE, i64 2), ptr @_ZTS1D, i32 2, i32 2, ptr @_ZTI1B, i64 2, ptr @_ZTI1C, i64 4098 }, comdat, align 8
    109. 

  109. // CHECK:STDOUT: @_ZTS1D = linkonce_odr dso_local constant [3 x i8] c"1D\00", comdat, align 1
    110. 

  110. // CHECK:STDOUT:
    111. 

  111. // CHECK:STDOUT: ; Function Attrs: alwaysinline mustprogress uwtable
    112. 

  112. // CHECK:STDOUT: define dso_local void @_ZN1DC1Ev.carbon_thunk(ptr noundef %return) #0 {
    113. 

  113. // CHECK:STDOUT: entry:
    114. 

  114. // CHECK:STDOUT:   %return.addr = alloca ptr, align 8
    115. 

  115. // CHECK:STDOUT:   store ptr %return, ptr %return.addr, align 8, !tbaa !12
    116. 

  116. // CHECK:STDOUT:   %0 = load ptr, ptr %return.addr, align 8, !tbaa !12
    117. 

  117. // CHECK:STDOUT:   call void @_ZN1DC1Ev(ptr noundef nonnull align 8 dereferenceable(32) %0)
    118. 

  118. // CHECK:STDOUT:   ret void
    119. 

  119. // CHECK:STDOUT: }
    120. 

  120. // CHECK:STDOUT:
    121. 

  121. // CHECK:STDOUT: ; Function Attrs: inlinehint mustprogress uwtable
    122. 

  122. // CHECK:STDOUT: define linkonce_odr dso_local void @_ZN1DC1Ev(ptr noundef nonnull align 8 dereferenceable(32) %this) unnamed_addr #1 comdat align 2 {
    123. 

  123. // CHECK:STDOUT: entry:
    124. 

  124. // CHECK:STDOUT:   %this.addr = alloca ptr, align 8
    125. 

  125. // CHECK:STDOUT:   store ptr %this, ptr %this.addr, align 8, !tbaa !12
    126. 

  126. // CHECK:STDOUT:   %this1 = load ptr, ptr %this.addr, align 8
    127. 

  127. // CHECK:STDOUT:   %0 = getelementptr inbounds i8, ptr %this1, i64 32
    128. 

  128. // CHECK:STDOUT:   call void @_ZN1AC2Ev(ptr noundef nonnull align 4 dereferenceable(4) %0)
    129. 

  129. // CHECK:STDOUT:   call void @_ZN1BC2Ev(ptr noundef nonnull align 8 dereferenceable(12) %this1, ptr noundef getelementptr inbounds (ptr, ptr @_ZTT1D, i64 1))
    130. 

  130. // CHECK:STDOUT:   %1 = getelementptr inbounds i8, ptr %this1, i64 16
    131. 

  131. // CHECK:STDOUT:   call void @_ZN1CC2Ev(ptr noundef nonnull align 8 dereferenceable(12) %1, ptr noundef getelementptr inbounds (ptr, ptr @_ZTT1D, i64 2))
    132. 

  132. // CHECK:STDOUT:   store ptr getelementptr inbounds inrange(-24, 0) ({ [3 x ptr], [3 x ptr] }, ptr @_ZTV1D, i32 0, i32 0, i32 3), ptr %this1, align 8, !tbaa !15
    133. 

  133. // CHECK:STDOUT:   %add.ptr = getelementptr inbounds i8, ptr %this1, i64 16
    134. 

  134. // CHECK:STDOUT:   store ptr getelementptr inbounds inrange(-24, 0) ({ [3 x ptr], [3 x ptr] }, ptr @_ZTV1D, i32 0, i32 1, i32 3), ptr %add.ptr, align 8, !tbaa !15
    135. 

  135. // CHECK:STDOUT:   ret void
    136. 

  136. // CHECK:STDOUT: }
    137. 

  137. // CHECK:STDOUT:
    138. 

  138. // CHECK:STDOUT: ; Function Attrs: nounwind
    139. 

  139. // CHECK:STDOUT: define void @_CMake.Main() #2 !dbg !17 {
    140. 

  140. // CHECK:STDOUT: entry:
    141. 

  141. // CHECK:STDOUT:   %_.var = alloca [40 x i8], align 1, !dbg !20
    142. 

  142. // CHECK:STDOUT:   call void @llvm.lifetime.start.p0(ptr %_.var), !dbg !20
    143. 

  143. // CHECK:STDOUT:   call void @_ZN1DC1Ev.carbon_thunk(ptr %_.var), !dbg !21
    144. 

  144. // CHECK:STDOUT:   ret void, !dbg !22
    145. 

  145. // CHECK:STDOUT: }
    146. 

  146. // CHECK:STDOUT:
    147. 

  147. // CHECK:STDOUT: ; Function Attrs: nounwind
    148. 

  148. // CHECK:STDOUT: define i32 @_CAccessD.Main(ptr %d) #2 !dbg !23 {
    149. 

  149. // CHECK:STDOUT: entry:
    150. 

  150. // CHECK:STDOUT:   %.loc16_11.1.d = getelementptr inbounds nuw [40 x i8], ptr %d, i32 0, i32 28, !dbg !30
    151. 

  151. // CHECK:STDOUT:   %.loc16_11.2 = load i32, ptr %.loc16_11.1.d, align 4, !dbg !30
    152. 

  152. // CHECK:STDOUT:   ret i32 %.loc16_11.2, !dbg !31
    153. 

  153. // CHECK:STDOUT: }
    154. 

  154. // CHECK:STDOUT:
    155. 

  155. // CHECK:STDOUT: ; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
    156. 

  156. // CHECK:STDOUT: declare void @llvm.lifetime.start.p0(ptr captures(none)) #3
    157. 

  157. // CHECK:STDOUT:
    158. 

  158. // CHECK:STDOUT: declare void @_ZN1AC2Ev(ptr noundef nonnull align 4 dereferenceable(4)) unnamed_addr #4
    159. 

  159. // CHECK:STDOUT:
    160. 

  160. // CHECK:STDOUT: declare void @_ZN1BC2Ev(ptr noundef nonnull align 8 dereferenceable(12), ptr noundef) unnamed_addr #4
    161. 

  161. // CHECK:STDOUT:
    162. 

  162. // CHECK:STDOUT: declare void @_ZN1CC2Ev(ptr noundef nonnull align 8 dereferenceable(12), ptr noundef) unnamed_addr #4
    163. 

  163. // CHECK:STDOUT:
    164. 

  164. // CHECK:STDOUT: ; uselistorder directives
    165. 

  165. // CHECK:STDOUT: uselistorder ptr inttoptr (i64 32 to ptr), { 1, 0 }
    166. 

  166. // CHECK:STDOUT: uselistorder ptr inttoptr (i64 16 to ptr), { 1, 0 }
    167. 

  167. // CHECK:STDOUT: uselistorder ptr getelementptr inbounds inrange(-24, 0) ({ [3 x ptr], [3 x ptr] }, ptr @_ZTV1D, i32 0, i32 0, i32 3), { 1, 0 }
    168. 

  168. // CHECK:STDOUT: uselistorder ptr getelementptr inbounds inrange(-24, 0) ({ [3 x ptr], [3 x ptr] }, ptr @_ZTV1D, i32 0, i32 1, i32 3), { 1, 0 }
    169. 

  169. // CHECK:STDOUT: uselistorder ptr @_ZTI1D, { 1, 0 }
    170. 

  170. // CHECK:STDOUT:
    171. 

  171. // CHECK:STDOUT: attributes #0 = { alwaysinline mustprogress uwtable "min-legal-vector-width"="0" "no-trapping-math"="true" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+cmov,+cx8,+fxsr,+mmx,+sse,+sse2,+x87" "tune-cpu"="generic" }
    172. 

  172. // CHECK:STDOUT: attributes #1 = { inlinehint mustprogress uwtable "min-legal-vector-width"="0" "no-trapping-math"="true" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+cmov,+cx8,+fxsr,+mmx,+sse,+sse2,+x87" "tune-cpu"="generic" }
    173. 

  173. // CHECK:STDOUT: attributes #2 = { nounwind }
    174. 

  174. // CHECK:STDOUT: attributes #3 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
    175. 

  175. // CHECK:STDOUT: attributes #4 = { "no-trapping-math"="true" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+cmov,+cx8,+fxsr,+mmx,+sse,+sse2,+x87" "tune-cpu"="generic" }
    176. 

  176. // CHECK:STDOUT:
    177. 

  177. // CHECK:STDOUT: !llvm.module.flags = !{!0, !1, !2, !3, !4, !5}
    178. 

  178. // CHECK:STDOUT: !llvm.dbg.cu = !{!6}
    179. 

  179. // CHECK:STDOUT: !llvm.errno.tbaa = !{!8}
    180. 

  180. // CHECK:STDOUT:
    181. 

  181. // CHECK:STDOUT: !0 = !{i32 7, !"Dwarf Version", i32 5}
    182. 

  182. // CHECK:STDOUT: !1 = !{i32 2, !"Debug Info Version", i32 3}
    183. 

  183. // CHECK:STDOUT: !2 = !{i32 1, !"wchar_size", i32 4}
    184. 

  184. // CHECK:STDOUT: !3 = !{i32 8, !"PIC Level", i32 2}
    185. 

  185. // CHECK:STDOUT: !4 = !{i32 7, !"PIE Level", i32 2}
    186. 

  186. // CHECK:STDOUT: !5 = !{i32 7, !"uwtable", i32 2}
    187. 

  187. // CHECK:STDOUT: !6 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, file: !7, producer: "carbon", isOptimized: false, runtimeVersion: 0, emissionKind: FullDebug)
    188. 

  188. // CHECK:STDOUT: !7 = !DIFile(filename: "use_diamond.carbon", directory: "")
    189. 

  189. // CHECK:STDOUT: !8 = !{!9, !9, i64 0}
    190. 

  190. // CHECK:STDOUT: !9 = !{!"int", !10, i64 0}
    191. 

  191. // CHECK:STDOUT: !10 = !{!"omnipotent char", !11, i64 0}
    192. 

  192. // CHECK:STDOUT: !11 = !{!"Simple C++ TBAA"}
    193. 

  193. // CHECK:STDOUT: !12 = !{!13, !13, i64 0}
    194. 

  194. // CHECK:STDOUT: !13 = !{!"p1 _ZTS1D", !14, i64 0}
    195. 

  195. // CHECK:STDOUT: !14 = !{!"any pointer", !10, i64 0}
    196. 

  196. // CHECK:STDOUT: !15 = !{!16, !16, i64 0}
    197. 

  197. // CHECK:STDOUT: !16 = !{!"vtable pointer", !11, i64 0}
    198. 

  198. // CHECK:STDOUT: !17 = distinct !DISubprogram(name: "Make", linkageName: "_CMake.Main", scope: null, file: !7, line: 6, type: !18, spFlags: DISPFlagDefinition, unit: !6)
    199. 

  199. // CHECK:STDOUT: !18 = !DISubroutineType(types: !19)
    200. 

  200. // CHECK:STDOUT: !19 = !{null}
    201. 

  201. // CHECK:STDOUT: !20 = !DILocation(line: 11, column: 3, scope: !17)
    202. 

  202. // CHECK:STDOUT: !21 = !DILocation(line: 11, column: 18, scope: !17)
    203. 

  203. // CHECK:STDOUT: !22 = !DILocation(line: 6, column: 1, scope: !17)
    204. 

  204. // CHECK:STDOUT: !23 = distinct !DISubprogram(name: "AccessD", linkageName: "_CAccessD.Main", scope: null, file: !7, line: 14, type: !24, spFlags: DISPFlagDefinition, unit: !6, retainedNodes: !28)
    205. 

  205. // CHECK:STDOUT: !24 = !DISubroutineType(types: !25)
    206. 

  206. // CHECK:STDOUT: !25 = !{!26, !27}
    207. 

  207. // CHECK:STDOUT: !26 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
    208. 

  208. // CHECK:STDOUT: !27 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: null, size: 8)
    209. 

  209. // CHECK:STDOUT: !28 = !{!29}
    210. 

  210. // CHECK:STDOUT: !29 = !DILocalVariable(arg: 1, scope: !23, type: !27)
    211. 

  211. // CHECK:STDOUT: !30 = !DILocation(line: 16, column: 10, scope: !23)
    212. 

  212. // CHECK:STDOUT: !31 = !DILocation(line: 16, column: 3, scope: !23)
    213.