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carbon-lang
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toolchain
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lower
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pointer
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pointer_to_pointer.carbon

pointer_to_pointer.carbon 3.9 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/pointer/pointer_to_pointer.carbon
    10. 

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

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

  12. 

  13. fn F(p: i32**) -> i32 {
    14. 

  14.   var _: i32** = p;
    15. 

  15.   var b: i32* = *p;
    16. 

  16.   var c: i32** = &b;
    17. 

  17.   return **c;
    18. 

  18. }
    19. 

  19. 

  20. // CHECK:STDOUT: ; ModuleID = 'pointer_to_pointer.carbon'
    21. 

  21. // CHECK:STDOUT: source_filename = "pointer_to_pointer.carbon"
    22. 

  22. // CHECK:STDOUT:
    23. 

  23. // CHECK:STDOUT: ; Function Attrs: nounwind
    24. 

  24. // CHECK:STDOUT: define i32 @_CF.Main(ptr %p) #0 !dbg !4 {
    25. 

  25. // CHECK:STDOUT: entry:
    26. 

  26. // CHECK:STDOUT:   %_.var = alloca ptr, align 8, !dbg !11
    27. 

  27. // CHECK:STDOUT:   %b.var = alloca ptr, align 8, !dbg !12
    28. 

  28. // CHECK:STDOUT:   %c.var = alloca ptr, align 8, !dbg !13
    29. 

  29. // CHECK:STDOUT:   call void @llvm.lifetime.start.p0(ptr %_.var), !dbg !11
    30. 

  30. // CHECK:STDOUT:   store ptr %p, ptr %_.var, align 8, !dbg !11
    31. 

  31. // CHECK:STDOUT:   call void @llvm.lifetime.start.p0(ptr %b.var), !dbg !12
    32. 

  32. // CHECK:STDOUT:   %.loc15_17.2 = load ptr, ptr %p, align 8, !dbg !14
    33. 

  33. // CHECK:STDOUT:   store ptr %.loc15_17.2, ptr %b.var, align 8, !dbg !12
    34. 

  34. // CHECK:STDOUT:   call void @llvm.lifetime.start.p0(ptr %c.var), !dbg !13
    35. 

  35. // CHECK:STDOUT:   store ptr %b.var, ptr %c.var, align 8, !dbg !13
    36. 

  36. // CHECK:STDOUT:   %.loc17_12 = load ptr, ptr %c.var, align 8, !dbg !15
    37. 

  37. // CHECK:STDOUT:   %.loc17_11.2 = load ptr, ptr %.loc17_12, align 8, !dbg !16
    38. 

  38. // CHECK:STDOUT:   %.loc17_10.2 = load i32, ptr %.loc17_11.2, align 4, !dbg !17
    39. 

  39. // CHECK:STDOUT:   ret i32 %.loc17_10.2, !dbg !18
    40. 

  40. // CHECK:STDOUT: }
    41. 

  41. // CHECK:STDOUT:
    42. 

  42. // CHECK:STDOUT: ; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
    43. 

  43. // CHECK:STDOUT: declare void @llvm.lifetime.start.p0(ptr captures(none)) #1
    44. 

  44. // CHECK:STDOUT:
    45. 

  45. // CHECK:STDOUT: ; uselistorder directives
    46. 

  46. // CHECK:STDOUT: uselistorder ptr @llvm.lifetime.start.p0, { 2, 1, 0 }
    47. 

  47. // CHECK:STDOUT:
    48. 

  48. // CHECK:STDOUT: attributes #0 = { nounwind }
    49. 

  49. // CHECK:STDOUT: attributes #1 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
    50. 

  50. // CHECK:STDOUT:
    51. 

  51. // CHECK:STDOUT: !llvm.module.flags = !{!0, !1}
    52. 

  52. // CHECK:STDOUT: !llvm.dbg.cu = !{!2}
    53. 

  53. // CHECK:STDOUT:
    54. 

  54. // CHECK:STDOUT: !0 = !{i32 7, !"Dwarf Version", i32 5}
    55. 

  55. // CHECK:STDOUT: !1 = !{i32 2, !"Debug Info Version", i32 3}
    56. 

  56. // CHECK:STDOUT: !2 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, file: !3, producer: "carbon", isOptimized: false, runtimeVersion: 0, emissionKind: FullDebug)
    57. 

  57. // CHECK:STDOUT: !3 = !DIFile(filename: "pointer_to_pointer.carbon", directory: "")
    58. 

  58. // CHECK:STDOUT: !4 = distinct !DISubprogram(name: "F", linkageName: "_CF.Main", scope: null, file: !3, line: 13, type: !5, spFlags: DISPFlagDefinition, unit: !2, retainedNodes: !9)
    59. 

  59. // CHECK:STDOUT: !5 = !DISubroutineType(types: !6)
    60. 

  60. // CHECK:STDOUT: !6 = !{!7, !8}
    61. 

  61. // CHECK:STDOUT: !7 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
    62. 

  62. // CHECK:STDOUT: !8 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: null, size: 8)
    63. 

  63. // CHECK:STDOUT: !9 = !{!10}
    64. 

  64. // CHECK:STDOUT: !10 = !DILocalVariable(arg: 1, scope: !4, type: !8)
    65. 

  65. // CHECK:STDOUT: !11 = !DILocation(line: 14, column: 3, scope: !4)
    66. 

  66. // CHECK:STDOUT: !12 = !DILocation(line: 15, column: 3, scope: !4)
    67. 

  67. // CHECK:STDOUT: !13 = !DILocation(line: 16, column: 3, scope: !4)
    68. 

  68. // CHECK:STDOUT: !14 = !DILocation(line: 15, column: 17, scope: !4)
    69. 

  69. // CHECK:STDOUT: !15 = !DILocation(line: 17, column: 12, scope: !4)
    70. 

  70. // CHECK:STDOUT: !16 = !DILocation(line: 17, column: 11, scope: !4)
    71. 

  71. // CHECK:STDOUT: !17 = !DILocation(line: 17, column: 10, scope: !4)
    72. 

  72. // CHECK:STDOUT: !18 = !DILocation(line: 17, column: 3, scope: !4)
    73.