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call_recursive_diamond.carbon

call_recursive_diamond.carbon 23 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. // AUTOUPDATE
    6. 

  6. // TIP: To test this file alone, run:
    7. 

  7. // TIP:   bazel test //toolchain/testing:file_test --test_arg=--file_tests=toolchain/lower/testdata/function/generic/call_recursive_diamond.carbon
    8. 

  8. // TIP: To dump output, run:
    9. 

  9. // TIP:   bazel run //toolchain/testing:file_test -- --dump_output --file_tests=toolchain/lower/testdata/function/generic/call_recursive_diamond.carbon
    10. 

  10. 

  11. import Core library "io";
    12. 

  12. fn A[T:! type](x: T, count: i32) -> T;
    13. 

  13. fn B[T:! type](x: T, count: i32) -> T;
    14. 

  14. fn C[T:! type](x: T, count: i32) -> T;
    15. 

  15. fn D[T:! type](x: T, count: i32) -> T;
    16. 

  16. 

  17. // Builds on `call_recursive_mutual.carbon`. The two specifics for each of:
    18. 

  18. // A, B, C, D with a pointer type could be deduplicated.
    19. 

  19. fn A[T:! type](x: T, count: i32) -> T {
    20. 

  20.   if (count > 4) {
    21. 

  21.     return x;
    22. 

  22.   }
    23. 

  23.   if (count % 2 == 0) {
    24. 

  24.     return B(x, count);
    25. 

  25.   } else {
    26. 

  26.     return C(x, count);
    27. 

  27.   }
    28. 

  28. }
    29. 

  29. 

  30. // B and C are not equivalent in the diamond: different generics and different function bodies.
    31. 

  31. fn B[T:! type](x: T, count: i32) -> T {
    32. 

  32.   Core.Print(1);
    33. 

  33.   return D(x, count);
    34. 

  34. }
    35. 

  35. 

  36. fn C[T:! type](x: T, count: i32) -> T {
    37. 

  37.   Core.Print(2);
    38. 

  38.   return D(x, count);
    39. 

  39. }
    40. 

  40. 

  41. fn D[T:! type](x: T, count: i32) -> T {
    42. 

  42.   return A(x, count + 1);
    43. 

  43. }
    44. 

  44. 

  45. fn M() {
    46. 

  46.   var n: i32 = 0;
    47. 

  47.   var m: f64 = 1.0;
    48. 

  48.   var ptr_i32 : i32*;
    49. 

  49.   var ptr_f64 : f64*;
    50. 

  50. 

  51.   A(n, 0);
    52. 

  52.   A(m, 0);
    53. 

  53.   A(ptr_i32, 0);
    54. 

  54.   A(ptr_f64, 0);
    55. 

  55. }
    56. 

  56. 

  57. // CHECK:STDOUT: ; ModuleID = 'call_recursive_diamond.carbon'
    58. 

  58. // CHECK:STDOUT: source_filename = "call_recursive_diamond.carbon"
    59. 

  59. // CHECK:STDOUT:
    60. 

  60. // CHECK:STDOUT: @printf.int.format = private unnamed_addr constant [4 x i8] c"%d\0A\00", align 1
    61. 

  61. // CHECK:STDOUT:
    62. 

  62. // CHECK:STDOUT: define void @_CM.Main() !dbg !4 {
    63. 

  63. // CHECK:STDOUT: entry:
    64. 

  64. // CHECK:STDOUT:   %n.var = alloca i32, align 4, !dbg !7
    65. 

  65. // CHECK:STDOUT:   %m.var = alloca double, align 8, !dbg !8
    66. 

  66. // CHECK:STDOUT:   %ptr_i32.var = alloca ptr, align 8, !dbg !9
    67. 

  67. // CHECK:STDOUT:   %ptr_f64.var = alloca ptr, align 8, !dbg !10
    68. 

  68. // CHECK:STDOUT:   call void @llvm.lifetime.start.p0(i64 4, ptr %n.var), !dbg !7
    69. 

  69. // CHECK:STDOUT:   store i32 0, ptr %n.var, align 4, !dbg !7
    70. 

  70. // CHECK:STDOUT:   call void @llvm.lifetime.start.p0(i64 8, ptr %m.var), !dbg !8
    71. 

  71. // CHECK:STDOUT:   store double 1.000000e+00, ptr %m.var, align 8, !dbg !8
    72. 

  72. // CHECK:STDOUT:   call void @llvm.lifetime.start.p0(i64 8, ptr %ptr_i32.var), !dbg !9
    73. 

  73. // CHECK:STDOUT:   call void @llvm.lifetime.start.p0(i64 8, ptr %ptr_f64.var), !dbg !10
    74. 

  74. // CHECK:STDOUT:   %.loc51_5 = load i32, ptr %n.var, align 4, !dbg !11
    75. 

  75. // CHECK:STDOUT:   %A.call.loc51 = call i32 @_CA.Main.b88d1103f417c6d4(i32 %.loc51_5, i32 0), !dbg !12
    76. 

  76. // CHECK:STDOUT:   %.loc52_5 = load double, ptr %m.var, align 8, !dbg !13
    77. 

  77. // CHECK:STDOUT:   %A.call.loc52 = call double @_CA.Main.66be507887ceee78(double %.loc52_5, i32 0), !dbg !14
    78. 

  78. // CHECK:STDOUT:   %.loc53_5 = load ptr, ptr %ptr_i32.var, align 8, !dbg !15
    79. 

  79. // CHECK:STDOUT:   %A.call.loc53 = call ptr @_CA.Main.e8193710fd35b608(ptr %.loc53_5, i32 0), !dbg !16
    80. 

  80. // CHECK:STDOUT:   %.loc54_5 = load ptr, ptr %ptr_f64.var, align 8, !dbg !17
    81. 

  81. // CHECK:STDOUT:   %A.call.loc54 = call ptr @_CA.Main.04bf2edaaa84aa22(ptr %.loc54_5, i32 0), !dbg !18
    82. 

  82. // CHECK:STDOUT:   ret void, !dbg !19
    83. 

  83. // CHECK:STDOUT: }
    84. 

  84. // CHECK:STDOUT:
    85. 

  85. // CHECK:STDOUT: ; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
    86. 

  86. // CHECK:STDOUT: declare void @llvm.lifetime.start.p0(i64 immarg, ptr captures(none)) #0
    87. 

  87. // CHECK:STDOUT:
    88. 

  88. // CHECK:STDOUT: define i32 @_CA.Main.b88d1103f417c6d4(i32 %x, i32 %count) !dbg !20 {
    89. 

  89. // CHECK:STDOUT: entry:
    90. 

  90. // CHECK:STDOUT:   %int.greater = icmp sgt i32 %count, 4, !dbg !21
    91. 

  91. // CHECK:STDOUT:   br i1 %int.greater, label %if.then.loc20, label %if.else.loc20, !dbg !22
    92. 

  92. // CHECK:STDOUT:
    93. 

  93. // CHECK:STDOUT: if.then.loc20:                                    ; preds = %entry
    94. 

  94. // CHECK:STDOUT:   ret i32 %x, !dbg !23
    95. 

  95. // CHECK:STDOUT:
    96. 

  96. // CHECK:STDOUT: if.else.loc20:                                    ; preds = %entry
    97. 

  97. // CHECK:STDOUT:   %int.smod = srem i32 %count, 2, !dbg !24
    98. 

  98. // CHECK:STDOUT:   %int.eq = icmp eq i32 %int.smod, 0, !dbg !24
    99. 

  99. // CHECK:STDOUT:   br i1 %int.eq, label %if.then.loc23, label %if.else.loc23, !dbg !25
    100. 

  100. // CHECK:STDOUT:
    101. 

  101. // CHECK:STDOUT: if.then.loc23:                                    ; preds = %if.else.loc20
    102. 

  102. // CHECK:STDOUT:   %B.call = call i32 @_CB.Main.b88d1103f417c6d4(i32 %x, i32 %count), !dbg !26
    103. 

  103. // CHECK:STDOUT:   ret i32 %B.call, !dbg !27
    104. 

  104. // CHECK:STDOUT:
    105. 

  105. // CHECK:STDOUT: if.else.loc23:                                    ; preds = %if.else.loc20
    106. 

  106. // CHECK:STDOUT:   %C.call = call i32 @_CC.Main.b88d1103f417c6d4(i32 %x, i32 %count), !dbg !28
    107. 

  107. // CHECK:STDOUT:   ret i32 %C.call, !dbg !29
    108. 

  108. // CHECK:STDOUT: }
    109. 

  109. // CHECK:STDOUT:
    110. 

  110. // CHECK:STDOUT: define double @_CA.Main.66be507887ceee78(double %x, i32 %count) !dbg !30 {
    111. 

  111. // CHECK:STDOUT: entry:
    112. 

  112. // CHECK:STDOUT:   %int.greater = icmp sgt i32 %count, 4, !dbg !31
    113. 

  113. // CHECK:STDOUT:   br i1 %int.greater, label %if.then.loc20, label %if.else.loc20, !dbg !32
    114. 

  114. // CHECK:STDOUT:
    115. 

  115. // CHECK:STDOUT: if.then.loc20:                                    ; preds = %entry
    116. 

  116. // CHECK:STDOUT:   ret double %x, !dbg !33
    117. 

  117. // CHECK:STDOUT:
    118. 

  118. // CHECK:STDOUT: if.else.loc20:                                    ; preds = %entry
    119. 

  119. // CHECK:STDOUT:   %int.smod = srem i32 %count, 2, !dbg !34
    120. 

  120. // CHECK:STDOUT:   %int.eq = icmp eq i32 %int.smod, 0, !dbg !34
    121. 

  121. // CHECK:STDOUT:   br i1 %int.eq, label %if.then.loc23, label %if.else.loc23, !dbg !35
    122. 

  122. // CHECK:STDOUT:
    123. 

  123. // CHECK:STDOUT: if.then.loc23:                                    ; preds = %if.else.loc20
    124. 

  124. // CHECK:STDOUT:   %B.call = call double @_CB.Main.66be507887ceee78(double %x, i32 %count), !dbg !36
    125. 

  125. // CHECK:STDOUT:   ret double %B.call, !dbg !37
    126. 

  126. // CHECK:STDOUT:
    127. 

  127. // CHECK:STDOUT: if.else.loc23:                                    ; preds = %if.else.loc20
    128. 

  128. // CHECK:STDOUT:   %C.call = call double @_CC.Main.66be507887ceee78(double %x, i32 %count), !dbg !38
    129. 

  129. // CHECK:STDOUT:   ret double %C.call, !dbg !39
    130. 

  130. // CHECK:STDOUT: }
    131. 

  131. // CHECK:STDOUT:
    132. 

  132. // CHECK:STDOUT: define ptr @_CA.Main.e8193710fd35b608(ptr %x, i32 %count) !dbg !40 {
    133. 

  133. // CHECK:STDOUT: entry:
    134. 

  134. // CHECK:STDOUT:   %int.greater = icmp sgt i32 %count, 4, !dbg !41
    135. 

  135. // CHECK:STDOUT:   br i1 %int.greater, label %if.then.loc20, label %if.else.loc20, !dbg !42
    136. 

  136. // CHECK:STDOUT:
    137. 

  137. // CHECK:STDOUT: if.then.loc20:                                    ; preds = %entry
    138. 

  138. // CHECK:STDOUT:   ret ptr %x, !dbg !43
    139. 

  139. // CHECK:STDOUT:
    140. 

  140. // CHECK:STDOUT: if.else.loc20:                                    ; preds = %entry
    141. 

  141. // CHECK:STDOUT:   %int.smod = srem i32 %count, 2, !dbg !44
    142. 

  142. // CHECK:STDOUT:   %int.eq = icmp eq i32 %int.smod, 0, !dbg !44
    143. 

  143. // CHECK:STDOUT:   br i1 %int.eq, label %if.then.loc23, label %if.else.loc23, !dbg !45
    144. 

  144. // CHECK:STDOUT:
    145. 

  145. // CHECK:STDOUT: if.then.loc23:                                    ; preds = %if.else.loc20
    146. 

  146. // CHECK:STDOUT:   %B.call = call ptr @_CB.Main.e8193710fd35b608(ptr %x, i32 %count), !dbg !46
    147. 

  147. // CHECK:STDOUT:   ret ptr %B.call, !dbg !47
    148. 

  148. // CHECK:STDOUT:
    149. 

  149. // CHECK:STDOUT: if.else.loc23:                                    ; preds = %if.else.loc20
    150. 

  150. // CHECK:STDOUT:   %C.call = call ptr @_CC.Main.e8193710fd35b608(ptr %x, i32 %count), !dbg !48
    151. 

  151. // CHECK:STDOUT:   ret ptr %C.call, !dbg !49
    152. 

  152. // CHECK:STDOUT: }
    153. 

  153. // CHECK:STDOUT:
    154. 

  154. // CHECK:STDOUT: define ptr @_CA.Main.04bf2edaaa84aa22(ptr %x, i32 %count) !dbg !50 {
    155. 

  155. // CHECK:STDOUT: entry:
    156. 

  156. // CHECK:STDOUT:   %int.greater = icmp sgt i32 %count, 4, !dbg !51
    157. 

  157. // CHECK:STDOUT:   br i1 %int.greater, label %if.then.loc20, label %if.else.loc20, !dbg !52
    158. 

  158. // CHECK:STDOUT:
    159. 

  159. // CHECK:STDOUT: if.then.loc20:                                    ; preds = %entry
    160. 

  160. // CHECK:STDOUT:   ret ptr %x, !dbg !53
    161. 

  161. // CHECK:STDOUT:
    162. 

  162. // CHECK:STDOUT: if.else.loc20:                                    ; preds = %entry
    163. 

  163. // CHECK:STDOUT:   %int.smod = srem i32 %count, 2, !dbg !54
    164. 

  164. // CHECK:STDOUT:   %int.eq = icmp eq i32 %int.smod, 0, !dbg !54
    165. 

  165. // CHECK:STDOUT:   br i1 %int.eq, label %if.then.loc23, label %if.else.loc23, !dbg !55
    166. 

  166. // CHECK:STDOUT:
    167. 

  167. // CHECK:STDOUT: if.then.loc23:                                    ; preds = %if.else.loc20
    168. 

  168. // CHECK:STDOUT:   %B.call = call ptr @_CB.Main.04bf2edaaa84aa22(ptr %x, i32 %count), !dbg !56
    169. 

  169. // CHECK:STDOUT:   ret ptr %B.call, !dbg !57
    170. 

  170. // CHECK:STDOUT:
    171. 

  171. // CHECK:STDOUT: if.else.loc23:                                    ; preds = %if.else.loc20
    172. 

  172. // CHECK:STDOUT:   %C.call = call ptr @_CC.Main.04bf2edaaa84aa22(ptr %x, i32 %count), !dbg !58
    173. 

  173. // CHECK:STDOUT:   ret ptr %C.call, !dbg !59
    174. 

  174. // CHECK:STDOUT: }
    175. 

  175. // CHECK:STDOUT:
    176. 

  176. // CHECK:STDOUT: define i32 @_CB.Main.b88d1103f417c6d4(i32 %x, i32 %count) !dbg !60 {
    177. 

  177. // CHECK:STDOUT: entry:
    178. 

  178. // CHECK:STDOUT:   %print.int = call i32 (ptr, ...) @printf(ptr @printf.int.format, i32 1), !dbg !61
    179. 

  179. // CHECK:STDOUT:   %D.call = call i32 @_CD.Main.b88d1103f417c6d4(i32 %x, i32 %count), !dbg !62
    180. 

  180. // CHECK:STDOUT:   ret i32 %D.call, !dbg !63
    181. 

  181. // CHECK:STDOUT: }
    182. 

  182. // CHECK:STDOUT:
    183. 

  183. // CHECK:STDOUT: define i32 @_CC.Main.b88d1103f417c6d4(i32 %x, i32 %count) !dbg !64 {
    184. 

  184. // CHECK:STDOUT: entry:
    185. 

  185. // CHECK:STDOUT:   %print.int = call i32 (ptr, ...) @printf(ptr @printf.int.format, i32 2), !dbg !65
    186. 

  186. // CHECK:STDOUT:   %D.call = call i32 @_CD.Main.b88d1103f417c6d4(i32 %x, i32 %count), !dbg !66
    187. 

  187. // CHECK:STDOUT:   ret i32 %D.call, !dbg !67
    188. 

  188. // CHECK:STDOUT: }
    189. 

  189. // CHECK:STDOUT:
    190. 

  190. // CHECK:STDOUT: define double @_CB.Main.66be507887ceee78(double %x, i32 %count) !dbg !68 {
    191. 

  191. // CHECK:STDOUT: entry:
    192. 

  192. // CHECK:STDOUT:   %print.int = call i32 (ptr, ...) @printf(ptr @printf.int.format, i32 1), !dbg !69
    193. 

  193. // CHECK:STDOUT:   %D.call = call double @_CD.Main.66be507887ceee78(double %x, i32 %count), !dbg !70
    194. 

  194. // CHECK:STDOUT:   ret double %D.call, !dbg !71
    195. 

  195. // CHECK:STDOUT: }
    196. 

  196. // CHECK:STDOUT:
    197. 

  197. // CHECK:STDOUT: define double @_CC.Main.66be507887ceee78(double %x, i32 %count) !dbg !72 {
    198. 

  198. // CHECK:STDOUT: entry:
    199. 

  199. // CHECK:STDOUT:   %print.int = call i32 (ptr, ...) @printf(ptr @printf.int.format, i32 2), !dbg !73
    200. 

  200. // CHECK:STDOUT:   %D.call = call double @_CD.Main.66be507887ceee78(double %x, i32 %count), !dbg !74
    201. 

  201. // CHECK:STDOUT:   ret double %D.call, !dbg !75
    202. 

  202. // CHECK:STDOUT: }
    203. 

  203. // CHECK:STDOUT:
    204. 

  204. // CHECK:STDOUT: define ptr @_CB.Main.e8193710fd35b608(ptr %x, i32 %count) !dbg !76 {
    205. 

  205. // CHECK:STDOUT: entry:
    206. 

  206. // CHECK:STDOUT:   %print.int = call i32 (ptr, ...) @printf(ptr @printf.int.format, i32 1), !dbg !77
    207. 

  207. // CHECK:STDOUT:   %D.call = call ptr @_CD.Main.e8193710fd35b608(ptr %x, i32 %count), !dbg !78
    208. 

  208. // CHECK:STDOUT:   ret ptr %D.call, !dbg !79
    209. 

  209. // CHECK:STDOUT: }
    210. 

  210. // CHECK:STDOUT:
    211. 

  211. // CHECK:STDOUT: define ptr @_CC.Main.e8193710fd35b608(ptr %x, i32 %count) !dbg !80 {
    212. 

  212. // CHECK:STDOUT: entry:
    213. 

  213. // CHECK:STDOUT:   %print.int = call i32 (ptr, ...) @printf(ptr @printf.int.format, i32 2), !dbg !81
    214. 

  214. // CHECK:STDOUT:   %D.call = call ptr @_CD.Main.e8193710fd35b608(ptr %x, i32 %count), !dbg !82
    215. 

  215. // CHECK:STDOUT:   ret ptr %D.call, !dbg !83
    216. 

  216. // CHECK:STDOUT: }
    217. 

  217. // CHECK:STDOUT:
    218. 

  218. // CHECK:STDOUT: define ptr @_CB.Main.04bf2edaaa84aa22(ptr %x, i32 %count) !dbg !84 {
    219. 

  219. // CHECK:STDOUT: entry:
    220. 

  220. // CHECK:STDOUT:   %print.int = call i32 (ptr, ...) @printf(ptr @printf.int.format, i32 1), !dbg !85
    221. 

  221. // CHECK:STDOUT:   %D.call = call ptr @_CD.Main.04bf2edaaa84aa22(ptr %x, i32 %count), !dbg !86
    222. 

  222. // CHECK:STDOUT:   ret ptr %D.call, !dbg !87
    223. 

  223. // CHECK:STDOUT: }
    224. 

  224. // CHECK:STDOUT:
    225. 

  225. // CHECK:STDOUT: define ptr @_CC.Main.04bf2edaaa84aa22(ptr %x, i32 %count) !dbg !88 {
    226. 

  226. // CHECK:STDOUT: entry:
    227. 

  227. // CHECK:STDOUT:   %print.int = call i32 (ptr, ...) @printf(ptr @printf.int.format, i32 2), !dbg !89
    228. 

  228. // CHECK:STDOUT:   %D.call = call ptr @_CD.Main.04bf2edaaa84aa22(ptr %x, i32 %count), !dbg !90
    229. 

  229. // CHECK:STDOUT:   ret ptr %D.call, !dbg !91
    230. 

  230. // CHECK:STDOUT: }
    231. 

  231. // CHECK:STDOUT:
    232. 

  232. // CHECK:STDOUT: declare i32 @printf(ptr, ...)
    233. 

  233. // CHECK:STDOUT:
    234. 

  234. // CHECK:STDOUT: define i32 @_CD.Main.b88d1103f417c6d4(i32 %x, i32 %count) !dbg !92 {
    235. 

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

  236. // CHECK:STDOUT:   %int.sadd = add i32 %count, 1, !dbg !93
    237. 

  237. // CHECK:STDOUT:   %A.call = call i32 @_CA.Main.b88d1103f417c6d4(i32 %x, i32 %int.sadd), !dbg !94
    238. 

  238. // CHECK:STDOUT:   ret i32 %A.call, !dbg !95
    239. 

  239. // CHECK:STDOUT: }
    240. 

  240. // CHECK:STDOUT:
    241. 

  241. // CHECK:STDOUT: define double @_CD.Main.66be507887ceee78(double %x, i32 %count) !dbg !96 {
    242. 

  242. // CHECK:STDOUT: entry:
    243. 

  243. // CHECK:STDOUT:   %int.sadd = add i32 %count, 1, !dbg !97
    244. 

  244. // CHECK:STDOUT:   %A.call = call double @_CA.Main.66be507887ceee78(double %x, i32 %int.sadd), !dbg !98
    245. 

  245. // CHECK:STDOUT:   ret double %A.call, !dbg !99
    246. 

  246. // CHECK:STDOUT: }
    247. 

  247. // CHECK:STDOUT:
    248. 

  248. // CHECK:STDOUT: define ptr @_CD.Main.e8193710fd35b608(ptr %x, i32 %count) !dbg !100 {
    249. 

  249. // CHECK:STDOUT: entry:
    250. 

  250. // CHECK:STDOUT:   %int.sadd = add i32 %count, 1, !dbg !101
    251. 

  251. // CHECK:STDOUT:   %A.call = call ptr @_CA.Main.e8193710fd35b608(ptr %x, i32 %int.sadd), !dbg !102
    252. 

  252. // CHECK:STDOUT:   ret ptr %A.call, !dbg !103
    253. 

  253. // CHECK:STDOUT: }
    254. 

  254. // CHECK:STDOUT:
    255. 

  255. // CHECK:STDOUT: define ptr @_CD.Main.04bf2edaaa84aa22(ptr %x, i32 %count) !dbg !104 {
    256. 

  256. // CHECK:STDOUT: entry:
    257. 

  257. // CHECK:STDOUT:   %int.sadd = add i32 %count, 1, !dbg !105
    258. 

  258. // CHECK:STDOUT:   %A.call = call ptr @_CA.Main.04bf2edaaa84aa22(ptr %x, i32 %int.sadd), !dbg !106
    259. 

  259. // CHECK:STDOUT:   ret ptr %A.call, !dbg !107
    260. 

  260. // CHECK:STDOUT: }
    261. 

  261. // CHECK:STDOUT:
    262. 

  262. // CHECK:STDOUT: ; uselistorder directives
    263. 

  263. // CHECK:STDOUT: uselistorder ptr @llvm.lifetime.start.p0, { 3, 2, 1, 0 }
    264. 

  264. // CHECK:STDOUT: uselistorder ptr @printf, { 7, 6, 5, 4, 3, 2, 1, 0 }
    265. 

  265. // CHECK:STDOUT: uselistorder ptr @_CD.Main.b88d1103f417c6d4, { 1, 0 }
    266. 

  266. // CHECK:STDOUT: uselistorder ptr @_CD.Main.66be507887ceee78, { 1, 0 }
    267. 

  267. // CHECK:STDOUT: uselistorder ptr @_CD.Main.e8193710fd35b608, { 1, 0 }
    268. 

  268. // CHECK:STDOUT: uselistorder ptr @_CD.Main.04bf2edaaa84aa22, { 1, 0 }
    269. 

  269. // CHECK:STDOUT:
    270. 

  270. // CHECK:STDOUT: attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
    271. 

  271. // CHECK:STDOUT:
    272. 

  272. // CHECK:STDOUT: !llvm.module.flags = !{!0, !1}
    273. 

  273. // CHECK:STDOUT: !llvm.dbg.cu = !{!2}
    274. 

  274. // CHECK:STDOUT:
    275. 

  275. // CHECK:STDOUT: !0 = !{i32 7, !"Dwarf Version", i32 5}
    276. 

  276. // CHECK:STDOUT: !1 = !{i32 2, !"Debug Info Version", i32 3}
    277. 

  277. // CHECK:STDOUT: !2 = distinct !DICompileUnit(language: DW_LANG_C, file: !3, producer: "carbon", isOptimized: false, runtimeVersion: 0, emissionKind: FullDebug)
    278. 

  278. // CHECK:STDOUT: !3 = !DIFile(filename: "call_recursive_diamond.carbon", directory: "")
    279. 

  279. // CHECK:STDOUT: !4 = distinct !DISubprogram(name: "M", linkageName: "_CM.Main", scope: null, file: !3, line: 45, type: !5, spFlags: DISPFlagDefinition, unit: !2)
    280. 

  280. // CHECK:STDOUT: !5 = !DISubroutineType(types: !6)
    281. 

  281. // CHECK:STDOUT: !6 = !{}
    282. 

  282. // CHECK:STDOUT: !7 = !DILocation(line: 46, column: 3, scope: !4)
    283. 

  283. // CHECK:STDOUT: !8 = !DILocation(line: 47, column: 3, scope: !4)
    284. 

  284. // CHECK:STDOUT: !9 = !DILocation(line: 48, column: 3, scope: !4)
    285. 

  285. // CHECK:STDOUT: !10 = !DILocation(line: 49, column: 3, scope: !4)
    286. 

  286. // CHECK:STDOUT: !11 = !DILocation(line: 51, column: 5, scope: !4)
    287. 

  287. // CHECK:STDOUT: !12 = !DILocation(line: 51, column: 3, scope: !4)
    288. 

  288. // CHECK:STDOUT: !13 = !DILocation(line: 52, column: 5, scope: !4)
    289. 

  289. // CHECK:STDOUT: !14 = !DILocation(line: 52, column: 3, scope: !4)
    290. 

  290. // CHECK:STDOUT: !15 = !DILocation(line: 53, column: 5, scope: !4)
    291. 

  291. // CHECK:STDOUT: !16 = !DILocation(line: 53, column: 3, scope: !4)
    292. 

  292. // CHECK:STDOUT: !17 = !DILocation(line: 54, column: 5, scope: !4)
    293. 

  293. // CHECK:STDOUT: !18 = !DILocation(line: 54, column: 3, scope: !4)
    294. 

  294. // CHECK:STDOUT: !19 = !DILocation(line: 45, column: 1, scope: !4)
    295. 

  295. // CHECK:STDOUT: !20 = distinct !DISubprogram(name: "A", linkageName: "_CA.Main.b88d1103f417c6d4", scope: null, file: !3, line: 19, type: !5, spFlags: DISPFlagDefinition, unit: !2)
    296. 

  296. // CHECK:STDOUT: !21 = !DILocation(line: 20, column: 7, scope: !20)
    297. 

  297. // CHECK:STDOUT: !22 = !DILocation(line: 20, column: 6, scope: !20)
    298. 

  298. // CHECK:STDOUT: !23 = !DILocation(line: 21, column: 5, scope: !20)
    299. 

  299. // CHECK:STDOUT: !24 = !DILocation(line: 23, column: 7, scope: !20)
    300. 

  300. // CHECK:STDOUT: !25 = !DILocation(line: 23, column: 6, scope: !20)
    301. 

  301. // CHECK:STDOUT: !26 = !DILocation(line: 24, column: 12, scope: !20)
    302. 

  302. // CHECK:STDOUT: !27 = !DILocation(line: 24, column: 5, scope: !20)
    303. 

  303. // CHECK:STDOUT: !28 = !DILocation(line: 26, column: 12, scope: !20)
    304. 

  304. // CHECK:STDOUT: !29 = !DILocation(line: 26, column: 5, scope: !20)
    305. 

  305. // CHECK:STDOUT: !30 = distinct !DISubprogram(name: "A", linkageName: "_CA.Main.66be507887ceee78", scope: null, file: !3, line: 19, type: !5, spFlags: DISPFlagDefinition, unit: !2)
    306. 

  306. // CHECK:STDOUT: !31 = !DILocation(line: 20, column: 7, scope: !30)
    307. 

  307. // CHECK:STDOUT: !32 = !DILocation(line: 20, column: 6, scope: !30)
    308. 

  308. // CHECK:STDOUT: !33 = !DILocation(line: 21, column: 5, scope: !30)
    309. 

  309. // CHECK:STDOUT: !34 = !DILocation(line: 23, column: 7, scope: !30)
    310. 

  310. // CHECK:STDOUT: !35 = !DILocation(line: 23, column: 6, scope: !30)
    311. 

  311. // CHECK:STDOUT: !36 = !DILocation(line: 24, column: 12, scope: !30)
    312. 

  312. // CHECK:STDOUT: !37 = !DILocation(line: 24, column: 5, scope: !30)
    313. 

  313. // CHECK:STDOUT: !38 = !DILocation(line: 26, column: 12, scope: !30)
    314. 

  314. // CHECK:STDOUT: !39 = !DILocation(line: 26, column: 5, scope: !30)
    315. 

  315. // CHECK:STDOUT: !40 = distinct !DISubprogram(name: "A", linkageName: "_CA.Main.e8193710fd35b608", scope: null, file: !3, line: 19, type: !5, spFlags: DISPFlagDefinition, unit: !2)
    316. 

  316. // CHECK:STDOUT: !41 = !DILocation(line: 20, column: 7, scope: !40)
    317. 

  317. // CHECK:STDOUT: !42 = !DILocation(line: 20, column: 6, scope: !40)
    318. 

  318. // CHECK:STDOUT: !43 = !DILocation(line: 21, column: 5, scope: !40)
    319. 

  319. // CHECK:STDOUT: !44 = !DILocation(line: 23, column: 7, scope: !40)
    320. 

  320. // CHECK:STDOUT: !45 = !DILocation(line: 23, column: 6, scope: !40)
    321. 

  321. // CHECK:STDOUT: !46 = !DILocation(line: 24, column: 12, scope: !40)
    322. 

  322. // CHECK:STDOUT: !47 = !DILocation(line: 24, column: 5, scope: !40)
    323. 

  323. // CHECK:STDOUT: !48 = !DILocation(line: 26, column: 12, scope: !40)
    324. 

  324. // CHECK:STDOUT: !49 = !DILocation(line: 26, column: 5, scope: !40)
    325. 

  325. // CHECK:STDOUT: !50 = distinct !DISubprogram(name: "A", linkageName: "_CA.Main.04bf2edaaa84aa22", scope: null, file: !3, line: 19, type: !5, spFlags: DISPFlagDefinition, unit: !2)
    326. 

  326. // CHECK:STDOUT: !51 = !DILocation(line: 20, column: 7, scope: !50)
    327. 

  327. // CHECK:STDOUT: !52 = !DILocation(line: 20, column: 6, scope: !50)
    328. 

  328. // CHECK:STDOUT: !53 = !DILocation(line: 21, column: 5, scope: !50)
    329. 

  329. // CHECK:STDOUT: !54 = !DILocation(line: 23, column: 7, scope: !50)
    330. 

  330. // CHECK:STDOUT: !55 = !DILocation(line: 23, column: 6, scope: !50)
    331. 

  331. // CHECK:STDOUT: !56 = !DILocation(line: 24, column: 12, scope: !50)
    332. 

  332. // CHECK:STDOUT: !57 = !DILocation(line: 24, column: 5, scope: !50)
    333. 

  333. // CHECK:STDOUT: !58 = !DILocation(line: 26, column: 12, scope: !50)
    334. 

  334. // CHECK:STDOUT: !59 = !DILocation(line: 26, column: 5, scope: !50)
    335. 

  335. // CHECK:STDOUT: !60 = distinct !DISubprogram(name: "B", linkageName: "_CB.Main.b88d1103f417c6d4", scope: null, file: !3, line: 31, type: !5, spFlags: DISPFlagDefinition, unit: !2)
    336. 

  336. // CHECK:STDOUT: !61 = !DILocation(line: 32, column: 3, scope: !60)
    337. 

  337. // CHECK:STDOUT: !62 = !DILocation(line: 33, column: 10, scope: !60)
    338. 

  338. // CHECK:STDOUT: !63 = !DILocation(line: 33, column: 3, scope: !60)
    339. 

  339. // CHECK:STDOUT: !64 = distinct !DISubprogram(name: "C", linkageName: "_CC.Main.b88d1103f417c6d4", scope: null, file: !3, line: 36, type: !5, spFlags: DISPFlagDefinition, unit: !2)
    340. 

  340. // CHECK:STDOUT: !65 = !DILocation(line: 37, column: 3, scope: !64)
    341. 

  341. // CHECK:STDOUT: !66 = !DILocation(line: 38, column: 10, scope: !64)
    342. 

  342. // CHECK:STDOUT: !67 = !DILocation(line: 38, column: 3, scope: !64)
    343. 

  343. // CHECK:STDOUT: !68 = distinct !DISubprogram(name: "B", linkageName: "_CB.Main.66be507887ceee78", scope: null, file: !3, line: 31, type: !5, spFlags: DISPFlagDefinition, unit: !2)
    344. 

  344. // CHECK:STDOUT: !69 = !DILocation(line: 32, column: 3, scope: !68)
    345. 

  345. // CHECK:STDOUT: !70 = !DILocation(line: 33, column: 10, scope: !68)
    346. 

  346. // CHECK:STDOUT: !71 = !DILocation(line: 33, column: 3, scope: !68)
    347. 

  347. // CHECK:STDOUT: !72 = distinct !DISubprogram(name: "C", linkageName: "_CC.Main.66be507887ceee78", scope: null, file: !3, line: 36, type: !5, spFlags: DISPFlagDefinition, unit: !2)
    348. 

  348. // CHECK:STDOUT: !73 = !DILocation(line: 37, column: 3, scope: !72)
    349. 

  349. // CHECK:STDOUT: !74 = !DILocation(line: 38, column: 10, scope: !72)
    350. 

  350. // CHECK:STDOUT: !75 = !DILocation(line: 38, column: 3, scope: !72)
    351. 

  351. // CHECK:STDOUT: !76 = distinct !DISubprogram(name: "B", linkageName: "_CB.Main.e8193710fd35b608", scope: null, file: !3, line: 31, type: !5, spFlags: DISPFlagDefinition, unit: !2)
    352. 

  352. // CHECK:STDOUT: !77 = !DILocation(line: 32, column: 3, scope: !76)
    353. 

  353. // CHECK:STDOUT: !78 = !DILocation(line: 33, column: 10, scope: !76)
    354. 

  354. // CHECK:STDOUT: !79 = !DILocation(line: 33, column: 3, scope: !76)
    355. 

  355. // CHECK:STDOUT: !80 = distinct !DISubprogram(name: "C", linkageName: "_CC.Main.e8193710fd35b608", scope: null, file: !3, line: 36, type: !5, spFlags: DISPFlagDefinition, unit: !2)
    356. 

  356. // CHECK:STDOUT: !81 = !DILocation(line: 37, column: 3, scope: !80)
    357. 

  357. // CHECK:STDOUT: !82 = !DILocation(line: 38, column: 10, scope: !80)
    358. 

  358. // CHECK:STDOUT: !83 = !DILocation(line: 38, column: 3, scope: !80)
    359. 

  359. // CHECK:STDOUT: !84 = distinct !DISubprogram(name: "B", linkageName: "_CB.Main.04bf2edaaa84aa22", scope: null, file: !3, line: 31, type: !5, spFlags: DISPFlagDefinition, unit: !2)
    360. 

  360. // CHECK:STDOUT: !85 = !DILocation(line: 32, column: 3, scope: !84)
    361. 

  361. // CHECK:STDOUT: !86 = !DILocation(line: 33, column: 10, scope: !84)
    362. 

  362. // CHECK:STDOUT: !87 = !DILocation(line: 33, column: 3, scope: !84)
    363. 

  363. // CHECK:STDOUT: !88 = distinct !DISubprogram(name: "C", linkageName: "_CC.Main.04bf2edaaa84aa22", scope: null, file: !3, line: 36, type: !5, spFlags: DISPFlagDefinition, unit: !2)
    364. 

  364. // CHECK:STDOUT: !89 = !DILocation(line: 37, column: 3, scope: !88)
    365. 

  365. // CHECK:STDOUT: !90 = !DILocation(line: 38, column: 10, scope: !88)
    366. 

  366. // CHECK:STDOUT: !91 = !DILocation(line: 38, column: 3, scope: !88)
    367. 

  367. // CHECK:STDOUT: !92 = distinct !DISubprogram(name: "D", linkageName: "_CD.Main.b88d1103f417c6d4", scope: null, file: !3, line: 41, type: !5, spFlags: DISPFlagDefinition, unit: !2)
    368. 

  368. // CHECK:STDOUT: !93 = !DILocation(line: 42, column: 15, scope: !92)
    369. 

  369. // CHECK:STDOUT: !94 = !DILocation(line: 42, column: 10, scope: !92)
    370. 

  370. // CHECK:STDOUT: !95 = !DILocation(line: 42, column: 3, scope: !92)
    371. 

  371. // CHECK:STDOUT: !96 = distinct !DISubprogram(name: "D", linkageName: "_CD.Main.66be507887ceee78", scope: null, file: !3, line: 41, type: !5, spFlags: DISPFlagDefinition, unit: !2)
    372. 

  372. // CHECK:STDOUT: !97 = !DILocation(line: 42, column: 15, scope: !96)
    373. 

  373. // CHECK:STDOUT: !98 = !DILocation(line: 42, column: 10, scope: !96)
    374. 

  374. // CHECK:STDOUT: !99 = !DILocation(line: 42, column: 3, scope: !96)
    375. 

  375. // CHECK:STDOUT: !100 = distinct !DISubprogram(name: "D", linkageName: "_CD.Main.e8193710fd35b608", scope: null, file: !3, line: 41, type: !5, spFlags: DISPFlagDefinition, unit: !2)
    376. 

  376. // CHECK:STDOUT: !101 = !DILocation(line: 42, column: 15, scope: !100)
    377. 

  377. // CHECK:STDOUT: !102 = !DILocation(line: 42, column: 10, scope: !100)
    378. 

  378. // CHECK:STDOUT: !103 = !DILocation(line: 42, column: 3, scope: !100)
    379. 

  379. // CHECK:STDOUT: !104 = distinct !DISubprogram(name: "D", linkageName: "_CD.Main.04bf2edaaa84aa22", scope: null, file: !3, line: 41, type: !5, spFlags: DISPFlagDefinition, unit: !2)
    380. 

  380. // CHECK:STDOUT: !105 = !DILocation(line: 42, column: 15, scope: !104)
    381. 

  381. // CHECK:STDOUT: !106 = !DILocation(line: 42, column: 10, scope: !104)
    382. 

  382. // CHECK:STDOUT: !107 = !DILocation(line: 42, column: 3, scope: !104)
    383.