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carbon-lang
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int_mod.carbon

int_mod.carbon 13 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. 

  7. // --- int_div.carbon
    8. 

  8. 

  9. fn Mod(a: i32, b: i32) -> i32 = "int.mod";
    10. 

  10. 

  11. var arr: [i32; Mod(5, 3)];
    12. 

  12. let arr_p: [i32; 2]* = &arr;
    13. 

  13. 

  14. fn RuntimeCall(a: i32, b: i32) -> i32 {
    15. 

  15.   return Mod(a, b);
    16. 

  16. }
    17. 

  17. 

  18. // --- fail_overflow.carbon
    19. 

  19. 

  20. package FailOverflow api;
    21. 

  21. 

  22. fn Mod(a: i32, b: i32) -> i32 = "int.mod";
    23. 

  23. fn Sub(a: i32, b: i32) -> i32 = "int.sub";
    24. 

  24. fn Negate(a: i32) -> i32 = "int.negate";
    25. 

  25. 

  26. // -0x7FFF_FFFF % -1 is OK.
    27. 

  27. let a: i32 = Mod(Negate(0x7FFF_FFFF), Negate(1));
    28. 

  28. 

  29. // -0x8000_0000 % 1 is OK.
    30. 

  30. let b: i32 = Mod(Sub(Negate(0x7FFF_FFFF), 1), 1);
    31. 

  31. 

  32. // -0x8000_0000 / -1 overflows, so -0x8000_0000 % -1 is disallowed, even though
    33. 

  33. // its result is representable.
    34. 

  34. // CHECK:STDERR: fail_overflow.carbon:[[@LINE+4]]:14: ERROR: Integer overflow in calculation -2147483648 % -1.
    35. 

  35. // CHECK:STDERR: let c: i32 = Mod(Sub(Negate(0x7FFF_FFFF), 1), Negate(1));
    36. 

  36. // CHECK:STDERR:              ^~~~
    37. 

  37. // CHECK:STDERR:
    38. 

  38. let c: i32 = Mod(Sub(Negate(0x7FFF_FFFF), 1), Negate(1));
    39. 

  39. 

  40. // --- fail_div_by_zero.carbon
    41. 

  41. 

  42. package FailDivByZero api;
    43. 

  43. 

  44. fn Mod(a: i32, b: i32) -> i32 = "int.mod";
    45. 

  45. 

  46. // Remainder of division by zero is not defined.
    47. 

  47. 

  48. // CHECK:STDERR: fail_div_by_zero.carbon:[[@LINE+4]]:14: ERROR: Division by zero.
    49. 

  49. // CHECK:STDERR: let a: i32 = Mod(1, 0);
    50. 

  50. // CHECK:STDERR:              ^~~~
    51. 

  51. // CHECK:STDERR:
    52. 

  52. let a: i32 = Mod(1, 0);
    53. 

  53. 

  54. // CHECK:STDERR: fail_div_by_zero.carbon:[[@LINE+3]]:14: ERROR: Division by zero.
    55. 

  55. // CHECK:STDERR: let b: i32 = Mod(0, 0);
    56. 

  56. // CHECK:STDERR:              ^~~~
    57. 

  57. let b: i32 = Mod(0, 0);
    58. 

  58. 

  59. // CHECK:STDOUT: --- int_div.carbon
    60. 

  60. // CHECK:STDOUT:
    61. 

  61. // CHECK:STDOUT: constants {
    62. 

  62. // CHECK:STDOUT:   %.1: i32 = int_literal 5 [template]
    63. 

  63. // CHECK:STDOUT:   %.2: i32 = int_literal 3 [template]
    64. 

  64. // CHECK:STDOUT:   %.3: i32 = int_literal 2 [template]
    65. 

  65. // CHECK:STDOUT:   %.4: type = array_type %.3, i32 [template]
    66. 

  66. // CHECK:STDOUT:   %.5: type = ptr_type [i32; 2] [template]
    67. 

  67. // CHECK:STDOUT: }
    68. 

  68. // CHECK:STDOUT:
    69. 

  69. // CHECK:STDOUT: file {
    70. 

  70. // CHECK:STDOUT:   package: <namespace> = namespace [template] {
    71. 

  71. // CHECK:STDOUT:     .Mod = %Mod
    72. 

  72. // CHECK:STDOUT:     .arr = %arr
    73. 

  73. // CHECK:STDOUT:     .RuntimeCall = %RuntimeCall
    74. 

  74. // CHECK:STDOUT:   }
    75. 

  75. // CHECK:STDOUT:   %Mod: <function> = fn_decl @Mod [template] {
    76. 

  76. // CHECK:STDOUT:     %a.loc2_8.1: i32 = param a
    77. 

  77. // CHECK:STDOUT:     @Mod.%a: i32 = bind_name a, %a.loc2_8.1
    78. 

  78. // CHECK:STDOUT:     %b.loc2_16.1: i32 = param b
    79. 

  79. // CHECK:STDOUT:     @Mod.%b: i32 = bind_name b, %b.loc2_16.1
    80. 

  80. // CHECK:STDOUT:     %return.var.loc2: ref i32 = var <return slot>
    81. 

  81. // CHECK:STDOUT:   }
    82. 

  82. // CHECK:STDOUT:   %Mod.ref: <function> = name_ref Mod, %Mod [template = %Mod]
    83. 

  83. // CHECK:STDOUT:   %.loc4_20: i32 = int_literal 5 [template = constants.%.1]
    84. 

  84. // CHECK:STDOUT:   %.loc4_23: i32 = int_literal 3 [template = constants.%.2]
    85. 

  85. // CHECK:STDOUT:   %.loc4_19: init i32 = call %Mod.ref(%.loc4_20, %.loc4_23) [template = constants.%.3]
    86. 

  86. // CHECK:STDOUT:   %.loc4_25: type = array_type %.loc4_19, i32 [template = constants.%.4]
    87. 

  87. // CHECK:STDOUT:   %arr.var: ref [i32; 2] = var arr
    88. 

  88. // CHECK:STDOUT:   %arr: ref [i32; 2] = bind_name arr, %arr.var
    89. 

  89. // CHECK:STDOUT:   %.loc5_18: i32 = int_literal 2 [template = constants.%.3]
    90. 

  90. // CHECK:STDOUT:   %.loc5_19: type = array_type %.loc5_18, i32 [template = constants.%.4]
    91. 

  91. // CHECK:STDOUT:   %.loc5_20: type = ptr_type [i32; 2] [template = constants.%.5]
    92. 

  92. // CHECK:STDOUT:   %arr.ref: ref [i32; 2] = name_ref arr, %arr
    93. 

  93. // CHECK:STDOUT:   %.loc5_24: [i32; 2]* = addr_of %arr.ref
    94. 

  94. // CHECK:STDOUT:   %arr_p: [i32; 2]* = bind_name arr_p, %.loc5_24
    95. 

  95. // CHECK:STDOUT:   %RuntimeCall: <function> = fn_decl @RuntimeCall [template] {
    96. 

  96. // CHECK:STDOUT:     %a.loc7_16.1: i32 = param a
    97. 

  97. // CHECK:STDOUT:     @RuntimeCall.%a: i32 = bind_name a, %a.loc7_16.1
    98. 

  98. // CHECK:STDOUT:     %b.loc7_24.1: i32 = param b
    99. 

  99. // CHECK:STDOUT:     @RuntimeCall.%b: i32 = bind_name b, %b.loc7_24.1
    100. 

  100. // CHECK:STDOUT:     %return.var.loc7: ref i32 = var <return slot>
    101. 

  101. // CHECK:STDOUT:   }
    102. 

  102. // CHECK:STDOUT: }
    103. 

  103. // CHECK:STDOUT:
    104. 

  104. // CHECK:STDOUT: fn @Mod(%a: i32, %b: i32) -> i32 = "int.mod";
    105. 

  105. // CHECK:STDOUT:
    106. 

  106. // CHECK:STDOUT: fn @RuntimeCall(%a: i32, %b: i32) -> i32 {
    107. 

  107. // CHECK:STDOUT: !entry:
    108. 

  108. // CHECK:STDOUT:   %Mod.ref: <function> = name_ref Mod, file.%Mod [template = file.%Mod]
    109. 

  109. // CHECK:STDOUT:   %a.ref: i32 = name_ref a, %a
    110. 

  110. // CHECK:STDOUT:   %b.ref: i32 = name_ref b, %b
    111. 

  111. // CHECK:STDOUT:   %.loc8_13.1: init i32 = call %Mod.ref(%a.ref, %b.ref)
    112. 

  112. // CHECK:STDOUT:   %.loc8_19: i32 = value_of_initializer %.loc8_13.1
    113. 

  113. // CHECK:STDOUT:   %.loc8_13.2: i32 = converted %.loc8_13.1, %.loc8_19
    114. 

  114. // CHECK:STDOUT:   return %.loc8_13.2
    115. 

  115. // CHECK:STDOUT: }
    116. 

  116. // CHECK:STDOUT:
    117. 

  117. // CHECK:STDOUT: --- fail_overflow.carbon
    118. 

  118. // CHECK:STDOUT:
    119. 

  119. // CHECK:STDOUT: constants {
    120. 

  120. // CHECK:STDOUT:   %.1: i32 = int_literal 2147483647 [template]
    121. 

  121. // CHECK:STDOUT:   %.2: i32 = int_literal -2147483647 [template]
    122. 

  122. // CHECK:STDOUT:   %.3: i32 = int_literal 1 [template]
    123. 

  123. // CHECK:STDOUT:   %.4: i32 = int_literal -1 [template]
    124. 

  124. // CHECK:STDOUT:   %.5: i32 = int_literal 0 [template]
    125. 

  125. // CHECK:STDOUT:   %.6: i32 = int_literal -2147483648 [template]
    126. 

  126. // CHECK:STDOUT: }
    127. 

  127. // CHECK:STDOUT:
    128. 

  128. // CHECK:STDOUT: file {
    129. 

  129. // CHECK:STDOUT:   package: <namespace> = namespace [template] {
    130. 

  130. // CHECK:STDOUT:     .Mod = %Mod
    131. 

  131. // CHECK:STDOUT:     .Sub = %Sub
    132. 

  132. // CHECK:STDOUT:     .Negate = %Negate
    133. 

  133. // CHECK:STDOUT:   }
    134. 

  134. // CHECK:STDOUT:   %Mod: <function> = fn_decl @Mod [template] {
    135. 

  135. // CHECK:STDOUT:     %a.loc4_8.1: i32 = param a
    136. 

  136. // CHECK:STDOUT:     @Mod.%a: i32 = bind_name a, %a.loc4_8.1
    137. 

  137. // CHECK:STDOUT:     %b.loc4_16.1: i32 = param b
    138. 

  138. // CHECK:STDOUT:     @Mod.%b: i32 = bind_name b, %b.loc4_16.1
    139. 

  139. // CHECK:STDOUT:     %return.var.loc4: ref i32 = var <return slot>
    140. 

  140. // CHECK:STDOUT:   }
    141. 

  141. // CHECK:STDOUT:   %Sub: <function> = fn_decl @Sub [template] {
    142. 

  142. // CHECK:STDOUT:     %a.loc5_8.1: i32 = param a
    143. 

  143. // CHECK:STDOUT:     @Sub.%a: i32 = bind_name a, %a.loc5_8.1
    144. 

  144. // CHECK:STDOUT:     %b.loc5_16.1: i32 = param b
    145. 

  145. // CHECK:STDOUT:     @Sub.%b: i32 = bind_name b, %b.loc5_16.1
    146. 

  146. // CHECK:STDOUT:     %return.var.loc5: ref i32 = var <return slot>
    147. 

  147. // CHECK:STDOUT:   }
    148. 

  148. // CHECK:STDOUT:   %Negate: <function> = fn_decl @Negate [template] {
    149. 

  149. // CHECK:STDOUT:     %a.loc6_11.1: i32 = param a
    150. 

  150. // CHECK:STDOUT:     @Negate.%a: i32 = bind_name a, %a.loc6_11.1
    151. 

  151. // CHECK:STDOUT:     %return.var.loc6: ref i32 = var <return slot>
    152. 

  152. // CHECK:STDOUT:   }
    153. 

  153. // CHECK:STDOUT:   %Mod.ref.loc9: <function> = name_ref Mod, %Mod [template = %Mod]
    154. 

  154. // CHECK:STDOUT:   %Negate.ref.loc9_18: <function> = name_ref Negate, %Negate [template = %Negate]
    155. 

  155. // CHECK:STDOUT:   %.loc9_25: i32 = int_literal 2147483647 [template = constants.%.1]
    156. 

  156. // CHECK:STDOUT:   %.loc9_24.1: init i32 = call %Negate.ref.loc9_18(%.loc9_25) [template = constants.%.2]
    157. 

  157. // CHECK:STDOUT:   %Negate.ref.loc9_39: <function> = name_ref Negate, %Negate [template = %Negate]
    158. 

  158. // CHECK:STDOUT:   %.loc9_46: i32 = int_literal 1 [template = constants.%.3]
    159. 

  159. // CHECK:STDOUT:   %.loc9_45.1: init i32 = call %Negate.ref.loc9_39(%.loc9_46) [template = constants.%.4]
    160. 

  160. // CHECK:STDOUT:   %.loc9_17.1: i32 = value_of_initializer %.loc9_24.1 [template = constants.%.2]
    161. 

  161. // CHECK:STDOUT:   %.loc9_24.2: i32 = converted %.loc9_24.1, %.loc9_17.1 [template = constants.%.2]
    162. 

  162. // CHECK:STDOUT:   %.loc9_17.2: i32 = value_of_initializer %.loc9_45.1 [template = constants.%.4]
    163. 

  163. // CHECK:STDOUT:   %.loc9_45.2: i32 = converted %.loc9_45.1, %.loc9_17.2 [template = constants.%.4]
    164. 

  164. // CHECK:STDOUT:   %.loc9_17.3: init i32 = call %Mod.ref.loc9(%.loc9_24.2, %.loc9_45.2) [template = constants.%.5]
    165. 

  165. // CHECK:STDOUT:   %.loc9_49: i32 = value_of_initializer %.loc9_17.3 [template = constants.%.5]
    166. 

  166. // CHECK:STDOUT:   %.loc9_17.4: i32 = converted %.loc9_17.3, %.loc9_49 [template = constants.%.5]
    167. 

  167. // CHECK:STDOUT:   %a.loc9: i32 = bind_name a, %.loc9_17.4
    168. 

  168. // CHECK:STDOUT:   %Mod.ref.loc12: <function> = name_ref Mod, %Mod [template = %Mod]
    169. 

  169. // CHECK:STDOUT:   %Sub.ref.loc12: <function> = name_ref Sub, %Sub [template = %Sub]
    170. 

  170. // CHECK:STDOUT:   %Negate.ref.loc12: <function> = name_ref Negate, %Negate [template = %Negate]
    171. 

  171. // CHECK:STDOUT:   %.loc12_29: i32 = int_literal 2147483647 [template = constants.%.1]
    172. 

  172. // CHECK:STDOUT:   %.loc12_28.1: init i32 = call %Negate.ref.loc12(%.loc12_29) [template = constants.%.2]
    173. 

  173. // CHECK:STDOUT:   %.loc12_43: i32 = int_literal 1 [template = constants.%.3]
    174. 

  174. // CHECK:STDOUT:   %.loc12_21.1: i32 = value_of_initializer %.loc12_28.1 [template = constants.%.2]
    175. 

  175. // CHECK:STDOUT:   %.loc12_28.2: i32 = converted %.loc12_28.1, %.loc12_21.1 [template = constants.%.2]
    176. 

  176. // CHECK:STDOUT:   %.loc12_21.2: init i32 = call %Sub.ref.loc12(%.loc12_28.2, %.loc12_43) [template = constants.%.6]
    177. 

  177. // CHECK:STDOUT:   %.loc12_47: i32 = int_literal 1 [template = constants.%.3]
    178. 

  178. // CHECK:STDOUT:   %.loc12_17.1: i32 = value_of_initializer %.loc12_21.2 [template = constants.%.6]
    179. 

  179. // CHECK:STDOUT:   %.loc12_21.3: i32 = converted %.loc12_21.2, %.loc12_17.1 [template = constants.%.6]
    180. 

  180. // CHECK:STDOUT:   %.loc12_17.2: init i32 = call %Mod.ref.loc12(%.loc12_21.3, %.loc12_47) [template = constants.%.5]
    181. 

  181. // CHECK:STDOUT:   %.loc12_49: i32 = value_of_initializer %.loc12_17.2 [template = constants.%.5]
    182. 

  182. // CHECK:STDOUT:   %.loc12_17.3: i32 = converted %.loc12_17.2, %.loc12_49 [template = constants.%.5]
    183. 

  183. // CHECK:STDOUT:   %b.loc12: i32 = bind_name b, %.loc12_17.3
    184. 

  184. // CHECK:STDOUT:   %Mod.ref.loc20: <function> = name_ref Mod, %Mod [template = %Mod]
    185. 

  185. // CHECK:STDOUT:   %Sub.ref.loc20: <function> = name_ref Sub, %Sub [template = %Sub]
    186. 

  186. // CHECK:STDOUT:   %Negate.ref.loc20_22: <function> = name_ref Negate, %Negate [template = %Negate]
    187. 

  187. // CHECK:STDOUT:   %.loc20_29: i32 = int_literal 2147483647 [template = constants.%.1]
    188. 

  188. // CHECK:STDOUT:   %.loc20_28.1: init i32 = call %Negate.ref.loc20_22(%.loc20_29) [template = constants.%.2]
    189. 

  189. // CHECK:STDOUT:   %.loc20_43: i32 = int_literal 1 [template = constants.%.3]
    190. 

  190. // CHECK:STDOUT:   %.loc20_21.1: i32 = value_of_initializer %.loc20_28.1 [template = constants.%.2]
    191. 

  191. // CHECK:STDOUT:   %.loc20_28.2: i32 = converted %.loc20_28.1, %.loc20_21.1 [template = constants.%.2]
    192. 

  192. // CHECK:STDOUT:   %.loc20_21.2: init i32 = call %Sub.ref.loc20(%.loc20_28.2, %.loc20_43) [template = constants.%.6]
    193. 

  193. // CHECK:STDOUT:   %Negate.ref.loc20_47: <function> = name_ref Negate, %Negate [template = %Negate]
    194. 

  194. // CHECK:STDOUT:   %.loc20_54: i32 = int_literal 1 [template = constants.%.3]
    195. 

  195. // CHECK:STDOUT:   %.loc20_53.1: init i32 = call %Negate.ref.loc20_47(%.loc20_54) [template = constants.%.4]
    196. 

  196. // CHECK:STDOUT:   %.loc20_17.1: i32 = value_of_initializer %.loc20_21.2 [template = constants.%.6]
    197. 

  197. // CHECK:STDOUT:   %.loc20_21.3: i32 = converted %.loc20_21.2, %.loc20_17.1 [template = constants.%.6]
    198. 

  198. // CHECK:STDOUT:   %.loc20_17.2: i32 = value_of_initializer %.loc20_53.1 [template = constants.%.4]
    199. 

  199. // CHECK:STDOUT:   %.loc20_53.2: i32 = converted %.loc20_53.1, %.loc20_17.2 [template = constants.%.4]
    200. 

  200. // CHECK:STDOUT:   %.loc20_17.3: init i32 = call %Mod.ref.loc20(%.loc20_21.3, %.loc20_53.2) [template = constants.%.5]
    201. 

  201. // CHECK:STDOUT:   %.loc20_57: i32 = value_of_initializer %.loc20_17.3 [template = constants.%.5]
    202. 

  202. // CHECK:STDOUT:   %.loc20_17.4: i32 = converted %.loc20_17.3, %.loc20_57 [template = constants.%.5]
    203. 

  203. // CHECK:STDOUT:   %c: i32 = bind_name c, %.loc20_17.4
    204. 

  204. // CHECK:STDOUT: }
    205. 

  205. // CHECK:STDOUT:
    206. 

  206. // CHECK:STDOUT: fn @Mod(%a: i32, %b: i32) -> i32 = "int.mod";
    207. 

  207. // CHECK:STDOUT:
    208. 

  208. // CHECK:STDOUT: fn @Sub(%a: i32, %b: i32) -> i32 = "int.sub";
    209. 

  209. // CHECK:STDOUT:
    210. 

  210. // CHECK:STDOUT: fn @Negate(%a: i32) -> i32 = "int.negate";
    211. 

  211. // CHECK:STDOUT:
    212. 

  212. // CHECK:STDOUT: --- fail_div_by_zero.carbon
    213. 

  213. // CHECK:STDOUT:
    214. 

  214. // CHECK:STDOUT: constants {
    215. 

  215. // CHECK:STDOUT:   %.1: i32 = int_literal 1 [template]
    216. 

  216. // CHECK:STDOUT:   %.2: i32 = int_literal 0 [template]
    217. 

  217. // CHECK:STDOUT: }
    218. 

  218. // CHECK:STDOUT:
    219. 

  219. // CHECK:STDOUT: file {
    220. 

  220. // CHECK:STDOUT:   package: <namespace> = namespace [template] {
    221. 

  221. // CHECK:STDOUT:     .Mod = %Mod
    222. 

  222. // CHECK:STDOUT:   }
    223. 

  223. // CHECK:STDOUT:   %Mod: <function> = fn_decl @Mod [template] {
    224. 

  224. // CHECK:STDOUT:     %a.loc4_8.1: i32 = param a
    225. 

  225. // CHECK:STDOUT:     @Mod.%a: i32 = bind_name a, %a.loc4_8.1
    226. 

  226. // CHECK:STDOUT:     %b.loc4_16.1: i32 = param b
    227. 

  227. // CHECK:STDOUT:     @Mod.%b: i32 = bind_name b, %b.loc4_16.1
    228. 

  228. // CHECK:STDOUT:     %return.var: ref i32 = var <return slot>
    229. 

  229. // CHECK:STDOUT:   }
    230. 

  230. // CHECK:STDOUT:   %Mod.ref.loc12: <function> = name_ref Mod, %Mod [template = %Mod]
    231. 

  231. // CHECK:STDOUT:   %.loc12_18: i32 = int_literal 1 [template = constants.%.1]
    232. 

  232. // CHECK:STDOUT:   %.loc12_21: i32 = int_literal 0 [template = constants.%.2]
    233. 

  233. // CHECK:STDOUT:   %.loc12_17.1: init i32 = call %Mod.ref.loc12(%.loc12_18, %.loc12_21) [template = <error>]
    234. 

  234. // CHECK:STDOUT:   %.loc12_23: i32 = value_of_initializer %.loc12_17.1 [template = <error>]
    235. 

  235. // CHECK:STDOUT:   %.loc12_17.2: i32 = converted %.loc12_17.1, %.loc12_23 [template = <error>]
    236. 

  236. // CHECK:STDOUT:   %a.loc12: i32 = bind_name a, %.loc12_17.2
    237. 

  237. // CHECK:STDOUT:   %Mod.ref.loc17: <function> = name_ref Mod, %Mod [template = %Mod]
    238. 

  238. // CHECK:STDOUT:   %.loc17_18: i32 = int_literal 0 [template = constants.%.2]
    239. 

  239. // CHECK:STDOUT:   %.loc17_21: i32 = int_literal 0 [template = constants.%.2]
    240. 

  240. // CHECK:STDOUT:   %.loc17_17.1: init i32 = call %Mod.ref.loc17(%.loc17_18, %.loc17_21) [template = <error>]
    241. 

  241. // CHECK:STDOUT:   %.loc17_23: i32 = value_of_initializer %.loc17_17.1 [template = <error>]
    242. 

  242. // CHECK:STDOUT:   %.loc17_17.2: i32 = converted %.loc17_17.1, %.loc17_23 [template = <error>]
    243. 

  243. // CHECK:STDOUT:   %b.loc17: i32 = bind_name b, %.loc17_17.2
    244. 

  244. // CHECK:STDOUT: }
    245. 

  245. // CHECK:STDOUT:
    246. 

  246. // CHECK:STDOUT: fn @Mod(%a: i32, %b: i32) -> i32 = "int.mod";
    247. 

  247. // CHECK:STDOUT:
    248.