fixed_point_add.c 21.4 KB
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433
// RUN: %clang_cc1 -ffixed-point -triple x86_64-unknown-linux-gnu -S -emit-llvm %s -o - | FileCheck %s --check-prefixes=CHECK,SIGNED
// RUN: %clang_cc1 -ffixed-point -triple x86_64-unknown-linux-gnu -fpadding-on-unsigned-fixed-point -S -emit-llvm %s -o - | FileCheck %s --check-prefixes=CHECK,UNSIGNED

// Addition between different fixed point types
short _Accum sa_const = 1.0hk + 2.0hk;  // CHECK-DAG: @sa_const  = {{.*}}global i16 384, align 2
_Accum a_const = 1.0hk + 2.0k;          // CHECK-DAG: @a_const   = {{.*}}global i32 98304, align 4
long _Accum la_const = 1.0hk + 2.0lk;   // CHECK-DAG: @la_const  = {{.*}}global i64 6442450944, align 8
short _Accum sa_const2 = 0.5hr + 2.0hk; // CHECK-DAG: @sa_const2  = {{.*}}global i16 320, align 2
short _Accum sa_const3 = 0.5r + 2.0hk;  // CHECK-DAG: @sa_const3  = {{.*}}global i16 320, align 2
short _Accum sa_const4 = 0.5lr + 2.0hk; // CHECK-DAG: @sa_const4  = {{.*}}global i16 320, align 2

// Unsigned addition
unsigned short _Accum usa_const = 1.0uhk + 2.0uhk;
// CHECK-SIGNED-DAG:   @usa_const = {{.*}}global i16 768, align 2
// CHECK-UNSIGNED-DAG: @usa_const = {{.*}}global i16 384, align 2

// Unsigned + signed
short _Accum sa_const5 = 1.0uhk + 2.0hk;
// CHECK-DAG: @sa_const5 = {{.*}}global i16 384, align 2

// Addition with negative number
short _Accum sa_const6 = 0.5hr + (-2.0hk);
// CHECK-DAG: @sa_const6 = {{.*}}global i16 -192, align 2

// Int addition
unsigned short _Accum usa_const2 = 2 + 0.5uhk;
// CHECK-SIGNED-DAG:   @usa_const2 = {{.*}}global i16 640, align 2
// CHECK-UNSIGNED-DAG: @usa_const2 = {{.*}}global i16 320, align 2
short _Accum sa_const7 = 2 + (-0.5hk);   // CHECK-DAG: @sa_const7 = {{.*}}global i16 192, align 2
short _Accum sa_const8 = 257 + (-2.0hk); // CHECK-DAG: @sa_const8 = {{.*}}global i16 32640, align 2
long _Fract lf_const = -0.5lr + 1;       // CHECK-DAG: @lf_const  = {{.*}}global i32 1073741824, align 4

// Saturated addition
_Sat short _Accum sat_sa_const = (_Sat short _Accum)128.0hk + 128.0hk;
// CHECK-DAG: @sat_sa_const = {{.*}}global i16 32767, align 2
_Sat unsigned short _Accum sat_usa_const = (_Sat unsigned short _Accum)128.0uhk + 128.0uhk;
// CHECK-SIGNED-DAG:   @sat_usa_const = {{.*}}global i16 65535, align 2
// CHECK-UNSIGNED-DAG: @sat_usa_const = {{.*}}global i16 32767, align 2
_Sat short _Accum sat_sa_const2 = (_Sat short _Accum)128.0hk + 128;
// CHECK-DAG: @sat_sa_const2 = {{.*}}global i16 32767, align 2
_Sat unsigned short _Accum sat_usa_const2 = (_Sat unsigned short _Accum)128.0uhk + 128;
// CHECK-SIGNED-DAG:   @sat_usa_const2 = {{.*}}global i16 65535, align 2
// CHECK-UNSIGNED-DAG: @sat_usa_const2 = {{.*}}global i16 32767, align 2
_Sat unsigned short _Accum sat_usa_const3 = (_Sat unsigned short _Accum)0.5uhk + (-2);
// CHECK-DAG:   @sat_usa_const3 = {{.*}}global i16 0, align 2

void SignedAddition() {
  // CHECK-LABEL: SignedAddition
  short _Accum sa;
  _Accum a, b, c, d;
  long _Accum la;
  unsigned short _Accum usa;
  unsigned _Accum ua;
  unsigned long _Accum ula;

  short _Fract sf;
  _Fract f;
  long _Fract lf;
  unsigned short _Fract usf;
  unsigned _Fract uf;
  unsigned long _Fract ulf;

  // Same type
  // CHECK:      [[SA:%[0-9]+]] = load i16, i16* %sa, align 2
  // CHECK-NEXT: [[SA2:%[0-9]+]] = load i16, i16* %sa, align 2
  // CHECK-NEXT: [[SUM:%[0-9]+]] = add i16 [[SA]], [[SA2]]
  // CHECK-NEXT: store i16 [[SUM]], i16* %sa, align 2
  sa = sa + sa;

  // To larger scale and larger width
  // CHECK:      [[SA:%[0-9]+]] = load i16, i16* %sa, align 2
  // CHECK-NEXT: [[A:%[0-9]+]] = load i32, i32* %a, align 4
  // CHECK-NEXT: [[EXT_SA:%[a-z0-9]+]] = sext i16 [[SA]] to i32
  // CHECK-NEXT: [[SA:%[a-z0-9]+]] = shl i32 [[EXT_SA]], 8
  // CHECK-NEXT: [[SUM:%[0-9]+]] = add i32 [[SA]], [[A]]
  // CHECK-NEXT: store i32 [[SUM]], i32* %a, align 4
  a = sa + a;

  // To same scale and smaller width
  // CHECK:      [[SA:%[0-9]+]] = load i16, i16* %sa, align 2
  // CHECK-NEXT: [[SF:%[0-9]+]] = load i8, i8* %sf, align 1
  // CHECK-NEXT: [[EXT_SF:%[a-z0-9]+]] = sext i8 [[SF]] to i16
  // CHECK-NEXT: [[SUM:%[0-9]+]] = add i16 [[SA]], [[EXT_SF]]
  // CHECK-NEXT: store i16 [[SUM]], i16* %sa, align 2
  sa = sa + sf;

  // To smaller scale and same width.
  // CHECK:      [[SA:%[0-9]+]] = load i16, i16* %sa, align 2
  // CHECK-NEXT: [[F:%[0-9]+]] = load i16, i16* %f, align 2
  // CHECK-NEXT: [[EXT_SA:%[a-z0-9]+]] = sext i16 [[SA]] to i24
  // CHECK-NEXT: [[SA:%[a-z0-9]+]] = shl i24 [[EXT_SA]], 8
  // CHECK-NEXT: [[EXT_F:%[a-z0-9]+]] = sext i16 [[F]] to i24
  // CHECK-NEXT: [[SUM:%[0-9]+]] = add i24 [[SA]], [[EXT_F]]
  // CHECK-NEXT: [[RES:%[a-z0-9]+]] = ashr i24 [[SUM]], 8
  // CHECK-NEXT: [[TRUNC_RES:%[a-z0-9]+]] = trunc i24 [[RES]] to i16
  // CHECK-NEXT: store i16 [[TRUNC_RES]], i16* %sa, align 2
  sa = sa + f;

  // To smaller scale and smaller width
  // CHECK:      [[A:%[0-9]+]] = load i32, i32* %a, align 4
  // CHECK-NEXT: [[SF:%[0-9]+]] = load i8, i8* %sf, align 1
  // CHECK-NEXT: [[EXT_SF:%[a-z0-9]+]] = sext i8 [[SF]] to i32
  // CHECK-NEXT: [[SF:%[a-z0-9]+]] = shl i32 [[EXT_SF]], 8
  // CHECK-NEXT: [[SUM:%[0-9]+]] = add i32 [[A]], [[SF]]
  // CHECK-NEXT: store i32 [[SUM]], i32* %a, align 4
  a = a + sf;

  // To larger scale and same width
  // CHECK:      [[A:%[0-9]+]] = load i32, i32* %a, align 4
  // CHECK-NEXT: [[LF:%[0-9]+]] = load i32, i32* %lf, align 4
  // CHECK-NEXT: [[EXT_A:%[a-z0-9]+]] = sext i32 [[A]] to i48
  // CHECK-NEXT: [[A:%[a-z0-9]+]] = shl i48 [[EXT_A]], 16
  // CHECK-NEXT: [[EXT_LF:%[a-z0-9]+]] = sext i32 [[LF]] to i48
  // CHECK-NEXT: [[SUM:%[0-9]+]] = add i48 [[A]], [[EXT_LF]]
  // CHECK-NEXT: [[RES:%[a-z0-9]+]] = ashr i48 [[SUM]], 16
  // CHECK-NEXT: [[TRUNC_RES:%[a-z0-9]+]] = trunc i48 [[RES]] to i32
  // CHECK-NEXT: store i32 [[TRUNC_RES]], i32* %a, align 4
  a = a + lf;

  // With corresponding unsigned type
  // CHECK:      [[SA:%[0-9]+]] = load i16, i16* %sa, align 2
  // CHECK-NEXT: [[USA:%[0-9]+]] = load i16, i16* %usa, align 2
  // SIGNED-NEXT: [[SA_EXT:%[a-z0-9]+]] = sext i16 [[SA]] to i17
  // SIGNED-NEXT: [[SA:%[a-z0-9]+]] = shl i17 [[SA_EXT]], 1
  // SIGNED-NEXT: [[USA_EXT:%[a-z0-9]+]] = zext i16 [[USA]] to i17
  // SIGNED-NEXT: [[SUM:%[0-9]+]] = add i17 [[SA]], [[USA_EXT]]
  // SIGNED-NEXT: [[RESULT:%[a-z0-9]+]] = ashr i17 [[SUM]], 1
  // SIGNED-NEXT: [[SUM:%[a-z0-9]+]] = trunc i17 [[RESULT]] to i16
  // UNSIGNED-NEXT: [[SUM:%[0-9]+]] = add i16 [[SA]], [[USA]]
  // CHECK-NEXT: store i16 [[SUM]], i16* %sa, align 2
  sa = sa + usa;

  // With unsigned of larger scale
  // CHECK:      [[SA:%[0-9]+]] = load i16, i16* %sa, align 2
  // CHECK-NEXT: [[USA:%[0-9]+]] = load i32, i32* %ua, align 4
  // SIGNED-NEXT: [[SA_EXT:%[a-z0-9]+]] = sext i16 [[SA]] to i33
  // SIGNED-NEXT: [[SA:%[a-z0-9]+]] = shl i33 [[SA_EXT]], 9
  // SIGNED-NEXT: [[USA_EXT:%[a-z0-9]+]] = zext i32 [[USA]] to i33
  // SIGNED-NEXT: [[SUM:%[0-9]+]] = add i33 [[SA]], [[USA_EXT]]
  // SIGNED-NEXT: [[RESULT:%[a-z0-9]+]] = ashr i33 [[SUM]], 1
  // SIGNED-NEXT: [[SUM:%[a-z0-9]+]] = trunc i33 [[RESULT]] to i32
  // UNSIGNED-NEXT: [[EXT_SA:%[a-z0-9]+]] = sext i16 [[SA]] to i32
  // UNSIGNED-NEXT: [[SA:%[a-z0-9]+]] = shl i32 [[EXT_SA]], 8
  // UNSIGNED-NEXT: [[SUM:%[0-9]+]] = add i32 [[SA]], [[USA]]
  // CHECK-NEXT: store i32 [[SUM]], i32* %a, align 4
  a = sa + ua;

  // With unsigned of smaller width
  // CHECK:      [[SA:%[0-9]+]] = load i16, i16* %sa, align 2
  // CHECK-NEXT: [[USF:%[0-9]+]] = load i8, i8* %usf, align 1
  // SIGNED-NEXT: [[SA_EXT:%[a-z0-9]+]] = sext i16 [[SA]] to i17
  // SIGNED-NEXT: [[SA:%[a-z0-9]+]] = shl i17 [[SA_EXT]], 1
  // SIGNED-NEXT: [[USF_EXT:%[a-z0-9]+]] = zext i8 [[USF]] to i17
  // SIGNED-NEXT: [[SUM:%[0-9]+]] = add i17 [[SA]], [[USF_EXT]]
  // SIGNED-NEXT: [[RESULT:%[a-z0-9]+]] = ashr i17 [[SUM]], 1
  // SIGNED-NEXT: [[SUM:%[a-z0-9]+]] = trunc i17 [[RESULT]] to i16
  // UNSIGNED-NEXT: [[EXT_USF:%[a-z0-9]+]] = zext i8 [[USF]] to i16
  // UNSIGNED-NEXT: [[SUM:%[0-9]+]] = add i16 [[SA]], [[EXT_USF]]
  // CHECK-NEXT: store i16 [[SUM]], i16* %sa, align 2
  sa = sa + usf;

  // With unsigned of larger width and smaller scale
  // CHECK:      [[SA:%[0-9]+]] = load i16, i16* %sa, align 2
  // CHECK-NEXT: [[ULF:%[0-9]+]] = load i32, i32* %ulf, align 4
  // SIGNED-NEXT: [[SA_EXT:%[a-z0-9]+]] = sext i16 [[SA]] to i41
  // SIGNED-NEXT: [[SA:%[a-z0-9]+]] = shl i41 [[SA_EXT]], 25
  // SIGNED-NEXT: [[ULF_EXT:%[a-z0-9]+]] = zext i32 [[ULF]] to i41
  // SIGNED-NEXT: [[SUM:%[0-9]+]] = add i41 [[SA]], [[ULF_EXT]]
  // SIGNED-NEXT: [[RESULT:%[a-z0-9]+]] = ashr i41 [[SUM]], 25
  // SIGNED-NEXT: [[RES_TRUNC:%[a-z0-9]+]] = trunc i41 [[RESULT]] to i16
  // UNSIGNED-NEXT: [[EXT_SA:%[a-z0-9]+]] = sext i16 [[SA]] to i40
  // UNSIGNED-NEXT: [[SA:%[a-z0-9]+]] = shl i40 [[EXT_SA]], 24
  // UNSIGNED-NEXT: [[EXT_ULF:%[a-z0-9]+]] = zext i32 [[ULF]] to i40
  // UNSIGNED-NEXT: [[SUM:%[0-9]+]] = add i40 [[SA]], [[EXT_ULF]]
  // UNSIGNED-NEXT: [[RES:%[a-z0-9]+]] = ashr i40 [[SUM]], 24
  // UNSIGNED-NEXT: [[RES_TRUNC:%[a-z0-9]+]] = trunc i40 [[RES]] to i16
  // CHECK-NEXT: store i16 [[RES_TRUNC]], i16* %sa, align 2
  sa = sa + ulf;

  // Chained additions of the same signed type should result in the same
  // semantics width.
  // CHECK:      [[A:%[0-9]+]] = load i32, i32* %a, align 4
  // CHECK-NEXT: [[B:%[0-9]+]] = load i32, i32* %b, align 4
  // CHECK-NEXT: [[SUM:%[0-9]+]] = add i32 [[A]], [[B]]
  // CHECK-NEXT: [[C:%[0-9]+]] = load i32, i32* %c, align 4
  // CHECK-NEXT: [[SUM2:%[0-9]+]] = add i32 [[SUM]], [[C]]
  // CHECK-NEXT: [[D:%[0-9]+]] = load i32, i32* %d, align 4
  // CHECK-NEXT: [[SUM3:%[0-9]+]] = add i32 [[SUM2]], [[D]]
  // CHECK-NEXT: store i32 [[SUM3]], i32* %a, align 4
  a = a + b + c + d;
}

void UnsignedAddition() {
  // CHECK-LABEL: UnsignedAddition
  unsigned short _Accum usa;
  unsigned _Accum ua;
  unsigned long _Accum ula;

  unsigned short _Fract usf;
  unsigned _Fract uf;
  unsigned long _Fract ulf;

  // CHECK:      [[USA:%[0-9]+]] = load i16, i16* %usa, align 2
  // CHECK-NEXT: [[USA2:%[0-9]+]] = load i16, i16* %usa, align 2
  // CHECK-NEXT: [[SUM:%[0-9]+]] = add i16 [[USA]], [[USA2]]
  // CHECK-NEXT: store i16 [[SUM]], i16* %usa, align 2
  usa = usa + usa;

  // CHECK:      [[USA:%[0-9]+]] = load i16, i16* %usa, align 2
  // CHECK-NEXT: [[UA:%[0-9]+]] = load i32, i32* %ua, align 4
  // CHECK-NEXT: [[EXT_USA:%[a-z0-9]+]] = zext i16 [[USA]] to i32
  // CHECK-NEXT: [[USA:%[a-z0-9]+]] = shl i32 [[EXT_USA]], 8
  // CHECK-NEXT: [[SUM:%[0-9]+]] = add i32 [[USA]], [[UA]]
  // CHECK-NEXT: store i32 [[SUM]], i32* %ua, align 4
  ua = usa + ua;

  // CHECK:      [[USA:%[0-9]+]] = load i16, i16* %usa, align 2
  // CHECK-NEXT: [[USF:%[0-9]+]] = load i8, i8* %usf, align 1
  // CHECK-NEXT: [[EXT_USF:%[a-z0-9]+]] = zext i8 [[USF]] to i16
  // CHECK-NEXT: [[SUM:%[0-9]+]] = add i16 [[USA]], [[EXT_USF]]
  // CHECK-NEXT: store i16 [[SUM]], i16* %usa, align 2
  usa = usa + usf;

  // CHECK:      [[USA:%[0-9]+]] = load i16, i16* %usa, align 2
  // CHECK-NEXT: [[UF:%[0-9]+]] = load i16, i16* %uf, align 2
  // CHECK-NEXT: [[USA_EXT:%[a-z0-9]+]] = zext i16 [[USA]] to i24
  // CHECK-NEXT: [[USA:%[a-z0-9]+]] = shl i24 [[USA_EXT]], 8
  // CHECK-NEXT: [[UF_EXT:%[a-z0-9]+]] = zext i16 [[UF]] to i24
  // CHECK-NEXT: [[SUM:%[0-9]+]] = add i24 [[USA]], [[UF_EXT]]
  // CHECK-NEXT: [[RES:%[a-z0-9]+]] = lshr i24 [[SUM]], 8
  // CHECK-NEXT: [[RES_TRUNC:%[a-z0-9]+]] = trunc i24 [[RES]] to i16
  // CHECK-NEXT: store i16 [[RES_TRUNC]], i16* %usa, align 2
  usa = usa + uf;
}

void IntAddition() {
  // CHECK-LABEL: IntAddition
  short _Accum sa;
  _Accum a;
  unsigned short _Accum usa;
  _Sat short _Accum sa_sat;
  int i;
  unsigned int ui;
  long _Fract lf;
  _Bool b;

  // CHECK:      [[SA:%[0-9]+]] = load i16, i16* %sa, align 2
  // CHECK-NEXT: [[I:%[0-9]+]] = load i32, i32* %i, align 4
  // CHECK-NEXT: [[SA_EXT:%[a-z0-9]+]] = sext i16 [[SA]] to i39
  // CHECK-NEXT: [[I_EXT:%[a-z0-9]+]] = sext i32 [[I]] to i39
  // CHECK-NEXT: [[I:%[a-z0-9]+]] = shl i39 [[I_EXT]], 7
  // CHECK-NEXT: [[SUM:%[0-9]+]] = add i39 [[SA_EXT]], [[I]]
  // CHECK-NEXT: [[RES:%[a-z0-9]+]] = trunc i39 [[SUM]] to i16
  // CHECK-NEXT: store i16 [[RES]], i16* %sa, align 2
  sa = sa + i;

  // CHECK:      [[SA:%[0-9]+]] = load i16, i16* %sa, align 2
  // CHECK-NEXT: [[UI:%[0-9]+]] = load i32, i32* %ui, align 4
  // CHECK-NEXT: [[SA_EXT:%[a-z0-9]+]] = sext i16 [[SA]] to i40
  // CHECK-NEXT: [[UI_EXT:%[a-z0-9]+]] = zext i32 [[UI]] to i40
  // CHECK-NEXT: [[UI:%[a-z0-9]+]] = shl i40 [[UI_EXT]], 7
  // CHECK-NEXT: [[SUM:%[0-9]+]] = add i40 [[SA_EXT]], [[UI]]
  // CHECK-NEXT: [[RES:%[a-z0-9]+]] = trunc i40 [[SUM]] to i16
  // CHECK-NEXT: store i16 [[RES]], i16* %sa, align 2
  sa = sa + ui;

  // CHECK:      [[USA:%[0-9]+]] = load i16, i16* %usa, align 2
  // CHECK-NEXT: [[I:%[0-9]+]] = load i32, i32* %i, align 4
  // SIGNED-NEXT: [[USA_EXT:%[a-z0-9]+]] = zext i16 [[USA]] to i40
  // SIGNED-NEXT: [[I_EXT:%[a-z0-9]+]] = sext i32 [[I]] to i40
  // SIGNED-NEXT: [[I:%[a-z0-9]+]] = shl i40 [[I_EXT]], 8
  // SIGNED-NEXT: [[SUM:%[0-9]+]] = add i40 [[USA_EXT]], [[I]]
  // SIGNED-NEXT: [[RES:%[a-z0-9]+]] = trunc i40 [[SUM]] to i16
  // UNSIGNED-NEXT: [[USA_EXT:%[a-z0-9]+]] = zext i16 [[USA]] to i39
  // UNSIGNED-NEXT: [[I_EXT:%[a-z0-9]+]] = sext i32 [[I]] to i39
  // UNSIGNED-NEXT: [[I:%[a-z0-9]+]] = shl i39 [[I_EXT]], 7
  // UNSIGNED-NEXT: [[SUM:%[0-9]+]] = add i39 [[USA_EXT]], [[I]]
  // UNSIGNED-NEXT: [[RES:%[a-z0-9]+]] = trunc i39 [[SUM]] to i16
  // CHECK-NEXT: store i16 [[RES]], i16* %usa, align 2
  usa = usa + i;

  // CHECK:      [[USA:%[0-9]+]] = load i16, i16* %usa, align 2
  // CHECK-NEXT: [[I:%[0-9]+]] = load i32, i32* %ui, align 4
  // SIGNED-NEXT: [[USA_EXT:%[a-z0-9]+]] = zext i16 [[USA]] to i40
  // SIGNED-NEXT: [[I_EXT:%[a-z0-9]+]] = zext i32 [[I]] to i40
  // SIGNED-NEXT: [[I:%[a-z0-9]+]] = shl i40 [[I_EXT]], 8
  // SIGNED-NEXT: [[SUM:%[0-9]+]] = add i40 [[USA_EXT]], [[I]]
  // SIGNED-NEXT: [[RES:%[a-z0-9]+]] = trunc i40 [[SUM]] to i16
  // UNSIGNED-NEXT: [[USA_EXT:%[a-z0-9]+]] = zext i16 [[USA]] to i39
  // UNSIGNED-NEXT: [[I_EXT:%[a-z0-9]+]] = zext i32 [[I]] to i39
  // UNSIGNED-NEXT: [[I:%[a-z0-9]+]] = shl i39 [[I_EXT]], 7
  // UNSIGNED-NEXT: [[SUM:%[0-9]+]] = add i39 [[USA_EXT]], [[I]]
  // UNSIGNED-NEXT: [[RES:%[a-z0-9]+]] = trunc i39 [[SUM]] to i16
  // CHECK-NEXT: store i16 [[RES]], i16* %usa, align 2
  usa = usa + ui;

  // CHECK:      [[LF:%[0-9]+]] = load i32, i32* %lf, align 4
  // CHECK-NEXT: [[UI:%[0-9]+]] = load i32, i32* %ui, align 4
  // CHECK-NEXT: [[LF_EXT:%[a-z0-9]+]] = sext i32 [[LF]] to i64
  // CHECK-NEXT: [[UI_EXT:%[a-z0-9]+]] = zext i32 [[UI]] to i64
  // CHECK-NEXT: [[UI:%[a-z0-9]+]] = shl i64 [[UI_EXT]], 31
  // CHECK-NEXT: [[SUM:%[0-9]+]] = add i64 [[LF_EXT]], [[UI]]
  // CHECK-NEXT: [[RES:%[a-z0-9]+]] = trunc i64 [[SUM]] to i32
  // CHECK-NEXT: store i32 [[RES]], i32* %lf, align 4
  lf = lf + ui;

  // CHECK:      [[ACCUM:%[0-9]+]] = load i32, i32* %a, align 4
  // CHECK-NEXT: [[BOOL:%[0-9]+]] = load i8, i8* %b, align 1
  // CHECK-NEXT: [[AS_BOOL:%[a-z0-9]+]] = trunc i8 [[BOOL]] to i1
  // CHECK-NEXT: [[BOOL_EXT:%[a-z0-9]+]] = zext i1 [[AS_BOOL]] to i32
  // CHECK-NEXT: [[ACCUM_EXT:%[a-z0-9]+]] = sext i32 [[ACCUM]] to i47
  // CHECK-NEXT: [[BOOL:%[a-z0-9]+]] = sext i32 [[BOOL_EXT]] to i47
  // CHECK-NEXT: [[BOOL_EXT:%[a-z0-9]+]] = shl i47 [[BOOL]], 15
  // CHECK-NEXT: [[SUM:%[0-9]+]] = add i47 [[ACCUM_EXT]], [[BOOL_EXT]]
  // CHECK-NEXT: [[RESULT:%[a-z0-9]+]] = trunc i47 [[SUM]] to i32
  // CHECK-NEXT: store i32 [[RESULT]], i32* %a, align 4
  a = a + b;
}

void SaturatedAddition() {
  // CHECK-LABEL: SaturatedAddition
  short _Accum sa;
  _Accum a;
  long _Accum la;
  unsigned short _Accum usa;
  unsigned _Accum ua;
  unsigned long _Accum ula;

  _Sat short _Accum sa_sat;
  _Sat _Accum a_sat;
  _Sat long _Accum la_sat;
  _Sat unsigned short _Accum usa_sat;
  _Sat unsigned _Accum ua_sat;
  _Sat unsigned long _Accum ula_sat;
  _Sat unsigned _Fract uf_sat;

  int i;
  unsigned int ui;

  // CHECK:      [[SA:%[0-9]+]] = load i16, i16* %sa, align 2
  // CHECK-NEXT: [[SA_SAT:%[0-9]+]] = load i16, i16* %sa_sat, align 2
  // CHECK-NEXT: [[SUM:%[0-9]+]] = call i16 @llvm.sadd.sat.i16(i16 [[SA]], i16
  // [[SA_SAT]])
  // CHECK-NEXT: store i16 [[SUM]], i16* %sa_sat, align 2
  sa_sat = sa + sa_sat;

  // CHECK:      [[USA:%[0-9]+]] = load i16, i16* %usa, align 2
  // CHECK-NEXT: [[USA_SAT:%[0-9]+]] = load i16, i16* %usa_sat, align 2
  // SIGNED-NEXT: [[SUM:%[0-9]+]] = call i16 @llvm.uadd.sat.i16(i16 [[USA]], i16 [[USA_SAT]])
  // SIGNED-NEXT: store i16 [[SUM]], i16* %usa_sat, align 2
  // UNSIGNED-NEXT: [[USA_TRUNC:%[a-z0-9]+]] = trunc i16 [[USA]] to i15
  // UNSIGNED-NEXT: [[USA_SAT_TRUNC:%[a-z0-9]+]] = trunc i16 [[USA_SAT]] to i15
  // UNSIGNED-NEXT: [[SUM:%[0-9]+]] = call i15 @llvm.uadd.sat.i15(i15 [[USA_TRUNC]], i15 [[USA_SAT_TRUNC]])
  // UNSIGNED-NEXT: [[SUM_EXT:%[a-z0-9]+]] = zext i15 [[SUM]] to i16
  // UNSIGNED-NEXT: store i16 [[SUM_EXT]], i16* %usa_sat, align 2
  usa_sat = usa + usa_sat;

  // CHECK:      [[UA:%[0-9]+]] = load i32, i32* %ua, align 4
  // CHECK-NEXT: [[USA:%[0-9]+]] = load i16, i16* %usa_sat, align 2
  // SIGNED-NEXT: [[USA_EXT:%[a-z0-9]+]] = zext i16 [[USA]] to i32
  // SIGNED-NEXT: [[USA:%[a-z0-9]+]] = shl i32 [[USA_EXT]], 8
  // SIGNED-NEXT: [[SUM:%[0-9]+]] = call i32 @llvm.uadd.sat.i32(i32 [[UA]], i32 [[USA]])
  // SIGNED-NEXT: store i32 [[SUM]], i32* %ua_sat, align 4
  // UNSIGNED-NEXT: [[UA_TRUNC:%[a-z0-9]+]] = trunc i32 [[UA]] to i31
  // UNSIGNED-NEXT: [[USA_EXT:%[a-z0-9]+]] = zext i16 [[USA]] to i31
  // UNSIGNED-NEXT: [[USA:%[a-z0-9]+]] = shl i31 [[USA_EXT]], 8
  // UNSIGNED-NEXT: [[SUM:%[0-9]+]] = call i31 @llvm.uadd.sat.i31(i31 [[UA_TRUNC]], i31 [[USA]])
  // UNSIGNED-NEXT: [[SUM_EXT:%[a-z0-9]+]] = zext i31 [[SUM]] to i32
  // UNSIGNED-NEXT: store i32 [[SUM_EXT]], i32* %ua_sat, align 4
  ua_sat = ua + usa_sat;

  // CHECK:      [[SA_SAT:%[0-9]+]] = load i16, i16* %sa_sat, align 2
  // CHECK-NEXT: [[I:%[0-9]+]] = load i32, i32* %i, align 4
  // CHECK-NEXT: [[SA_SAT_EXT:%[a-z0-9]+]] = sext i16 [[SA_SAT]] to i39
  // CHECK-NEXT: [[I_EXT:%[a-z0-9]+]] = sext i32 [[I]] to i39
  // CHECK-NEXT: [[I:%[a-z0-9]+]] = shl i39 [[I_EXT]], 7
  // CHECK-NEXT: [[SUM:%[0-9]+]] = call i39 @llvm.sadd.sat.i39(i39 [[SA_SAT_EXT]], i39 [[I]])
  // CHECK-NEXT: [[USE_MAX:%[0-9]+]] = icmp sgt i39 [[SUM]], 32767
  // CHECK-NEXT: [[RES:%[a-z0-9]+]] = select i1 [[USE_MAX]], i39 32767, i39 [[SUM]]
  // CHECK-NEXT: [[USE_MIN:%[0-9]+]] = icmp slt i39 [[RES]], -32768
  // CHECK-NEXT: [[RES2:%[a-z0-9]+]] = select i1 [[USE_MIN]], i39 -32768, i39 [[RES]]
  // CHECK-NEXT: [[RES3:%[a-z0-9]+]] = trunc i39 [[RES2]] to i16
  // CHECK-NEXT: store i16 [[RES3]], i16* %sa_sat, align 2
  sa_sat = sa_sat + i;

  // CHECK:      [[SA_SAT:%[0-9]+]] = load i16, i16* %sa_sat, align 2
  // CHECK-NEXT: [[I:%[0-9]+]] = load i32, i32* %ui, align 4
  // CHECK-NEXT: [[SA_SAT_EXT:%[a-z0-9]+]] = sext i16 [[SA_SAT]] to i40
  // CHECK-NEXT: [[I_EXT:%[a-z0-9]+]] = zext i32 [[I]] to i40
  // CHECK-NEXT: [[I:%[a-z0-9]+]] = shl i40 [[I_EXT]], 7
  // CHECK-NEXT: [[SUM:%[0-9]+]] = call i40 @llvm.sadd.sat.i40(i40 [[SA_SAT_EXT]], i40 [[I]])
  // CHECK-NEXT: [[USE_MAX:%[0-9]+]] = icmp sgt i40 [[SUM]], 32767
  // CHECK-NEXT: [[RES:%[a-z0-9]+]] = select i1 [[USE_MAX]], i40 32767, i40 [[SUM]]
  // CHECK-NEXT: [[USE_MIN:%[0-9]+]] = icmp slt i40 [[RES]], -32768
  // CHECK-NEXT: [[RES2:%[a-z0-9]+]] = select i1 [[USE_MIN]], i40 -32768, i40 [[RES]]
  // CHECK-NEXT: [[RES3:%[a-z0-9]+]] = trunc i40 [[RES2]] to i16
  // CHECK-NEXT: store i16 [[RES3]], i16* %sa_sat, align 2
  sa_sat = sa_sat + ui;

  // CHECK:      [[UF_SAT:%[0-9]+]] = load i16, i16* %uf_sat, align 2
  // CHECK-NEXT: [[UF_SAT2:%[0-9]+]] = load i16, i16* %uf_sat, align 2
  // SIGNED-NEXT: [[SUM:%[0-9]+]] = call i16 @llvm.uadd.sat.i16(i16 [[UF_SAT]], i16 [[UF_SAT2]])
  // SIGNED-NEXT: store i16 [[SUM]], i16* %uf_sat, align 2
  // UNSIGNED-NEXT: [[UF_SAT_TRUNC:%[a-z0-9]+]] = trunc i16 [[UF_SAT]] to i15
  // UNSIGNED-NEXT: [[UF_SAT_TRUNC2:%[a-z0-9]+]] = trunc i16 [[UF_SAT2]] to i15
  // UNSIGNED-NEXT: [[SUM:%[0-9]+]] = call i15 @llvm.uadd.sat.i15(i15 [[UF_SAT_TRUNC]], i15 [[UF_SAT_TRUNC2]])
  // UNSIGNED-NEXT: [[SUM_EXT:%[a-z0-9]+]] = zext i15 [[SUM]] to i16
  // UNSIGNED-NEXT: store i16 [[SUM_EXT]], i16* %uf_sat, align 2
  uf_sat = uf_sat + uf_sat;

  // CHECK:      [[USA_SAT:%[0-9]+]] = load i16, i16* %usa_sat, align 2
  // CHECK-NEXT: [[I:%[0-9]+]] = load i32, i32* %i, align 4
  // SIGNED-NEXT: [[USA_SAT_RESIZE:%[a-z0-9]+]] = zext i16 [[USA_SAT]] to i40
  // SIGNED-NEXT: [[I_RESIZE:%[a-z0-9]+]] = sext i32 [[I]] to i40
  // SIGNED-NEXT: [[I_UPSCALE:%[a-z0-9]+]] = shl i40 [[I_RESIZE]], 8
  // SIGNED-NEXT: [[SUM:%[0-9]+]] = call i40 @llvm.uadd.sat.i40(i40 [[USA_SAT_RESIZE]], i40 [[I_UPSCALE]])
  // SIGNED-NEXT: [[USE_MAX:%[0-9]+]] = icmp sgt i40 [[SUM]], 65535
  // SIGNED-NEXT: [[RESULT:%[a-z0-9]+]] = select i1 [[USE_MAX]], i40 65535, i40 [[SUM]]
  // SIGNED-NEXT: [[USE_MIN:%[0-9]+]] = icmp slt i40 [[RESULT]], 0
  // SIGNED-NEXT: [[RESULT2:%[a-z0-9]+]] = select i1 [[USE_MIN]], i40 0, i40 [[RESULT]]
  // SIGNED-NEXT: [[RESULT:%[a-z0-9]+]] = trunc i40 [[RESULT2]] to i16
  // UNSIGNED-NEXT: [[USA_SAT_RESIZE:%[a-z0-9]+]] = zext i16 [[USA_SAT]] to i39
  // UNSIGNED-NEXT: [[I_RESIZE:%[a-z0-9]+]] = sext i32 [[I]] to i39
  // UNSIGNED-NEXT: [[I_UPSCALE:%[a-z0-9]+]] = shl i39 [[I_RESIZE]], 7
  // UNSIGNED-NEXT: [[SUM:%[0-9]+]] = call i39 @llvm.uadd.sat.i39(i39 [[USA_SAT_RESIZE]], i39 [[I_UPSCALE]])
  // UNSIGNED-NEXT: [[USE_MAX:%[0-9]+]] = icmp sgt i39 [[SUM]], 32767
  // UNSIGNED-NEXT: [[RESULT:%[a-z0-9]+]] = select i1 [[USE_MAX]], i39 32767, i39 [[SUM]]
  // UNSIGNED-NEXT: [[USE_MIN:%[0-9]+]] = icmp slt i39 [[RESULT]], 0
  // UNSIGNED-NEXT: [[RESULT2:%[a-z0-9]+]] = select i1 [[USE_MIN]], i39 0, i39 [[RESULT]]
  // UNSIGNED-NEXT: [[RESULT:%[a-z0-9]+]] = trunc i39 [[RESULT2]] to i16
  // CHECK-NEXT: store i16 [[RESULT]], i16* %usa_sat, align 2
  usa_sat = usa_sat + i;
}