clang/test/CodeGen/bit-int-ubsan.c

   1 // REQUIRES: x86-registered-target
   2 // RUN: %clang_cc1 -triple x86_64-pc-linux-gnu -Wno-constant-conversion -Wno-array-bounds -Wno-division-by-zero -Wno-shift-negative-value -Wno-shift-count-negative -Wno-int-to-pointer-cast -fsanitize=array-bounds,enum,float-cast-overflow,integer-divide-by-zero,implicit-unsigned-integer-truncation,implicit-signed-integer-truncation,implicit-integer-sign-change,unsigned-integer-overflow,signed-integer-overflow,shift-base,shift-exponent -O0 -emit-llvm -o - %s | FileCheck %s
   3
   4 // The runtime test checking the _BitInt ubsan feature is located in compiler-rt/test/ubsan/TestCases/Integer/bit-int.c
   5
   6 typedef unsigned int uint32_t;
   7 uint32_t float_divide_by_zero() {
   8   float f = 1.0f / 0.0f;
   9   // CHECK: constant { i16, i16, [8 x i8] } { i16 1, i16 32, [8 x i8] c"'float'\00" }
  10   _BitInt(37) r = (_BitInt(37))f;
  11   // CHECK: constant { i16, i16, [20 x i8] } { i16 2, i16 13, [20 x i8] c"'_BitInt(37)'\00%\00\00\00\00\00" }
  12   return r;
  13 }
  14
  15 uint32_t integer_divide_by_zero() __attribute__((no_sanitize("memory"))) {
  16   _BitInt(37) x = 1 / 0;
  17   // CHECK: constant { i16, i16, [32 x i8] } { i16 0, i16 10, [32 x i8] c"'uint32_t' (aka 'unsigned int')\00" }
  18   return x;
  19 }
  20
  21 uint32_t implicit_unsigned_integer_truncation() {
  22   unsigned _BitInt(37) x = 2U;
  23   x += float_divide_by_zero();
  24   x += integer_divide_by_zero();
  25   x = x + 0xFFFFFFFFFFFFFFFFULL;
  26   // CHECK: constant { i16, i16, [23 x i8] } { i16 0, i16 12, [23 x i8] c"'unsigned _BitInt(37)'\00" }
  27   uint32_t r = x & 0xFFFFFFFF;
  28   return r;
  29 }
  30
  31 uint32_t array_bounds() {
  32   _BitInt(37) x[4];
  33   _BitInt(37) y = x[10];
  34   // CHECK: constant { i16, i16, [17 x i8] } { i16 -1, i16 0, [17 x i8] c"'_BitInt(37)[4]'\00" }
  35   return (uint32_t)y;
  36 }
  37
  38 uint32_t float_cast_overflow() {
  39   float a = 100000000.0f;
  40   _BitInt(7) b = (_BitInt(7))a;
  41   // CHECK: constant { i16, i16, [19 x i8] } { i16 2, i16 7, [19 x i8] c"'_BitInt(7)'\00\07\00\00\00\00\00" }
  42   return b;
  43 }
  44
  45 _BitInt(13) implicit_signed_integer_truncation() {
  46   _BitInt(73) x = (_BitInt(73)) ~((~0UL) >> 1);
  47   return x;
  48   // CHECK: constant { i16, i16, [20 x i8] } { i16 2, i16 {{([[:xdigit:]]{2})}}, [20 x i8] c"'_BitInt(73)'\00I\00\00\00\00\00" }
  49   // CHECK: constant { i16, i16, [20 x i8] } { i16 2, i16 9, [20 x i8] c"'_BitInt(13)'\00\0D\00\00\00\00\00" }
  50 }
  51
  52 uint32_t negative_shift1(unsigned _BitInt(37) x)
  53     __attribute__((no_sanitize("memory"))) {
  54   _BitInt(9) c = -2;
  55   return x >> c;
  56   // CHECK: constant { i16, i16, [19 x i8] } { i16 2, i16 9, [19 x i8] c"'_BitInt(9)'\00\09\00\00\00\00\00" }
  57 }
  58
  59 uint32_t negative_shift2(unsigned _BitInt(37) x)
  60     __attribute__((no_sanitize("memory"))) {
  61   _BitInt(17) c = -2;
  62   return x >> c;
  63   // CHECK: constant { i16, i16, [20 x i8] } { i16 2, i16 11, [20 x i8] c"'_BitInt(17)'\00\11\00\00\00\00\00" }
  64 }
  65
  66 uint32_t negative_shift3(unsigned _BitInt(37) x)
  67     __attribute__((no_sanitize("memory"))) {
  68   _BitInt(34) c = -2;
  69   return x >> c;
  70   // CHECK: constant { i16, i16, [20 x i8] } { i16 2, i16 13, [20 x i8] c"'_BitInt(34)'\00\22\00\00\00\00\00" }
  71 }
  72
  73 uint32_t negative_shift5(unsigned _BitInt(37) x)
  74     __attribute__((no_sanitize("memory"))) {
  75   _BitInt(68) c = -2;
  76   return x >> c;
  77   // CHECK: constant { i16, i16, [20 x i8] } { i16 2, i16 {{([[:xdigit:]]{2})}}, [20 x i8] c"'_BitInt(68)'\00D\00\00\00\00\00" }
  78 }