clang/test/CodeGen/catch-implicit-integer-truncations-basics-negatives.c

   1 // RUN: %clang_cc1 -fsanitize=implicit-unsigned-integer-truncation,implicit-signed-integer-truncation -fsanitize-recover=implicit-unsigned-integer-truncation,implicit-signed-integer-truncation -emit-llvm %s -o - -triple x86_64-linux-gnu | FileCheck %s -implicit-check-not="call void @__ubsan_handle_implicit_conversion" --check-prefixes=CHECK
   2
   3 // CHECK-DAG: @[[LINE_100_UNSIGNED_TRUNCATION:.*]] = {{.*}}, i32 100, i32 10 }, {{.*}}, {{.*}}, i8 1, i32 0 }
   4 // CHECK-DAG: @[[LINE_200_UNSIGNED_TRUNCATION:.*]] = {{.*}}, i32 200, i32 10 }, {{.*}}, {{.*}}, i8 1, i32 0 }
   5 // CHECK-DAG: @[[LINE_300_SIGNED_TRUNCATION:.*]] = {{.*}}, i32 300, i32 10 }, {{.*}}, {{.*}}, i8 2, i32 0 }
   6 // CHECK-DAG: @[[LINE_400_SIGNED_TRUNCATION:.*]] = {{.*}}, i32 400, i32 10 }, {{.*}}, {{.*}}, i8 2, i32 0 }
   7
   8 //----------------------------------------------------------------------------//
   9 // Unsigned case.
  10 //----------------------------------------------------------------------------//
  11
  12 // CHECK-LABEL: @ignorelist_0_convert_unsigned_int_to_unsigned_char
  13 __attribute__((no_sanitize("undefined"))) unsigned char ignorelist_0_convert_unsigned_int_to_unsigned_char(unsigned int x) {
  14   // We are not in "undefined" group, so that doesn't work.
  15   // CHECK: call void @__ubsan_handle_implicit_conversion(ptr @[[LINE_100_UNSIGNED_TRUNCATION]]
  16 #line 100
  17   return x;
  18 }
  19
  20 // CHECK-LABEL: @ignorelist_1_convert_unsigned_int_to_unsigned_char
  21 __attribute__((no_sanitize("integer"))) unsigned char ignorelist_1_convert_unsigned_int_to_unsigned_char(unsigned int x) {
  22   return x;
  23 }
  24
  25 // CHECK-LABEL: @ignorelist_2_convert_unsigned_int_to_unsigned_char
  26 __attribute__((no_sanitize("implicit-conversion"))) unsigned char ignorelist_2_convert_unsigned_int_to_unsigned_char(unsigned int x) {
  27   return x;
  28 }
  29
  30 // CHECK-LABEL: @ignorelist_3_convert_unsigned_int_to_unsigned_char
  31 __attribute__((no_sanitize("implicit-integer-truncation"))) unsigned char ignorelist_3_convert_unsigned_int_to_unsigned_char(unsigned int x) {
  32   return x;
  33 }
  34
  35 // CHECK-LABEL: @ignorelist_4_convert_unsigned_int_to_unsigned_char
  36 __attribute__((no_sanitize("implicit-unsigned-integer-truncation"))) unsigned char ignorelist_4_convert_unsigned_int_to_unsigned_char(unsigned int x) {
  37   return x;
  38 }
  39
  40 // CHECK-LABEL: @ignorelist_5_convert_unsigned_int_to_unsigned_char
  41 __attribute__((no_sanitize("implicit-signed-integer-truncation"))) unsigned char ignorelist_5_convert_unsigned_int_to_unsigned_char(unsigned int x) {
  42   // This is an unsigned truncation, not signed-one.
  43   // CHECK: call void @__ubsan_handle_implicit_conversion(ptr @[[LINE_200_UNSIGNED_TRUNCATION]]
  44 #line 200
  45   return x;
  46 }
  47
  48 //----------------------------------------------------------------------------//
  49 // Signed case.
  50 //----------------------------------------------------------------------------//
  51
  52 // CHECK-LABEL: @ignorelist_0_convert_signed_int_to_signed_char
  53 __attribute__((no_sanitize("undefined"))) signed char ignorelist_0_convert_signed_int_to_signed_char(signed int x) {
  54   // We are not in "undefined" group, so that doesn't work.
  55   // CHECK: call void @__ubsan_handle_implicit_conversion(ptr @[[LINE_300_SIGNED_TRUNCATION]]
  56 #line 300
  57   return x;
  58 }
  59
  60 // CHECK-LABEL: @ignorelist_1_convert_signed_int_to_signed_char
  61 __attribute__((no_sanitize("integer"))) signed char ignorelist_1_convert_signed_int_to_signed_char(signed int x) {
  62   return x;
  63 }
  64
  65 // CHECK-LABEL: @ignorelist_2_convert_signed_int_to_signed_char
  66 __attribute__((no_sanitize("implicit-conversion"))) signed char ignorelist_2_convert_signed_int_to_signed_char(signed int x) {
  67   return x;
  68 }
  69
  70 // CHECK-LABEL: @ignorelist_3_convert_signed_int_to_signed_char
  71 __attribute__((no_sanitize("implicit-integer-truncation"))) signed char ignorelist_3_convert_signed_int_to_signed_char(signed int x) {
  72   return x;
  73 }
  74
  75 // CHECK-LABEL: @ignorelist_4_convert_signed_int_to_signed_char
  76 __attribute__((no_sanitize("implicit-signed-integer-truncation"))) signed char ignorelist_4_convert_signed_int_to_signed_char(signed int x) {
  77   return x;
  78 }
  79
  80 // CHECK-LABEL: @ignorelist_5_convert_signed_int_to_signed_char
  81 __attribute__((no_sanitize("implicit-unsigned-integer-truncation"))) signed char ignorelist_5_convert_signed_int_to_signed_char(signed int x) {
  82   // This is an signed truncation, not unsigned-one.
  83   // CHECK: call void @__ubsan_handle_implicit_conversion(ptr @[[LINE_400_SIGNED_TRUNCATION]]
  84 #line 400
  85   return x;
  86 }