clang/test/CodeGen/catch-implicit-integer-truncations-basics.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 // Test plan:
   4 //  * Two types - int and char
   5 //  * Two signs - signed and unsigned
   6 //  * Square that - we have input and output types.
   7 // Thus, there are total of (2*2)^2 == 16 tests.
   8 // These are all the possible variations/combinations of casts.
   9 // However, not all of them should result in the check.
  10 // So here, we *only* check which should and which should not result in checks.
  11
  12 // CHECK-DAG: @[[LINE_500_UNSIGNED_TRUNCATION:.*]] = {{.*}}, i32 500, i32 10 }, {{.*}}, {{.*}}, i8 1, i32 0 }
  13 // CHECK-DAG: @[[LINE_1100_SIGNED_TRUNCATION:.*]] = {{.*}}, i32 1100, i32 10 }, {{.*}}, {{.*}}, i8 2, i32 0 }
  14 // CHECK-DAG: @[[LINE_1500_SIGNED_TRUNCATION:.*]] = {{.*}}, i32 1500, i32 10 }, {{.*}}, {{.*}}, i8 2, i32 0 }
  15 // CHECK-DAG: @[[LINE_1600_SIGNED_TRUNCATION:.*]] = {{.*}}, i32 1600, i32 10 }, {{.*}}, {{.*}}, i8 2, i32 0 }
  16
  17 // CHECK-LABEL: @convert_unsigned_int_to_unsigned_int
  18 unsigned int convert_unsigned_int_to_unsigned_int(unsigned int x) {
  19 #line 100
  20   return x;
  21 }
  22
  23 // CHECK-LABEL: @convert_unsigned_char_to_unsigned_char
  24 unsigned char convert_unsigned_char_to_unsigned_char(unsigned char x) {
  25 #line 200
  26   return x;
  27 }
  28
  29 // CHECK-LABEL: @convert_signed_int_to_signed_int
  30 signed int convert_signed_int_to_signed_int(signed int x) {
  31 #line 300
  32   return x;
  33 }
  34
  35 // CHECK-LABEL: @convert_signed_char_to_signed_char
  36 signed char convert_signed_char_to_signed_char(signed char x) {
  37 #line 400
  38   return x;
  39 }
  40
  41 // CHECK-LABEL: @convert_unsigned_int_to_unsigned_char
  42 unsigned char convert_unsigned_int_to_unsigned_char(unsigned int x) {
  43   // CHECK: call void @__ubsan_handle_implicit_conversion(ptr @[[LINE_500_UNSIGNED_TRUNCATION]]
  44 #line 500
  45   return x;
  46 }
  47
  48 // CHECK-LABEL: @convert_unsigned_char_to_unsigned_int
  49 unsigned int convert_unsigned_char_to_unsigned_int(unsigned char x) {
  50 #line 600
  51   return x;
  52 }
  53
  54 // CHECK-LABEL: @convert_unsigned_char_to_signed_int
  55 signed int convert_unsigned_char_to_signed_int(unsigned char x) {
  56 #line 700
  57   return x;
  58 }
  59
  60 // CHECK-LABEL: @convert_signed_char_to_signed_int
  61 signed int convert_signed_char_to_signed_int(signed char x) {
  62 #line 800
  63   return x;
  64 }
  65
  66 // CHECK-LABEL: @convert_unsigned_int_to_signed_int
  67 signed int convert_unsigned_int_to_signed_int(unsigned int x) {
  68 #line 900
  69   return x;
  70 }
  71
  72 // CHECK-LABEL: @convert_signed_int_to_unsigned_int
  73 unsigned int convert_signed_int_to_unsigned_int(signed int x) {
  74 #line 1000
  75   return x;
  76 }
  77
  78 // CHECK-LABEL: @convert_signed_int_to_unsigned_char
  79 unsigned char convert_signed_int_to_unsigned_char(signed int x) {
  80   // CHECK: call void @__ubsan_handle_implicit_conversion(ptr @[[LINE_1100_SIGNED_TRUNCATION]]
  81 #line 1100
  82   return x;
  83 }
  84
  85 // CHECK-LABEL: @convert_signed_char_to_unsigned_char
  86 unsigned char convert_signed_char_to_unsigned_char(signed char x) {
  87 #line 1200
  88   return x;
  89 }
  90
  91 // CHECK-LABEL: @convert_unsigned_char_to_signed_char
  92 signed char convert_unsigned_char_to_signed_char(unsigned char x) {
  93 #line 1300
  94   return x;
  95 }
  96
  97 // CHECK-LABEL: @convert_signed_char_to_unsigned_int
  98 unsigned int convert_signed_char_to_unsigned_int(signed char x) {
  99 #line 1400
 100   return x;
 101 }
 102
 103 // CHECK-LABEL: @convert_unsigned_int_to_signed_char
 104 signed char convert_unsigned_int_to_signed_char(unsigned int x) {
 105   // CHECK: call void @__ubsan_handle_implicit_conversion(ptr @[[LINE_1500_SIGNED_TRUNCATION]]
 106 #line 1500
 107   return x;
 108 }
 109
 110 // CHECK-LABEL: @convert_signed_int_to_signed_char
 111 signed char convert_signed_int_to_signed_char(signed int x) {
 112   // CHECK: call void @__ubsan_handle_implicit_conversion(ptr @[[LINE_1600_SIGNED_TRUNCATION]]
 113 #line 1600
 114   return x;
 115 }