clang/test/CodeGen/catch-implicit-integer-conversions-basics.c

   1 // RUN: %clang_cc1 -fsanitize=implicit-unsigned-integer-truncation,implicit-signed-integer-truncation,implicit-integer-sign-change -fsanitize-recover=implicit-unsigned-integer-truncation,implicit-signed-integer-truncation,implicit-integer-sign-change -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 }
  13 // CHECK-DAG: @[[LINE_900_SIGN_CHANGE:.*]] = {{.*}}, i32 900, i32 10 }, {{.*}}, {{.*}}, i8 3 }
  14 // CHECK-DAG: @[[LINE_1000_SIGN_CHANGE:.*]] = {{.*}}, i32 1000, i32 10 }, {{.*}}, {{.*}}, i8 3 }
  15 // CHECK-DAG: @[[LINE_1100_SIGNED_TRUNCATION:.*]] = {{.*}}, i32 1100, i32 10 }, {{.*}}, {{.*}}, i8 2 }
  16 // CHECK-DAG: @[[LINE_1200_SIGN_CHANGE:.*]] = {{.*}}, i32 1200, i32 10 }, {{.*}}, {{.*}}, i8 3 }
  17 // CHECK-DAG: @[[LINE_1300_SIGN_CHANGE:.*]] = {{.*}}, i32 1300, i32 10 }, {{.*}}, {{.*}}, i8 3 }
  18 // CHECK-DAG: @[[LINE_1400_SIGN_CHANGE:.*]] = {{.*}}, i32 1400, i32 10 }, {{.*}}, {{.*}}, i8 3 }
  19 // CHECK-DAG: @[[LINE_1500_SIGNED_TRUNCATION_OR_SIGN_CHANGE:.*]] = {{.*}}, i32 1500, i32 10 }, {{.*}}, {{.*}}, i8 4 }
  20 // CHECK-DAG: @[[LINE_1600_SIGNED_TRUNCATION:.*]] = {{.*}}, i32 1600, i32 10 }, {{.*}}, {{.*}}, i8 2 }
  21
  22 // CHECK-LABEL: @convert_unsigned_int_to_unsigned_int
  23 unsigned int convert_unsigned_int_to_unsigned_int(unsigned int x) {
  24 #line 100
  25   return x;
  26 }
  27
  28 // CHECK-LABEL: @convert_unsigned_char_to_unsigned_char
  29 unsigned char convert_unsigned_char_to_unsigned_char(unsigned char x) {
  30 #line 200
  31   return x;
  32 }
  33
  34 // CHECK-LABEL: @convert_signed_int_to_signed_int
  35 signed int convert_signed_int_to_signed_int(signed int x) {
  36 #line 300
  37   return x;
  38 }
  39
  40 // CHECK-LABEL: @convert_signed_char_to_signed_char
  41 signed char convert_signed_char_to_signed_char(signed char x) {
  42 #line 400
  43   return x;
  44 }
  45
  46 // CHECK-LABEL: @convert_unsigned_int_to_unsigned_char
  47 unsigned char convert_unsigned_int_to_unsigned_char(unsigned int x) {
  48   // CHECK: call void @__ubsan_handle_implicit_conversion(ptr @[[LINE_500_UNSIGNED_TRUNCATION]]
  49 #line 500
  50   return x;
  51 }
  52
  53 // CHECK-LABEL: @convert_unsigned_char_to_unsigned_int
  54 unsigned int convert_unsigned_char_to_unsigned_int(unsigned char x) {
  55 #line 600
  56   return x;
  57 }
  58
  59 // CHECK-LABEL: @convert_unsigned_char_to_signed_int
  60 signed int convert_unsigned_char_to_signed_int(unsigned char x) {
  61 #line 700
  62   return x;
  63 }
  64
  65 // CHECK-LABEL: @convert_signed_char_to_signed_int
  66 signed int convert_signed_char_to_signed_int(signed char x) {
  67 #line 800
  68   return x;
  69 }
  70
  71 // CHECK-LABEL: @convert_unsigned_int_to_signed_int
  72 signed int convert_unsigned_int_to_signed_int(unsigned int x) {
  73   // CHECK: call void @__ubsan_handle_implicit_conversion(ptr @[[LINE_900_SIGN_CHANGE]]
  74 #line 900
  75   return x;
  76 }
  77
  78 // CHECK-LABEL: @convert_signed_int_to_unsigned_int
  79 unsigned int convert_signed_int_to_unsigned_int(signed int x) {
  80   // CHECK: call void @__ubsan_handle_implicit_conversion(ptr @[[LINE_1000_SIGN_CHANGE]]
  81 #line 1000
  82   return x;
  83 }
  84
  85 // CHECK-LABEL: @convert_signed_int_to_unsigned_char
  86 unsigned char convert_signed_int_to_unsigned_char(signed int x) {
  87   // CHECK: call void @__ubsan_handle_implicit_conversion(ptr @[[LINE_1100_SIGNED_TRUNCATION]]
  88 #line 1100
  89   return x;
  90 }
  91
  92 // CHECK-LABEL: @convert_signed_char_to_unsigned_char
  93 unsigned char convert_signed_char_to_unsigned_char(signed char x) {
  94   // CHECK: call void @__ubsan_handle_implicit_conversion(ptr @[[LINE_1200_SIGN_CHANGE]]
  95 #line 1200
  96   return x;
  97 }
  98
  99 // CHECK-LABEL: @convert_unsigned_char_to_signed_char
 100 signed char convert_unsigned_char_to_signed_char(unsigned char x) {
 101   // CHECK: call void @__ubsan_handle_implicit_conversion(ptr @[[LINE_1300_SIGN_CHANGE]]
 102 #line 1300
 103   return x;
 104 }
 105
 106 // CHECK-LABEL: @convert_signed_char_to_unsigned_int
 107 unsigned int convert_signed_char_to_unsigned_int(signed char x) {
 108   // CHECK: call void @__ubsan_handle_implicit_conversion(ptr @[[LINE_1400_SIGN_CHANGE]]
 109 #line 1400
 110   return x;
 111 }
 112
 113 // CHECK-LABEL: @convert_unsigned_int_to_signed_char
 114 signed char convert_unsigned_int_to_signed_char(unsigned int x) {
 115   // CHECK: call void @__ubsan_handle_implicit_conversion(ptr @[[LINE_1500_SIGNED_TRUNCATION_OR_SIGN_CHANGE]]
 116 #line 1500
 117   return x;
 118 }
 119
 120 // CHECK-LABEL: @convert_signed_int_to_signed_char
 121 signed char convert_signed_int_to_signed_char(signed int x) {
 122   // CHECK: call void @__ubsan_handle_implicit_conversion(ptr @[[LINE_1600_SIGNED_TRUNCATION]]
 123 #line 1600
 124   return x;
 125 }