clang/test/CodeGen/catch-implicit-integer-arithmetic-value-change-basics.c

   1 // RUN: %clang_cc1 -fsanitize=implicit-signed-integer-truncation,implicit-integer-sign-change -fsanitize-recover=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_900_SIGN_CHANGE:.*]] = {{.*}}, i32 900, i32 10 }, {{.*}}, {{.*}}, i8 3 }
  13 // CHECK-DAG: @[[LINE_1000_SIGN_CHANGE:.*]] = {{.*}}, i32 1000, i32 10 }, {{.*}}, {{.*}}, i8 3 }
  14 // CHECK-DAG: @[[LINE_1100_SIGNED_TRUNCATION:.*]] = {{.*}}, i32 1100, i32 10 }, {{.*}}, {{.*}}, i8 2 }
  15 // CHECK-DAG: @[[LINE_1200_SIGN_CHANGE:.*]] = {{.*}}, i32 1200, i32 10 }, {{.*}}, {{.*}}, i8 3 }
  16 // CHECK-DAG: @[[LINE_1300_SIGN_CHANGE:.*]] = {{.*}}, i32 1300, i32 10 }, {{.*}}, {{.*}}, i8 3 }
  17 // CHECK-DAG: @[[LINE_1400_SIGN_CHANGE:.*]] = {{.*}}, i32 1400, i32 10 }, {{.*}}, {{.*}}, i8 3 }
  18 // CHECK-DAG: @[[LINE_1500_SIGNED_TRUNCATION_OR_SIGN_CHANGE:.*]] = {{.*}}, i32 1500, i32 10 }, {{.*}}, {{.*}}, i8 4 }
  19 // CHECK-DAG: @[[LINE_1600_SIGNED_TRUNCATION:.*]] = {{.*}}, i32 1600, i32 10 }, {{.*}}, {{.*}}, i8 2 }
  20
  21 // CHECK-LABEL: @convert_unsigned_int_to_unsigned_int
  22 unsigned int convert_unsigned_int_to_unsigned_int(unsigned int x) {
  23 #line 100
  24   return x;
  25 }
  26
  27 // CHECK-LABEL: @convert_unsigned_char_to_unsigned_char
  28 unsigned char convert_unsigned_char_to_unsigned_char(unsigned char x) {
  29 #line 200
  30   return x;
  31 }
  32
  33 // CHECK-LABEL: @convert_signed_int_to_signed_int
  34 signed int convert_signed_int_to_signed_int(signed int x) {
  35 #line 300
  36   return x;
  37 }
  38
  39 // CHECK-LABEL: @convert_signed_char_to_signed_char
  40 signed char convert_signed_char_to_signed_char(signed char x) {
  41 #line 400
  42   return x;
  43 }
  44
  45 // CHECK-LABEL: @convert_unsigned_int_to_unsigned_char
  46 unsigned char convert_unsigned_int_to_unsigned_char(unsigned int x) {
  47 #line 500
  48   return x;
  49 }
  50
  51 // CHECK-LABEL: @convert_unsigned_char_to_unsigned_int
  52 unsigned int convert_unsigned_char_to_unsigned_int(unsigned char x) {
  53 #line 600
  54   return x;
  55 }
  56
  57 // CHECK-LABEL: @convert_unsigned_char_to_signed_int
  58 signed int convert_unsigned_char_to_signed_int(unsigned char x) {
  59 #line 700
  60   return x;
  61 }
  62
  63 // CHECK-LABEL: @convert_signed_char_to_signed_int
  64 signed int convert_signed_char_to_signed_int(signed char x) {
  65 #line 800
  66   return x;
  67 }
  68
  69 // CHECK-LABEL: @convert_unsigned_int_to_signed_int
  70 signed int convert_unsigned_int_to_signed_int(unsigned int x) {
  71   // CHECK: call void @__ubsan_handle_implicit_conversion(ptr @[[LINE_900_SIGN_CHANGE]]
  72 #line 900
  73   return x;
  74 }
  75
  76 // CHECK-LABEL: @convert_signed_int_to_unsigned_int
  77 unsigned int convert_signed_int_to_unsigned_int(signed int x) {
  78   // CHECK: call void @__ubsan_handle_implicit_conversion(ptr @[[LINE_1000_SIGN_CHANGE]]
  79 #line 1000
  80   return x;
  81 }
  82
  83 // CHECK-LABEL: @convert_signed_int_to_unsigned_char
  84 unsigned char convert_signed_int_to_unsigned_char(signed int x) {
  85   // CHECK: call void @__ubsan_handle_implicit_conversion(ptr @[[LINE_1100_SIGNED_TRUNCATION]]
  86 #line 1100
  87   return x;
  88 }
  89
  90 // CHECK-LABEL: @convert_signed_char_to_unsigned_char
  91 unsigned char convert_signed_char_to_unsigned_char(signed char x) {
  92   // CHECK: call void @__ubsan_handle_implicit_conversion(ptr @[[LINE_1200_SIGN_CHANGE]]
  93 #line 1200
  94   return x;
  95 }
  96
  97 // CHECK-LABEL: @convert_unsigned_char_to_signed_char
  98 signed char convert_unsigned_char_to_signed_char(unsigned char x) {
  99   // CHECK: call void @__ubsan_handle_implicit_conversion(ptr @[[LINE_1300_SIGN_CHANGE]]
 100 #line 1300
 101   return x;
 102 }
 103
 104 // CHECK-LABEL: @convert_signed_char_to_unsigned_int
 105 unsigned int convert_signed_char_to_unsigned_int(signed char x) {
 106   // CHECK: call void @__ubsan_handle_implicit_conversion(ptr @[[LINE_1400_SIGN_CHANGE]]
 107 #line 1400
 108   return x;
 109 }
 110
 111 // CHECK-LABEL: @convert_unsigned_int_to_signed_char
 112 signed char convert_unsigned_int_to_signed_char(unsigned int x) {
 113   // CHECK: call void @__ubsan_handle_implicit_conversion(ptr @[[LINE_1500_SIGNED_TRUNCATION_OR_SIGN_CHANGE]]
 114 #line 1500
 115   return x;
 116 }
 117
 118 // CHECK-LABEL: @convert_signed_int_to_signed_char
 119 signed char convert_signed_int_to_signed_char(signed int x) {
 120   // CHECK: call void @__ubsan_handle_implicit_conversion(ptr @[[LINE_1600_SIGNED_TRUNCATION]]
 121 #line 1600
 122   return x;
 123 }