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 } 13 // CHECK-DAG: @[[LINE_1100_SIGNED_TRUNCATION:.*]] = {{.*}}, i32 1100, i32 10 }, {{.*}}, {{.*}}, i8 2 } 14 // CHECK-DAG: @[[LINE_1500_SIGNED_TRUNCATION:.*]] = {{.*}}, i32 1500, i32 10 }, {{.*}}, {{.*}}, i8 2 } 15 // CHECK-DAG: @[[LINE_1600_SIGNED_TRUNCATION:.*]] = {{.*}}, i32 1600, i32 10 }, {{.*}}, {{.*}}, i8 2 } 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(i8* bitcast ({ {{{.*}}}, {{{.*}}}*, {{{.*}}}*, i8 }* @[[LINE_500_UNSIGNED_TRUNCATION]] to i8*) 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(i8* bitcast ({ {{{.*}}}, {{{.*}}}*, {{{.*}}}*, i8 }* @[[LINE_1100_SIGNED_TRUNCATION]] to i8*) 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(i8* bitcast ({ {{{.*}}}, {{{.*}}}*, {{{.*}}}*, i8 }* @[[LINE_1500_SIGNED_TRUNCATION]] to i8*) 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(i8* bitcast ({ {{{.*}}}, {{{.*}}}*, {{{.*}}}*, i8 }* @[[LINE_1600_SIGNED_TRUNCATION]] to i8*) 113 #line 1600 114 return x; 115 } 116