xref: /llvm-project/clang/test/CodeGen/catch-implicit-unsigned-integer-truncations-basics.c (revision 708c8cd7435002027a2cc9b99a0916a3dc255d63)
1 // RUN: %clang_cc1 -fsanitize=implicit-unsigned-integer-truncation -fsanitize-recover=implicit-unsigned-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 
14 // CHECK-LABEL: @convert_unsigned_int_to_unsigned_int
convert_unsigned_int_to_unsigned_int(unsigned int x)15 unsigned int convert_unsigned_int_to_unsigned_int(unsigned int x) {
16 #line 100
17   return x;
18 }
19 
20 // CHECK-LABEL: @convert_unsigned_char_to_unsigned_char
convert_unsigned_char_to_unsigned_char(unsigned char x)21 unsigned char convert_unsigned_char_to_unsigned_char(unsigned char x) {
22 #line 200
23   return x;
24 }
25 
26 // CHECK-LABEL: @convert_signed_int_to_signed_int
convert_signed_int_to_signed_int(signed int x)27 signed int convert_signed_int_to_signed_int(signed int x) {
28 #line 300
29   return x;
30 }
31 
32 // CHECK-LABEL: @convert_signed_char_to_signed_char
convert_signed_char_to_signed_char(signed char x)33 signed char convert_signed_char_to_signed_char(signed char x) {
34 #line 400
35   return x;
36 }
37 
38 // CHECK-LABEL: @convert_unsigned_int_to_unsigned_char
convert_unsigned_int_to_unsigned_char(unsigned int x)39 unsigned char convert_unsigned_int_to_unsigned_char(unsigned int x) {
40   // CHECK: call void @__ubsan_handle_implicit_conversion(ptr @[[LINE_500_UNSIGNED_TRUNCATION]]
41 #line 500
42   return x;
43 }
44 
45 // CHECK-LABEL: @convert_unsigned_char_to_unsigned_int
convert_unsigned_char_to_unsigned_int(unsigned char x)46 unsigned int convert_unsigned_char_to_unsigned_int(unsigned char x) {
47 #line 600
48   return x;
49 }
50 
51 // CHECK-LABEL: @convert_unsigned_char_to_signed_int
convert_unsigned_char_to_signed_int(unsigned char x)52 signed int convert_unsigned_char_to_signed_int(unsigned char x) {
53 #line 700
54   return x;
55 }
56 
57 // CHECK-LABEL: @convert_signed_char_to_signed_int
convert_signed_char_to_signed_int(signed char x)58 signed int convert_signed_char_to_signed_int(signed char x) {
59 #line 800
60   return x;
61 }
62 
63 // CHECK-LABEL: @convert_unsigned_int_to_signed_int
convert_unsigned_int_to_signed_int(unsigned int x)64 signed int convert_unsigned_int_to_signed_int(unsigned int x) {
65 #line 900
66   return x;
67 }
68 
69 // CHECK-LABEL: @convert_signed_int_to_unsigned_int
convert_signed_int_to_unsigned_int(signed int x)70 unsigned int convert_signed_int_to_unsigned_int(signed int x) {
71 #line 1000
72   return x;
73 }
74 
75 // CHECK-LABEL: @convert_signed_int_to_unsigned_char
convert_signed_int_to_unsigned_char(signed int x)76 unsigned char convert_signed_int_to_unsigned_char(signed int x) {
77 #line 1100
78   return x;
79 }
80 
81 // CHECK-LABEL: @convert_signed_char_to_unsigned_char
convert_signed_char_to_unsigned_char(signed char x)82 unsigned char convert_signed_char_to_unsigned_char(signed char x) {
83 #line 1200
84   return x;
85 }
86 
87 // CHECK-LABEL: @convert_unsigned_char_to_signed_char
convert_unsigned_char_to_signed_char(unsigned char x)88 signed char convert_unsigned_char_to_signed_char(unsigned char x) {
89 #line 1300
90   return x;
91 }
92 
93 // CHECK-LABEL: @convert_signed_char_to_unsigned_int
convert_signed_char_to_unsigned_int(signed char x)94 unsigned int convert_signed_char_to_unsigned_int(signed char x) {
95 #line 1400
96   return x;
97 }
98 
99 // CHECK-LABEL: @convert_unsigned_int_to_signed_char
convert_unsigned_int_to_signed_char(unsigned int x)100 signed char convert_unsigned_int_to_signed_char(unsigned int x) {
101 #line 1500
102   return x;
103 }
104 
105 // CHECK-LABEL: @convert_signed_int_to_signed_char
convert_signed_int_to_signed_char(signed int x)106 signed char convert_signed_int_to_signed_char(signed int x) {
107 #line 1600
108   return x;
109 }
110