clang/test/CodeGen/catch-implicit-signed-integer-truncations-basics.c

   1 // RUN: %clang_cc1 -fsanitize=implicit-signed-integer-truncation -fsanitize-recover=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_1100_SIGNED_TRUNCATION:.*]] = {{.*}}, i32 1100, i32 10 }, {{.*}}, {{.*}}, i8 2, i32 0 }
  13 // CHECK-DAG: @[[LINE_1500_SIGNED_TRUNCATION:.*]] = {{.*}}, i32 1500, i32 10 }, {{.*}}, {{.*}}, i8 2, i32 0 }
  14 // CHECK-DAG: @[[LINE_1600_SIGNED_TRUNCATION:.*]] = {{.*}}, i32 1600, i32 10 }, {{.*}}, {{.*}}, i8 2, i32 0 }
  15
  16 // CHECK-LABEL: @convert_unsigned_int_to_unsigned_int
  17 unsigned int convert_unsigned_int_to_unsigned_int(unsigned int x) {
  18 #line 100
  19   return x;
  20 }
  21
  22 // CHECK-LABEL: @convert_unsigned_char_to_unsigned_char
  23 unsigned char convert_unsigned_char_to_unsigned_char(unsigned char x) {
  24 #line 200
  25   return x;
  26 }
  27
  28 // CHECK-LABEL: @convert_signed_int_to_signed_int
  29 signed int convert_signed_int_to_signed_int(signed int x) {
  30 #line 300
  31   return x;
  32 }
  33
  34 // CHECK-LABEL: @convert_signed_char_to_signed_char
  35 signed char convert_signed_char_to_signed_char(signed char x) {
  36 #line 400
  37   return x;
  38 }
  39
  40 // CHECK-LABEL: @convert_unsigned_int_to_unsigned_char
  41 unsigned char convert_unsigned_int_to_unsigned_char(unsigned int x) {
  42 #line 500
  43   return x;
  44 }
  45
  46 // CHECK-LABEL: @convert_unsigned_char_to_unsigned_int
  47 unsigned int convert_unsigned_char_to_unsigned_int(unsigned char x) {
  48 #line 600
  49   return x;
  50 }
  51
  52 // CHECK-LABEL: @convert_unsigned_char_to_signed_int
  53 signed int convert_unsigned_char_to_signed_int(unsigned char x) {
  54 #line 700
  55   return x;
  56 }
  57
  58 // CHECK-LABEL: @convert_signed_char_to_signed_int
  59 signed int convert_signed_char_to_signed_int(signed char x) {
  60 #line 800
  61   return x;
  62 }
  63
  64 // CHECK-LABEL: @convert_unsigned_int_to_signed_int
  65 signed int convert_unsigned_int_to_signed_int(unsigned int x) {
  66 #line 900
  67   return x;
  68 }
  69
  70 // CHECK-LABEL: @convert_signed_int_to_unsigned_int
  71 unsigned int convert_signed_int_to_unsigned_int(signed int x) {
  72 #line 1000
  73   return x;
  74 }
  75
  76 // CHECK-LABEL: @convert_signed_int_to_unsigned_char
  77 unsigned char convert_signed_int_to_unsigned_char(signed int x) {
  78   // CHECK: call void @__ubsan_handle_implicit_conversion(ptr @[[LINE_1100_SIGNED_TRUNCATION]]
  79 #line 1100
  80   return x;
  81 }
  82
  83 // CHECK-LABEL: @convert_signed_char_to_unsigned_char
  84 unsigned char convert_signed_char_to_unsigned_char(signed char x) {
  85 #line 1200
  86   return x;
  87 }
  88
  89 // CHECK-LABEL: @convert_unsigned_char_to_signed_char
  90 signed char convert_unsigned_char_to_signed_char(unsigned char x) {
  91 #line 1300
  92   return x;
  93 }
  94
  95 // CHECK-LABEL: @convert_signed_char_to_unsigned_int
  96 unsigned int convert_signed_char_to_unsigned_int(signed char x) {
  97 #line 1400
  98   return x;
  99 }
 100
 101 // CHECK-LABEL: @convert_unsigned_int_to_signed_char
 102 signed char convert_unsigned_int_to_signed_char(unsigned int x) {
 103   // CHECK: call void @__ubsan_handle_implicit_conversion(ptr @[[LINE_1500_SIGNED_TRUNCATION]]
 104 #line 1500
 105   return x;
 106 }
 107
 108 // CHECK-LABEL: @convert_signed_int_to_signed_char
 109 signed char convert_signed_int_to_signed_char(signed int x) {
 110   // CHECK: call void @__ubsan_handle_implicit_conversion(ptr @[[LINE_1600_SIGNED_TRUNCATION]]
 111 #line 1600
 112   return x;
 113 }