| Vedant Kumar | 82ee16b | 2017-02-25 00:43:36 +0000 | [diff] [blame^] | 1 | // RUN: %clang_cc1 -std=c++11 -triple x86_64-apple-darwin10 -emit-llvm -o - %s -fsanitize=signed-integer-overflow,unsigned-integer-overflow | FileCheck %s |
| 2 | |
| 3 | typedef unsigned char uchar; |
| 4 | typedef unsigned short ushort; |
| 5 | |
| 6 | enum E1 : int { |
| 7 | a |
| 8 | }; |
| 9 | |
| 10 | enum E2 : char { |
| 11 | b |
| 12 | }; |
| 13 | |
| 14 | // CHECK-LABEL: define signext i8 @_Z4add1 |
| 15 | // CHECK-NOT: sadd.with.overflow |
| 16 | char add1(char c) { return c + c; } |
| 17 | |
| 18 | // CHECK-LABEL: define zeroext i8 @_Z4add2 |
| 19 | // CHECK-NOT: uadd.with.overflow |
| 20 | uchar add2(uchar uc) { return uc + uc; } |
| 21 | |
| 22 | // CHECK-LABEL: define i32 @_Z4add3 |
| 23 | // CHECK: sadd.with.overflow |
| 24 | int add3(E1 e) { return e + a; } |
| 25 | |
| 26 | // CHECK-LABEL: define signext i8 @_Z4add4 |
| 27 | // CHECK-NOT: sadd.with.overflow |
| 28 | char add4(E2 e) { return e + b; } |
| 29 | |
| 30 | // CHECK-LABEL: define signext i8 @_Z4sub1 |
| 31 | // CHECK-NOT: ssub.with.overflow |
| 32 | char sub1(char c) { return c - c; } |
| 33 | |
| 34 | // CHECK-LABEL: define zeroext i8 @_Z4sub2 |
| 35 | // CHECK-NOT: usub.with.overflow |
| 36 | uchar sub2(uchar uc) { return uc - uc; } |
| 37 | |
| 38 | // CHECK-LABEL: define signext i8 @_Z4sub3 |
| 39 | // CHECK-NOT: ssub.with.overflow |
| 40 | char sub3(char c) { return -c; } |
| 41 | |
| 42 | // Note: -INT_MIN can overflow. |
| 43 | // |
| 44 | // CHECK-LABEL: define i32 @_Z4sub4 |
| 45 | // CHECK: ssub.with.overflow |
| 46 | int sub4(int i) { return -i; } |
| 47 | |
| 48 | // CHECK-LABEL: define signext i8 @_Z4mul1 |
| 49 | // CHECK-NOT: smul.with.overflow |
| 50 | char mul1(char c) { return c * c; } |
| 51 | |
| 52 | // CHECK-LABEL: define zeroext i8 @_Z4mul2 |
| 53 | // CHECK-NOT: smul.with.overflow |
| 54 | uchar mul2(uchar uc) { return uc * uc; } |
| 55 | |
| 56 | // Note: USHRT_MAX * USHRT_MAX can overflow. |
| 57 | // |
| 58 | // CHECK-LABEL: define zeroext i16 @_Z4mul3 |
| 59 | // CHECK: smul.with.overflow |
| 60 | ushort mul3(ushort us) { return us * us; } |
| 61 | |
| 62 | // CHECK-LABEL: define i32 @_Z4mul4 |
| 63 | // CHECK: smul.with.overflow |
| 64 | int mul4(int i, char c) { return i * c; } |
| 65 | |
| 66 | // CHECK-LABEL: define i32 @_Z4mul5 |
| 67 | // CHECK: smul.with.overflow |
| 68 | int mul5(int i, char c) { return c * i; } |
| 69 | |
| 70 | // CHECK-LABEL: define signext i16 @_Z4mul6 |
| 71 | // CHECK-NOT: smul.with.overflow |
| 72 | short mul6(short s) { return s * s; } |
| 73 | |
| 74 | // CHECK-LABEL: define signext i8 @_Z4div1 |
| 75 | // CHECK-NOT: ubsan_handle_divrem_overflow |
| 76 | char div1(char c) { return c / c; } |
| 77 | |
| 78 | // CHECK-LABEL: define zeroext i8 @_Z4div2 |
| 79 | // CHECK-NOT: ubsan_handle_divrem_overflow |
| 80 | uchar div2(uchar uc) { return uc / uc; } |
| 81 | |
| 82 | // CHECK-LABEL: define signext i8 @_Z4div3 |
| 83 | // CHECK-NOT: ubsan_handle_divrem_overflow |
| 84 | char div3(char c, int i) { return c / i; } |
| 85 | |
| 86 | // CHECK-LABEL: define signext i8 @_Z4div4 |
| 87 | // CHECK: ubsan_handle_divrem_overflow |
| 88 | char div4(int i, char c) { return i / c; } |
| 89 | |
| 90 | // Note: INT_MIN / -1 can overflow. |
| 91 | // |
| 92 | // CHECK-LABEL: define signext i8 @_Z4div5 |
| 93 | // CHECK: ubsan_handle_divrem_overflow |
| 94 | char div5(int i, char c) { return i / c; } |
| 95 | |
| 96 | // CHECK-LABEL: define signext i8 @_Z4rem1 |
| 97 | // CHECK-NOT: ubsan_handle_divrem_overflow |
| 98 | char rem1(char c) { return c % c; } |
| 99 | |
| 100 | // CHECK-LABEL: define zeroext i8 @_Z4rem2 |
| 101 | // CHECK-NOT: ubsan_handle_divrem_overflow |
| 102 | uchar rem2(uchar uc) { return uc % uc; } |
| 103 | |
| 104 | // FIXME: This is a long-standing false negative. |
| 105 | // |
| 106 | // CHECK-LABEL: define signext i8 @_Z4rem3 |
| 107 | // rdar30301609: ubsan_handle_divrem_overflow |
| 108 | char rem3(int i, char c) { return i % c; } |
| 109 | |
| 110 | // CHECK-LABEL: define signext i8 @_Z4inc1 |
| 111 | // CHECK-NOT: sadd.with.overflow |
| 112 | char inc1(char c) { return c++ + (char)0; } |
| 113 | |
| 114 | // CHECK-LABEL: define zeroext i8 @_Z4inc2 |
| 115 | // CHECK-NOT: uadd.with.overflow |
| 116 | uchar inc2(uchar uc) { return uc++ + (uchar)0; } |
| 117 | |
| 118 | // CHECK-LABEL: define void @_Z4inc3 |
| 119 | // CHECK-NOT: sadd.with.overflow |
| 120 | void inc3(char c) { c++; } |
| 121 | |
| 122 | // CHECK-LABEL: define void @_Z4inc4 |
| 123 | // CHECK-NOT: uadd.with.overflow |
| 124 | void inc4(uchar uc) { uc++; } |