1 // RUN: %clang_analyze_cc1 -analyzer-checker=core,debug.ExprInspection -triple x86_64-apple-darwin13 -Wno-shift-count-overflow -verify=expected,cxx17 -std=c++17 %s
2 // RUN: %clang_analyze_cc1 -analyzer-checker=core,debug.ExprInspection -triple x86_64-apple-darwin13 -Wno-shift-count-overflow -verify=expected,cxx2a -std=c++2a %s
3
testNegativeShift(int a)4 int testNegativeShift(int a) {
5 if (a == -5) {
6 return 1 << a; // expected-warning{{The result of the left shift is undefined because the right operand is negative}}
7 }
8 return 0;
9 }
10
testNegativeLeftShift(int a)11 int testNegativeLeftShift(int a) {
12 if (a == -3) {
13 return a << 1; // cxx17-warning{{The result of the left shift is undefined because the left operand is negative}}
14 }
15 return 0;
16 }
17
testUnrepresentableLeftShift(int a)18 int testUnrepresentableLeftShift(int a) {
19 if (a == 8)
20 return a << 30; // cxx17-warning{{The result of the left shift is undefined due to shifting '8' by '30', which is unrepresentable in the unsigned version of the return type 'int'}}
21 return 0;
22 }
23